; RUN: opt -aa-pipeline=basic-aa -passes=objc-arc -S < %s | FileCheck %s target datalayout = "e-p:64:64:64" declare ptr @llvm.objc.retain(ptr) declare ptr @llvm.objc.retainAutoreleasedReturnValue(ptr) declare ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr) declare void @llvm.objc.release(ptr) declare ptr @llvm.objc.autorelease(ptr) declare ptr @llvm.objc.autoreleaseReturnValue(ptr) declare void @llvm.objc.autoreleasePoolPop(ptr) declare ptr @llvm.objc.autoreleasePoolPush() declare ptr @llvm.objc.retainBlock(ptr) declare ptr @llvm.objc.retainedObject(ptr) declare ptr @llvm.objc.unretainedObject(ptr) declare ptr @llvm.objc.unretainedPointer(ptr) declare void @use_pointer(ptr) declare void @callee() declare void @callee2(ptr, ptr) declare void @callee_fnptr(ptr) declare void @invokee() declare ptr @returner() declare void @bar(ptr) declare void @llvm.dbg.value(metadata, metadata, metadata) declare ptr @objc_msgSend(ptr, ptr, ...) ; Simple retain+release pair deletion, with some intervening control ; flow and harmless instructions. ; CHECK: define void @test0_precise(ptr %x, i1 %p) [[NUW:#[0-9]+]] { ; CHECK: @llvm.objc.retain ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test0_precise(ptr %x, i1 %p) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %t, label %f t: store i8 3, ptr %x store float 2.0, ptr %x br label %return f: store i32 7, ptr %x br label %return return: call void @llvm.objc.release(ptr %x) nounwind ret void } ; CHECK: define void @test0_imprecise(ptr %x, i1 %p) [[NUW]] { ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test0_imprecise(ptr %x, i1 %p) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %t, label %f t: store i8 3, ptr %x store float 2.0, ptr %x br label %return f: store i32 7, ptr %x br label %return return: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 ret void } ; Like test0 but the release isn't always executed when the retain is, ; so the optimization is not safe. ; TODO: Make the llvm.objc.release's argument be %0. ; CHECK: define void @test1_precise(ptr %x, i1 %p, i1 %q) [[NUW]] { ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK: @llvm.objc.release(ptr %x) ; CHECK: {{^}}} define void @test1_precise(ptr %x, i1 %p, i1 %q) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %t, label %f t: store i8 3, ptr %x store float 2.0, ptr %x br label %return f: store i32 7, ptr %x call void @callee() br i1 %q, label %return, label %alt_return return: call void @llvm.objc.release(ptr %x) nounwind ret void alt_return: ret void } ; CHECK: define void @test1_imprecise(ptr %x, i1 %p, i1 %q) [[NUW]] { ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test1_imprecise(ptr %x, i1 %p, i1 %q) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %t, label %f t: store i8 3, ptr %x store float 2.0, ptr %x br label %return f: store i32 7, ptr %x call void @callee() br i1 %q, label %return, label %alt_return return: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 ret void alt_return: ret void } ; Don't do partial elimination into two different CFG diamonds. ; CHECK: define void @test1b_precise(ptr %x, i1 %p, i1 %q) { ; CHECK: entry: ; CHECK: tail call ptr @llvm.objc.retain(ptr %x) [[NUW]] ; CHECK-NOT: @llvm.objc. ; CHECK: if.end5: ; CHECK: tail call void @llvm.objc.release(ptr %x) [[NUW]] ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test1b_precise(ptr %x, i1 %p, i1 %q) { entry: tail call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %if.then, label %if.end if.then: ; preds = %entry tail call void @callee() br label %if.end if.end: ; preds = %if.then, %entry br i1 %q, label %if.then3, label %if.end5 if.then3: ; preds = %if.end tail call void @use_pointer(ptr %x) br label %if.end5 if.end5: ; preds = %if.then3, %if.end tail call void @llvm.objc.release(ptr %x) nounwind ret void } ; CHECK-LABEL: define void @test1b_imprecise( ; CHECK: entry: ; CHECK: tail call ptr @llvm.objc.retain(ptr %x) [[NUW:#[0-9]+]] ; CHECK-NOT: @llvm.objc. ; CHECK: if.end5: ; CHECK: tail call void @llvm.objc.release(ptr %x) [[NUW]], !clang.imprecise_release ![[RELEASE:[0-9]+]] ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test1b_imprecise(ptr %x, i1 %p, i1 %q) { entry: tail call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %if.then, label %if.end if.then: ; preds = %entry tail call void @callee() br label %if.end if.end: ; preds = %if.then, %entry br i1 %q, label %if.then3, label %if.end5 if.then3: ; preds = %if.end tail call void @use_pointer(ptr %x) br label %if.end5 if.end5: ; preds = %if.then3, %if.end tail call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 ret void } ; Like test0 but the pointer is passed to an intervening call, ; so the optimization is not safe. ; CHECK-LABEL: define void @test2_precise( ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test2_precise(ptr %x, i1 %p) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %t, label %f t: store i8 3, ptr %x store float 2.0, ptr %x br label %return f: store i32 7, ptr %x call void @use_pointer(ptr %0) store float 3.0, ptr %x br label %return return: call void @llvm.objc.release(ptr %x) nounwind ret void } ; CHECK-LABEL: define void @test2_imprecise( ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test2_imprecise(ptr %x, i1 %p) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %t, label %f t: store i8 3, ptr %x store float 2.0, ptr %x br label %return f: store i32 7, ptr %x call void @use_pointer(ptr %0) store float 3.0, ptr %x br label %return return: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 ret void } ; Like test0 but the release is in a loop, ; so the optimization is not safe. ; TODO: For now, assume this can't happen. ; CHECK-LABEL: define void @test3_precise( ; TODO: @llvm.objc.retain(ptr %a) ; TODO: @llvm.objc.release ; CHECK: {{^}}} define void @test3_precise(ptr %x, ptr %q) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br label %loop loop: call void @llvm.objc.release(ptr %x) nounwind %j = load volatile i1, ptr %q br i1 %j, label %loop, label %return return: ret void } ; CHECK-LABEL: define void @test3_imprecise( ; TODO: @llvm.objc.retain(ptr %a) ; TODO: @llvm.objc.release ; CHECK: {{^}}} define void @test3_imprecise(ptr %x, ptr %q) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br label %loop loop: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 %j = load volatile i1, ptr %q br i1 %j, label %loop, label %return return: ret void } ; TODO: For now, assume this can't happen. ; Like test0 but the retain is in a loop, ; so the optimization is not safe. ; CHECK-LABEL: define void @test4_precise( ; TODO: @llvm.objc.retain(ptr %a) ; TODO: @llvm.objc.release ; CHECK: {{^}}} define void @test4_precise(ptr %x, ptr %q) nounwind { entry: br label %loop loop: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind %j = load volatile i1, ptr %q br i1 %j, label %loop, label %return return: call void @llvm.objc.release(ptr %x) nounwind ret void } ; CHECK-LABEL: define void @test4_imprecise( ; TODO: @llvm.objc.retain(ptr %a) ; TODO: @llvm.objc.release ; CHECK: {{^}}} define void @test4_imprecise(ptr %x, ptr %q) nounwind { entry: br label %loop loop: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind %j = load volatile i1, ptr %q br i1 %j, label %loop, label %return return: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 ret void } ; Like test0 but the pointer is conditionally passed to an intervening call, ; so the optimization is not safe. ; CHECK-LABEL: define void @test5a( ; CHECK: @llvm.objc.retain(ptr ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test5a(ptr %x, i1 %q, ptr %y) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind %s = select i1 %q, ptr %y, ptr %0 call void @use_pointer(ptr %s) store i32 7, ptr %x call void @llvm.objc.release(ptr %x) nounwind ret void } ; CHECK-LABEL: define void @test5b( ; CHECK: @llvm.objc.retain(ptr ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test5b(ptr %x, i1 %q, ptr %y) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind %s = select i1 %q, ptr %y, ptr %0 call void @use_pointer(ptr %s) store i32 7, ptr %x call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 ret void } ; retain+release pair deletion, where the release happens on two different ; flow paths. ; CHECK-LABEL: define void @test6a( ; CHECK: entry: ; CHECK: tail call ptr @llvm.objc.retain ; CHECK: t: ; CHECK: call void @llvm.objc.release ; CHECK: f: ; CHECK: call void @llvm.objc.release ; CHECK: return: ; CHECK: {{^}}} define void @test6a(ptr %x, i1 %p) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %t, label %f t: store i8 3, ptr %x store float 2.0, ptr %x call void @llvm.objc.release(ptr %x) nounwind br label %return f: store i32 7, ptr %x call void @callee() call void @llvm.objc.release(ptr %x) nounwind br label %return return: ret void } ; CHECK-LABEL: define void @test6b( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test6b(ptr %x, i1 %p) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %t, label %f t: store i8 3, ptr %x store float 2.0, ptr %x call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %return f: store i32 7, ptr %x call void @callee() call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %return return: ret void } ; CHECK-LABEL: define void @test6c( ; CHECK: entry: ; CHECK: tail call ptr @llvm.objc.retain ; CHECK: t: ; CHECK: call void @llvm.objc.release ; CHECK: f: ; CHECK: call void @llvm.objc.release ; CHECK: return: ; CHECK: {{^}}} define void @test6c(ptr %x, i1 %p) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %t, label %f t: store i8 3, ptr %x store float 2.0, ptr %x call void @llvm.objc.release(ptr %x) nounwind br label %return f: store i32 7, ptr %x call void @callee() call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %return return: ret void } ; CHECK-LABEL: define void @test6d( ; CHECK: entry: ; CHECK: tail call ptr @llvm.objc.retain ; CHECK: t: ; CHECK: call void @llvm.objc.release ; CHECK: f: ; CHECK: call void @llvm.objc.release ; CHECK: return: ; CHECK: {{^}}} define void @test6d(ptr %x, i1 %p) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %p, label %t, label %f t: store i8 3, ptr %x store float 2.0, ptr %x call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %return f: store i32 7, ptr %x call void @callee() call void @llvm.objc.release(ptr %x) nounwind br label %return return: ret void } ; retain+release pair deletion, where the retain happens on two different ; flow paths. ; CHECK-LABEL: define void @test7( ; CHECK: entry: ; CHECK-NOT: llvm.objc. ; CHECK: t: ; CHECK: call ptr @llvm.objc.retain ; CHECK: f: ; CHECK: call ptr @llvm.objc.retain ; CHECK: return: ; CHECK: call void @llvm.objc.release ; CHECK: {{^}}} define void @test7(ptr %x, i1 %p) nounwind { entry: br i1 %p, label %t, label %f t: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind store i8 3, ptr %x store float 2.0, ptr %x br label %return f: %1 = call ptr @llvm.objc.retain(ptr %x) nounwind store i32 7, ptr %x call void @callee() br label %return return: call void @llvm.objc.release(ptr %x) nounwind ret void } ; CHECK-LABEL: define void @test7b( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test7b(ptr %x, i1 %p) nounwind { entry: br i1 %p, label %t, label %f t: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind store i8 3, ptr %x store float 2.0, ptr %x br label %return f: %1 = call ptr @llvm.objc.retain(ptr %x) nounwind store i32 7, ptr %x call void @callee() br label %return return: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 ret void } ; Like test7, but there's a retain/retainBlock mismatch. Don't delete! ; CHECK-LABEL: define void @test7c( ; CHECK: t: ; CHECK: call ptr @llvm.objc.retainBlock ; CHECK: f: ; CHECK: call ptr @llvm.objc.retain ; CHECK: return: ; CHECK: call void @llvm.objc.release ; CHECK: {{^}}} define void @test7c(ptr %x, i1 %p) nounwind { entry: br i1 %p, label %t, label %f t: %0 = call ptr @llvm.objc.retainBlock(ptr %x) nounwind store i8 3, ptr %x store float 2.0, ptr %x br label %return f: %1 = call ptr @llvm.objc.retain(ptr %x) nounwind store i32 7, ptr %x call void @callee() br label %return return: call void @llvm.objc.release(ptr %x) nounwind ret void } ; retain+release pair deletion, where the retain and release both happen on ; different flow paths. Wild! ; CHECK-LABEL: define void @test8a( ; CHECK: entry: ; CHECK: t: ; CHECK: @llvm.objc.retain ; CHECK: f: ; CHECK: @llvm.objc.retain ; CHECK: mid: ; CHECK: u: ; CHECK: @llvm.objc.release ; CHECK: g: ; CHECK: @llvm.objc.release ; CHECK: return: ; CHECK: {{^}}} define void @test8a(ptr %x, i1 %p, i1 %q) nounwind { entry: br i1 %p, label %t, label %f t: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind store i8 3, ptr %x store float 2.0, ptr %x br label %mid f: %1 = call ptr @llvm.objc.retain(ptr %x) nounwind store i32 7, ptr %x br label %mid mid: br i1 %q, label %u, label %g u: call void @callee() call void @llvm.objc.release(ptr %x) nounwind br label %return g: call void @llvm.objc.release(ptr %x) nounwind br label %return return: ret void } ; CHECK-LABEL: define void @test8b( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test8b(ptr %x, i1 %p, i1 %q) nounwind { entry: br i1 %p, label %t, label %f t: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind store i8 3, ptr %x store float 2.0, ptr %x br label %mid f: %1 = call ptr @llvm.objc.retain(ptr %x) nounwind store i32 7, ptr %x br label %mid mid: br i1 %q, label %u, label %g u: call void @callee() call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %return g: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %return return: ret void } ; CHECK-LABEL: define void @test8c( ; CHECK: entry: ; CHECK: t: ; CHECK-NOT: @llvm.objc. ; CHECK: f: ; CHECK-NOT: @llvm.objc. ; CHECK: mid: ; CHECK: u: ; CHECK: @llvm.objc.retain ; CHECK: @llvm.objc.release ; CHECK: g: ; CHECK-NOT: @llvm.objc. ; CHECK: return: ; CHECK: {{^}}} define void @test8c(ptr %x, i1 %p, i1 %q) nounwind { entry: br i1 %p, label %t, label %f t: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind store i8 3, ptr %x store float 2.0, ptr %x br label %mid f: %1 = call ptr @llvm.objc.retain(ptr %x) nounwind store i32 7, ptr %x br label %mid mid: br i1 %q, label %u, label %g u: call void @callee() call void @llvm.objc.release(ptr %x) nounwind br label %return g: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %return return: ret void } ; CHECK-LABEL: define void @test8d( ; CHECK: entry: ; CHECK: t: ; CHECK: @llvm.objc.retain ; CHECK: f: ; CHECK: @llvm.objc.retain ; CHECK: mid: ; CHECK: u: ; CHECK: @llvm.objc.release ; CHECK: g: ; CHECK: @llvm.objc.release ; CHECK: return: ; CHECK: {{^}}} define void @test8d(ptr %x, i1 %p, i1 %q) nounwind { entry: br i1 %p, label %t, label %f t: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind store i8 3, ptr %x store float 2.0, ptr %x br label %mid f: %1 = call ptr @llvm.objc.retain(ptr %x) nounwind store i32 7, ptr %x br label %mid mid: br i1 %q, label %u, label %g u: call void @callee() call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %return g: call void @llvm.objc.release(ptr %x) nounwind br label %return return: ret void } ; Trivial retain+release pair deletion. ; CHECK-LABEL: define void @test9( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test9(ptr %x) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind call void @llvm.objc.release(ptr %0) nounwind ret void } ; Retain+release pair, but on an unknown pointer relationship. Don't delete! ; CHECK-LABEL: define void @test9b( ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK: @llvm.objc.release(ptr %s) ; CHECK: {{^}}} define void @test9b(ptr %x, i1 %j, ptr %p) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind %s = select i1 %j, ptr %x, ptr %p call void @llvm.objc.release(ptr %s) nounwind ret void } ; Trivial retain+release pair with intervening calls - don't delete! ; CHECK-LABEL: define void @test10( ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK: @callee ; CHECK: @use_pointer ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test10(ptr %x) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind call void @callee() call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %0) nounwind ret void } ; Trivial retain+autoreleaserelease pair. Don't delete! ; Also, add a tail keyword, since llvm.objc.retain can never be passed ; a stack argument. ; CHECK-LABEL: define void @test11( ; CHECK: tail call ptr @llvm.objc.retain(ptr %x) [[NUW]] ; CHECK: call ptr @llvm.objc.autorelease(ptr %0) [[NUW]] ; CHECK: {{^}}} define void @test11(ptr %x) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.autorelease(ptr %0) nounwind call void @use_pointer(ptr %x) ret void } ; Same as test11 but with no use_pointer call. Delete the pair! ; CHECK-LABEL: define void @test11a( ; CHECK: entry: ; CHECK-NEXT: ret void ; CHECK: {{^}}} define void @test11a(ptr %x) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.autorelease(ptr %0) nounwind ret void } ; Same as test11 but the value is returned. Do not perform an RV optimization ; since if the frontend emitted code for an __autoreleasing variable, we may ; want it to be in the autorelease pool. ; CHECK-LABEL: define ptr @test11b( ; CHECK: tail call ptr @llvm.objc.retain(ptr %x) [[NUW]] ; CHECK: call ptr @llvm.objc.autorelease(ptr %0) [[NUW]] ; CHECK: {{^}}} define ptr @test11b(ptr %x) nounwind { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.autorelease(ptr %0) nounwind ret ptr %x } ; We can not delete this retain, release since we do not have a post-dominating ; use of the release. ; CHECK-LABEL: define void @test12( ; CHECK-NEXT: entry: ; CHECK-NEXT: @llvm.objc.retain(ptr %x) ; CHECK-NEXT: @llvm.objc.retain ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test12(ptr %x, i64 %n) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind ret void } ; Trivial retain,autorelease pair. Don't delete! ; CHECK-LABEL: define void @test13( ; CHECK: tail call ptr @llvm.objc.retain(ptr %x) [[NUW]] ; CHECK: tail call ptr @llvm.objc.retain(ptr %x) [[NUW]] ; CHECK: @use_pointer(ptr %x) ; CHECK: call ptr @llvm.objc.autorelease(ptr %x) [[NUW]] ; CHECK: {{^}}} define void @test13(ptr %x, i64 %n) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call ptr @llvm.objc.autorelease(ptr %x) nounwind ret void } ; Delete the retain+release pair. ; CHECK-LABEL: define void @test13b( ; CHECK-NEXT: entry: ; CHECK-NEXT: @llvm.objc.retain(ptr %x) ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @llvm.objc.release ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test13b(ptr %x, i64 %n) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind ret void } ; Don't delete the retain+release pair because there's an ; autoreleasePoolPop in the way. ; CHECK-LABEL: define void @test13c( ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK: @llvm.objc.autoreleasePoolPop ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK: @use_pointer ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test13c(ptr %x, i64 %n) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call void @llvm.objc.autoreleasePoolPop(ptr undef) call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind ret void } ; Like test13c, but there's an autoreleasePoolPush in the way, but that ; doesn't matter. ; CHECK-LABEL: define void @test13d( ; CHECK-NEXT: entry: ; CHECK-NEXT: @llvm.objc.retain(ptr %x) ; CHECK-NEXT: @llvm.objc.autoreleasePoolPush ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @llvm.objc.release ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test13d(ptr %x, i64 %n) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.autoreleasePoolPush() call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind