6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-17 20:29:31 +00:00
Code Issues Projects Releases Wiki Activity

Don't consider instructions with implicit physical register

Browse Source 
defs to be necessarily live.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56310 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-09-18 18:22:32 +00:00
parent 6a0fd93547
commit e251b1529f
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
lib/CodeGen/DeadMachineInstructionElim.cpp
View File

@ -64,7 +64,8 @@ bool DeadMachineInstructionElim::runOnMachineFunction(MachineFunction &MF) {
const MachineOperand &MO = MI->getOperand(i);
if (MO.isRegister() && MO.isDef()) {
unsigned Reg = MO.getReg();
if (TargetRegisterInfo::isPhysicalRegister(Reg) ||
if ((!MO.isImplicit() &&
TargetRegisterInfo::isPhysicalRegister(Reg)) ||
!MRI.use_empty(Reg)) {
// This def has a use. Don't delete the instruction!
AllDefsDead = false;