6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-24 23:28:41 +00:00
Code Issues Projects Releases Wiki Activity

Commit some changes I had managed to lose last night while refactoring the code. Avoid change use of PHI instructions because it's not legal to insert any instructions before them.

Browse Source 
This fixes PR6027.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93335 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2010-01-13 19:16:39 +00:00
parent 656bb20d61
commit eb18812f75
3 changed files with 53 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
lib/CodeGen/OptimizeExts.cpp
View File

@@ -110,6 +110,11 @@ bool OptimizeExts::OptimizeInstr(MachineInstr *MI, MachineBasicBlock *MBB,
MachineInstr *UseMI = &*UI;
if (UseMI == MI)
continue;
if (UseMI->getOpcode() == TargetInstrInfo::PHI) {
ExtendLife = false;
continue;
}
MachineBasicBlock *UseMBB = UseMI->getParent();
if (UseMBB == MBB) {
// Local uses that come after the extension.
@@ -117,7 +122,7 @@ bool OptimizeExts::OptimizeInstr(MachineInstr *MI, MachineBasicBlock *MBB,
Uses.push_back(&UseMO);
} else if (ReachedBBs.count(UseMBB))
// Non-local uses where the result of extension is used. Always
// replace these.
// replace these unless it's a PHI.
Uses.push_back(&UseMO);
else if (Aggressive && DT->dominates(MBB, UseMBB))
// We may want to extend live range of the extension result in order