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4a45626e2f
Summary: Use MemorySSA, if requested, to do less conservative memory dependency checking. This change doesn't enable the MemorySSA enhanced EarlyCSE in the default pipelines, so should be NFC. Reviewers: dberlin, sanjoy, reames, majnemer Subscribers: mcrosier, llvm-commits Differential Revision: http://reviews.llvm.org/D19821 llvm-svn: 280279
16 lines
576 B
LLVM
16 lines
576 B
LLVM
; RUN: opt < %s -S -early-cse | FileCheck %s
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; RUN: opt < %s -S -basicaa -early-cse-memssa | FileCheck %s
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; Ensure we don't simplify away additions vectors of +0.0's (same as scalars).
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define <4 x float> @fV( <4 x float> %a) {
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; CHECK: %b = fadd <4 x float> %a, zeroinitializer
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%b = fadd <4 x float> %a, <float 0.0,float 0.0,float 0.0,float 0.0>
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ret <4 x float> %b
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}
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define <4 x float> @fW( <4 x float> %a) {
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; CHECK: ret <4 x float> %a
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%b = fadd <4 x float> %a, <float -0.0,float -0.0,float -0.0,float -0.0>
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ret <4 x float> %b
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}
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