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| author | Arnold Schwaighofer <aschwaighofer@apple.com> | 2014-03-28 17:21:32 +0000 |
|---|---|---|
| committer | Arnold Schwaighofer <aschwaighofer@apple.com> | 2014-03-28 17:21:32 +0000 |
| commit | ce3623782657d77cefbd03ab0d545a0805e9c5e9 (patch) | |
| tree | 0b58669f05abafdadeee4b15da83e55acf1b2d04 /test | |
| parent | aa0a2a35f830e3bc2078c0054349a102b4444ea4 (diff) | |
| download | llvm-ce3623782657d77cefbd03ab0d545a0805e9c5e9.tar.gz llvm-ce3623782657d77cefbd03ab0d545a0805e9c5e9.tar.bz2 llvm-ce3623782657d77cefbd03ab0d545a0805e9c5e9.tar.xz | |
SLPVectorizer: Take credit for free extractelement instructions
Extract element instructions that will be removed when vectorzing lower the
cost.
Patch by Arch D. Robison!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205020 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/SLPVectorizer/X86/insert-element-build-vector.ll | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/test/Transforms/SLPVectorizer/X86/insert-element-build-vector.ll b/test/Transforms/SLPVectorizer/X86/insert-element-build-vector.ll index a6a7f32bfc..620292bdaf 100644 --- a/test/Transforms/SLPVectorizer/X86/insert-element-build-vector.ll +++ b/test/Transforms/SLPVectorizer/X86/insert-element-build-vector.ll @@ -1,4 +1,5 @@ ; RUN: opt -S -slp-vectorizer -slp-threshold=-10000 < %s | FileCheck %s +; RUN: opt -S -slp-vectorizer -slp-threshold=0 < %s | FileCheck %s -check-prefix=ZEROTHRESH 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-n8:16:32:64-S128" target triple = "x86_64-apple-macosx10.8.0" @@ -218,4 +219,28 @@ define <4 x float> @reschedule_extract(<4 x float> %a, <4 x float> %b) { ret <4 x float> %v3 } +; Check that cost model for vectorization takes credit for +; instructions that are erased. +define <4 x float> @take_credit(<4 x float> %a, <4 x float> %b) { +; ZEROTHRESH-LABEL: @take_credit( +; ZEROTHRESH-CHECK: %1 = fadd <4 x float> %a, %b + %a0 = extractelement <4 x float> %a, i32 0 + %b0 = extractelement <4 x float> %b, i32 0 + %c0 = fadd float %a0, %b0 + %a1 = extractelement <4 x float> %a, i32 1 + %b1 = extractelement <4 x float> %b, i32 1 + %c1 = fadd float %a1, %b1 + %a2 = extractelement <4 x float> %a, i32 2 + %b2 = extractelement <4 x float> %b, i32 2 + %c2 = fadd float %a2, %b2 + %a3 = extractelement <4 x float> %a, i32 3 + %b3 = extractelement <4 x float> %b, i32 3 + %c3 = fadd float %a3, %b3 + %v0 = insertelement <4 x float> undef, float %c0, i32 0 + %v1 = insertelement <4 x float> %v0, float %c1, i32 1 + %v2 = insertelement <4 x float> %v1, float %c2, i32 2 + %v3 = insertelement <4 x float> %v2, float %c3, i32 3 + ret <4 x float> %v3 +} + attributes #0 = { nounwind ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } |