Comments (1)
When %a
is 0, the source function is UB. That means that the compiler is allowed to rewrite it in any way it wants. UB in source enables optimizations; it doesn't cause verification to fail.
On the other hand, UB in target is more dangerous. It fails verification, unless source was already UB for the same inputs.
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Related Issues (20)
- confusing CEX HOT 1
- make undef inputs default to off
- Incorrect bit layout for vectors of overaligned elements
- optimize indirect fn calls
- possible false alarm HOT 3
- load widening not working? HOT 1
- False positive when devirtualizing call with memory attributes
- unexpected memcmp() behavior HOT 3
- Inconsistent phi value after select based on undef value HOT 7
- Source and Target Example Values Diverge Before Source Code Does HOT 3
- unexpected result when tgt is asm
- Implicit conversion and static analysis warnings HOT 1
- arm-tv bug that won't repro in alive-tv HOT 2
- issue with returned arguments in asm memory mode HOT 4
- issue with aligned pointers
- Source function always being UB warning may be missing HOT 3
- undesirable poison in return value HOT 1
- target-side padding for non-byte-sized loads/stores HOT 1
- missed alarm? HOT 2
- `--print-options` and `--print-all-options` donβt. HOT 1
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