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Add hidden flags to allow binary search of post-RA scheduling errors.

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llvm-svn: 80702
This commit is contained in:
David Goodwin 2009-09-01 18:34:03 +00:00
parent 70557af33a
commit 1b286bc320
1 changed files with 21 additions and 0 deletions
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21
lib/CodeGen/PostRASchedulerList.cpp
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@ -56,6 +56,16 @@ EnablePostRAHazardAvoidance("avoid-hazards",
cl::desc("Enable exact hazard avoidance"),
cl::init(false), cl::Hidden);
// If DebugDiv > 0 then only schedule MBB with (ID % DebugDiv) == DebugMod
static cl::opt<int>
DebugDiv("postra-sched-debugdiv",
cl::desc("Debug control MBBs that are scheduled"),
cl::init(0), cl::Hidden);
static cl::opt<int>
DebugMod("postra-sched-debugmod",
cl::desc("Debug control MBBs that are scheduled"),
cl::init(0), cl::Hidden);
namespace {
class VISIBILITY_HIDDEN PostRAScheduler : public MachineFunctionPass {
public:
@ -212,6 +222,17 @@ bool PostRAScheduler::runOnMachineFunction(MachineFunction &Fn) {
// Loop over all of the basic blocks
for (MachineFunction::iterator MBB = Fn.begin(), MBBe = Fn.end();
MBB != MBBe; ++MBB) {
#ifndef NDEBUG
// If DebugDiv > 0 then only schedule MBB with (ID % DebugDiv) == DebugMod
if (DebugDiv > 0) {
static int bbcnt = 0;
if (bbcnt++ % DebugDiv != DebugMod)
continue;
errs() << "*** DEBUG scheduling " << Fn.getFunction()->getNameStr() <<
":MBB ID#" << MBB->getNumber() << " ***\n";
}
#endif
// Initialize register live-range state for scheduling in this block.
Scheduler.GenerateLivenessForKills = false;
Scheduler.StartBlock(MBB);