Remove trailing whitespace to reduce later commit patch noise.

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

diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 8cd82a694bfc9deed3ae24232d538c5ec7036253..985a3fa16342366955d42912ea4109318b998041 100644 (file)
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -824,11 +824,18 @@ bool LiveIntervals::findReachableMBBs(unsigned Start, unsigned End,
 }
 
 LiveInterval* LiveIntervals::createInterval(unsigned reg) {
-  float Weight = TargetRegisterInfo::isPhysicalRegister(reg) ?
-                       HUGE_VALF : 0.0F;
+  float Weight = TargetRegisterInfo::isPhysicalRegister(reg) ? HUGE_VALF : 0.0F;
   return new LiveInterval(reg, Weight);
 }
 
+/// dupInterval - Duplicate a live interval. The caller is responsible for
+/// managing the allocated memory.
+LiveInterval* LiveIntervals::dupInterval(LiveInterval *li) {
+  LiveInterval *NewLI = createInterval(li->reg);
+  NewLI->Copy(*li, getVNInfoAllocator());
+  return NewLI;
+}
+
 /// getVNInfoSourceReg - Helper function that parses the specified VNInfo
 /// copy field and returns the source register that defines it.
 unsigned LiveIntervals::getVNInfoSourceReg(const VNInfo *VNI) const {
@@ -2228,7 +2235,19 @@ void LiveIntervals::spillPhysRegAroundRegDefsUses(const LiveInterval &li,
     unsigned Index = getInstructionIndex(MI);
     if (pli.liveAt(Index)) {
       vrm.addEmergencySpill(SpillReg, MI);
-      pli.removeRange(getLoadIndex(Index), getStoreIndex(Index)+1);
+      unsigned StartIdx = getLoadIndex(Index);
+      unsigned EndIdx = getStoreIndex(Index)+1;
+      if (pli.isInOneLiveRange(StartIdx, EndIdx))
+        pli.removeRange(StartIdx, EndIdx);
+      else {
+        cerr << "Ran out of registers during register allocation!\n";
+        if (MI->getOpcode() == TargetInstrInfo::INLINEASM) {
+          cerr << "Please check your inline asm statement for invalid "
+               << "constraints:\n";
+          MI->print(cerr.stream(), tm_);
+        }
+        exit(1);
+      }
       for (const unsigned* AS = tri_->getSubRegisters(SpillReg); *AS; ++AS) {
         if (!hasInterval(*AS))
           continue;