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JIT: reduce importer spilling for some stfld #51158

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Apr 14, 2021
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JIT: reduce importer spilling for some stfld #51158

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11 changes: 10 additions & 1 deletion src/coreclr/jit/importer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -15325,7 +15325,16 @@ void Compiler::impImportBlockCode(BasicBlock* block)
{
assert(tiObj);

if (impIsValueType(tiObj))
// If we can resolve the field to be within some local,
// then just spill that local.
//
GenTreeLclVarCommon* const lcl = obj->IsLocalAddrExpr();

if (lcl != nullptr)
{
impSpillLclRefs(lcl->GetLclNum());
}
else if (impIsValueType(tiObj))
{
impSpillEvalStack();
}
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