Test source: git
Source: <stdin>
----------------------------------------
define i32 @foo(i32 %x, i32 %y) {
%0:
%1 = xor i32 %x, 4294967295
%2 = xor i32 %y, 4294967295
%3 = icmp ugt i32 %1, %2
%4 = select i1 %3, i32 %2, i32 %1
ret i32 %4
}
=>
define i32 @foo(i32 %x, i32 %y) {
%0:
%1 = icmp ugt i32 %x, %y
%2 = select i1 %1, i32 %x, i32 %y
%3 = xor i32 %2, 4294967295
ret i32 %3
}
Transformation doesn't verify!
ERROR: Target's return value is more undefined
Example:
i32 %x = #xffffffff (4294967295, -1)
i32 %y = undef
Source:
i32 %1 = #x00000000 (0)
i32 %2 = #xffffffff (4294967295, -1) [based on undef value]
i1 %3 = #x0 (0)
i32 %4 = #x00000000 (0)
Target:
i1 %1 = #x0 (0)
i32 %2 = #x00000000 (0)
i32 %3 = #xffffffff (4294967295, -1)
Source value: #x00000000 (0)
Target value: #xffffffff (4294967295, -1)
------------------- SMT STATS -------------------
Num queries: 4
Num invalid: 0
Num skips: 0
Num trivial: 13 (76.5%)
Num timeout: 1 (25.0%)
Num errors: 0 (0.0%)
Num SAT: 2 (50.0%)
Num UNSAT: 1 (25.0%)
Alive2: Transform doesn't verify; aborting!
+ : 'RUN: at line 1' + /home/nlopes/alive2/build/opt-alive.sh -instcombine -S + /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/InstCombine/select-pr39595.ll FileCheck error: '<stdin>' is empty. FileCheck command line: /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/InstCombine/select-pr39595.ll
NOTE: This test would pass if undef didn't exist!