maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Use a more efficient data structure for the "operand map". The number of 

operands to an instruction aren't great, so an iterative search is fairly quick
and doesn't have the overhead of std::map.

llvm-svn: 131886
This commit is contained in:
Bill Wendling 2011-05-23 00:18:33 +00:00
parent 321c58fc41
commit f5199debc0
1 changed files with 28 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
llvm/utils/TableGen/AsmWriterEmitter.cpp
View File

@ -670,8 +670,8 @@ public:
for (std::map<StringRef, unsigned>::iterator
I = OpMap.begin(), E = OpMap.end(); I != E; ++I)
O.indent(6) << "OpMap[\"" << I->first << "\"] = "
<< I->second << ";\n";
O.indent(6) << "OpMap.push_back(std::make_pair(\"" << I->first << "\", "
<< I->second << "));\n";
O.indent(6) << "break;\n";
O.indent(4) << '}';
@ -754,6 +754,20 @@ static void EmitComputeAvailableFeatures(AsmWriterInfo &Info,
O << "}\n\n";
}
static void EmitGetMapOperandNumber(raw_ostream &O) {
O << "static unsigned getMapOperandNumber("
<< "const SmallVectorImpl<std::pair<StringRef, unsigned> > &OpMap,\n";
O << " StringRef Name) {\n";
O << " for (SmallVectorImpl<std::pair<StringRef, unsigned> >::"
<< "const_iterator\n";
O << " I = OpMap.begin(), E = OpMap.end(); I != E; ++I)\n";
O << " if (I->first == Name)\n";
O << " return I->second;\n";
O << " assert(false && \"Operand not in map!\");\n";
O << " return 0;\n";
O << "}\n\n";
}
void AsmWriterEmitter::EmitRegIsInRegClass(raw_ostream &O) {
CodeGenTarget Target(Records);
@ -934,9 +948,12 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
EmitSubtargetFeatureFlagEnumeration(AWI, O);
EmitComputeAvailableFeatures(AWI, AsmWriter, Target, O);
O << "bool " << Target.getName() << ClassName
<< "::printAliasInstr(const " << MachineInstrClassName
<< " *MI, raw_ostream &OS) {\n";
std::string Header;
raw_string_ostream HeaderO(Header);
HeaderO << "bool " << Target.getName() << ClassName
<< "::printAliasInstr(const " << MachineInstrClassName
<< " *MI, raw_ostream &OS) {\n";
std::string Cases;
raw_string_ostream CasesO(Cases);
@ -979,14 +996,18 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
}
if (CasesO.str().empty() || !isMC) {
O << HeaderO.str();
O << " return false;\n";
O << "}\n\n";
O << "#endif // PRINT_ALIAS_INSTR\n";
return;
}
EmitGetMapOperandNumber(O);
O << HeaderO.str();
O.indent(2) << "StringRef AsmString;\n";
O.indent(2) << "std::map<StringRef, unsigned> OpMap;\n";
O.indent(2) << "SmallVector<std::pair<StringRef, unsigned>, 4> OpMap;\n";
if (NeedAvailableFeatures)
O.indent(2) << "unsigned AvailableFeatures = getAvailableFeatures();\n\n";
O.indent(2) << "switch (MI->getOpcode()) {\n";
@ -1012,7 +1033,7 @@ void AsmWriterEmitter::EmitPrintAliasInstruction(raw_ostream &O) {
O << " *I == '_'))\n";
O << " ++I;\n";
O << " StringRef Name(Start, I - Start);\n";
O << " printOperand(MI, OpMap[Name], OS);\n";
O << " printOperand(MI, getMapOperandNumber(OpMap, Name), OS);\n";
O << " } else {\n";
O << " OS << *I++;\n";
O << " }\n";