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| author | Arnold Schwaighofer <aschwaighofer@apple.com> | 2014-03-05 21:10:47 +0000 |
|---|---|---|
| committer | Arnold Schwaighofer <aschwaighofer@apple.com> | 2014-03-05 21:10:47 +0000 |
| commit | ab12363c02376563fd70af2a2865d381109e2778 (patch) | |
| tree | 55a5e6008fcdadcb9d60f5e7761f53d040f01a92 /llvm/test/Transforms/LoopVectorize | |
| parent | 191b95125a5638d3931094a98a658bd730ff1cbb (diff) | |
| download | bcm5719-llvm-ab12363c02376563fd70af2a2865d381109e2778.tar.gz bcm5719-llvm-ab12363c02376563fd70af2a2865d381109e2778.zip | |
LoopVectorizer: Preserve fast-math flags
Fixes PR19045.
llvm-svn: 203008
Diffstat (limited to 'llvm/test/Transforms/LoopVectorize')
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/flags.ll | 26 | ||||
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/float-reduction.ll | 2 |
2 files changed, 27 insertions, 1 deletions
diff --git a/llvm/test/Transforms/LoopVectorize/flags.ll b/llvm/test/Transforms/LoopVectorize/flags.ll index a4ebb428488..21d09372d54 100644 --- a/llvm/test/Transforms/LoopVectorize/flags.ll +++ b/llvm/test/Transforms/LoopVectorize/flags.ll @@ -51,3 +51,29 @@ define i32 @flags2(i32 %n, i32* nocapture %A) nounwind uwtable ssp { ._crit_edge: ; preds = %.lr.ph, %0 ret i32 undef } + +; Make sure we copy fast math flags and use them for the final reduction. +; CHECK-LABEL: fast_math +; CHECK: load <4 x float> +; CHECK: fadd fast <4 x float> +; CHECK: br +; CHECK: fadd fast <4 x float> +; CHECK: fadd fast <4 x float> +define float @fast_math(float* noalias %s) { +entry: + br label %for.body + +for.body: + %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] + %q.04 = phi float [ 0.000000e+00, %entry ], [ %add, %for.body ] + %arrayidx = getelementptr inbounds float* %s, i64 %indvars.iv + %0 = load float* %arrayidx, align 4 + %add = fadd fast float %q.04, %0 + %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 + %exitcond = icmp eq i64 %indvars.iv.next, 256 + br i1 %exitcond, label %for.end, label %for.body + +for.end: + %add.lcssa = phi float [ %add, %for.body ] + ret float %add.lcssa +} diff --git a/llvm/test/Transforms/LoopVectorize/float-reduction.ll b/llvm/test/Transforms/LoopVectorize/float-reduction.ll index c45098dd2c3..0dfbab07279 100644 --- a/llvm/test/Transforms/LoopVectorize/float-reduction.ll +++ b/llvm/test/Transforms/LoopVectorize/float-reduction.ll @@ -3,7 +3,7 @@ target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" target triple = "x86_64-apple-macosx10.8.0" ;CHECK-LABEL: @foo( -;CHECK: fadd <4 x float> +;CHECK: fadd fast <4 x float> ;CHECK: ret define float @foo(float* nocapture %A, i32* nocapture %n) nounwind uwtable readonly ssp { entry: |
