Florian Hahn
4233a15c9f
[FunctionAttrs] Handle zero writes in initializes inference.
...
ConstantRange's constructor asserts that the range not empty, except if
lower/upper are min or max values.
Check if the length is strictly positive instead of just non-negative so
std::nullopt is returned when the size is 0. If that's the case, the
access doesn't initialize anything.
This should fix a crash when building on macOS with ASan & UBsan after
https://github.com/llvm/llvm-project/pull/97373 /
https://github.com/llvm/llvm-project/pull/117104 landed:
https://green.lab.llvm.org/job/llvm.org/job/clang-stage2-cmake-RgSan/664/console
2025-01-18 20:01:07 +00:00
Nikita Popov
2d760a139e
[FunctionAttrs] Add test for initializes + byval (NFC)
2025-01-14 15:30:39 +01:00
Haopeng Liu
8daba2c13d
Skip negative length while inferring initializes attr ( #120874 )
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Bail out negative length while inferring initializes attr. Otherwise it
causes an assertion error:
`Attribute 'initializes' does not support unordered ranges`
2024-12-22 19:01:52 -08:00
Haopeng Liu
4d6e69143d
Add the initializes attribute inference ( #117104 )
...
reland https://github.com/llvm/llvm-project/pull/97373 after fixing
clang tests.
Confirmed with "ninja check-llvm" and "ninja check-clang"
2024-11-20 19:15:23 -08:00
Mikhail Goncharov
f77126c549
Revert "[FunctionAttrs] Add the "initializes" attribute inference ( #97373 )"
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This reverts commit 661c593850715881d2805a59e90e6d87d8b9fbb8.
Multiple buildbot failures, e.g. https://lab.llvm.org/buildbot/#/builders/108/builds/6096
2024-11-19 10:29:36 +01:00
Haopeng Liu
661c593850
[FunctionAttrs] Add the "initializes" attribute inference ( #97373 )
...
Add the "initializes" attribute inference.
This change is expected to have ~0.09% compile time regression, which
seems acceptable for interprocedural DSE.
https://llvm-compile-time-tracker.com/compare.php?from=9f10252c4ad7cffbbcf692fa9c953698f82ac4f5&to=56345c1cee4375eb5c28b8e7abf4803d20216b3b&stat=instructions%3Au
2024-11-18 21:36:05 -08:00