ret void } ; Trivial retain,release pair with intervening call, and it's post-dominated by ; another release. But it is not known safe in the top down direction. We can ; not eliminate it. ; CHECK-LABEL: define void @test14( ; CHECK-NEXT: entry: ; CHECK-NEXT: @llvm.objc.retain ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @llvm.objc.release ; CHECK-NEXT: @llvm.objc.release ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test14(ptr %x, i64 %n) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind call void @llvm.objc.release(ptr %x) nounwind ret void } ; Trivial retain,autorelease pair with intervening call, but it's post-dominated ; by another release. Don't delete anything. ; CHECK-LABEL: define void @test15( ; CHECK-NEXT: entry: ; CHECK-NEXT: @llvm.objc.retain(ptr %x) ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @llvm.objc.autorelease(ptr %x) ; CHECK-NEXT: @llvm.objc.release ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test15(ptr %x, i64 %n) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call ptr @llvm.objc.autorelease(ptr %x) nounwind call void @llvm.objc.release(ptr %x) nounwind ret void } ; Trivial retain,autorelease pair, post-dominated ; by another release. Delete the retain and release. ; CHECK-LABEL: define void @test15b( ; CHECK-NEXT: entry: ; CHECK-NEXT: @llvm.objc.retain ; CHECK-NEXT: @llvm.objc.autorelease ; CHECK-NEXT: @llvm.objc.release ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test15b(ptr %x, i64 %n) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.autorelease(ptr %x) nounwind call void @llvm.objc.release(ptr %x) nounwind ret void } ; CHECK-LABEL: define void @test15c( ; CHECK-NEXT: entry: ; CHECK-NEXT: @llvm.objc.autorelease ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test15c(ptr %x, i64 %n) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.autorelease(ptr %x) nounwind call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 ret void } ; Retain+release pairs in diamonds, all dominated by a retain. ; CHECK-LABEL: define void @test16a( ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK-NOT: @objc ; CHECK: purple: ; CHECK: @use_pointer ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test16a(i1 %a, i1 %b, ptr %x) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %a, label %red, label %orange red: call ptr @llvm.objc.retain(ptr %x) nounwind br label %yellow orange: call ptr @llvm.objc.retain(ptr %x) nounwind br label %yellow yellow: call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) br i1 %b, label %green, label %blue green: call void @llvm.objc.release(ptr %x) nounwind br label %purple blue: call void @llvm.objc.release(ptr %x) nounwind br label %purple purple: call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind ret void } ; CHECK-LABEL: define void @test16b( ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK-NOT: @objc ; CHECK: purple: ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @use_pointer ; CHECK-NEXT: @llvm.objc.release ; CHECK: {{^}}} define void @test16b(i1 %a, i1 %b, ptr %x) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %a, label %red, label %orange red: call ptr @llvm.objc.retain(ptr %x) nounwind br label %yellow orange: call ptr @llvm.objc.retain(ptr %x) nounwind br label %yellow yellow: call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) br i1 %b, label %green, label %blue green: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %purple blue: call void @llvm.objc.release(ptr %x) nounwind br label %purple purple: call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind ret void } ; CHECK-LABEL: define void @test16c( ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK-NOT: @objc ; CHECK: purple: ; CHECK: @use_pointer ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test16c(i1 %a, i1 %b, ptr %x) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %a, label %red, label %orange red: call ptr @llvm.objc.retain(ptr %x) nounwind br label %yellow orange: call ptr @llvm.objc.retain(ptr %x) nounwind br label %yellow yellow: call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) br i1 %b, label %green, label %blue green: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %purple blue: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %purple purple: call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 ret void } ; CHECK-LABEL: define void @test16d( ; CHECK: @llvm.objc.retain(ptr %x) ; CHECK: @llvm.objc ; CHECK: {{^}}} define void @test16d(i1 %a, i1 %b, ptr %x) { entry: call ptr @llvm.objc.retain(ptr %x) nounwind br i1 %a, label %red, label %orange red: call ptr @llvm.objc.retain(ptr %x) nounwind br label %yellow orange: call ptr @llvm.objc.retain(ptr %x) nounwind br label %yellow yellow: call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) br i1 %b, label %green, label %blue green: call void @llvm.objc.release(ptr %x) nounwind br label %purple blue: call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 br label %purple purple: ret void } ; Delete no-ops. ; CHECK-LABEL: define void @test18( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test18() { call ptr @llvm.objc.retain(ptr null) call void @llvm.objc.release(ptr null) call ptr @llvm.objc.autorelease(ptr null) ret void } ; Delete no-ops where undef can be assumed to be null. ; CHECK-LABEL: define void @test18b( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test18b() { call ptr @llvm.objc.retain(ptr undef) call void @llvm.objc.release(ptr undef) call ptr @llvm.objc.autorelease(ptr undef) ret void } ; Replace uses of arguments with uses of return values, to reduce ; register pressure. ; CHECK: define void @test19(ptr %y) { ; CHECK: %0 = tail call ptr @llvm.objc.retain(ptr %y) ; CHECK: call void @use_pointer(ptr %y) ; CHECK: call void @use_pointer(ptr %y) ; CHECK: call void @llvm.objc.release(ptr %y) ; CHECK: ret void ; CHECK: {{^}}} define void @test19(ptr %y) { entry: %0 = call ptr @llvm.objc.retain(ptr %y) nounwind call void @use_pointer(ptr %y) call void @use_pointer(ptr %y) call void @llvm.objc.release(ptr %y) ret void } ; Bitcast insertion ; CHECK-LABEL: define void @test20( ; CHECK: %tmp1 = tail call ptr @llvm.objc.retain(ptr %self) [[NUW]] ; CHECK-NEXT: invoke ; CHECK: {{^}}} define void @test20(ptr %self) personality ptr @__gxx_personality_v0 { if.then12: %tmp1 = call ptr @llvm.objc.retain(ptr %self) nounwind invoke void @invokee() to label %invoke.cont23 unwind label %lpad20 invoke.cont23: ; preds = %if.then12 invoke void @invokee() to label %if.end unwind label %lpad20 lpad20: ; preds = %invoke.cont23, %if.then12 %tmp502 = phi ptr [ undef, %invoke.cont23 ], [ %self, %if.then12 ] %exn = landingpad {ptr, i32} cleanup unreachable if.end: ; preds = %invoke.cont23 ret void } ; Delete a redundant retain,autorelease when forwaring a call result ; directly to a return value. ; CHECK-LABEL: define ptr @test21( ; CHECK: call ptr @returner() ; CHECK-NEXT: ret ptr %call ; CHECK-NEXT: } define ptr @test21() { entry: %call = call ptr @returner() %0 = call ptr @llvm.objc.retain(ptr %call) nounwind %1 = call ptr @llvm.objc.autorelease(ptr %0) nounwind ret ptr %1 } ; Move an objc call up through a phi that has null operands. ; CHECK-LABEL: define void @test22( ; CHECK: B: ; CHECK: call void @llvm.objc.release(ptr %p) ; CHECK: br label %C ; CHECK: C: ; preds = %B, %A ; CHECK-NOT: @llvm.objc.release ; CHECK: {{^}}} define void @test22(ptr %p, i1 %a) { br i1 %a, label %A, label %B A: br label %C B: br label %C C: %h = phi ptr [ null, %A ], [ %p, %B ] call void @llvm.objc.release(ptr %h), !clang.imprecise_release !0 ret void } ; Do not move an llvm.objc.release that doesn't have the clang.imprecise_release tag. ; CHECK-LABEL: define void @test22_precise( ; CHECK: %[[P0:.*]] = phi ptr ; CHECK: call void @llvm.objc.release(ptr %[[P0]]) ; CHECK: ret void define void @test22_precise(ptr %p, i1 %a) { br i1 %a, label %A, label %B A: br label %C B: br label %C C: %h = phi ptr [ null, %A ], [ %p, %B ] call void @llvm.objc.release(ptr %h) ret void } ; Any call can decrement a retain count. ; CHECK-LABEL: define void @test24( ; CHECK: @llvm.objc.retain(ptr %a) ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test24(ptr %r, ptr %a) { call ptr @llvm.objc.retain(ptr %a) call void @use_pointer(ptr %r) %q = load i8, ptr %a call void @llvm.objc.release(ptr %a) ret void } ; Don't move a retain/release pair if the release can be moved ; but the retain can't be moved to balance it. ; CHECK-LABEL: define void @test25( ; CHECK: entry: ; CHECK: call ptr @llvm.objc.retain(ptr %p) ; CHECK: true: ; CHECK: done: ; CHECK: call void @llvm.objc.release(ptr %p) ; CHECK: {{^}}} define void @test25(ptr %p, i1 %x) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) call void @callee() br i1 %x, label %true, label %done true: store i8 0, ptr %p br label %done done: call void @llvm.objc.release(ptr %p) ret void } ; Don't move a retain/release pair if the retain can be moved ; but the release can't be moved to balance it. ; CHECK-LABEL: define void @test26( ; CHECK: entry: ; CHECK: call ptr @llvm.objc.retain(ptr %p) ; CHECK: true: ; CHECK: done: ; CHECK: call void @llvm.objc.release(ptr %p) ; CHECK: {{^}}} define void @test26(ptr %p, i1 %x) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: call void @callee() br label %done done: store i8 0, ptr %p call void @llvm.objc.release(ptr %p) ret void } ; Don't sink the retain,release into the loop. ; CHECK-LABEL: define void @test27( ; CHECK: entry: ; CHECK: call ptr @llvm.objc.retain(ptr %p) ; CHECK: loop: ; CHECK-NOT: @llvm.objc. ; CHECK: done: ; CHECK: call void @llvm.objc.release ; CHECK: {{^}}} define void @test27(ptr %p, i1 %x, i1 %y) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %loop, label %done loop: call void @callee() store i8 0, ptr %p br i1 %y, label %done, label %loop done: call void @llvm.objc.release(ptr %p) ret void } ; Trivial code motion case: Triangle. ; CHECK-LABEL: define void @test28( ; CHECK-NOT: @llvm.objc. ; CHECK: true: ; CHECK: call ptr @llvm.objc.retain ; CHECK: call void @callee() ; CHECK: store ; CHECK: call void @llvm.objc.release ; CHECK: done: ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test28(ptr %p, i1 %x) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: call void @callee() store i8 0, ptr %p br label %done done: call void @llvm.objc.release(ptr %p), !clang.imprecise_release !0 ret void } ; Trivial code motion case: Triangle, but no metadata. Don't move past ; unrelated memory references! ; CHECK-LABEL: define void @test28b( ; CHECK: call ptr @llvm.objc.retain ; CHECK: true: ; CHECK-NOT: @llvm.objc. ; CHECK: call void @callee() ; CHECK-NOT: @llvm.objc. ; CHECK: store ; CHECK-NOT: @llvm.objc. ; CHECK: done: ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test28b(ptr %p, i1 %x, ptr noalias %t) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: call void @callee() store i8 0, ptr %p br label %done done: store i8 0, ptr %t call void @llvm.objc.release(ptr %p) ret void } ; Trivial code motion case: Triangle, with metadata. Do move past ; unrelated memory references! And preserve the metadata. ; CHECK-LABEL: define void @test28c( ; CHECK-NOT: @llvm.objc. ; CHECK: true: ; CHECK: call ptr @llvm.objc.retain ; CHECK: call void @callee() ; CHECK: store ; CHECK: call void @llvm.objc.release(ptr %p) [[NUW]], !clang.imprecise_release ; CHECK: done: ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test28c(ptr %p, i1 %x, ptr noalias %t) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: call void @callee() store i8 0, ptr %p br label %done done: store i8 0, ptr %t call void @llvm.objc.release(ptr %p), !clang.imprecise_release !0 ret void } ; Like test28. but with two releases. ; CHECK-LABEL: define void @test29( ; CHECK: call ptr @llvm.objc.retain ; CHECK: true: ; CHECK: call void @callee() ; CHECK: store ; CHECK: done: ; CHECK: call void @llvm.objc.release ; CHECK: ohno: ; CHECK: call void @llvm.objc.release ; CHECK: {{^}}} define void @test29(ptr %p, i1 %x, i1 %y) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: call void @callee() store i8 0, ptr %p br i1 %y, label %done, label %ohno done: call void @llvm.objc.release(ptr %p) ret void ohno: call void @llvm.objc.release(ptr %p) ret void } ; Basic case with the use and call in a diamond ; with an extra release. ; CHECK-LABEL: define void @test30( ; CHECK: call ptr @llvm.objc.retain ; CHECK: true: ; CHECK: call void @callee() ; CHECK: store ; CHECK: false: ; CHECK: done: ; CHECK: call void @llvm.objc.release ; CHECK: ohno: ; CHECK: call void @llvm.objc.release ; CHECK: {{^}}} define void @test30(ptr %p, i1 %x, i1 %y, i1 %z) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %false true: call void @callee() store i8 0, ptr %p br i1 %y, label %done, label %ohno false: br i1 %z, label %done, label %ohno done: call void @llvm.objc.release(ptr %p) ret void ohno: call void @llvm.objc.release(ptr %p) ret void } ; Basic case with a mergeable release. ; CHECK-LABEL: define void @test31( ; CHECK: call ptr @llvm.objc.retain(ptr %p) ; CHECK: call void @callee() ; CHECK: store ; CHECK: true: ; CHECK: call void @llvm.objc.release ; CHECK: false: ; CHECK: call void @llvm.objc.release ; CHECK: ret void ; CHECK: {{^}}} define void @test31(ptr %p, i1 %x) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) call void @callee() store i8 0, ptr %p br i1 %x, label %true, label %false true: call void @llvm.objc.release(ptr %p) ret void false: call void @llvm.objc.release(ptr %p) ret void } ; Don't consider bitcasts or getelementptrs direct uses. ; CHECK-LABEL: define void @test32( ; CHECK: call ptr @llvm.objc.retain ; CHECK: true: ; CHECK: call void @callee() ; CHECK: store ; CHECK: done: ; CHECK: call void @llvm.objc.release ; CHECK: {{^}}} define void @test32(ptr %p, i1 %x) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: call void @callee() store i8 0, ptr %p br label %done done: call void @llvm.objc.release(ptr %p) ret void } ; Do consider icmps to be direct uses. ; CHECK-LABEL: define void @test33( ; CHECK: call ptr @llvm.objc.retain ; CHECK: true: ; CHECK: call void @callee() ; CHECK: icmp ; CHECK: done: ; CHECK: call void @llvm.objc.release ; CHECK: {{^}}} define void @test33(ptr %p, i1 %x, ptr %y) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: call void @callee() %v = icmp eq ptr %p, %y br label %done done: call void @llvm.objc.release(ptr %p) ret void } ; Delete retain,release if there's just a possible dec and we have imprecise ; releases. ; CHECK-LABEL: define void @test34a( ; CHECK: call ptr @llvm.objc.retain ; CHECK: true: ; CHECK: done: ; CHECK: call void @llvm.objc.release ; CHECK: {{^}}} define void @test34a(ptr %p, i1 %x, ptr %y) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: call void @callee() br label %done done: call void @llvm.objc.release(ptr %p) ret void } ; CHECK-LABEL: define void @test34b( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test34b(ptr %p, i1 %x, ptr %y) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: call void @callee() br label %done done: call void @llvm.objc.release(ptr %p), !clang.imprecise_release !0 ret void } ; Delete retain,release if there's just a use and we do not have a precise ; release. ; Precise. ; CHECK-LABEL: define void @test35a( ; CHECK: entry: ; CHECK: call ptr @llvm.objc.retain ; CHECK: true: ; CHECK: done: ; CHECK: call void @llvm.objc.release ; CHECK: {{^}}} define void @test35a(ptr %p, i1 %x, ptr %y) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: %v = icmp eq ptr %p, %y br label %done done: call void @llvm.objc.release(ptr %p) ret void } ; Imprecise. ; CHECK-LABEL: define void @test35b( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test35b(ptr %p, i1 %x, ptr %y) { entry: %f0 = call ptr @llvm.objc.retain(ptr %p) br i1 %x, label %true, label %done true: %v = icmp eq ptr %p, %y br label %done done: call void @llvm.objc.release(ptr %p), !clang.imprecise_release !0 ret void } ; Delete a retain,release if there's no actual use and we have precise release. ; CHECK-LABEL: define void @test36a( ; CHECK: @llvm.objc.retain ; CHECK: call void @callee() ; CHECK-NOT: @llvm.objc. ; CHECK: call void @callee() ; CHECK: @llvm.objc.release ; CHECK: {{^}}} define void @test36a(ptr %p) { entry: call ptr @llvm.objc.retain(ptr %p) call void @callee() call void @callee() call void @llvm.objc.release(ptr %p) ret void } ; Like test36, but with metadata. ; CHECK-LABEL: define void @test36b( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test36b(ptr %p) { entry: call ptr @llvm.objc.retain(ptr %p) call void @callee() call void @callee() call void @llvm.objc.release(ptr %p), !clang.imprecise_release !0 ret void } ; Be aggressive about analyzing phis to eliminate possible uses. ; CHECK-LABEL: define void @test38( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test38(ptr %p, i1 %u, i1 %m, ptr %z, ptr %y, ptr %x, ptr %w) { entry: call ptr @llvm.objc.retain(ptr %p) br i1 %u, label %true, label %false true: br i1 %m, label %a, label %b false: br i1 %m, label %c, label %d a: br label %e b: br label %e c: br label %f d: br label %f e: %j = phi ptr [ %z, %a ], [ %y, %b ] br label %g f: %k = phi ptr [ %w, %c ], [ %x, %d ] br label %g g: %h = phi ptr [ %j, %e ], [ %k, %f ] call void @use_pointer(ptr %h) call void @llvm.objc.release(ptr %p), !clang.imprecise_release !0 ret void } ; Delete retain,release pairs around loops. ; CHECK-LABEL: define void @test39( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test39(ptr %p) { entry: %0 = call ptr @llvm.objc.retain(ptr %p) br label %loop loop: ; preds = %loop, %entry br i1 undef, label %loop, label %exit exit: ; preds = %loop call void @llvm.objc.release(ptr %0), !clang.imprecise_release !0 ret void } ; Delete retain,release pairs around loops containing uses. ; CHECK-LABEL: define void @test39b( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test39b(ptr %p) { entry: %0 = call ptr @llvm.objc.retain(ptr %p) br label %loop loop: ; preds = %loop, %entry store i8 0, ptr %0 br i1 undef, label %loop, label %exit exit: ; preds = %loop call void @llvm.objc.release(ptr %0), !clang.imprecise_release !0 ret void } ; Delete retain,release pairs around loops containing potential decrements. ; CHECK-LABEL: define void @test39c( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test39c(ptr %p) { entry: %0 = call ptr @llvm.objc.retain(ptr %p) br label %loop loop: ; preds = %loop, %entry call void @use_pointer(ptr %0) br i1 undef, label %loop, label %exit exit: ; preds = %loop call void @llvm.objc.release(ptr %0), !clang.imprecise_release !0 ret void } ; Delete retain,release pairs around loops even if ; the successors are in a different order. ; CHECK-LABEL: define void @test40( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test40(ptr %p) { entry: %0 = call ptr @llvm.objc.retain(ptr %p) br label %loop loop: ; preds = %loop, %entry call void @use_pointer(ptr %0) br i1 undef, label %exit, label %loop exit: ; preds = %loop call void @llvm.objc.release(ptr %0), !clang.imprecise_release !0 ret void } ; Do the known-incremented retain+release elimination even if the pointer ; is also autoreleased. ; CHECK-LABEL: define void @test42( ; CHECK-NEXT: entry: ; CHECK-NEXT: call ptr @llvm.objc.retain(ptr %p) ; CHECK-NEXT: call ptr @llvm.objc.autorelease(ptr %p) ; CHECK-NEXT: call void @use_pointer(ptr %p) ; CHECK-NEXT: call void @use_pointer(ptr %p) ; CHECK-NEXT: call void @use_pointer(ptr %p) ; CHECK-NEXT: call void @use_pointer(ptr %p) ; CHECK-NEXT: call void @llvm.objc.release(ptr %p) ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test42(ptr %p) { entry: call ptr @llvm.objc.retain(ptr %p) call ptr @llvm.objc.autorelease(ptr %p) call ptr @llvm.objc.retain(ptr %p) call void @use_pointer(ptr %p) call void @use_pointer(ptr %p) call void @llvm.objc.release(ptr %p) call void @use_pointer(ptr %p) call void @use_pointer(ptr %p) call void @llvm.objc.release(ptr %p) ret void } ; Don't the known-incremented retain+release elimination if the pointer is ; autoreleased and there's an autoreleasePoolPop. ; CHECK-LABEL: define void @test43( ; CHECK-NEXT: entry: ; CHECK-NEXT: call ptr @llvm.objc.retain(ptr %p) ; CHECK-NEXT: call ptr @llvm.objc.autorelease(ptr %p) ; CHECK-NEXT: call ptr @llvm.objc.retain ; CHECK-NEXT: call void @use_pointer(ptr %p) ; CHECK-NEXT: call void @use_pointer(ptr %p) ; CHECK-NEXT: call void @llvm.objc.autoreleasePoolPop(ptr undef) ; CHECK-NEXT: call void @llvm.objc.release ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test43(ptr %p) { entry: call ptr @llvm.objc.retain(ptr %p) call ptr @llvm.objc.autorelease(ptr %p) call ptr @llvm.objc.retain(ptr %p) call void @use_pointer(ptr %p) call void @use_pointer(ptr %p) call void @llvm.objc.autoreleasePoolPop(ptr undef) call void @llvm.objc.release(ptr %p) ret void } ; Do the known-incremented retain+release elimination if the pointer is ; autoreleased and there's an autoreleasePoolPush. ; CHECK-LABEL: define void @test43b( ; CHECK-NEXT: entry: ; CHECK-NEXT: call ptr @llvm.objc.retain(ptr %p) ; CHECK-NEXT: call ptr @llvm.objc.autorelease(ptr %p) ; CHECK-NEXT: call void @use_pointer(ptr %p) ; CHECK-NEXT: call void @use_pointer(ptr %p) ; CHECK-NEXT: call ptr @llvm.objc.autoreleasePoolPush() ; CHECK-NEXT: call void @use_pointer(ptr %p) ; CHECK-NEXT: call void @llvm.objc.release ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test43b(ptr %p) { entry: call ptr @llvm.objc.retain(ptr %p) call ptr @llvm.objc.autorelease(ptr %p) call ptr @llvm.objc.retain(ptr %p) call void @use_pointer(ptr %p) call void @use_pointer(ptr %p) call ptr @llvm.objc.autoreleasePoolPush() call void @llvm.objc.release(ptr %p) call void @use_pointer(ptr %p) call void @llvm.objc.release(ptr %p) ret void } ; Do retain+release elimination for non-provenance pointers. ; CHECK-LABEL: define void @test44( ; CHECK-NOT: llvm.objc. ; CHECK: {{^}}} define void @test44(ptr %pp) { %p = load ptr, ptr %pp %q = call ptr @llvm.objc.retain(ptr %p) call void @llvm.objc.release(ptr %q) ret void } ; Don't delete retain+release with an unknown-provenance ; may-alias llvm.objc.release between them. ; CHECK-LABEL: define void @test45( ; CHECK: call ptr @llvm.objc.retain(ptr %p) ; CHECK: call void @llvm.objc.release(ptr %q) ; CHECK: call void @use_pointer(ptr %p) ; CHECK: call void @llvm.objc.release(ptr %p) ; CHECK: {{^}}} define void @test45(ptr %pp, ptr %qq) { %p = load ptr, ptr %pp %q = load ptr, ptr %qq call ptr @llvm.objc.retain(ptr %p) call void @llvm.objc.release(ptr %q) call void @use_pointer(ptr %p) call void @llvm.objc.release(ptr %p) ret void } ; Don't delete retain and autorelease here. ; CHECK-LABEL: define void @test46( ; CHECK: tail call ptr @llvm.objc.retain(ptr %p) [[NUW]] ; CHECK: true: ; CHECK: call ptr @llvm.objc.autorelease(ptr %p) [[NUW]] ; CHECK: {{^}}} define void @test46(ptr %p, i1 %a) { entry: call ptr @llvm.objc.retain(ptr %p) br i1 %a, label %true, label %false true: call ptr @llvm.objc.autorelease(ptr %p) call void @use_pointer(ptr %p) ret void false: ret void } ; Delete no-op cast calls. ; CHECK-LABEL: define ptr @test47( ; CHECK-NOT: call ; CHECK: ret ptr %p ; CHECK: {{^}}} define ptr @test47(ptr %p) nounwind { %x = call ptr @llvm.objc.retainedObject(ptr %p) ret ptr %x } ; Delete no-op cast calls. ; CHECK-LABEL: define ptr @test48( ; CHECK-NOT: call ; CHECK: ret ptr %p ; CHECK: {{^}}} define ptr @test48(ptr %p) nounwind { %x = call ptr @llvm.objc.unretainedObject(ptr %p) ret ptr %x } ; Delete no-op cast calls. ; CHECK-LABEL: define ptr @test49( ; CHECK-NOT: call ; CHECK: ret ptr %p ; CHECK: {{^}}} define ptr @test49(ptr %p) nounwind { %x = call ptr @llvm.objc.unretainedPointer(ptr %p) ret ptr %x } ; Do delete retain+release with intervening stores of the address value if we ; have imprecise release attached to llvm.objc.release. ; CHECK-LABEL: define void @test50a( ; CHECK-NEXT: call ptr @llvm.objc.retain ; CHECK-NEXT: call void @callee ; CHECK-NEXT: store ; CHECK-NEXT: call void @llvm.objc.release ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test50a(ptr %p, ptr %pp) { call ptr @llvm.objc.retain(ptr %p) call void @callee() store ptr %p, ptr %pp call void @llvm.objc.release(ptr %p) ret void } ; CHECK-LABEL: define void @test50b( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test50b(ptr %p, ptr %pp) { call ptr @llvm.objc.retain(ptr %p) call void @callee() store ptr %p, ptr %pp call void @llvm.objc.release(ptr %p), !clang.imprecise_release !0 ret void } ; Don't delete retain+release with intervening stores through the ; address value. ; CHECK-LABEL: define void @test51a( ; CHECK: call ptr @llvm.objc.retain(ptr %p) ; CHECK: call void @llvm.objc.release(ptr %p) ; CHECK: ret void ; CHECK: {{^}}} define void @test51a(ptr %p) { call ptr @llvm.objc.retain(ptr %p) call void @callee() store i8 0, ptr %p call void @llvm.objc.release(ptr %p) ret void } ; CHECK-LABEL: define void @test51b( ; CHECK: call ptr @llvm.objc.retain(ptr %p) ; CHECK: call void @llvm.objc.release(ptr %p) ; CHECK: ret void ; CHECK: {{^}}} define void @test51b(ptr %p) { call ptr @llvm.objc.retain(ptr %p) call void @callee() store i8 0, ptr %p call void @llvm.objc.release(ptr %p), !clang.imprecise_release !0 ret void } ; Don't delete retain+release with intervening use of a pointer of ; unknown provenance. ; CHECK-LABEL: define void @test52a( ; CHECK: call ptr @llvm.objc.retain ; CHECK: call void @callee() ; CHECK: call void @use_pointer(ptr %z) ; CHECK: call void @llvm.objc.release ; CHECK: ret void ; CHECK: {{^}}} define void @test52a(ptr %zz, ptr %pp) { %p = load ptr, ptr %pp %1 = call ptr @llvm.objc.retain(ptr %p) call void @callee() %z = load ptr, ptr %zz call void @use_pointer(ptr %z) call void @llvm.objc.release(ptr %p) ret void } ; CHECK-LABEL: define void @test52b( ; CHECK: call ptr @llvm.objc.retain ; CHECK: call void @callee() ; CHECK: call void @use_pointer(ptr %z) ; CHECK: call void @llvm.objc.release ; CHECK: ret void ; CHECK: {{^}}} define void @test52b(ptr %zz, ptr %pp) { %p = load ptr, ptr %pp %1 = call ptr @llvm.objc.retain(ptr %p) call void @callee() %z = load ptr, ptr %zz call void @use_pointer(ptr %z) call void @llvm.objc.release(ptr %p), !clang.imprecise_release !0 ret void } ; Like test52, but the pointer has function type, so it's assumed to ; be not reference counted. ; Oops. That's wrong. Clang sometimes uses function types gratuitously. ; See rdar://10551239. ; CHECK-LABEL: define void @test53( ; CHECK: @llvm.objc. ; CHECK: {{^}}} define void @test53(ptr %zz, ptr %pp) { %p = load ptr, ptr %pp %1 = call ptr @llvm.objc.retain(ptr %p) call void @callee() %z = load ptr, ptr %zz call void @callee_fnptr(ptr %z) call void @llvm.objc.release(ptr %p) ret void } ; Convert autorelease to release if the value is unused. ; CHECK-LABEL: define void @test54( ; CHECK: call ptr @returner() ; CHECK-NEXT: call void @llvm.objc.release(ptr %t) [[NUW]], !clang.imprecise_release ![[RELEASE]] ; CHECK-NEXT: ret void ; CHECK: {{^}}} define void @test54() { %t = call ptr @returner() call ptr @llvm.objc.autorelease(ptr %t) ret void } ; Nested retain+release pairs. Delete them both. ; CHECK-LABEL: define void @test55( ; CHECK-NOT: @objc ; CHECK: {{^}}} define void @test55(ptr %x) { entry: %0 = call ptr @llvm.objc.retain(ptr %x) nounwind %1 = call ptr @llvm.objc.retain(ptr %x) nounwind call void @llvm.objc.release(ptr %x) nounwind call void @llvm.objc.release(ptr %x) nounwind ret void } ; Nested retain+release pairs where the inner pair depends ; on the outer pair to be removed, and then the outer pair ; can be partially eliminated. Plus an extra outer pair to ; eliminate, for fun. ; CHECK-LABEL: define void @test56( ; CHECK-NOT: @objc ; CHECK: if.then: ; CHECK-NEXT: %0 = tail call ptr @llvm.objc.retain(ptr %x) [[NUW]] ; CHECK-NEXT: tail call void @use_pointer(ptr %x) ; CHECK-NEXT: tail call void @use_pointer(ptr %x) ; CHECK-NEXT: tail call void @llvm.objc.release(ptr %x) [[NUW]], !clang.imprecise_release ![[RELEASE]] ; CHECK-NEXT: br label %if.end ; CHECK-NOT: @objc ; CHECK: {{^}}} define void @test56(ptr %x, i32 %n) { entry: %0 = tail call ptr @llvm.objc.retain(ptr %x) nounwind %1 = tail call ptr @llvm.objc.retain(ptr %0) nounwind %tobool = icmp eq i32 %n, 0 br i1 %tobool, label %if.end, label %if.then if.then: ; preds = %entry %2 = tail call ptr @llvm.objc.retain(ptr %1) nounwind tail call void @use_pointer(ptr %2) tail call void @use_pointer(ptr %2) tail call void @llvm.objc.release(ptr %2) nounwind, !clang.imprecise_release !0 br label %if.end if.end: ; preds = %entry, %if.then tail call void @llvm.objc.release(ptr %1) nounwind, !clang.imprecise_release !0 tail call void @llvm.objc.release(ptr %0) nounwind, !clang.imprecise_release !0 ret void } ; When there are adjacent retain+release pairs, the first one is known ; unnecessary because the presence of the second one means that the first one ; won't be deleting the object. ; CHECK-LABEL: define void @test57( ; CHECK-NEXT: entry: ; CHECK-NEXT: tail call ptr @llvm.objc.retain(ptr %x) [[NUW]] ; CHECK-NEXT: call void @use_pointer(ptr %x) ; CHECK-NEXT: call void @use_pointer(ptr %x) ; CHECK-NEXT: tail call ptr @llvm.objc.retain(ptr %x) [[NUW]] ; CHECK-NEXT: call void @use_pointer(ptr %x) ; CHECK-NEXT: call void @use_pointer(ptr %x) ; CHECK-NEXT: call void @llvm.objc.release(ptr %x) [[NUW]] ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test57(ptr %x) nounwind { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind ret void } ; An adjacent retain+release pair is sufficient even if it will be ; removed itself. ; CHECK-LABEL: define void @test58( ; CHECK-NEXT: entry: ; CHECK-NEXT: @llvm.objc.retain ; CHECK-NEXT: call void @use_pointer(ptr %x) ; CHECK-NEXT: call void @use_pointer(ptr %x) ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test58(ptr %x) nounwind { entry: call ptr @llvm.objc.retain(ptr %x) nounwind call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind call ptr @llvm.objc.retain(ptr %x) nounwind call void @llvm.objc.release(ptr %x) nounwind ret void } ; Don't delete the second retain+release pair in an adjacent set. ; CHECK-LABEL: define void @test59( ; CHECK-NEXT: entry: ; CHECK-NEXT: %0 = tail call ptr @llvm.objc.retain(ptr %x) [[NUW]] ; CHECK-NEXT: call void @use_pointer(ptr %x) ; CHECK-NEXT: call void @use_pointer(ptr %x) ; CHECK-NEXT: call void @llvm.objc.release(ptr %x) [[NUW]] ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test59(ptr %x) nounwind { entry: %a = call ptr @llvm.objc.retain(ptr %x) nounwind call void @llvm.objc.release(ptr %x) nounwind %b = call ptr @llvm.objc.retain(ptr %x) nounwind call void @use_pointer(ptr %x) call void @use_pointer(ptr %x) call void @llvm.objc.release(ptr %x) nounwind ret void } ; Constant pointers to objects don't need reference counting. @constptr = external constant ptr @something = external global ptr ; We have a precise lifetime retain/release here. We can not remove them since ; @something is not constant. ; CHECK-LABEL: define void @test60a( ; CHECK: call ptr @llvm.objc.retain ; CHECK: call void @llvm.objc.release ; CHECK: {{^}}} define void @test60a() { %t = load ptr, ptr @constptr %s = load ptr, ptr @something call ptr @llvm.objc.retain(ptr %s) call void @callee() call void @use_pointer(ptr %t) call void @llvm.objc.release(ptr %s) ret void } ; CHECK-LABEL: define void @test60b( ; CHECK: call ptr @llvm.objc.retain ; CHECK-NOT: call ptr @llvm.objc.retain ; CHECK-NOT: call ptr @llvm.objc.release ; CHECK: {{^}}} define void @test60b() { %t = load ptr, ptr @constptr %s = load ptr, ptr @something call ptr @llvm.objc.retain(ptr %t) call ptr @llvm.objc.retain(ptr %t) call void @callee() call void @use_pointer(ptr %s) call void @llvm.objc.release(ptr %t) ret void } ; CHECK-LABEL: define void @test60c( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test60c() { %t = load ptr, ptr @constptr %s = load ptr, ptr @something call ptr @llvm.objc.retain(ptr %t) call void @callee() call void @use_pointer(ptr %s) call void @llvm.objc.release(ptr %t), !clang.imprecise_release !0 ret void } ; CHECK-LABEL: define void @test60d( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test60d() { %t = load ptr, ptr @constptr %s = load ptr, ptr @something call ptr @llvm.objc.retain(ptr %t) call void @callee() call void @use_pointer(ptr %s) call void @llvm.objc.release(ptr %t) ret void } ; CHECK-LABEL: define void @test60e( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test60e() { %t = load ptr, ptr @constptr %s = load ptr, ptr @something call ptr @llvm.objc.retain(ptr %t) call void @callee() call void @use_pointer(ptr %s) call void @llvm.objc.release(ptr %t), !clang.imprecise_release !0 ret void } ; Constant pointers to objects don't need to be considered related to other ; pointers. ; CHECK-LABEL: define void @test61( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test61() { %t = load ptr, ptr @constptr call ptr @llvm.objc.retain(ptr %t) call void @callee() call void @use_pointer(ptr %t) call void @llvm.objc.release(ptr %t) ret void } ; Delete a retain matched by releases when one is inside the loop and the ; other is outside the loop. ; CHECK-LABEL: define void @test62( ; CHECK-NOT: @llvm.objc. ; CHECK: {{^}}} define void @test62(ptr %x, ptr %p) nounwind { entry: br label %loop loop: call ptr @llvm.objc.retain(ptr %x) %q = load i1, ptr %p br i1 %q, label %loop.more, label %exit loop.more: call void @llvm.objc.release(ptr %x) br label %loop exit: call void @llvm.objc.release(ptr %x) ret void } ; Like test62 but with no release in exit. ; Don't delete anything! ; CHECK-LABEL: define void @test63( ; CHECK: loop: ; CHECK: tail call ptr @llvm.objc.retain(ptr %x) ; CHECK: loop.more: ; CHECK: call void @llvm.objc.release(ptr %x) ; CHECK: {{^}}} define void @test63(ptr %x, ptr %p) nounwind { entry: br label %loop loop: call ptr @llvm.objc.retain(ptr %x) %q = load i1, ptr %p br i1 %q, label %loop.more, label %exit loop.more: call void @llvm.objc.release(ptr %x) br label %loop exit: ret void } ; Like test62 but with no release in loop.more. ; Don't delete anything! ; CHECK-LABEL: define void @test64( ; CHECK: loop: ; CHECK: tail call ptr @llvm.objc.retain(ptr %x) ; CHECK: exit: ; CHECK: call void @llvm.objc.release(ptr %x) ; CHECK: {{^}}} define void @test64(ptr %x, ptr %p) nounwind { entry: br label %loop loop: call ptr @llvm.objc.retain(ptr %x) %q = load i1, ptr %p br i1 %q, label %loop.more, label %exit loop.more: br label %loop exit: call void @llvm.objc.release(ptr %x) ret void } ; Move an autorelease past a phi with a null. ; CHECK-LABEL: define ptr @test65( ; CHECK: if.then: ; CHECK: call ptr @llvm.objc.autorelease( ; CHECK: return: ; CHECK-NOT: @llvm.objc.autorelease ; CHECK: {{^}}} define ptr @test65(i1 %x) { entry: br i1 %x, label %return, label %if.then if.then: ; preds = %entry %c = call ptr @returner() %s = call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %c) nounwind br label %return return: ; preds = %if.then, %entry %retval = phi ptr [ %s, %if.then ], [ null, %entry ] %q = call ptr @llvm.objc.autorelease(ptr %retval) nounwind ret ptr %retval } ; Don't move an autorelease past an autorelease pool boundary. ; CHECK-LABEL: define ptr @test65b( ; CHECK: if.then: ; CHECK-NOT: @llvm.objc.autorelease ; CHECK: return: ; CHECK: call ptr @llvm.objc.autorelease( ; CHECK: {{^}}} define ptr @test65b(i1 %x) { entry: %t = call ptr @llvm.objc.autoreleasePoolPush() br i1 %x, label %return, label %if.then if.then: ; preds = %entry %c = call ptr @returner() %s = call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %c) nounwind br label %return return: ; preds = %if.then, %entry %retval = phi ptr [ %s, %if.then ], [ null, %entry ] call void @llvm.objc.autoreleasePoolPop(ptr %t) %q = call ptr @llvm.objc.autorelease(ptr %retval) nounwind ret ptr %retval } ; Don't move an autoreleaseReuturnValue, which would break ; the RV optimization. ; CHECK-LABEL: define ptr @test65c( ; CHECK: if.then: ; CHECK-NOT: @llvm.objc.autorelease ; CHECK: return: ; CHECK: call ptr @llvm.objc.autoreleaseReturnValue( ; CHECK: {{^}}} define ptr @test65c(i1 %x) { entry: br i1 %x, label %return, label %if.then if.then: ; preds = %entry %c = call ptr @returner() %s = call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %c) nounwind br label %return return: ; preds = %if.then, %entry %retval = phi ptr [ %s, %if.then ], [ null, %entry ] %q = call ptr @llvm.objc.autoreleaseReturnValue(ptr %retval) nounwind ret ptr %retval } ; CHECK-LABEL: define ptr @test65d( ; CHECK: if.then: ; CHECK-NOT: @llvm.objc.autorelease ; CHECK: return: ; CHECK: call ptr @llvm.objc.autoreleaseReturnValue( ; CHECK: {{^}}} define ptr @test65d(i1 %x) { entry: br i1 %x, label %return, label %if.then if.then: ; preds = %entry %c = call ptr @returner() %s = call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %c) nounwind br label %return return: ; preds = %if.then, %entry %retval = phi ptr [ %s, %if.then ], [ null, %entry ] %q = call ptr @llvm.objc.autoreleaseReturnValue(ptr %retval) nounwind ret ptr %retval } ; An llvm.objc.retain can serve as a may-use for a different pointer. ; rdar://11931823 ; CHECK-LABEL: define void @test66a( ; CHECK: tail call ptr @llvm.objc.retain(ptr %cond) [[NUW]] ; CHECK: tail call void @llvm.objc.release(ptr %call) [[NUW]] ; CHECK: tail call ptr @llvm.objc.retain(ptr %tmp8) [[NUW]] ; CHECK: tail call void @llvm.objc.release(ptr %cond) [[NUW]] ; CHECK: {{^}}} define void @test66a(ptr %tmp5, ptr %bar, i1 %tobool, i1 %tobool1, ptr %call) { entry: br i1 %tobool, label %cond.true, label %cond.end cond.true: br label %cond.end cond.end: ; preds = %cond.true, %entry %cond = phi ptr [ %tmp5, %cond.true ], [ %call, %entry ] %tmp7 = tail call ptr @llvm.objc.retain(ptr %cond) nounwind tail call void @llvm.objc.release(ptr %call) nounwind %tmp8 = select i1 %tobool1, ptr %cond, ptr %bar %tmp9 = tail call ptr @llvm.objc.retain(ptr %tmp8) nounwind tail call void @llvm.objc.release(ptr %cond) nounwind ret void } ; CHECK-LABEL: define void @test66b( ; CHECK: tail call ptr @llvm.objc.retain(ptr %cond) [[NUW]] ; CHECK: tail call void @llvm.objc.release(ptr %call) [[NUW]] ; CHECK: tail call ptr @llvm.objc.retain(ptr %tmp8) [[NUW]] ; CHECK: tail call void @llvm.objc.release(ptr %cond) [[NUW]] ; CHECK: {{^}}} define void @test66b(ptr %tmp5, ptr %bar, i1 %tobool, i1 %tobool1, ptr %call) { entry: br i1 %tobool, label %cond.true, label %cond.end cond.true: br label %cond.end cond.end: ; preds = %cond.true, %entry %cond = phi ptr [ %tmp5, %cond.true ], [ %call, %entry ] %tmp7 = tail call ptr @llvm.objc.retain(ptr %cond) nounwind tail call void @llvm.objc.release(ptr %call) nounwind, !clang.imprecise_release !0 %tmp8 = select i1 %tobool1, ptr %cond, ptr %bar %tmp9 = tail call ptr @llvm.objc.retain(ptr %tmp8) nounwind tail call void @llvm.objc.release(ptr %cond) nounwind ret void } ; CHECK-LABEL: define void @test66c( ; CHECK: tail call ptr @llvm.objc.retain(ptr %cond) [[NUW]] ; CHECK: tail call void @llvm.objc.release(ptr %call) [[NUW]] ; CHECK: tail call ptr @llvm.objc.retain(ptr %tmp8) [[NUW]] ; CHECK: tail call void @llvm.objc.release(ptr %cond) [[NUW]] ; CHECK: {{^}}} define void @test66c(ptr %tmp5, ptr %bar, i1 %tobool, i1 %tobool1, ptr %call) { entry: br i1 %tobool, label %cond.true, label %cond.end cond.true: br label %cond.end cond.end: ; preds = %cond.true, %entry %cond = phi ptr [ %tmp5, %cond.true ], [ %call, %entry ] %tmp7 = tail call ptr @llvm.objc.retain(ptr %cond) nounwind tail call void @llvm.objc.release(ptr %call) nounwind %tmp8 = select i1 %tobool1, ptr %cond, ptr %bar %tmp9 = tail call ptr @llvm.objc.retain(ptr %tmp8) nounwind, !clang.imprecise_release !0 tail call void @llvm.objc.release(ptr %cond) nounwind ret void } ; CHECK-LABEL: define void @test66d( ; CHECK: tail call ptr @llvm.objc.retain(ptr %cond) [[NUW]] ; CHECK: tail call void @llvm.objc.release(ptr %call) [[NUW]] ; CHECK: tail call ptr @llvm.objc.retain(ptr %tmp8) [[NUW]] ; CHECK: tail call void @llvm.objc.release(ptr %cond) [[NUW]] ; CHECK: {{^}}} define void @test66d(ptr %tmp5, ptr %bar, i1 %tobool, i1 %tobool1, ptr %call) { entry: br i1 %tobool, label %cond.true, label %cond.end cond.true: br label %cond.end cond.end: ; preds = %cond.true, %entry %cond = phi ptr [ %tmp5, %cond.true ], [ %call, %entry ] %tmp7 = tail call ptr @llvm.objc.retain(ptr %cond) nounwind tail call void @llvm.objc.release(ptr %call) nounwind, !clang.imprecise_release !0 %tmp8 = select i1 %tobool1, ptr %cond, ptr %bar %tmp9 = tail call ptr @llvm.objc.retain(ptr %tmp8) nounwind tail call void @llvm.objc.release(ptr %cond) nounwind, !clang.imprecise_release !0 ret void } ; A few real-world testcases. @.str4 = private unnamed_addr constant [33 x i8] c"-[A z] = { %f, %f, { %f, %f } }\0A\00" @"OBJC_IVAR_$_A.myZ" = global i64 20, section "__DATA, __objc_const", align 8 declare i32 @printf(ptr nocapture, ...) nounwind declare i32 @puts(ptr nocapture) nounwind @str = internal constant [16 x i8] c"-[ Top0 _getX ]\00" ; FIXME: Should be able to eliminate the retain and release ; CHECK-LABEL: define { <2 x float>, <2 x float> } @"\01-[A z]"(ptr %self, ptr nocapture %_cmd) ; CHECK: tail call ptr @llvm.objc.retain(ptr %self) ; CHECK-NEXT: %call = tail call i32 (ptr, ...) @printf( ; CHECK: tail call void @llvm.objc.release(ptr %self) ; CHECK: {{^}}} define { <2 x float>, <2 x float> } @"\01-[A z]"(ptr %self, ptr nocapture %_cmd) nounwind { invoke.cont: %i1 = tail call ptr @llvm.objc.retain(ptr %self) nounwind tail call void @llvm.dbg.value(metadata ptr %self, metadata !DILocalVariable(scope: !2), metadata !DIExpression()), !dbg !DILocation(scope: !2) tail call void @llvm.dbg.value(metadata ptr %self, metadata !DILocalVariable(scope: !2), metadata !DIExpression()), !dbg !DILocation(scope: !2) %ivar = load i64, ptr @"OBJC_IVAR_$_A.myZ", align 8 %add.ptr = getelementptr i8, ptr %self, i64 %ivar %tmp2 = load float, ptr %add.ptr, align 4 %conv = fpext float %tmp2 to double %add.ptr.sum = add i64 %ivar, 4 %tmp6 = getelementptr inbounds i8, ptr %self, i64 %add.ptr.sum %tmp7 = load float, ptr %tmp6, align 4 %conv8 = fpext float %tmp7 to double %add.ptr.sum36 = add i64 %ivar, 8 %tmp12 = getelementptr inbounds i8, ptr %self, i64 %add.ptr.sum36 %tmp13 = load float, ptr %tmp12, align 4 %conv14 = fpext float %tmp13 to double %tmp12.sum = add i64 %ivar, 12 %arrayidx19 = getelementptr inbounds i8, ptr %self, i64 %tmp12.sum %tmp20 = load float, ptr %arrayidx19, align 4 %conv21 = fpext float %tmp20 to double %call = tail call i32 (ptr, ...) @printf(ptr @.str4, double %conv, double %conv8, double %conv14, double %conv21) %ivar23 = load i64, ptr @"OBJC_IVAR_$_A.myZ", align 8 %add.ptr24 = getelementptr i8, ptr %self, i64 %ivar23 %srcval = load i128, ptr %add.ptr24, align 4 tail call void @llvm.objc.release(ptr %self) nounwind %tmp29 = trunc i128 %srcval to i64 %tmp30 = bitcast i64 %tmp29 to <2 x float> %tmp31 = insertvalue { <2 x float>, <2 x float> } undef, <2 x float> %tmp30, 0 %tmp32 = lshr i128 %srcval, 64 %tmp33 = trunc i128 %tmp32 to i64 %tmp34 = bitcast i64 %tmp33 to <2 x float> %tmp35 = insertvalue { <2 x float>, <2 x float> } %tmp31, <2 x float> %tmp34, 1 ret { <2 x float>, <2 x float> } %tmp35 } ; FIXME: Should be able to eliminate the retain and release ; CHECK-LABEL: @"\01-[Top0 _getX]"(ptr %self, ptr nocapture %_cmd) ; CHECK: tail call ptr @llvm.objc.retain(ptr %self) ; CHECK: %puts = tail call i32 @puts ; CHECK: tail call void @llvm.objc.release(ptr %self) define i32 @"\01-[Top0 _getX]"(ptr %self, ptr nocapture %_cmd) nounwind { invoke.cont: %i1 = tail call ptr @llvm.objc.retain(ptr %self) nounwind %puts = tail call i32 @puts(ptr @str) tail call void @llvm.objc.release(ptr %self) nounwind ret i32 0 } @"\01L_OBJC_METH_VAR_NAME_" = internal global [5 x i8] c"frob\00", section "__TEXT,__cstring,cstring_literals", align 1@"\01L_OBJC_SELECTOR_REFERENCES_" = internal global ptr @"\01L_OBJC_METH_VAR_NAME_", section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_IMAGE_INFO" = internal constant [2 x i32] [i32 0, i32 16], section "__DATA, __objc_imageinfo, regular, no_dead_strip" @llvm.used = appending global [3 x ptr] [ptr @"\01L_OBJC_METH_VAR_NAME_", ptr @"\01L_OBJC_SELECTOR_REFERENCES_", ptr @"\01L_OBJC_IMAGE_INFO"], section "llvm.metadata" ; A simple loop. Eliminate the retain and release inside of it! ; CHECK: define void @loop(ptr %x, i64 %n) { ; CHECK: for.body: ; CHECK-NOT: @llvm.objc. ; CHECK: @objc_msgSend ; CHECK-NOT: @llvm.objc. ; CHECK: for.end: ; CHECK: {{^}}} define void @loop(ptr %x, i64 %n) { entry: %0 = tail call ptr @llvm.objc.retain(ptr %x) nounwind %cmp9 = icmp sgt i64 %n, 0 br i1 %cmp9, label %for.body, label %for.end for.body: ; preds = %entry, %for.body %i.010 = phi i64 [ %inc, %for.body ], [ 0, %entry ] %1 = tail call ptr @llvm.objc.retain(ptr %x) nounwind %tmp5 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_", align 8 %call = tail call ptr (ptr, ptr, ...) @objc_msgSend(ptr %1, ptr %tmp5) tail call void @llvm.objc.release(ptr %1) nounwind, !clang.imprecise_release !0 %inc = add nsw i64 %i.010, 1 %exitcond = icmp eq i64 %inc, %n br i1 %exitcond, label %for.end, label %for.body for.end: ; preds = %for.body, %entry tail call void @llvm.objc.release(ptr %x) nounwind, !clang.imprecise_release !0 ret void } ; ObjCARCOpt can delete the retain,release on self. ; CHECK: define void @TextEditTest(ptr %self, ptr %pboard) { ; CHECK-NOT: call ptr @llvm.objc.retain(ptr %tmp7) ; CHECK: {{^}}} %0 = type { ptr, ptr } %1 = type opaque %2 = type opaque %3 = type opaque %4 = type opaque %5 = type opaque %struct.NSConstantString = type { ptr, i32, ptr, i64 } %struct._NSRange = type { i64, i64 } %struct.__CFString = type opaque %struct.__method_list_t = type { i32, i32, [0 x %struct._objc_method] } %struct._class_ro_t = type { i32, i32, i32, ptr, ptr, ptr, ptr, ptr, ptr, ptr } %struct._class_t = type { ptr, ptr, ptr, ptr, ptr } %struct._ivar_list_t = type { i32, i32, [0 x %struct._ivar_t] } %struct._ivar_t = type { ptr, ptr, ptr, i32, i32 } %struct._message_ref_t = type { ptr, ptr } %struct._objc_cache = type opaque %struct._objc_method = type { ptr, ptr, ptr } %struct._objc_protocol_list = type { i64, [0 x ptr] } %struct._prop_list_t = type { i32, i32, [0 x %struct._message_ref_t] } %struct._protocol_t = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, i32, i32 } @"\01L_OBJC_CLASSLIST_REFERENCES_$_17" = external hidden global ptr, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 @kUTTypePlainText = external constant ptr @"\01L_OBJC_SELECTOR_REFERENCES_19" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_SELECTOR_REFERENCES_21" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_SELECTOR_REFERENCES_23" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_SELECTOR_REFERENCES_25" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_CLASSLIST_REFERENCES_$_26" = external hidden global ptr, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 @"\01L_OBJC_SELECTOR_REFERENCES_28" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_CLASSLIST_REFERENCES_$_29" = external hidden global ptr, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 @"\01L_OBJC_SELECTOR_REFERENCES_31" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_SELECTOR_REFERENCES_33" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_SELECTOR_REFERENCES_35" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_SELECTOR_REFERENCES_37" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_CLASSLIST_REFERENCES_$_38" = external hidden global ptr, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 @"\01L_OBJC_SELECTOR_REFERENCES_40" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_SELECTOR_REFERENCES_42" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @_unnamed_cfstring_44 = external hidden constant %struct.NSConstantString, section "__DATA,__cfstring" @"\01L_OBJC_SELECTOR_REFERENCES_46" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_SELECTOR_REFERENCES_48" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01l_objc_msgSend_fixup_isEqual_" = external hidden global %0, section "__DATA, __objc_msgrefs, coalesced", align 16 @"\01L_OBJC_CLASSLIST_REFERENCES_$_50" = external hidden global ptr, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 @NSCocoaErrorDomain = external constant ptr @"\01L_OBJC_CLASSLIST_REFERENCES_$_51" = external hidden global ptr, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 @NSFilePathErrorKey = external constant ptr @"\01L_OBJC_SELECTOR_REFERENCES_53" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_SELECTOR_REFERENCES_55" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_CLASSLIST_REFERENCES_$_56" = external hidden global ptr, section "__DATA, __objc_classrefs, regular, no_dead_strip", align 8 @"\01L_OBJC_SELECTOR_REFERENCES_58" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" @"\01L_OBJC_SELECTOR_REFERENCES_60" = external hidden global ptr, section "__DATA, __objc_selrefs, literal_pointers, no_dead_strip" declare ptr @truncatedString(ptr, i64) define void @TextEditTest(ptr %self, ptr %pboard) { entry: %err = alloca ptr, align 8 %tmp8 = call ptr @llvm.objc.retain(ptr %self) nounwind store ptr null, ptr %err, align 8 %tmp1 = load ptr, ptr @"\01L_OBJC_CLASSLIST_REFERENCES_$_17", align 