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9ac5f5bce3
Fixes issue identified by @nemanjai (Nemanja Ivanovic) in D62963 / rL363040 - infinite loop due to GetNegatedExpression fighting combineRepeatedFPDivisors resulting in fneg(fdiv(x,splat)) -> fneg(fmul(x,1.0/splat)) -> fmul(x,-1.0/splat) -> fmul(x,(-1.0 * 1.0)/splat) ...... llvm-svn: 364326
33 lines
1.3 KiB
LLVM
33 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=powerpc64le-unknown-unknown | FileCheck %s
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; Infinite loop identified in D62963.
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define <4 x double> @fneg_fdiv_splat(double %a0, <4 x double> %a1) {
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; CHECK-LABEL: fneg_fdiv_splat:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: # kill: def $f1 killed $f1 def $vsl1
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; CHECK-NEXT: xxspltd 0, 1, 0
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; CHECK-NEXT: addis 3, 2, .LCPI0_0@toc@ha
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; CHECK-NEXT: addi 3, 3, .LCPI0_0@toc@l
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; CHECK-NEXT: lxvd2x 1, 0, 3
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; CHECK-NEXT: addis 3, 2, .LCPI0_1@toc@ha
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; CHECK-NEXT: xvredp 2, 0
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; CHECK-NEXT: addi 3, 3, .LCPI0_1@toc@l
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; CHECK-NEXT: xxswapd 1, 1
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; CHECK-NEXT: xvnmsubadp 1, 2, 0
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; CHECK-NEXT: xvmaddadp 2, 2, 1
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; CHECK-NEXT: lxvd2x 1, 0, 3
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; CHECK-NEXT: xxswapd 1, 1
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; CHECK-NEXT: xvmaddadp 1, 0, 2
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; CHECK-NEXT: xvmsubadp 2, 2, 1
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; CHECK-NEXT: xvmuldp 34, 34, 2
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; CHECK-NEXT: xvmuldp 35, 35, 2
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; CHECK-NEXT: blr
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entry:
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%splat.splatinsert = insertelement <4 x double> undef, double %a0, i32 0
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%splat.splat = shufflevector <4 x double> %splat.splatinsert, <4 x double> undef, <4 x i32> zeroinitializer
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%div = fdiv fast <4 x double> %a1, %splat.splat
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%sub = fsub fast <4 x double> <double 0.000000e+00, double 0.000000e+00, double 0.000000e+00, double 0.000000e+00>, %div
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ret <4 x double> %sub
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}
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