derek.holloway
7502bf64a4
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59 lines
2.0 KiB
LLVM
59 lines
2.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals
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; RUN: opt -passes=instcombine -S < %s | FileCheck %s
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;
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; Verify that instcombine preserves TBAA tags when converting a memcpy into
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; a scalar load and store.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind
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%A = type { float }
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define void @test1(ptr %a1, ptr %a2) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[A2:%.*]], align 4, !tbaa [[TBAA0:![0-9]+]]
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; CHECK-NEXT: store i32 [[TMP0]], ptr [[A1:%.*]], align 4, !tbaa [[TBAA0]]
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; CHECK-NEXT: ret void
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;
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entry:
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tail call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a1, ptr align 4 %a2, i64 4, i1 false), !tbaa !4 ; TAG_A
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ret void
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}
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%B = type { ptr }
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define ptr @test2() {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: store i1 true, ptr poison, align 1
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; CHECK-NEXT: ret ptr poison
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;
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%tmp = alloca %B, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 8 %tmp, ptr align 8 undef, i64 8, i1 false), !tbaa !7 ; TAG_B
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%tmp3 = load ptr, ptr %tmp
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ret ptr %tmp
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}
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!0 = !{!"root"}
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!1 = !{!0, !"char"}
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!2 = !{!1, !"float"}
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!3 = !{!1, i64 4, !"A", !2, i64 0, i64 4}
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!4 = !{!3, !3, i64 0, i64 4}
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!5 = !{!1, !"pointer"}
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!6 = !{!1, i64 8, !"B", !5, i64 0, i64 8}
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!7 = !{!6, !6, i64 0, i64 8}
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; Note that the memcpy() call in test2() transforms into an
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; undecorated 'store undef', so TAG_B is not present in the output.
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;.
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; CHECK: attributes #[[ATTR0:[0-9]+]] = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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;.
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; CHECK: [[TBAA0]] = !{[[META1:![0-9]+]], [[META1]], i64 0, i64 4}
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; CHECK: [[META1]] = !{[[META2:![0-9]+]], i64 4, !"A", [[META4:![0-9]+]], i64 0, i64 4}
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; CHECK: [[META2]] = !{[[META3:![0-9]+]], !"char"}
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; CHECK: [[META3]] = !{!"root"}
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; CHECK: [[META4]] = !{[[META2]], !"float"}
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;.
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