[llvm-commits] CVS: llvm/lib/CodeGen/LiveIntervalAnalysis.cpp

[Chris Lattner]

Changes in directory llvm/lib/CodeGen:

LiveIntervalAnalysis.cpp updated: 1.131 -> 1.132
---
Log message:

Reduce usage of MRegisterInfo::getRegClass


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Diffs of the changes:  (+6 -5)

Index: llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
diff -u llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.131 llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.132
--- llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.131	Mon Oct 25 13:40:47 2004
+++ llvm/lib/CodeGen/LiveIntervalAnalysis.cpp	Tue Oct 26 00:29:18 2004
@@ -658,15 +658,16 @@
 /// classes.  The registers may be either phys or virt regs.
 bool LiveIntervals::differingRegisterClasses(unsigned RegA,
                                              unsigned RegB) const {
-  const TargetRegisterClass *RegClass;
 
   // Get the register classes for the first reg.
-  if (MRegisterInfo::isVirtualRegister(RegA))
-    RegClass = mf_->getSSARegMap()->getRegClass(RegA);
-  else
-    RegClass = mri_->getRegClass(RegA);
+  if (MRegisterInfo::isPhysicalRegister(RegA)) {
+    assert(MRegisterInfo::isVirtualRegister(RegB) && 
+           "Shouldn't consider two physregs!");
+    return !mf_->getSSARegMap()->getRegClass(RegB)->contains(RegA);
+  }
 
   // Compare against the regclass for the second reg.
+  const TargetRegisterClass *RegClass = mf_->getSSARegMap()->getRegClass(RegA);
   if (MRegisterInfo::isVirtualRegister(RegB))
     return RegClass != mf_->getSSARegMap()->getRegClass(RegB);
   else