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31 lines
930 B
LLVM
31 lines
930 B
LLVM
; RUN: opt -tbaa -basicaa -gvn -S < %s | FileCheck %s
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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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; CHECK: @test
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; CHECK: %tmp33.pre = load i16* %P, align 2, !tbaa !0
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; CHECK: br label %for.body
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define void @test(i16 *%P, i16* %Q) nounwind {
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entry:
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br i1 undef, 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* %P, align 2, !tbaa !0
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store i16 %tmp33, i16* %Q
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store i16 0, i16* %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 = metadata !{metadata !"short", metadata !1}
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!1 = metadata !{metadata !"omnipotent char", metadata !2}
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!2 = metadata !{metadata !"Simple C/C++ TBAA", null}
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