; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -passes=memcpyopt -S -verify-memoryssa | FileCheck %s ; Test whether memcpy-memcpy dependence is optimized across ; basic blocks (conditional branches and invokes). ; TODO: This is not supported yet. %struct.s = type { i32, i32 } @s_foo = private unnamed_addr constant %struct.s { i32 1, i32 2 }, align 4 @s_baz = private unnamed_addr constant %struct.s { i32 1, i32 2 }, align 4 @i = external constant ptr declare void @qux() declare void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1) declare void @__cxa_throw(ptr, ptr, ptr) declare i32 @__gxx_personality_v0(...) declare ptr @__cxa_begin_catch(ptr) ; A simple partial redundancy. Test that the second memcpy is optimized ; to copy directly from the original source rather than from the temporary. define void @wobble(ptr noalias %dst, ptr %src, i1 %some_condition) { ; CHECK-LABEL: @wobble( ; CHECK-NEXT: bb: ; CHECK-NEXT: [[TEMP:%.*]] = alloca i8, i32 64, align 1 ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[TEMP]], ptr nonnull align 8 [[SRC:%.*]], i64 64, i1 false) ; CHECK-NEXT: br i1 [[SOME_CONDITION:%.*]], label [[MORE:%.*]], label [[OUT:%.*]] ; CHECK: out: ; CHECK-NEXT: call void @qux() ; CHECK-NEXT: unreachable ; CHECK: more: ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[DST:%.*]], ptr align 8 [[SRC]], i64 64, i1 false) ; CHECK-NEXT: ret void ; bb: %temp = alloca i8, i32 64 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %temp, ptr nonnull align 8%src, i64 64, i1 false) br i1 %some_condition, label %more, label %out out: call void @qux() unreachable more: call void @llvm.memcpy.p0.p0.i64(ptr align 8 %dst, ptr align 8 %temp, i64 64, i1 false) ret void } ; A CFG triangle with a partial redundancy targeting an alloca. Test that the ; memcpy inside the triangle is optimized to copy directly from the original ; source rather than from the temporary. define i32 @foo(i1 %t3) { ; CHECK-LABEL: @foo( ; CHECK-NEXT: bb: ; CHECK-NEXT: [[S:%.*]] = alloca [[STRUCT_S:%.*]], align 4 ; CHECK-NEXT: [[T:%.*]] = alloca [[STRUCT_S]], align 4 ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[S]], ptr align 4 @s_foo, i64 8, i1 false) ; CHECK-NEXT: br i1 [[T3:%.*]], label [[BB4:%.*]], label [[BB7:%.*]] ; CHECK: bb4: ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[T]], ptr align 4 @s_foo, i64 8, i1 false) ; CHECK-NEXT: br label [[BB7]] ; CHECK: bb7: ; CHECK-NEXT: [[T9:%.*]] = load i32, ptr [[T]], align 4 ; CHECK-NEXT: [[T10:%.*]] = getelementptr [[STRUCT_S]], ptr [[T]], i32 0, i32 1 ; CHECK-NEXT: [[T11:%.*]] = load i32, ptr [[T10]], align 4 ; CHECK-NEXT: [[T12:%.*]] = add i32 [[T9]], [[T11]] ; CHECK-NEXT: ret i32 [[T12]] ; bb: %s = alloca %struct.s, align 4 %t = alloca %struct.s, align 4 call void @llvm.memcpy.p0.p0.i64(ptr align 4 %s, ptr align 4 @s_foo, i64 8, i1 false) br i1 %t3, label %bb4, label %bb7 bb4: ; preds = %bb call void @llvm.memcpy.p0.p0.i64(ptr align 4 %t, ptr align 4 %s, i64 8, i1 false) br label %bb7 bb7: ; preds = %bb4, %bb %t9 = load i32, ptr %t, align 4 %t10 = getelementptr %struct.s, ptr %t, i32 0, i32 1 %t11 = load i32, ptr %t10, align 4 %t12 = add i32 %t9, %t11 ret i32 %t12 } ; A CFG diamond with an invoke on one side, and a partially redundant memcpy ; into an alloca on the other. Test that the memcpy inside the diamond is ; optimized to copy ; directly from the original source rather than from the ; temporary. This more complex test represents a relatively common usage ; pattern. define i32 @baz(i1 %t5) personality ptr @__gxx_personality_v0 { ; CHECK-LABEL: @baz( ; CHECK-NEXT: bb: ; CHECK-NEXT: [[S:%.