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[StackNesting] Handle stackAlloc builtins.

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Both stackAlloc and unprotectedStackAlloc are paired with stackDealloc
builtins.
This commit is contained in:
Nate Chandler
2023-05-25 07:55:33 -07:00
parent 1cd2bdfacf
commit ddd0157abb
1 changed files with 11 additions and 0 deletions
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11
lib/SILOptimizer/Utils/StackNesting.cpp
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@@ -219,6 +219,17 @@ static SILInstruction *createDealloc(SILInstruction *Alloc,
return B.createDeallocStackRef(Location, cast<AllocRefInstBase>(Alloc));
case SILInstructionKind::AllocPackInst:
return B.createDeallocPack(Location, cast<AllocPackInst>(Alloc));
case SILInstructionKind::BuiltinInst: {
auto *bi = cast<BuiltinInst>(Alloc);
assert(bi->getBuiltinKind() == BuiltinValueKind::StackAlloc ||
bi->getBuiltinKind() == BuiltinValueKind::UnprotectedStackAlloc);
auto &context = Alloc->getFunction()->getModule().getASTContext();
auto identifier =
context.getIdentifier(getBuiltinName(BuiltinValueKind::StackDealloc));
return B.createBuiltin(Location, identifier,
SILType::getEmptyTupleType(context),
SubstitutionMap(), {bi});
}
default:
llvm_unreachable("unknown stack allocation");
}