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[clr-interp] Emit INTOP_NEWMDARR only for array ctor #116544

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Merged
merged 7 commits into from
Jun 13, 2025
+10 −16
Merged

[clr-interp] Emit INTOP_NEWMDARR only for array ctor #116544

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d059290
Emit INTOP_NEWMDARR only for array ctor and use rank as dimension count
kotlarmilos Jun 11, 2025
6d38dee
Fix condition for INTOP_NEWMDARR
kotlarmilos Jun 11, 2025
93ea23c
Update INTOP_NEWMDARR to use numArgs for dimension count
kotlarmilos Jun 12, 2025
ffc84f7
Remove rank
kotlarmilos Jun 12, 2025
d1b7bce
Update src/coreclr/interpreter/compiler.cpp
kotlarmilos Jun 12, 2025
d23616b
Update src/coreclr/interpreter/compiler.cpp
kotlarmilos Jun 12, 2025
a05ebee
Merge branch 'main' into improvement/coreclr-interp-md-array-checks
kotlarmilos Jun 13, 2025
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16 changes: 8 additions & 8 deletions src/coreclr/interpreter/compiler.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2508,15 +2508,15 @@ void InterpCompiler::EmitCall(CORINFO_RESOLVED_TOKEN* constrainedClass, bool rea
}
else if ((callInfo.classFlags & CORINFO_FLG_ARRAY) && !readonly)
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Suggested change
else if ((callInfo.classFlags & CORINFO_FLG_ARRAY) && !readonly)
else if (callInfo.classFlags & CORINFO_FLG_ARRAY)

!readonly should not be needed here

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Instead, you can check for newobj opcode and then you do not need the condition below:

if ((callInfo.classFlags & CORINFO_FLG_ARRAY) && newObj)

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(It is what RuyJIT does - look for impImportNewObjArray.)

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Thanks!

{
CORINFO_SIG_INFO ctorSignature;
CORINFO_CLASS_HANDLE ctorClass;
CORINFO_CLASS_HANDLE arrayClsHnd = m_compHnd->getMethodClass(resolvedCallToken.hMethod);
uint32_t rank = m_compHnd->getArrayRank(arrayClsHnd);

m_compHnd->getMethodSig(resolvedCallToken.hMethod, &ctorSignature);
ctorClass = m_compHnd->getMethodClass(resolvedCallToken.hMethod);

AddIns(INTOP_NEWMDARR);
m_pLastNewIns->data[0] = GetDataItemIndex(ctorClass);
m_pLastNewIns->data[1] = numArgs;
if (callInfo.sig.retType == CORINFO_TYPE_VOID && callInfo.sig.numArgs == rank && (m_compHnd->getMethodAttribs(resolvedCallToken.hMethod) & CORINFO_FLG_CONSTRUCTOR) != 0)
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callInfo.sig.numArgs == rank condition is not 100% right. The multi-dimm array constructors can take rank or rank * 2 arguments.

The overload that takes rank * 2 arguments is not expressible in C#. It allows you to specify lower bounds.

{
AddIns(INTOP_NEWMDARR);
m_pLastNewIns->data[0] = GetDataItemIndex(arrayClsHnd);
m_pLastNewIns->data[1] = rank;
}
}
else
{
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