8 %tmp2 = load ptr, ptr @kUTTypePlainText, align 8 %tmp3 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_19", align 8 %call5 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %tmp1, ptr %tmp3, ptr %tmp2) %tmp5 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_21", align 8 %call76 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %pboard, ptr %tmp5, ptr %call5) %tmp9 = call ptr @llvm.objc.retain(ptr %call76) nounwind %tobool = icmp eq ptr %tmp9, null br i1 %tobool, label %end, label %land.lhs.true land.lhs.true: ; preds = %entry %tmp11 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_23", align 8 %call137 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %pboard, ptr %tmp11, ptr %tmp9) %tmp10 = call ptr @llvm.objc.retain(ptr %call137) nounwind call void @llvm.objc.release(ptr null) nounwind %tmp12 = call ptr @llvm.objc.retain(ptr %call137) nounwind call void @llvm.objc.release(ptr null) nounwind %tobool16 = icmp eq ptr %call137, null br i1 %tobool16, label %end, label %if.then if.then: ; preds = %land.lhs.true %tmp19 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_25", align 8 %call21 = call signext i8 @objc_msgSend(ptr %call137, ptr %tmp19) %tobool22 = icmp eq i8 %call21, 0 br i1 %tobool22, label %if.then44, label %land.lhs.true23 land.lhs.true23: ; preds = %if.then %tmp24 = load ptr, ptr @"\01L_OBJC_CLASSLIST_REFERENCES_$_26", align 8 %tmp26 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_28", align 8 %call2822 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %tmp24, ptr %tmp26, ptr %call137) %tmp14 = call ptr @llvm.objc.retain(ptr %call2822) nounwind call void @llvm.objc.release(ptr null) nounwind %tobool30 = icmp eq ptr %call2822, null br i1 %tobool30, label %if.then44, label %if.end if.end: ; preds = %land.lhs.true23 %tmp32 = load ptr, ptr @"\01L_OBJC_CLASSLIST_REFERENCES_$_29", align 8 %tmp33 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_31", align 8 %call35 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %tmp32, ptr %tmp33) %tmp37 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_33", align 8 %call3923 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %call35, ptr %tmp37, ptr %call2822, i32 signext 1, ptr %err) %cmp = icmp eq ptr %call3923, null br i1 %cmp, label %if.then44, label %end if.then44: ; preds = %if.end, %land.lhs.true23, %if.then %url.025 = phi ptr [ %call2822, %if.end ], [ %call2822, %land.lhs.true23 ], [ null, %if.then ] %tmp49 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_35", align 8 %call51 = call %struct._NSRange @objc_msgSend(ptr %call137, ptr %tmp49, i64 0, i64 0) %call513 = extractvalue %struct._NSRange %call51, 0 %call514 = extractvalue %struct._NSRange %call51, 1 %tmp52 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_37", align 8 %call548 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %call137, ptr %tmp52, i64 %call513, i64 %call514) %tmp55 = load ptr, ptr @"\01L_OBJC_CLASSLIST_REFERENCES_$_38", align 8 %tmp56 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_40", align 8 %call58 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %tmp55, ptr %tmp56) %tmp59 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_42", align 8 %call6110 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %call548, ptr %tmp59, ptr %call58) %tmp15 = call ptr @llvm.objc.retain(ptr %call6110) nounwind call void @llvm.objc.release(ptr %call137) nounwind %tmp64 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_46", align 8 %call66 = call signext i8 @objc_msgSend(ptr %call6110, ptr %tmp64, ptr @_unnamed_cfstring_44) %tobool67 = icmp eq i8 %call66, 0 br i1 %tobool67, label %if.end74, label %if.then68 if.then68: ; preds = %if.then44 %tmp70 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_48", align 8 %call7220 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %call6110, ptr %tmp70) %tmp16 = call ptr @llvm.objc.retain(ptr %call7220) nounwind call void @llvm.objc.release(ptr %call6110) nounwind br label %if.end74 if.end74: ; preds = %if.then68, %if.then44 %filename.0.in = phi ptr [ %call7220, %if.then68 ], [ %call6110, %if.then44 ] %tmp17 = load ptr, ptr @"\01l_objc_msgSend_fixup_isEqual_", align 16 %call78 = call signext i8 (ptr, ptr, ptr, ...) %tmp17(ptr %call137, ptr @"\01l_objc_msgSend_fixup_isEqual_", ptr %filename.0.in) %tobool79 = icmp eq i8 %call78, 0 br i1 %tobool79, label %land.lhs.true80, label %if.then109 land.lhs.true80: ; preds = %if.end74 %tmp82 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_25", align 8 %call84 = call signext i8 @objc_msgSend(ptr %filename.0.in, ptr %tmp82) %tobool86 = icmp eq i8 %call84, 0 br i1 %tobool86, label %if.then109, label %if.end106 if.end106: ; preds = %land.lhs.true80 %tmp88 = load ptr, ptr @"\01L_OBJC_CLASSLIST_REFERENCES_$_26", align 8 %tmp90 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_28", align 8 %call9218 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %tmp88, ptr %tmp90, ptr %filename.0.in) %tmp21 = call ptr @llvm.objc.retain(ptr %call9218) nounwind call void @llvm.objc.release(ptr %url.025) nounwind %tmp94 = load ptr, ptr @"\01L_OBJC_CLASSLIST_REFERENCES_$_29", align 8 %tmp95 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_31", align 8 %call97 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %tmp94, ptr %tmp95) %tmp99 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_33", align 8 %call10119 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %call97, ptr %tmp99, ptr %call9218, i32 signext 1, ptr %err) %phitmp = icmp eq ptr %call10119, null br i1 %phitmp, label %if.then109, label %end if.then109: ; preds = %if.end106, %land.lhs.true80, %if.end74 %url.129 = phi ptr [ %call9218, %if.end106 ], [ %url.025, %if.end74 ], [ %url.025, %land.lhs.true80 ] %tmp110 = load ptr, ptr %err, align 8 %tobool111 = icmp eq ptr %tmp110, null br i1 %tobool111, label %if.then112, label %if.end125 if.then112: ; preds = %if.then109 %tmp113 = load ptr, ptr @"\01L_OBJC_CLASSLIST_REFERENCES_$_50", align 8 %tmp114 = load ptr, ptr @NSCocoaErrorDomain, align 8 %tmp115 = load ptr, ptr @"\01L_OBJC_CLASSLIST_REFERENCES_$_51", align 8 %call117 = call ptr @truncatedString(ptr %filename.0.in, i64 1034) %tmp118 = load ptr, ptr @NSFilePathErrorKey, align 8 %tmp119 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_53", align 8 %call12113 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %tmp115, ptr %tmp119, ptr %call117, ptr %tmp118, ptr null) %tmp122 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_55", align 8 %call12414 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %tmp113, ptr %tmp122, ptr %tmp114, i64 258, ptr %call12113) %tmp23 = call ptr @llvm.objc.retain(ptr %call12414) nounwind %tmp25 = call ptr @llvm.objc.autorelease(ptr %tmp23) nounwind store ptr %tmp25, ptr %err, align 8 br label %if.end125 if.end125: ; preds = %if.then112, %if.then109 %tmp127 = phi ptr [ %tmp110, %if.then109 ], [ %tmp25, %if.then112 ] %tmp126 = load ptr, ptr @"\01L_OBJC_CLASSLIST_REFERENCES_$_56", align 8 %tmp128 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_58", align 8 %call13015 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %tmp126, ptr %tmp128, ptr %tmp127) %tmp131 = load ptr, ptr @"\01L_OBJC_SELECTOR_REFERENCES_60", align 8 %call13317 = call ptr (ptr, ptr, ...) @objc_msgSend(ptr %call13015, ptr %tmp131) br label %end end: ; preds = %if.end125, %if.end106, %if.end, %land.lhs.true, %entry %filename.2 = phi ptr [ %filename.0.in, %if.end106 ], [ %filename.0.in, %if.end125 ], [ %call137, %land.lhs.true ], [ null, %entry ], [ %call137, %if.end ] %origFilename.0 = phi ptr [ %call137, %if.end106 ], [ %call137, %if.end125 ], [ %call137, %land.lhs.true ], [ null, %entry ], [ %call137, %if.end ] %url.2 = phi ptr [ %call9218, %if.end106 ], [ %url.129, %if.end125 ], [ null, %land.lhs.true ], [ null, %entry ], [ %call2822, %if.end ] call void @llvm.objc.release(ptr %tmp9) nounwind, !clang.imprecise_release !0 call void @llvm.objc.release(ptr %url.2) nounwind, !clang.imprecise_release !0 call void @llvm.objc.release(ptr %origFilename.0) nounwind, !clang.imprecise_release !0 call void @llvm.objc.release(ptr %filename.2) nounwind, !clang.imprecise_release !0 call void @llvm.objc.release(ptr %self) nounwind, !clang.imprecise_release !0 ret void } declare i32 @__gxx_personality_v0(...) declare i32 @llvm.objc.sync.enter(ptr) declare i32 @llvm.objc.sync.exit(ptr) ; Make sure that we understand that objc_sync_{enter,exit} are IC_User not ; IC_Call/IC_CallOrUser. ; CHECK-LABEL: define void @test67( ; CHECK-NEXT: call i32 @llvm.objc.sync.enter(ptr %x) ; CHECK-NEXT: call i32 @llvm.objc.sync.exit(ptr %x) ; CHECK-NEXT: ret void ; CHECK-NEXT: } define void @test67(ptr %x) { call ptr @llvm.objc.retain(ptr %x) call i32 @llvm.objc.sync.enter(ptr %x) call i32 @llvm.objc.sync.exit(ptr %x) call void @llvm.objc.release(ptr %x), !clang.imprecise_release !0 ret void } ; CHECK-LABEL: define void @test68( ; CHECK-NOT: call ; CHECK: call void @callee2( ; CHECK-NOT: call ; CHECK: ret void define void @test68(ptr %a, ptr %b) { call ptr @llvm.objc.retain(ptr %a) call ptr @llvm.objc.retain(ptr %b) call void @callee2(ptr %a, ptr %b) call void @llvm.objc.release(ptr %b), !clang.imprecise_release !0 call void @llvm.objc.release(ptr %a), !clang.imprecise_release !0 ret void } !llvm.module.flags = !{!1} !llvm.dbg.cu = !{!3} !0 = !{} !1 = !{i32 1, !"Debug Info Version", i32 3} !2 = distinct !DISubprogram(unit: !3) !3 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang", file: !4, isOptimized: true, flags: "-O2", splitDebugFilename: "abc.debug", emissionKind: 2) !4 = !DIFile(filename: "path/to/file", directory: "/path/to/dir") !5 = !{i32 2, !"Debug Info Version", i32 3} ; CHECK: attributes [[NUW]] = { nounwind } ; CHECK: attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) } ; CHECK: ![[RELEASE]] = !{}