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Fix an SSA bug from the ASG refactoring - #86108
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Recording PHIs from analyzable stores is a correctness requirement.
ghost
commented
May 11, 2023
Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch Issue DetailsThe SSA renaming code was changed in an incompatible way s.t. memory stores in protected blocks were no longer considered to induce PHIs in the corresponding handlers.
|
| for (GenTree* const tree : stmt->TreeList()) | ||
| { | ||
| if (tree->OperIsSsaDef()) | ||
| if (tree->OperIsStore() || tree->OperIs(GT_CALL)) |
ContributorAuthor
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In actuality the same problem exists for un-analyzable stores as well. But that is a pre-existing issue.
Reproduction
[MethodImpl(MethodImplOptions.NoInlining | MethodImplOptions.AggressiveOptimization)]
public staticboolProblem()
{
[MethodImpl(MethodImplOptions.NoInlining)]
staticvoidThrow()
{
_intStatic = 1;
thrownewException();
}
_intStatic = 2;
try
{
Throw();
_intStatic = 2;
}
catch (Exception)
{
if (_intStatic == 2)
{
returntrue;
}
}
returnfalse;
}Filed #86112 for this.
SingleAccretion
marked this pull request as ready for review
May 11, 2023 20:30
SingleAccretion
commented
May 11, 2023
ContributorAuthor
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The SSA renaming code was changed in an incompatible way s.t. memory stores in protected blocks were no longer considered to induce PHIs in the corresponding handlers.