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MachineScheduler: Add a command line option to disable post scheduler. 

llvm-svn: 258364
This commit is contained in:
Chad Rosier 2016-01-20 23:08:32 +00:00
parent 6338d7c390
commit 816a1ab9d9
1 changed files with 9 additions and 1 deletions
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10
llvm/lib/CodeGen/MachineScheduler.cpp
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@ -219,6 +219,11 @@ static cl::opt<bool> EnableMachineSched(
cl::desc("Enable the machine instruction scheduling pass."), cl::init(true),
cl::Hidden);
static cl::opt<bool> EnablePostRAMachineSched(
"enable-post-misched",
cl::desc("Enable the post-ra machine instruction scheduling pass."),
cl::init(true), cl::Hidden);
/// Forward declare the standard machine scheduler. This will be used as the
/// default scheduler if the target does not set a default.
static ScheduleDAGInstrs *createGenericSchedLive(MachineSchedContext *C);
@ -355,7 +360,10 @@ bool PostMachineScheduler::runOnMachineFunction(MachineFunction &mf) {
if (skipOptnoneFunction(*mf.getFunction()))
return false;
if (!mf.getSubtarget().enablePostRAScheduler()) {
if (EnablePostRAMachineSched.getNumOccurrences()) {
if (!EnablePostRAMachineSched)
return false;
} else if (!mf.getSubtarget().enablePostRAScheduler()) {
DEBUG(dbgs() << "Subtarget disables post-MI-sched.\n");
return false;
}