Test Failure: Transforms/PhaseOrdering/unsigned-multiply-overflow-check.ll

Test source: git

Log:

Source: <stdin>

----------------------------------------
define i1 @will_not_overflow(i64 %arg, i64 %arg1) {
%bb:
  %t0 = icmp eq i64 %arg, 0
  br i1 %t0, label %bb5, label %bb2

%bb2:
  %t3 = udiv i64 -1, %arg
  %t4 = icmp ult i64 %t3, %arg1
  br label %bb5

%bb5:
  %t6 = phi i1 [ 0, %bb ], [ %t4, %bb2 ]
  ret i1 %t6
}
=>
define i1 @will_not_overflow(i64 %arg, i64 %arg1) {
%bb:
  %umul = umul_overflow {i64, i1, i56} %arg, %arg1
  %umul.ov = extractvalue {i64, i1, i56} %umul, 1
  ret i1 %umul.ov
}
Transformation doesn't verify!
ERROR: Target is more poisonous than source

Example:
i64 %arg = #x0000000000000000 (0)
i64 %arg1 = poison

Source:
i1 %t0 = #x1 (1)
i64 %t3 = #xffffffffffffffff (18446744073709551615, -1)
i1 %t4 = poison
i1 %t6 = #x0 (0)

Target:
{i64, i1, i56} %umul = { poison, poison, poison }
i1 %umul.ov = poison
Source value: #x0 (0)
Target value: poison


------------------- SMT STATS -------------------
Num queries: 2
Num invalid: 0
Num skips:   0
Num trivial: 2 (50.0%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     2 (100.0%)
Num UNSAT:   0 (0.0%)

stderr:

+ : 'RUN: at line 2'
+ /home/nlopes/alive2/build/opt-alive.sh -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S
+ /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/PhaseOrdering/unsigned-multiply-overflow-check.ll --check-prefix=SIMPLIFYCFG
+ : 'RUN: at line 3'
+ /home/nlopes/alive2/build/opt-alive.sh -instcombine -S
+ /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/PhaseOrdering/unsigned-multiply-overflow-check.ll --check-prefix=INSTCOMBINEONLY
+ : 'RUN: at line 4'
+ /home/nlopes/alive2/build/opt-alive.sh -instcombine -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S
+ /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/PhaseOrdering/unsigned-multiply-overflow-check.ll --check-prefix=INSTCOMBINESIMPLIFYCFGONLY
+ : 'RUN: at line 5'
+ /home/nlopes/alive2/build/opt-alive.sh -instcombine -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -instcombine -S
+ /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/PhaseOrdering/unsigned-multiply-overflow-check.ll --check-prefix=INSTCOMBINESIMPLIFYCFGINSTCOMBINE

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/PhaseOrdering/unsigned-multiply-overflow-check.ll --check-prefix=INSTCOMBINESIMPLIFYCFGINSTCOMBINE

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