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2350e9f6b7
There are some kinds of metadata that are safe to propagate from the scalar instructions to the vector instructions (fpmath and tbaa currently). Regarding TBAA, one might worry about propagating it on if-converted loads and stores, because the metadata might have had a control dependency on the condition, and thus actually aliased with some other non-speculated memory access when the condition was false. However, this would be caught by the runtime overlap checks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213452 91177308-0d34-0410-b5e6-96231b3b80d8
45 lines
1.7 KiB
LLVM
45 lines
1.7 KiB
LLVM
; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -S | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: nounwind uwtable
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define i32 @test1(i32* nocapture %a, float* nocapture readonly %b) #0 {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds float* %b, i64 %indvars.iv
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%0 = load float* %arrayidx, align 4, !tbaa !0
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%conv = fptosi float %0 to i32
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%arrayidx2 = getelementptr inbounds i32* %a, i64 %indvars.iv
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store i32 %conv, i32* %arrayidx2, align 4, !tbaa !4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 1600
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret i32 0
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}
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; CHECK-LABEL: @test1
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; CHECK: load <4 x float>* %{{.*}}, align 4, !tbaa ![[TFLT:[0-9]+]]
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; CHECK: store <4 x i32> %{{.*}}, <4 x i32>* %{{.*}}, align 4, !tbaa ![[TINT:[0-9]+]]
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; CHECK: ret i32 0
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; CHECK-DAG: ![[TFLT]] = metadata !{metadata ![[TFLT1:[0-9]+]]
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; CHECK-DAG: ![[TFLT1]] = metadata !{metadata !"float"
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; CHECK-DAG: ![[TINT]] = metadata !{metadata ![[TINT1:[0-9]+]]
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; CHECK-DAG: ![[TINT1]] = metadata !{metadata !"int"
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attributes #0 = { nounwind uwtable }
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!0 = metadata !{metadata !1, metadata !1, i64 0}
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!1 = metadata !{metadata !"float", metadata !2, i64 0}
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!2 = metadata !{metadata !"omnipotent char", metadata !3, i64 0}
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!3 = metadata !{metadata !"Simple C/C++ TBAA"}
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!4 = metadata !{metadata !5, metadata !5, i64 0}
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!5 = metadata !{metadata !"int", metadata !2, i64 0}
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