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llvm-project/llvm/test/Transforms/Reassociate/fp-expr.ll

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Fix a pair of issues that caused an infinite loop in reassociate. Terrifyingly, one of them is a mishandling of floating point vectors in Constant::isZero(). How exactly this issue survived this long is beyond me. llvm-svn: 253655
2015-11-20 16:16:13 +08:00
; RUN: opt -S -reassociate < %s | FileCheck %s
define void @test1() {
; CHECK-LABEL: @test1
; CHECK: call
; CHECK: fsub
; CHECK: fadd
%tmp = tail call <4 x float> @blam()
%tmp23 = fsub fast <4 x float> undef, %tmp
%tmp24 = fadd fast <4 x float> %tmp23, undef
tail call void @wombat(<4 x float> %tmp24)
ret void
}
Fix another infinite loop in Reassociate caused by Constant::isZero(). Not all zero vectors are ConstantDataVector's. llvm-svn: 253723
2015-11-21 06:34:48 +08:00
define half @test2() {
; CHECK-LABEL: @test2
; CHECK: fsub
; CHECK: fsub
; CHECK: fadd
%tmp15 = fsub fast half undef, undef
%tmp17 = fsub fast half undef, %tmp15
%tmp18 = fadd fast half undef, %tmp17
ret half %tmp18
}
Fix a pair of issues that caused an infinite loop in reassociate. Terrifyingly, one of them is a mishandling of floating point vectors in Constant::isZero(). How exactly this issue survived this long is beyond me. llvm-svn: 253655
2015-11-20 16:16:13 +08:00
; Function Attrs: optsize
declare <4 x float> @blam()
; Function Attrs: optsize
declare void @wombat(<4 x float>)