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Speed up isBytecodeLPath from 20s to .01s in common cases. This makes -native 

not completely painful to use.  Once we decide a directory has a bytecode
library, we know it this function returns true, no need to scan entire directories.

llvm-svn: 23405
This commit is contained in:
Chris Lattner 2005-09-23 06:11:24 +00:00
parent 9b9b510084
commit f20941116b
1 changed files with 11 additions and 17 deletions
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28
llvm/tools/gccld/GenerateCode.cpp
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@ -148,49 +148,43 @@ static bool isBytecodeLibrary(const sys::Path &FullPath) {
} }
static bool isBytecodeLPath(const std::string &LibPath) { static bool isBytecodeLPath(const std::string &LibPath) {
bool isBytecodeLPath = false;
sys::Path LPath(LibPath); sys::Path LPath(LibPath);
// Make sure it exists // Make sure it exists and is a directory
if (!LPath.exists())
return isBytecodeLPath;
// Make sure its a directory
try { try {
if (!LPath.isDirectory()) if (!LPath.exists() || !LPath.isDirectory())
return isBytecodeLPath; return false;
} catch (std::string& xcptn) { } catch (std::string& xcptn) {
return isBytecodeLPath; return false;
} }
// Grab the contents of the -L path // Grab the contents of the -L path
std::set<sys::Path> Files; std::set<sys::Path> Files;
LPath.getDirectoryContents(Files); LPath.getDirectoryContents(Files);
// Iterate over the contents one by one to determine // Iterate over the contents one by one to determine
// if this -L path has any bytecode shared libraries // if this -L path has any bytecode shared libraries
// or archives // or archives
std::set<sys::Path>::iterator File = Files.begin(); std::set<sys::Path>::iterator File = Files.begin();
std::string dllsuffix = sys::Path::GetDLLSuffix();
for (; File != Files.end(); ++File) { for (; File != Files.end(); ++File) {
if ( File->isDirectory() ) if ( File->isDirectory() )
continue; continue;
std::string path = File->toString(); std::string path = File->toString();
std::string dllsuffix = sys::Path::GetDLLSuffix();
// Check for an ending '.dll,.so' or '.a' suffix as all // Check for an ending '.dll,.so' or '.a' suffix as all
// other files are not of interest to us here // other files are not of interest to us here
if ( path.find(dllsuffix, path.size()-dllsuffix.size()) == std::string::npos if (path.find(dllsuffix, path.size()-dllsuffix.size()) == std::string::npos
&& path.find(".a", path.size()-2) == std::string::npos ) && path.find(".a", path.size()-2) == std::string::npos)
continue; continue;
// Finally, check to see if the file is a true bytecode file // Finally, check to see if the file is a true bytecode file
if (isBytecodeLibrary(*File)) if (isBytecodeLibrary(*File))
isBytecodeLPath = true; return true;
} }
return isBytecodeLPath; return false;
} }
/// GenerateBytecode - generates a bytecode file from the specified module. /// GenerateBytecode - generates a bytecode file from the specified module.