[llvm-commits] [llvm] r57765 - /llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp

[Evan Cheng]

Author: evancheng
Date: Sat Oct 18 00:18:55 2008
New Revision: 57765

URL: http://llvm.org/viewvc/llvm-project?rev=57765&view=rev
Log:
When creating intervals, leave min(1, numdefs) holes after each instruction.

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

Modified: llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp?rev=57765&r1=57764&r2=57765&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp Sat Oct 18 00:18:55 2008
@@ -130,9 +130,13 @@
       MIIndex += InstrSlots::NUM;
       FunctionSize++;
       
-      // Insert an empty slot after every instruction.
-      MIIndex += InstrSlots::NUM;
-      i2miMap_.push_back(0);
+      // Insert min(1, numdefs) empty slots after every instruction.
+      unsigned Slots = I->getDesc().getNumDefs();
+      if (Slots == 0)
+        Slots = 1;
+      MIIndex += InstrSlots::NUM * Slots;
+      while (Slots--)
+        i2miMap_.push_back(0);
     }
     
     // Set the MBB2IdxMap entry for this MBB.
@@ -732,8 +736,12 @@
           handleRegisterDef(MBB, MI, MIIndex, MO, i);
         }
       }
-      
-      MIIndex += InstrSlots::NUM;
+
+      // Skip over the empty slots after each instruction.
+      unsigned Slots = MI->getDesc().getNumDefs();
+      if (Slots == 0)
+        Slots = 1;
+      MIIndex += InstrSlots::NUM * Slots;
       
       // Skip over empty indices.
       while (MIIndex / InstrSlots::NUM < i2miMap_.size() &&