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Make SILInstruction no longer a subclass of ValueBase and

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introduce a common superclass, SILNode.

This is in preparation for allowing instructions to have multiple
results.  It is also a somewhat more elegant representation for
instructions that have zero results.  Instructions that are known
to have exactly one result inherit from a class, SingleValueInstruction,
that subclasses both ValueBase and SILInstruction.  Some care must be
taken when working with SILNode pointers and testing for equality;
please see the comment on SILNode for more information.

A number of SIL passes needed to be updated in order to handle this
new distinction between SIL values and SIL instructions.

Note that the SIL parser is now stricter about not trying to assign
a result value from an instruction (like 'return' or 'strong_retain')
that does not produce any.
This commit is contained in:
John McCall
2017-09-21 00:17:10 -07:00
parent 6d9294f565
commit ab3f77baf2
195 changed files with 6114 additions and 4985 deletions
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67
lib/SILOptimizer/Analysis/ArraySemantic.cpp
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@@ -112,27 +112,52 @@ bool swift::ArraySemanticsCall::isValidSignature() {
}
/// Match array semantic calls.
swift::ArraySemanticsCall::ArraySemanticsCall(ValueBase *V,
StringRef SemanticStr,
bool MatchPartialName) {
if (auto *AI = dyn_cast<ApplyInst>(V))
if (auto *Fn = AI->getReferencedFunction())
if ((MatchPartialName &&
Fn->hasSemanticsAttrThatStartsWith(SemanticStr)) ||
(!MatchPartialName && Fn->hasSemanticsAttr(SemanticStr))) {
SemanticsCall = AI;
// Need a 'self' argument otherwise this is not a semantic call that
// we recognize.
if (getKind() < ArrayCallKind::kArrayInit && !hasSelf())
SemanticsCall = nullptr;
swift::ArraySemanticsCall::ArraySemanticsCall(SILValue V,
StringRef semanticName,
bool matchPartialName)
: SemanticsCall(nullptr) {
if (auto AI = dyn_cast<ApplyInst>(V))
initialize(AI, semanticName, matchPartialName);
}
// A arguments must be passed reference count neutral except for self.
if (SemanticsCall && !isValidSignature())
SemanticsCall = nullptr;
return;
}
// Otherwise, this is not the semantic call we are looking for.
SemanticsCall = nullptr;
/// Match array semantic calls.
swift::ArraySemanticsCall::ArraySemanticsCall(SILInstruction *I,
StringRef semanticName,
bool matchPartialName)
: SemanticsCall(nullptr) {
if (auto AI = dyn_cast<ApplyInst>(I))
initialize(AI, semanticName, matchPartialName);
}
/// Match array semantic calls.
swift::ArraySemanticsCall::ArraySemanticsCall(ApplyInst *AI,
StringRef semanticName,
bool matchPartialName)
: SemanticsCall(nullptr) {
initialize(AI, semanticName, matchPartialName);
}
void ArraySemanticsCall::initialize(ApplyInst *AI, StringRef semanticName,
bool matchPartialName) {
auto *fn = AI->getReferencedFunction();
if (!fn)
return;
if (!(matchPartialName
? fn->hasSemanticsAttrThatStartsWith(semanticName)
: fn->hasSemanticsAttr(semanticName)))
return;
SemanticsCall = AI;
// Need a 'self' argument otherwise this is not a semantic call that
// we recognize.
if (getKind() < ArrayCallKind::kArrayInit && !hasSelf())
SemanticsCall = nullptr;
// A arguments must be passed reference count neutral except for self.
if (SemanticsCall && !isValidSignature())
SemanticsCall = nullptr;
}
/// Determine which kind of array semantics call this is.
@@ -347,7 +372,7 @@ static SILValue copyArrayLoad(SILValue ArrayStructValue,
InsertPt = Inst;
}
return LI->clone(InsertBefore);
return cast<LoadInst>(LI->clone(InsertBefore));
}
static ApplyInst *hoistOrCopyCall(ApplyInst *AI, SILInstruction *InsertBefore,