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Convert llvm-extract to use lazy loading. This makes it substantially

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faster on large modules.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112110 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-08-25 23:33:07 +00:00
parent 1a68958d3d
commit 44f95335dd
1 changed files with 14 additions and 1 deletions
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15
tools/llvm-extract/llvm-extract.cpp
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@ -71,9 +71,10 @@ int main(int argc, char **argv) {
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, "llvm extractor\n");
// Use lazy loading, since we only care about selected global values.
SMDiagnostic Err;
std::auto_ptr<Module> M;
M.reset(ParseIRFile(InputFilename, Err, Context));
M.reset(getLazyIRFileModule(InputFilename, Err, Context));
if (M.get() == 0) {
Err.Print(argv[0], errs());
@ -104,6 +105,18 @@ int main(int argc, char **argv) {
GVs.push_back(GV);
}
// Materialize requisite global values.
for (size_t i = 0, e = GVs.size(); i != e; ++i) {
GlobalValue *GV = GVs[i];
if (GV->isMaterializable()) {
std::string ErrInfo;
if (GV->Materialize(&ErrInfo)) {
errs() << argv[0] << ": error reading input: " << ErrInfo << "\n";
return 1;
}
}
}
// In addition to deleting all other functions, we also want to spiff it
// up a little bit. Do this now.
PassManager Passes;