6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-03-10 02:38:50 +00:00
Code Issues Projects Releases Wiki Activity

slightly improve the runtime and code size of the Intrinsics info table by not

Browse Source 
comparing the "llvm." prefix in the memcmp, and not storing it in the string literal.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113136 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-09-06 01:44:44 +00:00
parent c5a5cf26fd
commit 2738ff9c22
1 changed files with 15 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
utils/TableGen/IntrinsicEmitter.cpp
View File

@ -99,33 +99,35 @@ EmitFnNameRecognizer(const std::vector<CodeGenIntrinsic> &Ints,
// Build a function name -> intrinsic name mapping.
std::map<std::string, unsigned> IntMapping;
for (unsigned i = 0, e = Ints.size(); i != e; ++i)
IntMapping[Ints[i].Name] = i;
IntMapping[Ints[i].Name.substr(5)] = i;
OS << "// Function name -> enum value recognizer code.\n";
OS << "#ifdef GET_FUNCTION_RECOGNIZER\n";
OS << " switch (Name[5]) {\n";
OS << " Name += 5; Len -= 5; // Skip over 'llvm.'\n";
OS << " switch (*Name) { // Dispatch on first letter.\n";
OS << " default:\n";
// Emit the intrinsics in sorted order.
char LastChar = 0;
for (std::map<std::string, unsigned>::iterator I = IntMapping.begin(),
E = IntMapping.end(); I != E; ++I) {
if (I->first[5] != LastChar) {
LastChar = I->first[5];
if (I->first[0] != LastChar) {
LastChar = I->first[0];
OS << " break;\n";
OS << " case '" << LastChar << "':\n";
}
// For overloaded intrinsics, only the prefix needs to match
if (Ints[I->second].isOverloaded)
OS << " if (Len > " << I->first.size()
<< " && !memcmp(Name, \"" << I->first << ".\", "
<< (I->first.size() + 1) << ")) return " << TargetPrefix << "Intrinsic::"
std::string TheStr = I->first;
if (Ints[I->second].isOverloaded) {
TheStr += '.'; // Require "bswap." instead of bswap.
OS << " if (Len > " << I->first.size();
} else {
OS << " if (Len == " << I->first.size();
}
OS << " && !memcmp(Name, \"" << TheStr << "\", "
<< TheStr.size() << ")) return " << TargetPrefix << "Intrinsic::"
<< Ints[I->second].EnumName << ";\n";
else
OS << " if (Len == " << I->first.size()
<< " && !memcmp(Name, \"" << I->first << "\", "
<< I->first.size() << ")) return " << TargetPrefix << "Intrinsic::"
<< Ints[I->second].EnumName << ";\n";
}
OS << " }\n";
OS << "#endif\n\n";