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9f62954aaa
Vectorization cost of uniform load wasn't correctly calculated. As a result, a simple loop that loads a uniform value wasn't vectorized. Differential Revision: http://reviews.llvm.org/D18940 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265901 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
1.5 KiB
LLVM
48 lines
1.5 KiB
LLVM
; RUN: opt -basicaa -loop-vectorize -S -mcpu=core-avx2 < %s | FileCheck %s
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;float inc = 0.5;
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;void foo(float *A, unsigned N) {
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;
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; for (unsigned i=0; i<N; i++){
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; A[i] += inc;
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; }
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;}
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; CHECK-LABEL: foo
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; CHECK: vector.body
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; CHECK: load <8 x float>
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; CHECK: fadd <8 x float>
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; CHECK: store <8 x float>
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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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@inc = global float 5.000000e-01, align 4
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define void @foo(float* nocapture %A, i32 %N) #0 {
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entry:
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%cmp3 = icmp eq i32 %N, 0
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br i1 %cmp3, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
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%0 = load float, float* @inc, align 4
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%arrayidx = getelementptr inbounds float, float* %A, i64 %indvars.iv
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%1 = load float, float* %arrayidx, align 4
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%add = fadd float %0, %1
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store float %add, float* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %N
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br i1 %exitcond, label %for.end.loopexit, label %for.body
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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}
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