[llvm] r258364 - MachineScheduler: Add a command line option to disable post scheduler.

[Chad Rosier via llvm-commits]

Author: mcrosier
Date: Wed Jan 20 17:08:32 2016
New Revision: 258364

URL: http://llvm.org/viewvc/llvm-project?rev=258364&view=rev
Log:
MachineScheduler: Add a command line option to disable post scheduler.

Modified:
    llvm/trunk/lib/CodeGen/MachineScheduler.cpp

Modified: llvm/trunk/lib/CodeGen/MachineScheduler.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineScheduler.cpp?rev=258364&r1=258363&r2=258364&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/MachineScheduler.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineScheduler.cpp Wed Jan 20 17:08:32 2016
@@ -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::runOnMachineF
   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;
   }