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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -passes=memcpyopt -S %s -verify-memoryssa | FileCheck %s3 4%T = type { i8, i32 }5 6; A global constant of %T7@C = external constant %T8 9; Ensure load-store forwarding of an aggregate is interpreted as10; a memmove when the source and dest may alias11define void @test_memmove(ptr align 8 %a, ptr align 16 %b) {12; CHECK-LABEL: @test_memmove(13; CHECK-NEXT: call void @llvm.memmove.p0.p0.i64(ptr align 16 [[B:%.*]], ptr align 8 [[A:%.*]], i64 8, i1 false)14; CHECK-NEXT: ret void15;16 %val = load %T, ptr %a, align 817 store %T %val, ptr %b, align 1618 ret void19}20 21; Ensure load-store forwarding of an aggregate is interpreted as22; a memcpy when the source and dest do not alias23define void @test_memcpy(ptr noalias align 8 %a, ptr noalias align 16 %b) {24; CHECK-LABEL: @test_memcpy(25; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 16 [[B:%.*]], ptr align 8 [[A:%.*]], i64 8, i1 false)26; CHECK-NEXT: ret void27;28 %val = load %T, ptr %a, align 829 store %T %val, ptr %b, align 1630 ret void31}32 33define void @test_memcpy_constant(ptr %d) {34; CHECK-LABEL: @test_memcpy_constant(35; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 16 [[D:%.*]], ptr align 8 @C, i64 8, i1 false)36; CHECK-NEXT: ret void37;38 %val = load %T, ptr @C, align 839 store %T %val, ptr %d, align 1640 ret void41}42 43; memcpy(%d, %a) should not be generated since store2 may-aliases load %a.44define void @f(ptr %a, ptr %b, ptr %c, ptr %d) {45; CHECK-LABEL: @f(46; CHECK-NEXT: [[VAL:%.*]] = load [[T:%.*]], ptr [[A:%.*]], align 4, !alias.scope !047; CHECK-NEXT: store [[T]] { i8 23, i32 23 }, ptr [[B:%.*]], align 4, !alias.scope !348; CHECK-NEXT: store [[T]] { i8 44, i32 44 }, ptr [[C:%.*]], align 4, !alias.scope !6, !noalias !349; CHECK-NEXT: store [[T]] [[VAL]], ptr [[D:%.*]], align 4, !alias.scope !9, !noalias !1250; CHECK-NEXT: ret void51;52 %val = load %T, ptr %a, !alias.scope !{!10}53 54 ; store1 may-aliases the load55 store %T { i8 23, i32 23 }, ptr %b, !alias.scope !{!11}56 57 ; store2 may-aliases the load and store358 store %T { i8 44, i32 44 }, ptr %c, !alias.scope !{!12}, !noalias !{!11}59 60 ; store361 store %T %val, ptr %d, !alias.scope !{!13}, !noalias !{!10, !11}62 ret void63}64 65!0 = !{!0}66!1 = !{!1}67!2 = !{!2}68!3 = !{!3}69 70!10 = !{ !10, !0 }71!11 = !{ !11, !1 }72!12 = !{ !12, !2 }73!13 = !{ !13, !3 }74