6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-10 18:34:09 +00:00
Code Issues Projects Releases Wiki Activity

Add dynamic realignment when rematerializing the base register.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116886 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2010-10-20 00:02:50 +00:00
parent f6d7df6f21
commit 8b95c3ebfb
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
lib/Target/ARM/ARMExpandPseudoInsts.cpp
View File

@ -606,6 +606,19 @@ bool ARMExpandPseudo::ExpandMBB(MachineBasicBlock &MBB) {
FramePtr, -NumBytes, ARMCC::AL, 0, FramePtr, -NumBytes, ARMCC::AL, 0,
*TII); *TII);
} }
// If there's dynamic realignment, adjust for it.
if (!RI.needsStackRealignment(MF)) {
MachineFrameInfo *MFI = MF.getFrameInfo();
unsigned MaxAlign = MFI->getMaxAlignment();
assert (!AFI->isThumb1OnlyFunction());
// Emit bic r6, r6, MaxAlign
unsigned bicOpc = AFI->isThumbFunction() ?
ARM::t2BICri : ARM::BICri;
AddDefaultCC(AddDefaultPred(BuildMI(MBB, MBBI, MI.getDebugLoc(),
TII->get(bicOpc), ARM::R6)
.addReg(ARM::R6, RegState::Kill)
.addImm(MaxAlign-1)));
}
} }
MI.eraseFromParent(); MI.eraseFromParent();