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[MIR] Fix vreg flag vector memory leak #112479

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Merged
merged 4 commits into from
Oct 16, 2024
Merged

[MIR] Fix vreg flag vector memory leak #112479

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c1690d0
[MIR] Fix vreg flag vector memory leak
optimisan Oct 15, 2024
7d8bf51
Change to bit field
optimisan Oct 16, 2024
f4f550c
Error on setting flag again
optimisan Oct 16, 2024
4edbcec
Revert "Error on setting flag again"
optimisan Oct 16, 2024
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2 changes: 1 addition & 1 deletion llvm/include/llvm/CodeGen/MIRParser/MIParser.h
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,7 @@ struct VRegInfo {
} D;
Register VReg;
Register PreferredReg;
SmallVector<uint8_t> Flags;
uint8_t Flags = 0;
};

using Name2RegClassMap = StringMap<const TargetRegisterClass *>;
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2 changes: 1 addition & 1 deletion llvm/lib/CodeGen/MIRParser/MIRParser.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -703,7 +703,7 @@ bool MIRParserImpl::parseRegisterInfo(PerFunctionMIParsingState &PFS,
return error(FlagStringValue.SourceRange.Start,
Twine("use of undefined register flag '") +
FlagStringValue.Value + "'");
Info.Flags.push_back(FlagValue);
Info.Flags |= FlagValue;
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@arsenm arsenm Oct 16, 2024

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We should also catch if a flag is set multiple times

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@optimisan optimisan Oct 16, 2024

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Would a warning be better for it?

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@arsenm arsenm Oct 16, 2024

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No reason to be permissive

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@optimisan optimisan Oct 16, 2024

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Added the check but can't be tested till relanding the WWM_REG flag patch.

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@arsenm arsenm Oct 16, 2024

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Can just add the error in a separate PR

}
RegInfo.noteNewVirtualRegister(Info.VReg);
}
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