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

[Chris Lattner]

Changes in directory llvm/lib/CodeGen:

LiveInterval.cpp updated: 1.29 -> 1.30
---
Log message:

When replacing value numbers, make sure to compactify the value # space.


---
Diffs of the changes:  (+12 -0)

 LiveInterval.cpp |   12 ++++++++++++
 1 files changed, 12 insertions(+)


Index: llvm/lib/CodeGen/LiveInterval.cpp
diff -u llvm/lib/CodeGen/LiveInterval.cpp:1.29 llvm/lib/CodeGen/LiveInterval.cpp:1.30
--- llvm/lib/CodeGen/LiveInterval.cpp:1.29	Thu Aug 24 17:43:55 2006
+++ llvm/lib/CodeGen/LiveInterval.cpp	Thu Aug 24 18:22:59 2006
@@ -470,6 +470,18 @@
       }
     }
   }
+  
+  // Now that V1 is dead, remove it.  If it is the largest value number, just
+  // nuke it (and any other deleted values neighboring it), otherwise mark it as
+  // ~1U so it can be nuked later.
+  if (V1 == NumValues-1) {
+    do {
+      InstDefiningValue.pop_back();
+      --NumValues;
+    } while (InstDefiningValue.back() == ~1U);
+  } else {
+    InstDefiningValue[V1] = ~1U;
+  }
 }