; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -passes=rewrite-statepoints-for-gc -S 2>&1 | FileCheck %s declare ptr addrspace(1) @generate_obj() "gc-leaf-function" declare void @use_obj(ptr addrspace(1)) "gc-leaf-function" ; The rewriting needs to make %obj loop variant by inserting a phi ; of the original value and it's relocation. define void @test() gc "statepoint-example" { ; CHECK-LABEL: @test( ; CHECK-NEXT: entry: ; CHECK-NEXT: [[OBJ:%.*]] = call ptr addrspace(1) @generate_obj() ; CHECK-NEXT: br label [[LOOP:%.*]] ; CHECK: loop: ; CHECK-NEXT: [[DOT0:%.*]] = phi ptr addrspace(1) [ [[OBJ]], [[ENTRY:%.*]] ], [ [[OBJ_RELOCATED:%.*]], [[LOOP]] ] ; CHECK-NEXT: call void @use_obj(ptr addrspace(1) [[DOT0]]) ; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @do_safepoint, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[DOT0]]) ] ; CHECK-NEXT: [[OBJ_RELOCATED]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0) ; CHECK-NEXT: br label [[LOOP]] ; entry: %obj = call ptr addrspace(1) @generate_obj() br label %loop loop: call void @use_obj(ptr addrspace(1) %obj) call void @do_safepoint() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] br label %loop } declare void @do_safepoint() declare void @parse_point(ptr addrspace(1)) define ptr addrspace(1) @test1(i32 %caller, ptr addrspace(1) %a, ptr addrspace(1) %b, i32 %unknown, i1 %c) gc "statepoint-example" { ; CHECK-LABEL: @test1( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]] ; CHECK: left: ; CHECK-NEXT: switch i32 [[UNKNOWN:%.*]], label [[RIGHT]] [ ; CHECK-NEXT: i32 0, label [[MERGE:%.*]] ; CHECK-NEXT: i32 1, label [[MERGE]] ; CHECK-NEXT: i32 5, label [[MERGE]] ; CHECK-NEXT: ] ; CHECK: right: ; CHECK-NEXT: br label [[MERGE]] ; CHECK: merge: ; CHECK-NEXT: [[VALUE:%.*]] = phi ptr addrspace(1) [ [[A:%.*]], [[LEFT]] ], [ [[A]], [[LEFT]] ], [ [[A]], [[LEFT]] ], [ [[B:%.*]], [[RIGHT]] ] ; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void (ptr addrspace(1))) @parse_point, i32 1, i32 0, ptr addrspace(1) [[VALUE]], i32 0, i32 0) [ "deopt"(i32 0, i32 0, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[VALUE]]) ] ; CHECK-NEXT: [[VALUE_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0) ; CHECK-NEXT: ret ptr addrspace(1) [[VALUE_RELOCATED]] ; entry: br i1 %c, label %left, label %right left: ; Our safepoint placement pass calls removeUnreachableBlocks, which does a bunch ; of simplifications to branch instructions. This bug is visible only when ; there are multiple branches into the same block from the same predecessor, and ; the following ceremony is to make that artefact survive a call to ; removeUnreachableBlocks. As an example, "br i1 undef, label %merge, label %merge" ; will get simplified to "br label %merge" by removeUnreachableBlocks. switch i32 %unknown, label %right [ i32 0, label %merge i32 1, label %merge i32 5, label %merge i32 3, label %right ] right: br label %merge merge: %value = phi ptr addrspace(1) [ %a, %left ], [ %a, %left ], [ %a, %left ], [ %b, %right ] call void @parse_point(ptr addrspace(1) %value) [ "deopt"(i32 