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[globalisel] Make the MatchAction hierarchy consistent with the matchers. NFC.

Browse Source 
Reviewers: aditya_nandakumar, rovka, t.p.northover, qcolombet, ab

Subscribers: dberris, llvm-commits, kristof.beyls

Differential Revision: https://reviews.llvm.org/D29321

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@293760 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Sanders 2017-02-01 10:53:10 +00:00
parent 7b41d2df25
commit 40a8ce7678
1 changed files with 27 additions and 17 deletions
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44
utils/TableGen/GlobalISelEmitter.cpp
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@ -110,16 +110,6 @@ static bool isTrivialOperatorNode(const TreePatternNode *N) {
//===- Matchers -----------------------------------------------------------===//
struct MatchAction {
virtual ~MatchAction() {}
virtual void emit(raw_ostream &OS) const = 0;
};
raw_ostream &operator<<(raw_ostream &S, const MatchAction &A) {
A.emit(S);
return S;
}
template <class PredicateTy> class PredicateListMatcher {
private:
typedef std::vector<std::unique_ptr<PredicateTy>> PredicateVec;
@ -293,11 +283,22 @@ public:
}
};
struct MutateOpcode : public MatchAction {
MutateOpcode(const CodeGenInstruction *I) : I(I) {}
//===- Actions ------------------------------------------------------------===//
class MatchAction {
public:
virtual ~MatchAction() {}
virtual void emitCxxActionStmts(raw_ostream &OS) const = 0;
};
class MutateOpcodeAction : public MatchAction {
private:
const CodeGenInstruction *I;
virtual void emit(raw_ostream &OS) const {
public:
MutateOpcodeAction(const CodeGenInstruction *I) : I(I) {}
virtual void emitCxxActionStmts(raw_ostream &OS) const {
OS << "I.setDesc(TII.get(" << I->Namespace << "::" << I->TheDef->getName()
<< "));";
}
@ -312,9 +313,9 @@ class RuleMatcher {
const PatternToMatch &P;
std::vector<std::unique_ptr<InstructionMatcher>> Matchers;
std::vector<std::unique_ptr<MatchAction>> Actions;
public:
std::vector<std::unique_ptr<MatchAction>> Actions;
RuleMatcher(const PatternToMatch &P) : P(P) {}
@ -323,6 +324,12 @@ public:
return *Matchers.back();
}
template <class Kind, class... Args>
Kind &addAction(Args&&... args) {
Actions.emplace_back(llvm::make_unique<Kind>(std::forward<Args>(args)...));
return *static_cast<Kind *>(Actions.back().get());
}
void emit(raw_ostream &OS) {
if (Matchers.empty())
llvm_unreachable("Unexpected empty matcher!");
@ -344,8 +351,11 @@ public:
Matchers.front()->emitCxxPredicateExpr(OS, "I");
OS << ") {\n";
for (auto &MA : Actions)
OS << " " << *MA << "\n";
for (const auto &MA : Actions) {
OS << " ";
MA->emitCxxActionStmts(OS);
OS << "\n";
}
OS << " constrainSelectedInstRegOperands(I, TII, TRI, RBI);\n";
OS << " return true;\n";
@ -410,7 +420,7 @@ GlobalISelEmitter::runOnPattern(const PatternToMatch &P, raw_ostream &OS) {
// The operators look good: match the opcode and mutate it to the new one.
InstructionMatcher &InsnMatcher = M.addInstructionMatcher();
InsnMatcher.addPredicate<InstructionOpcodeMatcher>(&SrcGI);
M.Actions.emplace_back(new MutateOpcode(&DstI));
M.addAction<MutateOpcodeAction>(&DstI);
// Next, analyze the children, only accepting patterns that don't require
// any change to operands.