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

We don't need to update live intervals for dead PHIs.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54369 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-08-05 20:51:26 +00:00
parent d3eda89f4c
commit e7b8205e6e
1 changed files with 34 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
lib/CodeGen/StrongPHIElimination.cpp
View File

@ -884,6 +884,8 @@ bool StrongPHIElimination::runOnMachineFunction(MachineFunction &Fn) {
I != E; ) {
MachineInstr* PInstr = *(I++);
// Don't do live interval updating for dead PHIs.
if (!PInstr->registerDefIsDead(PInstr->getOperand(0).getReg())) {
// Trim live intervals of input registers. They are no longer live into
// this block.
for (unsigned i = 1; i < PInstr->getNumOperands(); i += 2) {
@ -917,6 +919,7 @@ bool StrongPHIElimination::runOnMachineFunction(MachineFunction &Fn) {
PLR->start, PLR->valno);
PI.addRange(R);
}
}
LI.RemoveMachineInstrFromMaps(PInstr);
PInstr->eraseFromParent();