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[MachinePipeliner] Use Register. NFC #130165

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Merged
merged 1 commit into from
Mar 7, 2025
Merged

[MachinePipeliner] Use Register. NFC #130165

merged 1 commit into from
Mar 7, 2025

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@topperc
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@topperc topperc commented Mar 6, 2025

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@topperc topperc requested a review from arsenm March 6, 2025 19:38
@topperc topperc merged commit f5eeeec into llvm:main Mar 7, 2025
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@topperc topperc deleted the pr/machinepipe branch March 7, 2025 02:39
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vitalybuka commented Mar 7, 2025

Looks like this UAF is from this patch https://lab.llvm.org/buildbot/#/builders/169/builds/9150

@vitalybuka vitalybuka mentioned this pull request Mar 7, 2025
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topperc commented Mar 7, 2025

Looks like this UAF is from this patch https://lab.llvm.org/buildbot/#/builders/169/builds/9150

Thanks I'll take a look.

vitalybuka added a commit that referenced this pull request Mar 7, 2025
@vitalybuka
[MachinePipeliner] Fix use-after-free coping values of the same Dense…
4bc3592 
…Map (#130311)

After #130165.

In the code: `VRMap[CurStageNum][Def] = VRMap[CurStageNum][LoopVal]`
`VRMap[CurStageNum][LoopVal]` calculates a reference before
`VRMap[CurStageNum][Def]` which may rehash the DenseMap.
Then the reference can be dead.
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@arsenm arsenm arsenm approved these changes

@hstk30-hw hstk30-hw hstk30-hw approved these changes

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@topperc @vitalybuka @arsenm @hstk30-hw