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Only look for exceptVars when resolving live-out EH vars #58243

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merged 2 commits into from
Aug 30, 2021

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@kunalspathak kunalspathak commented Aug 27, 2021

When resolving ResolveJoin edge for live out EH vars, we should only consider the EH var register candidates instead of all the register candidates.

Fixes: #58083

@dotnet-issue-labeler dotnet-issue-labeler bot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Aug 27, 2021
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ghost commented Aug 27, 2021

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Issue Details

When resolving ResolveJoin edge, only consider except var

Author: kunalspathak
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area-CodeGen-coreclr

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Failures related to #42101 and #53551

@kunalspathak kunalspathak marked this pull request as ready for review August 27, 2021 21:26
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@dotnet/jit-contrib

@kunalspathak kunalspathak changed the title Only look for exceptVars Only look for exceptVars when resolving live-out EH vars Aug 27, 2021
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I have run superpmi-replay on jitstressregs and it is green. No asmdiff although it is surprising that how this oversight was not caught until now.

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Since this issue existing pre-.NET6 and this is not customer reported issue but something that fuzzer found, I am hesitant to port it back to .NET6.

@kunalspathak kunalspathak merged commit e0e7bfc into dotnet:main Aug 30, 2021
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ARM64: Assertion failed 'interval->isWriteThru'/runtime crash in release
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