0, i32 0, i32 0, i32 0, i32 0) ] ret ptr addrspace(1) %value } ;; The purpose of this test is to ensure that when two live values share a ;; base defining value with inherent conflicts, we end up with a *single* ;; base phi/select per such node. This is testing an optimization, not a ;; fundemental correctness criteria define void @test2(i1 %cnd, ptr addrspace(1) %base_obj, ptr addrspace(1) %base_arg2) gc "statepoint-example" { ; CHECK-LABEL: @test2( ; CHECK-NEXT: entry: ; CHECK-NEXT: [[OBJ:%.*]] = getelementptr i64, ptr addrspace(1) [[BASE_OBJ:%.*]], i32 1 ; CHECK-NEXT: br label [[LOOP:%.*]] ; CHECK: loop: ; CHECK-NEXT: [[DOT0:%.*]] = phi ptr addrspace(1) [ [[BASE_ARG2:%.*]], [[ENTRY:%.*]] ], [ [[BASE_ARG2_RELOCATED:%.*]], [[LOOP]] ] ; CHECK-NEXT: [[CURRENT_BASE:%.*]] = phi ptr addrspace(1) [ [[BASE_OBJ]], [[ENTRY]] ], [ [[NEXT_BASE_RELOCATED:%.*]], [[LOOP]] ], !is_base_value !0 ; CHECK-NEXT: [[CURRENT:%.*]] = phi ptr addrspace(1) [ [[OBJ]], [[ENTRY]] ], [ [[NEXT_RELOCATED:%.*]], [[LOOP]] ] ; CHECK-NEXT: [[EXTRA:%.*]] = phi ptr addrspace(1) [ [[OBJ]], [[ENTRY]] ], [ [[EXTRA2_RELOCATED:%.*]], [[LOOP]] ] ; CHECK-NEXT: [[NEXTA:%.*]] = getelementptr i64, ptr addrspace(1) [[CURRENT]], i32 1 ; CHECK-NEXT: [[NEXT_BASE:%.*]] = select i1 [[CND:%.*]], ptr addrspace(1) [[CURRENT_BASE]], ptr addrspace(1) [[DOT0]], !is_base_value !0 ; CHECK-NEXT: [[NEXT:%.*]] = select i1 [[CND]], ptr addrspace(1) [[NEXTA]], ptr addrspace(1) [[DOT0]] ; CHECK-NEXT: [[EXTRA2_BASE:%.*]] = select i1 [[CND]], ptr addrspace(1) [[CURRENT_BASE]], ptr addrspace(1) [[DOT0]], !is_base_value !0 ; CHECK-NEXT: [[EXTRA2:%.*]] = select i1 [[CND]], ptr addrspace(1) [[NEXTA]], ptr addrspace(1) [[DOT0]] ; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[NEXT_BASE]], ptr addrspace(1) [[NEXT]], ptr addrspace(1) [[EXTRA2]], ptr addrspace(1) [[DOT0]], ptr addrspace(1) [[EXTRA2_BASE]]) ] ; CHECK-NEXT: [[NEXT_BASE_RELOCATED]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0) ; CHECK-NEXT: [[NEXT_RELOCATED]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 1) ; CHECK-NEXT: [[EXTRA2_RELOCATED]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 4, i32 2) ; CHECK-NEXT: [[BASE_ARG2_RELOCATED]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 3, i32 3) ; CHECK-NEXT: [[EXTRA2_BASE_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 4, i32 4) ; CHECK-NEXT: br label [[LOOP]] ; entry: %obj = getelementptr i64, ptr addrspace(1) %base_obj, i32 1 br label %loop ; Given the two selects are equivelent, so are their base phis - ideally, ; we'd have commoned these, but that's a missed optimization, not correctness. ;; Both 'next' and 'extra2' are live across the backedge safepoint... loop: %current = phi ptr addrspace(1) [ %obj, %entry ], [ %next, %loop ] %extra = phi ptr addrspace(1) [ %obj, %entry ], [ %extra2, %loop ] %nexta = getelementptr i64, ptr addrspace(1) %current, i32 1 %next = select i1 %cnd, ptr addrspace(1) %nexta, ptr addrspace(1) %base_arg2 %extra2 = select i1 %cnd, ptr addrspace(1) %nexta, ptr addrspace(1) %base_arg2 call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] br label %loop } define ptr addrspace(1) @test3(i1 %cnd, ptr addrspace(1) %obj, ptr addrspace(1) %obj2) gc "statepoint-example" { ; CHECK-LABEL: @test3( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[CND:%.