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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() {
[Reassociate] regenerate test checks; NFC llvm-svn: 317841
2017-11-10 06:41:39 +08:00
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[T1:%.*]] = tail call <4 x float> @blam()
; CHECK-NEXT: [[T1_NEG:%.*]] = fsub fast <4 x float> <float -0.000000e+00, float -0.000000e+00, float -0.000000e+00, float -0.000000e+00>, [[T1]]
; CHECK-NEXT: [[T24:%.*]] = fadd fast <4 x float> [[T1_NEG]], fadd (<4 x float> undef, <4 x float> undef)
; CHECK-NEXT: tail call void @wombat(<4 x float> [[T24]])
; CHECK-NEXT: ret void
;
%t1 = tail call <4 x float> @blam()
%t23 = fsub fast <4 x float> undef, %t1
%t24 = fadd fast <4 x float> %t23, undef
tail call void @wombat(<4 x float> %t24)
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
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() {
[Reassociate] regenerate test checks; NFC llvm-svn: 317841
2017-11-10 06:41:39 +08:00
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[T15:%.*]] = fsub fast half undef, undef
; CHECK-NEXT: [[T15_NEG:%.*]] = fsub fast half 0xH8000, [[T15]]
; CHECK-NEXT: [[T18:%.*]] = fadd fast half [[T15_NEG]], fadd (half undef, half undef)
; CHECK-NEXT: ret half [[T18]]
;
%t15 = fsub fast half undef, undef
%t17 = fsub fast half undef, %t15
%t18 = fadd fast half undef, %t17
ret half %t18
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
}
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>)