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[LoopVectorizer] Enable support for floating-point subtraction reductions

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215200 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
James Molloy
2014-08-08 12:41:08 +00:00
parent 3a106a2813
commit 414df79b80
2 changed files with 24 additions and 1 deletions
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22
test/Transforms/LoopVectorize/float-reduction.ll
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@@ -23,3 +23,25 @@ for.body: ; preds = %for.body, %entry
for.end: ; preds = %for.body
ret float %add
}
;CHECK-LABEL: @foosub(
;CHECK: fsub fast <4 x float>
;CHECK: ret
define float @foosub(float* nocapture %A, i32* nocapture %n) nounwind uwtable readonly ssp {
entry:
br label %for.body
for.body: ; preds = %for.body, %entry
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
%sum.04 = phi float [ 0.000000e+00, %entry ], [ %sub, %for.body ]
%arrayidx = getelementptr inbounds float* %A, i64 %indvars.iv
%0 = load float* %arrayidx, align 4
%sub = fsub fast float %sum.04, %0
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, 200
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body
ret float %sub
}