*]], label [[MERGE:%.*]], label [[TAKEN:%.*]] ; CHECK: taken: ; CHECK-NEXT: br label [[MERGE]] ; CHECK: merge: ; CHECK-NEXT: [[BDV:%.*]] = phi ptr addrspace(1) [ [[OBJ:%.*]], [[ENTRY:%.*]] ], [ [[OBJ2:%.*]], [[TAKEN]] ] ; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[BDV]]) ] ; CHECK-NEXT: [[BDV_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0) ; CHECK-NEXT: ret ptr addrspace(1) [[BDV_RELOCATED]] ; entry: br i1 %cnd, label %merge, label %taken taken: br label %merge merge: %bdv = phi ptr addrspace(1) [ %obj, %entry ], [ %obj2, %taken ] call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] ret ptr addrspace(1) %bdv } define ptr addrspace(1) @test4(i1 %cnd, ptr addrspace(1) %obj, ptr addrspace(1) %obj2) gc "statepoint-example" { ; CHECK-LABEL: @test4( ; CHECK-NEXT: entry: ; CHECK-NEXT: br i1 [[CND:%.*]], label [[MERGE:%.*]], label [[TAKEN:%.*]] ; CHECK: taken: ; CHECK-NEXT: br label [[MERGE]] ; CHECK: merge: ; CHECK-NEXT: [[BDV:%.*]] = phi ptr addrspace(1) [ [[OBJ:%.*]], [[ENTRY:%.*]] ], [ [[OBJ]], [[TAKEN]] ] ; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[BDV]]) ] ; CHECK-NEXT: [[BDV_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0) ; CHECK-NEXT: ret ptr addrspace(1) [[BDV_RELOCATED]] ; entry: br i1 %cnd, label %merge, label %taken taken: br label %merge merge: %bdv = phi ptr addrspace(1) [ %obj, %entry ], [ %obj, %taken ] call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] ret ptr addrspace(1) %bdv } define ptr addrspace(1) @test5(i1 %cnd, ptr addrspace(1) %obj, ptr addrspace(1) %obj2) gc "statepoint-example" { ; CHECK-LABEL: @test5( ; CHECK-NEXT: entry: ; CHECK-NEXT: br label [[MERGE:%.*]] ; CHECK: merge: ; CHECK-NEXT: [[BDV:%.*]] = phi ptr addrspace(1) [ [[OBJ:%.*]], [[ENTRY:%.*]] ], [ [[OBJ2:%.*]], [[MERGE]] ] ; CHECK-NEXT: br i1 [[CND:%.*]], label [[MERGE]], label [[NEXT:%.*]] ; CHECK: next: ; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0), "gc-live"(ptr addrspace(1) [[BDV]]) ] ; CHECK-NEXT: [[BDV_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0) ; CHECK-NEXT: ret ptr addrspace(1) [[BDV_RELOCATED]] ; entry: br label %merge merge: %bdv = phi ptr addrspace(1) [ %obj, %entry ], [ %obj2, %merge ] br i1 %cnd, label %merge, label %next next: call void @foo() [ "deopt"(i32 0, i32 -1, i32 0, i32 0, i32 0) ] ret ptr addrspace(1) %bdv } ; We know from the deopt use that %bdv must be a base value, and as ; result can avoid materializing the extra copy of the BDV phi node. ; (Even without a general forward analysis) define ptr addrspace(1) @test6(i1 %cnd, ptr addrspace(1) %obj, ptr addrspace(1) %obj2) gc "statepoint-example" { ; CHECK-LABEL: @test6( ; CHECK-NEXT: entry: ; CHECK-NEXT: br label [[MERGE:%.*]] ; CHECK: merge: ; CHECK-NEXT: [[BDV:%.*]] = phi ptr addrspace(1) [ [[OBJ:%.*]], [[ENTRY:%.*]] ], [ [[OBJ2:%.