6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-14 11:32:34 +00:00
Code Issues Projects Releases Wiki Activity

Repair bundles that were broken by removing and reinserting the first

Browse Source 
instruction.

This isn't strictly necessary at the moment because Thumb2SizeReduction
also copies all MI flags from the old instruction to the new. However, a
future patch will make that kind of direct flag tampering illegal.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170395 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2012-12-18 00:46:39 +00:00
parent d57a598773
commit bcc9a89c16
1 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
lib/Target/ARM/Thumb2SizeReduction.cpp
View File

@ -896,13 +896,20 @@ bool Thumb2SizeReduce::ReduceMBB(MachineBasicBlock &MBB) {
LiveCPSR = UpdateCPSRUse(*MI, LiveCPSR);
// Does NextMII belong to the same bundle as MI?
bool NextInSameBundle = NextMII != E && NextMII->isBundledWithPred();
if (ReduceMI(MBB, MI, LiveCPSR, CPSRDef, IsSelfLoop)) {
Modified = true;
MachineBasicBlock::instr_iterator I = prior(NextMII);
MI = &*I;
// Removing and reinserting the first instruction in a bundle will break
// up the bundle. Fix the bundling if it was broken.
if (NextInSameBundle && !NextMII->isBundledWithPred())
NextMII->bundleWithPred();
}
if (NextMII != E && MI->isInsideBundle() && !NextMII->isInsideBundle()) {
if (!NextInSameBundle && MI->isInsideBundle()) {
// FIXME: Since post-ra scheduler operates on bundles, the CPSR kill
// marker is only on the BUNDLE instruction. Process the BUNDLE
// instruction as we finish with the bundled instruction to work around