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      1 ; RUN: opt -reassociate %s -S -o - | FileCheck %s
      2 
      3 ; Reassociate pass used to crash on these example
      4 
      5 
      6 define float @undef1() {
      7 wrapper_entry:
      8 ; CHECK-LABEL: @undef1
      9 ; CHECK: ret float fadd (float undef, float fadd (float undef, float fadd (float fsub (float -0.000000e+00, float undef), float fsub (float -0.000000e+00, float undef))))
     10   %0 = fadd fast float undef, undef
     11   %1 = fsub fast float undef, %0
     12   %2 = fadd fast float undef, %1
     13   ret float %2
     14 }
     15 
     16 define void @undef2() {
     17 wrapper_entry:
     18 ; CHECK-LABEL: @undef2
     19 ; CHECK: unreachable
     20   %0 = fadd fast float undef, undef
     21   %1 = fadd fast float %0, 1.000000e+00
     22   %2 = fsub fast float %0, %1
     23   %3 = fmul fast float %2, 2.000000e+00
     24   unreachable
     25 }
     26