Test Failure: Transforms/InstCombine/prevent-cmp-merge.ll

Test source: git

Log:

Source: <stdin>

----------------------------------------
define i1 @test1(i32 %lhs, i32 %rhs) {
%0:
  %xor = xor i32 %lhs, 5
  %cmp1 = icmp eq i32 %xor, 10
  %cmp2 = icmp eq i32 %xor, %rhs
  %sel = or i1 %cmp1, %cmp2
  ret i1 %sel
}
=>
define i1 @test1(i32 %lhs, i32 %rhs) {
%0:
  %xor = xor i32 %lhs, 5
  %cmp1 = icmp eq i32 %xor, 10
  %cmp2 = icmp eq i32 %xor, %rhs
  %sel = or i1 %cmp1, %cmp2
  ret i1 %sel
}
Transformation seems to be correct!


----------------------------------------
define i1 @test1_logical(i32 %lhs, i32 %rhs) {
%0:
  %xor = xor i32 %lhs, 5
  %cmp1 = icmp eq i32 %xor, 10
  %cmp2 = icmp eq i32 %xor, %rhs
  %sel = select i1 %cmp1, i1 1, i1 %cmp2
  ret i1 %sel
}
=>
define i1 @test1_logical(i32 %lhs, i32 %rhs) {
%0:
  %xor = xor i32 %lhs, 5
  %cmp1 = icmp eq i32 %xor, 10
  %cmp2 = icmp eq i32 %xor, %rhs
  %sel = or i1 %cmp1, %cmp2
  ret i1 %sel
}
Transformation doesn't verify!
ERROR: Target is more poisonous than source

Example:
i32 %lhs = #x0000000f (15)
i32 %rhs = poison

Source:
i32 %xor = #x0000000a (10)
i1 %cmp1 = #x1 (1)
i1 %cmp2 = poison
i1 %sel = #x1 (1)

Target:
i32 %xor = #x0000000a (10)
i1 %cmp1 = #x1 (1)
i1 %cmp2 = poison
i1 %sel = poison
Source value: #x1 (1)
Target value: poison


------------------- SMT STATS -------------------
Num queries: 5
Num invalid: 0
Num skips:   0
Num trivial: 6 (54.5%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     3 (60.0%)
Num UNSAT:   2 (40.0%)

stderr:

+ : 'RUN: at line 2'
+ /home/nlopes/alive2/build/opt-alive.sh -instcombine -S
+ /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/InstCombine/prevent-cmp-merge.ll

Alive2: Transform doesn't verify; aborting!
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/InstCombine/prevent-cmp-merge.ll

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