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add a pass that can extract all kinds of global values, not just functions. Update llvm-extract to use it and optionally extract a global variable if you want it too

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48015 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Lenharth
2008-03-07 19:51:57 +00:00
parent bbf1c514bd
commit d245a8ae47
3 changed files with 206 additions and 7 deletions
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30
tools/llvm-extract/llvm-extract.cpp
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@ -39,17 +39,22 @@ static cl::opt<bool>
Force("f", cl::desc("Overwrite output files"));
static cl::opt<bool>
DeleteFn("delete", cl::desc("Delete specified function from Module"));
DeleteFn("delete", cl::desc("Delete specified Globals from Module"));
static cl::opt<bool>
Relink("relink",
cl::desc("Turn external linkage for callees of function to delete"));
// ExtractFunc - The function to extract from the module... defaults to main.
// ExtractFunc - The function to extract from the module...
static cl::opt<std::string>
ExtractFunc("func", cl::desc("Specify function to extract"), cl::init("main"),
ExtractFunc("func", cl::desc("Specify function to extract"), cl::init(""),
cl::value_desc("function"));
// ExtractGlobal - The global to extract from the module...
static cl::opt<std::string>
ExtractGlobal("glob", cl::desc("Specify global to extract"), cl::init(""),
cl::value_desc("global"));
int main(int argc, char **argv) {
llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, "llvm extractor\n");
@ -72,10 +77,17 @@ int main(int argc, char **argv) {
}
// Figure out which function we should extract
Function *F = M.get()->getFunction(ExtractFunc);
if (F == 0) {
GlobalVariable *G = ExtractGlobal.size() ?
M.get()->getNamedGlobal(ExtractGlobal) : 0;
// Figure out which function we should extract
Function *F = ExtractFunc.size() ?
M.get()->getFunction(ExtractFunc) :
M.get()->getFunction("main");
if (F == 0 && G == 0) {
cerr << argv[0] << ": program doesn't contain function named '"
<< ExtractFunc << "'!\n";
<< ExtractFunc << "' or a global named '" << ExtractGlobal << "'!\n";
return 1;
}
@ -84,7 +96,11 @@ int main(int argc, char **argv) {
PassManager Passes;
Passes.add(new TargetData(M.get())); // Use correct TargetData
// Either isolate the function or delete it from the Module
Passes.add(createFunctionExtractionPass(F, DeleteFn, Relink));
std::vector<GlobalValue*> GVs;
if (F) GVs.push_back(F);
if (G) GVs.push_back(G);
Passes.add(createGVExtractionPass(GVs, DeleteFn, Relink));
if (!DeleteFn)
Passes.add(createGlobalDCEPass()); // Delete unreachable globals
Passes.add(createDeadTypeEliminationPass()); // Remove dead types...