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Re-added the part where it tries to remove all global variables first.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31225 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2006-10-27 20:18:06 +00:00
parent 2ac33c447d
commit b3d83a3ed5
1 changed files with 37 additions and 12 deletions
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49
tools/bugpoint/CrashDebugger.cpp
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@ -357,22 +357,47 @@ static bool DebugACrash(BugDriver &BD, bool (*TestFn)(BugDriver &, Module *)) {
if (BD.getProgram()->global_begin() != BD.getProgram()->global_end()) {
// Now try to reduce the number of global variable initializers in the
// module to something small.
std::vector<GlobalVariable*> GVs;
Module *M = CloneModule(BD.getProgram());
bool DeletedInit = false;
for (Module::global_iterator I = BD.getProgram()->global_begin(),
E = BD.getProgram()->global_end(); I != E; ++I)
if (I->hasInitializer())
GVs.push_back(I);
for (Module::global_iterator I = M->global_begin(), E = M->global_end();
I != E; ++I)
if (I->hasInitializer()) {
I->setInitializer(0);
I->setLinkage(GlobalValue::ExternalLinkage);
DeletedInit = true;
}
if (GVs.size() > 1 && !BugpointIsInterrupted) {
std::cout << "\n*** Attempting to reduce the number of global variables "
<< "in the testcase\n";
if (!DeletedInit) {
delete M; // No change made...
} else {
// See if the program still causes a crash...
std::cout << "\nChecking to see if we can delete global inits: ";
unsigned OldSize = GVs.size();
ReduceCrashingGlobalVariables(BD, TestFn).reduceList(GVs);
if (TestFn(BD, M)) { // Still crashes?
BD.setNewProgram(M);
std::cout << "\n*** Able to remove all global initializers!\n";
} else { // No longer crashes?
std::cout << " - Removing all global inits hides problem!\n";
delete M;
if (GVs.size() < OldSize)
BD.EmitProgressBytecode("reduced-global-variables");
std::vector<GlobalVariable*> GVs;
for (Module::global_iterator I = BD.getProgram()->global_begin(),
E = BD.getProgram()->global_end(); I != E; ++I)
if (I->hasInitializer())
GVs.push_back(I);
if (GVs.size() > 1 && !BugpointIsInterrupted) {
std::cout << "\n*** Attempting to reduce the number of global "
<< "variables in the testcase\n";
unsigned OldSize = GVs.size();
ReduceCrashingGlobalVariables(BD, TestFn).reduceList(GVs);
if (GVs.size() < OldSize)
BD.EmitProgressBytecode("reduced-global-variables");
}
}
}