*]] = alloca [[STRUCT_S:%.*]], align 4 ; CHECK-NEXT: [[T:%.*]] = alloca [[STRUCT_S]], align 4 ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[S]], ptr align 4 @s_baz, i64 8, i1 false) ; CHECK-NEXT: br i1 [[T5:%.*]], label [[BB6:%.*]], label [[BB22:%.*]] ; CHECK: bb6: ; CHECK-NEXT: invoke void @__cxa_throw(ptr null, ptr @i, ptr null) ; CHECK-NEXT: to label [[BB25:%.*]] unwind label [[BB9:%.*]] ; CHECK: bb9: ; CHECK-NEXT: [[T10:%.*]] = landingpad { ptr, i32 } ; CHECK-NEXT: catch ptr null ; CHECK-NEXT: br label [[BB13:%.*]] ; CHECK: bb13: ; CHECK-NEXT: [[T15:%.*]] = call ptr @__cxa_begin_catch(ptr null) ; CHECK-NEXT: br label [[BB23:%.*]] ; CHECK: bb22: ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[T]], ptr align 4 @s_baz, i64 8, i1 false) ; CHECK-NEXT: br label [[BB23]] ; CHECK: bb23: ; CHECK-NEXT: [[T18:%.*]] = load i32, ptr [[T]], align 4 ; CHECK-NEXT: [[T19:%.*]] = getelementptr inbounds [[STRUCT_S]], ptr [[T]], i32 0, i32 1 ; CHECK-NEXT: [[T20:%.*]] = load i32, ptr [[T19]], align 4 ; CHECK-NEXT: [[T21:%.*]] = add nsw i32 [[T18]], [[T20]] ; CHECK-NEXT: ret i32 [[T21]] ; CHECK: bb25: ; CHECK-NEXT: unreachable ; bb: %s = alloca %struct.s, align 4 %t = alloca %struct.s, align 4 call void @llvm.memcpy.p0.p0.i64(ptr align 4 %s, ptr align 4 @s_baz, i64 8, i1 false) br i1 %t5, label %bb6, label %bb22 bb6: ; preds = %bb invoke void @__cxa_throw(ptr null, ptr @i, ptr null) to label %bb25 unwind label %bb9 bb9: ; preds = %bb6 %t10 = landingpad { ptr, i32 } catch ptr null br label %bb13 bb13: ; preds = %bb9 %t15 = call ptr @__cxa_begin_catch(ptr null) br label %bb23 bb22: ; preds = %bb call void @llvm.memcpy.p0.p0.i64(ptr align 4 %t, ptr align 4 %s, i64 8, i1 false) br label %bb23 bb23: ; preds = %bb22, %bb13 %t18 = load i32, ptr %t, align 4 %t19 = getelementptr inbounds %struct.s, ptr %t, i32 0, i32 1 %t20 = load i32, ptr %t19, align 4 %t21 = add nsw i32 %t18, %t20 ret i32 %t21 bb25: ; preds = %bb6 unreachable } define void @memphi_with_unrelated_clobber(i1 %cond, ptr %arg, ptr noalias %a, ptr noalias %b, ptr noalias %c) { ; CHECK-LABEL: @memphi_with_unrelated_clobber( ; CHECK-NEXT: entry: ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[A:%.*]], ptr [[B:%.*]], i64 16, i1 false) ; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[EXIT:%.*]] ; CHECK: then: ; CHECK-NEXT: store i64 0, ptr [[ARG:%.*]], align 4 ; CHECK-NEXT: br label [[EXIT]] ; CHECK: exit: ; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[C:%.*]], ptr [[B]], i64 16, i1 false) ; CHECK-NEXT: ret void ; entry: call void @llvm.memcpy.p0.p0.i64(ptr %a, ptr %b, i64 16, i1 false) br i1 %cond, label %then, label %exit then: store i64 0, ptr %arg br label %exit exit: call void @llvm.memcpy.p0.p0.i64(ptr %c, ptr %a, i64 16, i1 false) ret void }