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75564e3514
This can happen as long as the instruction is not reachable. Instcombine does generate these unreachable malformed selects when doing RAUW git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160874 91177308-0d34-0410-b5e6-96231b3b80d8
50 lines
1.5 KiB
LLVM
50 lines
1.5 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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; Formerly crashed, PR8490.
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define fastcc double @gimp_operation_color_balance_map(float %value, double %highlights) nounwind readnone inlinehint {
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entry:
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; CHECK: gimp_operation_color_balance_map
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; CHECK: fsub double -0.000000
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%conv = fpext float %value to double
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%div = fdiv double %conv, 1.600000e+01
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%add = fadd double %div, 1.000000e+00
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%div1 = fdiv double 1.000000e+00, %add
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%sub = fsub double 1.075000e+00, %div1
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%sub24 = fsub double 1.000000e+00, %sub
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%add26 = fadd double %sub, 1.000000e+00
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%cmp86 = fcmp ogt double %highlights, 0.000000e+00
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%cond90 = select i1 %cmp86, double %sub24, double %add26
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%mul91 = fmul double %highlights, %cond90
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%add94 = fadd double undef, %mul91
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ret double %add94
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}
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; PR10180: same crash, but with vectors
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define <4 x float> @foo(i1 %b, <4 x float> %x, <4 x float> %y, <4 x float> %z) {
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; CHECK: @foo
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; CHECK: fsub <4 x float>
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; CHECK: select
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; CHECK: fadd <4 x float>
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%a = fadd <4 x float> %x, %y
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%sub = fsub <4 x float> %x, %z
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%sel = select i1 %b, <4 x float> %a, <4 x float> %sub
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ret <4 x float> %sel
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}
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; CHECK: @test3
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define i32 @test3(i1 %bool, i32 %a) {
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entry:
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%cond = or i1 %bool, true
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br i1 %cond, label %return, label %xpto
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; technically reachable, but this malformed IR may appear as a result of constant propagation
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xpto:
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%select = select i1 %bool, i32 %a, i32 %select
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%select2 = select i1 %bool, i32 %select2, i32 %a
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%sum = add i32 %select, %select2
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ret i32 %sum
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return:
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ret i32 7
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}
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