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Remove a unsafe optimization. This fixes 401.bzip2.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44587 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-12-04 23:57:55 +00:00
parent 5d28b888b9
commit dd86ce3d57
1 changed files with 0 additions and 8 deletions
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8
lib/CodeGen/VirtRegMap.cpp
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@ -1040,14 +1040,6 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM) {
// 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