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

[Evan Cheng]

Changes in directory llvm/lib/CodeGen:

LiveIntervalAnalysis.cpp updated: 1.249 -> 1.250
---
Log message:

If a livein is not used in the block. It's live through.

---
Diffs of the changes:  (+8 -5)

 LiveIntervalAnalysis.cpp |   13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)


Index: llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
diff -u llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.249 
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.250
--- llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.249     Tue Jun 26 20:16:36 2007
+++ llvm/lib/CodeGen/LiveIntervalAnalysis.cpp   Wed Jun 27 13:47:28 2007
@@ -625,13 +625,15 @@
 exit:
   // Live-in register might not be used at all.
   if (end == MIIdx) {
-    DOUT << " dead";
-    if (isAlias)
+    if (isAlias) {
+      DOUT << " dead";
       end = getDefIndex(MIIdx) + 1;
+    } else {
+      DOUT << " live through";
+      end = baseIndex;
+    }
   }
 
-  assert(start < end && "did not find end of interval?");
-
   LiveRange LR(start, end, interval.getNextValue(~0U, 0));
   DOUT << " +" << LR << '\n';
   interval.addRange(LR);
@@ -662,7 +664,8 @@
         // Multiple live-ins can alias the same register.
         for (const unsigned* AS = mri_->getSubRegisters(*LI); *AS; ++AS)
           if (!hasInterval(*AS))
-            handleLiveInRegister(MBB, MIIndex, getOrCreateInterval(*AS), true);
+            handleLiveInRegister(MBB, MIIndex, getOrCreateInterval(*AS),
+                                 true);
       }
     }
     



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