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Only emit the AvailableFeatures variable if it's used.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129124 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-04-08 04:08:57 +00:00
parent 3dcac711c0
commit dd099e1e55
1 changed files with 7 additions and 4 deletions
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11
utils/TableGen/AsmWriterEmitter.cpp
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@ -625,10 +625,10 @@ public:
unsigned getOpIndex(StringRef Op) { return OpMap[Op]; } unsigned getOpIndex(StringRef Op) { return OpMap[Op]; }
bool isOpMapped(StringRef Op) { return OpMap.find(Op) != OpMap.end(); } bool isOpMapped(StringRef Op) { return OpMap.find(Op) != OpMap.end(); }
void print(raw_ostream &O) { bool print(raw_ostream &O) {
if (Conds.empty() && ReqFeatures.empty()) { if (Conds.empty() && ReqFeatures.empty()) {
O.indent(6) << "return true;\n"; O.indent(6) << "return true;\n";
return; return false;
} }
O << "if ("; O << "if (";
@ -675,6 +675,7 @@ public:
O.indent(6) << "break;\n"; O.indent(6) << "break;\n";
O.indent(4) << '}'; O.indent(4) << '}';
return !ReqFeatures.empty();
} }
bool operator==(const IAPrinter &RHS) { bool operator==(const IAPrinter &RHS) {
@ -937,6 +938,7 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
std::string Cases; std::string Cases;
raw_string_ostream CasesO(Cases); raw_string_ostream CasesO(Cases);
bool NeedAvailableFeatures = false;
for (std::map<std::string, std::vector<IAPrinter*> >::iterator for (std::map<std::string, std::vector<IAPrinter*> >::iterator
I = IAPrinterMap.begin(), E = IAPrinterMap.end(); I != E; ++I) { I = IAPrinterMap.begin(), E = IAPrinterMap.end(); I != E; ++I) {
@ -967,7 +969,7 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
II = UniqueIAPs.begin(), IE = UniqueIAPs.end(); II != IE; ++II) { II = UniqueIAPs.begin(), IE = UniqueIAPs.end(); II != IE; ++II) {
IAPrinter *IAP = *II; IAPrinter *IAP = *II;
CasesO.indent(4); CasesO.indent(4);
IAP->print(CasesO); NeedAvailableFeatures |= IAP->print(CasesO);
CasesO << '\n'; CasesO << '\n';
} }
@ -983,7 +985,8 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
O.indent(2) << "StringRef AsmString;\n"; O.indent(2) << "StringRef AsmString;\n";
O.indent(2) << "std::map<StringRef, unsigned> OpMap;\n"; O.indent(2) << "std::map<StringRef, unsigned> OpMap;\n";
O.indent(2) << "unsigned AvailableFeatures = getAvailableFeatures();\n\n"; if (NeedAvailableFeatures)
O.indent(2) << "unsigned AvailableFeatures = getAvailableFeatures();\n\n";
O.indent(2) << "switch (MI->getOpcode()) {\n"; O.indent(2) << "switch (MI->getOpcode()) {\n";
O.indent(2) << "default: return true;\n"; O.indent(2) << "default: return true;\n";
O << CasesO.str(); O << CasesO.str();