[llvm-commits] [llvm] r44587 - /llvm/trunk/lib/CodeGen/VirtRegMap.cpp

[Evan Cheng]

Author: evancheng
Date: Tue Dec  4 17:57:55 2007
New Revision: 44587

URL: http://llvm.org/viewvc/llvm-project?rev=44587&view=rev
Log:
Remove a unsafe optimization. This fixes 401.bzip2.

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

Modified: llvm/trunk/lib/CodeGen/VirtRegMap.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/VirtRegMap.cpp?rev=44587&r1=44586&r2=44587&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/VirtRegMap.cpp (original)
+++ llvm/trunk/lib/CodeGen/VirtRegMap.cpp Tue Dec  4 17:57:55 2007
@@ -1040,14 +1040,6 @@
 
       // Check to see if this stack slot is available.
       unsigned PhysReg = Spills.getSpillSlotOrReMatPhysReg(SSorRMId);
-      if (!PhysReg && DoReMat) {
-        // This use is rematerializable. But perhaps the value is available in
-        // a register if the definition is not deleted. If so, check if we can
-        // reuse the value.
-        ReuseSlot = VRM.getStackSlot(VirtReg);
-        if (ReuseSlot != VirtRegMap::NO_STACK_SLOT)
-          PhysReg = Spills.getSpillSlotOrReMatPhysReg(ReuseSlot);
-      }
 
       // If this is a sub-register use, make sure the reuse register is in the
       // right register class. For example, for x86 not all of the 32-bit