[llvm-commits] [llvm] r83653 - /llvm/trunk/lib/CodeGen/PrologEpilogInserter.cpp

[Jim Grosbach]

Author: grosbach
Date: Fri Oct  9 12:33:33 2009
New Revision: 83653

URL: http://llvm.org/viewvc/llvm-project?rev=83653&view=rev
Log:
when previous scratch register is killed, flag the value as no longer tracking

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

Modified: llvm/trunk/lib/CodeGen/PrologEpilogInserter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/PrologEpilogInserter.cpp?rev=83653&r1=83652&r2=83653&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/PrologEpilogInserter.cpp (original)
+++ llvm/trunk/lib/CodeGen/PrologEpilogInserter.cpp Fri Oct  9 12:33:33 2009
@@ -797,10 +797,13 @@
             if (Reg == PrevScratchReg) {
               if (MO.isUse()) {
                 // Two-address operands implicitly kill
-                if (MO.isKill() || MI->isRegTiedToDefOperand(i))
+                if (MO.isKill() || MI->isRegTiedToDefOperand(i)) {
+                  havePrevValue = false;
                   PrevScratchReg = 0;
+                }
               } else {
                 assert (MO.isDef());
+                havePrevValue = false;
                 PrevScratchReg = 0;
               }
             }