RegisterPressure: Remove 0 entries from PressureChange

[oota-llvm.git] / lib / CodeGen / PostRASchedulerList.cpp

diff --git a/lib/CodeGen/PostRASchedulerList.cpp b/lib/CodeGen/PostRASchedulerList.cpp
index 6f76116da1ebdaabde4840e886d47516a64da0c6..777f77f0dc7b602bce34153b7b99a1105df46d11 100644 (file)
--- a/lib/CodeGen/PostRASchedulerList.cpp
+++ b/lib/CodeGen/PostRASchedulerList.cpp
@@ -87,7 +87,7 @@ namespace {
 
     void getAnalysisUsage(AnalysisUsage &AU) const override {
       AU.setPreservesCFG();
-      AU.addRequired<AliasAnalysis>();
+      AU.addRequired<AAResultsWrapperPass>();
       AU.addRequired<TargetPassConfig>();
       AU.addRequired<MachineDominatorTree>();
       AU.addPreserved<MachineDominatorTree>();
@@ -267,7 +267,7 @@ bool PostRAScheduler::runOnMachineFunction(MachineFunction &Fn) {
 
   TII = Fn.getSubtarget().getInstrInfo();
   MachineLoopInfo &MLI = getAnalysis<MachineLoopInfo>();
-  AliasAnalysis *AA = &getAnalysis<AliasAnalysis>();
+  AliasAnalysis *AA = &getAnalysis<AAResultsWrapperPass>().getAAResults();
   TargetPassConfig *PassConfig = &getAnalysis<TargetPassConfig>();
 
   RegClassInfo.runOnMachineFunction(Fn);
@@ -302,8 +302,7 @@ bool PostRAScheduler::runOnMachineFunction(MachineFunction &Fn) {
                                  CriticalPathRCs);
 
   // Loop over all of the basic blocks
-  for (MachineFunction::iterator MBB = Fn.begin(), MBBe = Fn.end();
-       MBB != MBBe; ++MBB) {
+  for (auto &MBB : Fn) {
 #ifndef NDEBUG
     // If DebugDiv > 0 then only schedule MBB with (ID % DebugDiv) == DebugMod
     if (DebugDiv > 0) {
@@ -311,25 +310,25 @@ bool PostRAScheduler::runOnMachineFunction(MachineFunction &Fn) {
       if (bbcnt++ % DebugDiv != DebugMod)
         continue;
       dbgs() << "*** DEBUG scheduling " << Fn.getName()
-             << ":BB#" << MBB->getNumber() << " ***\n";
+             << ":BB#" << MBB.getNumber() << " ***\n";
     }
 #endif
 
     // Initialize register live-range state for scheduling in this block.
-    Scheduler.startBlock(MBB);
+    Scheduler.startBlock(&MBB);
 
     // Schedule each sequence of instructions not interrupted by a label
     // or anything else that effectively needs to shut down scheduling.
-    MachineBasicBlock::iterator Current = MBB->end();
-    unsigned Count = MBB->size(), CurrentCount = Count;
-    for (MachineBasicBlock::iterator I = Current; I != MBB->begin(); ) {
+    MachineBasicBlock::iterator Current = MBB.end();
+    unsigned Count = MBB.size(), CurrentCount = Count;
+    for (MachineBasicBlock::iterator I = Current; I != MBB.begin();) {
       MachineInstr *MI = std::prev(I);
       --Count;
       // Calls are not scheduling boundaries before register allocation, but
       // post-ra we don't gain anything by scheduling across calls since we
       // don't need to worry about register pressure.
-      if (MI->isCall() || TII->isSchedulingBoundary(MI, MBB, Fn)) {
-        Scheduler.enterRegion(MBB, I, Current, CurrentCount - Count);
+      if (MI->isCall() || TII->isSchedulingBoundary(MI, &MBB, Fn)) {
+        Scheduler.enterRegion(&MBB, I, Current, CurrentCount - Count);
         Scheduler.setEndIndex(CurrentCount);
         Scheduler.schedule();
         Scheduler.exitRegion();
@@ -343,9 +342,9 @@ bool PostRAScheduler::runOnMachineFunction(MachineFunction &Fn) {
         Count -= MI->getBundleSize();
     }
     assert(Count == 0 && "Instruction count mismatch!");
-    assert((MBB->begin() == Current || CurrentCount != 0) &&
+    assert((MBB.begin() == Current || CurrentCount != 0) &&
            "Instruction count mismatch!");
-    Scheduler.enterRegion(MBB, MBB->begin(), Current, CurrentCount);
+    Scheduler.enterRegion(&MBB, MBB.begin(), Current, CurrentCount);
     Scheduler.setEndIndex(CurrentCount);
     Scheduler.schedule();
     Scheduler.exitRegion();
@@ -355,7 +354,7 @@ bool PostRAScheduler::runOnMachineFunction(MachineFunction &Fn) {
     Scheduler.finishBlock();
 
     // Update register kills
-    Scheduler.fixupKills(MBB);
+    Scheduler.fixupKills(&MBB);
   }
 
   return true;