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SIL: Lower captures to boxes with an appropriate generic context.

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Officially kick SILBoxType over to be "nominal" in its layout, with generic layouts structurally parameterized only by formal types. Change SIL to lower a capture to a nongeneric box when possible, or a box capturing the enclosing generic context when necessary.
This commit is contained in:
Joe Groff
2016-12-13 17:48:30 -08:00
parent 464a47430d
commit 4444d83756
72 changed files with 668 additions and 554 deletions
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7
lib/SILOptimizer/Transforms/AllocBoxToStack.cpp
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@@ -553,7 +553,12 @@ PromotedParamCloner::initCloned(SILFunction *Orig, IsFragile_t Fragile,
auto boxTy = param.getType()->castTo<SILBoxType>();
assert(boxTy->getLayout()->getFields().size() == 1
&& "promoting compound box not implemented");
auto paramTy = boxTy->getFieldType(Orig->getModule(), 0);
SILType paramTy;
{
Lowering::GenericContextScope scope(Orig->getModule().Types,
OrigFTI->getGenericSignature());
paramTy = boxTy->getFieldType(Orig->getModule(), 0);
}
auto promotedParam = SILParameterInfo(paramTy.getSwiftRValueType(),
ParameterConvention::Indirect_InoutAliasable);
ClonedInterfaceArgTys.push_back(promotedParam);