*]], [[MERGE]] ] ; CHECK-NEXT: br i1 [[CND:%.*]], label [[MERGE]], label [[NEXT:%.*]] ; CHECK: next: ; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void ()) @foo, i32 0, i32 0, i32 0, i32 0) [ "deopt"(ptr addrspace(1) [[BDV]]), "gc-live"(ptr addrspace(1) [[BDV]]) ] ; CHECK-NEXT: [[BDV_RELOCATED:%.*]] = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token [[STATEPOINT_TOKEN]], i32 0, i32 0) ; CHECK-NEXT: ret ptr addrspace(1) [[BDV_RELOCATED]] ; entry: br label %merge merge: %bdv = phi ptr addrspace(1) [ %obj, %entry ], [ %obj2, %merge ] br i1 %cnd, label %merge, label %next next: call void @foo() [ "deopt"(ptr addrspace(1) %bdv) ] ret ptr addrspace(1) %bdv } declare i32 @snork() define void @test7() gc "statepoint-example" { ; CHECK-LABEL: @test7( ; CHECK-NEXT: bb: ; CHECK-NEXT: [[GETELEMENTPTR:%.*]] = getelementptr i8, <2 x ptr addrspace(1)> zeroinitializer, <2 x i64> ; CHECK-NEXT: [[SHUFFLEVECTOR_BASE:%.*]] = shufflevector <2 x ptr addrspace(1)> zeroinitializer, <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> , !is_base_value !0 ; CHECK-NEXT: [[SHUFFLEVECTOR:%.*]] = shufflevector <2 x ptr addrspace(1)> [[GETELEMENTPTR]], <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> ; CHECK-NEXT: [[SHUFFLEVECTOR1_BASE:%.*]] = shufflevector <2 x ptr addrspace(1)> zeroinitializer, <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> , !is_base_value !0 ; CHECK-NEXT: [[SHUFFLEVECTOR1:%.*]] = shufflevector <2 x ptr addrspace(1)> [[GETELEMENTPTR]], <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> ; CHECK-NEXT: [[SELECT_BASE:%.*]] = select i1 false, <4 x ptr addrspace(1)> [[SHUFFLEVECTOR1_BASE]], <4 x ptr addrspace(1)> [[SHUFFLEVECTOR_BASE]], !is_base_value !0 ; CHECK-NEXT: [[SELECT:%.*]] = select i1 false, <4 x ptr addrspace(1)> [[SHUFFLEVECTOR1]], <4 x ptr addrspace(1)> [[SHUFFLEVECTOR]] ; CHECK-NEXT: [[STATEPOINT_TOKEN:%.*]] = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(i32 ()) @snork, i32 0, i32 0, i32 0, i32 0) [ "gc-live"(<4 x ptr addrspace(1)> [[SELECT]], <4 x ptr addrspace(1)> [[SELECT_BASE]]) ] ; CHECK-NEXT: [[SELECT_RELOCATED:%.*]] = call coldcc <4 x ptr addrspace(1)> @llvm.experimental.gc.relocate.v4p1(token [[STATEPOINT_TOKEN]], i32 1, i32 0) ; CHECK-NEXT: [[SELECT_BASE_RELOCATED:%.*]] = call coldcc <4 x ptr addrspace(1)> @llvm.experimental.gc.relocate.v4p1(token [[STATEPOINT_TOKEN]], i32 1, i32 1) ; CHECK-NEXT: [[EXTRACTELEMENT:%.*]] = extractelement <4 x ptr addrspace(1)> [[SELECT_RELOCATED]], i32 0 ; CHECK-NEXT: ret void ; bb: %getelementptr = getelementptr i8, <2 x ptr addrspace(1)> zeroinitializer, <2 x i64> %shufflevector = shufflevector <2 x ptr addrspace(1)> %getelementptr, <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> %shufflevector1 = shufflevector <2 x ptr addrspace(1)> %getelementptr, <2 x ptr addrspace(1)> zeroinitializer, <4 x i32> %select = select i1 false, <4 x ptr addrspace(1)> %shufflevector1, <4 x ptr addrspace(1)> %shufflevector %call = call i32 @snork() %extractelement = extractelement <4 x ptr addrspace(1)> %select, i32 0 ret void } declare void @foo()