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SLPVectorizer: Ignore users that are insertelements we can reschedule them

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Patch by Arch D. Robison!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205018 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Arnold Schwaighofer
2014-03-28 17:21:22 +00:00
parent e2591680b4
commit b48eb2cdaa
2 changed files with 88 additions and 29 deletions
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24
test/Transforms/SLPVectorizer/X86/insert-element-build-vector.ll
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@@ -194,4 +194,28 @@ define <4 x float> @simple_select_partial_vector(<4 x float> %a, <4 x float> %b,
ret <4 x float> %rb
}
; Make sure that vectorization happens even if insertelements operations
; must be rescheduled. The case here is from compiling Julia.
define <4 x float> @reschedule_extract(<4 x float> %a, <4 x float> %b) {
; CHECK-LABEL: @reschedule_extract(
; 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
%v0 = insertelement <4 x float> undef, float %c0, i32 0
%a1 = extractelement <4 x float> %a, i32 1
%b1 = extractelement <4 x float> %b, i32 1
%c1 = fadd float %a1, %b1
%v1 = insertelement <4 x float> %v0, float %c1, i32 1
%a2 = extractelement <4 x float> %a, i32 2
%b2 = extractelement <4 x float> %b, i32 2
%c2 = fadd float %a2, %b2
%v2 = insertelement <4 x float> %v1, float %c2, i32 2
%a3 = extractelement <4 x float> %a, i32 3
%b3 = extractelement <4 x float> %b, i32 3
%c3 = fadd float %a3, %b3
%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" }