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Add -disable-global-remove option to bugpoint. 

Sometimes when bugpointing a crash the bugpoint-reduced-simplified.bc reproduces
a totally different bug than the original one ("GV doesn't have initializer").
Although its useful to report that bug too, I need a way to reduce the original
bug, hence I introduced -disable-global-remove.

llvm-svn: 72361
This commit is contained in:
Torok Edwin 2009-05-24 09:31:04 +00:00
parent cd2e0cd297
commit 5bd3f7b4a2
1 changed files with 6 additions and 1 deletions
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7
llvm/tools/bugpoint/CrashDebugger.cpp
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@ -37,6 +37,10 @@ namespace {
KeepMain("keep-main",
cl::desc("Force function reduction to keep main"),
cl::init(false));
cl::opt<bool>
NoGlobalRM ("disable-global-remove",
cl::desc("Do not remove global variables"),
cl::init(false));
}
namespace llvm {
@ -344,7 +348,8 @@ bool ReduceCrashingBlocks::TestBlocks(std::vector<const BasicBlock*> &BBs) {
static bool DebugACrash(BugDriver &BD, bool (*TestFn)(BugDriver &, Module *)) {
// See if we can get away with nuking some of the global variable initializers
// in the program...
if (BD.getProgram()->global_begin() != BD.getProgram()->global_end()) {
if (!NoGlobalRM &&
BD.getProgram()->global_begin() != BD.getProgram()->global_end()) {
// Now try to reduce the number of global variable initializers in the
// module to something small.
Module *M = CloneModule(BD.getProgram());