derek.holloway
7502bf64a4
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57 lines
2.2 KiB
LLVM
57 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -passes=gvn -S < %s | FileCheck %s --check-prefixes=CHECK,MDEP
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; RUN: opt -passes='gvn<memoryssa>' -S < %s | FileCheck %s --check-prefixes=CHECK,MSSA
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target datalayout = "e-p:64:64:64"
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; GVN should preserve the TBAA tag on loads when doing PRE.
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define void @test(ptr %P, ptr %Q, i1 %arg) nounwind {
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; CHECK-LABEL: define void @test(
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; CHECK-SAME: ptr [[P:%.*]], ptr [[Q:%.*]], i1 [[ARG:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: br i1 [[ARG]], label %[[BB_NPH:.*]], label %[[FOR_END:.*]]
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; CHECK: [[BB_NPH]]:
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; CHECK-NEXT: [[TMP33_PRE:%.*]] = load i16, ptr [[P]], align 2, !tbaa [[SHORT_TBAA0:![0-9]+]]
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; CHECK-NEXT: br label %[[FOR_BODY:.*]]
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; CHECK: [[FOR_BODY]]:
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; CHECK-NEXT: [[TMP33:%.*]] = phi i16 [ 0, %[[FOR_BODY]] ], [ [[TMP33_PRE]], %[[BB_NPH]] ]
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; CHECK-NEXT: store i16 [[TMP33]], ptr [[Q]], align 2
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; CHECK-NEXT: store i16 0, ptr [[P]], align 2, !tbaa [[SHORT_TBAA0]]
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; CHECK-NEXT: br i1 false, label %[[FOR_BODY_FOR_END_CRIT_EDGE:.*]], label %[[FOR_BODY]]
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; CHECK: [[FOR_BODY_FOR_END_CRIT_EDGE]]:
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; CHECK-NEXT: br label %[[FOR_END]]
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; CHECK: [[FOR_END]]:
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 %arg, label %bb.nph, label %for.end
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bb.nph: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body, %bb.nph
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%tmp33 = load i16, ptr %P, align 2, !tbaa !0
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store i16 %tmp33, ptr %Q
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store i16 0, ptr %P, align 2, !tbaa !0
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br i1 false, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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}
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!0 = !{!3, !3, i64 0}
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!1 = !{!"omnipotent char", !2}
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!2 = !{!"Simple C/C++ TBAA"}
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!3 = !{!"short", !1}
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;.
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; CHECK: [[SHORT_TBAA0]] = !{[[META1:![0-9]+]], [[META1]], i64 0}
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; CHECK: [[META1]] = !{!"short", [[META2:![0-9]+]]}
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; CHECK: [[META2]] = !{!"omnipotent char", [[META3:![0-9]+]]}
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; CHECK: [[META3]] = !{!"Simple C/C++ TBAA"}
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;.
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;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
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; MDEP: {{.*}}
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; MSSA: {{.*}}
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