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

[Evan Cheng]

Changes in directory llvm/lib/CodeGen:

RegisterScavenging.cpp updated: 1.9 -> 1.10
---
Log message:

Mark dead def as unused.

---
Diffs of the changes:  (+6 -2)

 RegisterScavenging.cpp |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)


Index: llvm/lib/CodeGen/RegisterScavenging.cpp
diff -u llvm/lib/CodeGen/RegisterScavenging.cpp:1.9 llvm/lib/CodeGen/RegisterScavenging.cpp:1.10
--- llvm/lib/CodeGen/RegisterScavenging.cpp:1.9	Thu Mar  1 02:56:24 2007
+++ llvm/lib/CodeGen/RegisterScavenging.cpp	Fri Mar  2 04:43:16 2007
@@ -100,14 +100,18 @@
     if (!MO.isReg() || !MO.isDef())
       continue;
     unsigned Reg = MO.getReg();
+    // If it's dead upon def, then it is now free.
+    if (MO.isDead()) {
+      setUnused(Reg);
+      continue;
+    }
     // Skip two-address destination operand.
     if (TID->findTiedToSrcOperand(i) != -1) {
       assert(isUsed(Reg));
       continue;
     }
     assert(isUnused(Reg) || isReserved(Reg));
-    if (!MO.isDead())
-      setUsed(Reg);
+    setUsed(Reg);
   }
 }