diff options
| -rw-r--r-- | lib/Target/Mips/MipsDelaySlotFiller.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/lib/Target/Mips/MipsDelaySlotFiller.cpp b/lib/Target/Mips/MipsDelaySlotFiller.cpp index 059c111edb..b8443c1030 100644 --- a/lib/Target/Mips/MipsDelaySlotFiller.cpp +++ b/lib/Target/Mips/MipsDelaySlotFiller.cpp @@ -218,13 +218,13 @@ void Filler::insertDefsUses(MachineBasicBlock::iterator MI, SmallSet<unsigned, 32>& RegDefs, SmallSet<unsigned, 32>& RegUses) { // If MI is a call or return, just examine the explicit non-variadic operands. - // NOTE: $ra is not added to RegDefs, since currently $ra is reserved and - // no instruction that can possibly be put in a delay slot can read or - // write it. - MCInstrDesc MCID = MI->getDesc(); unsigned e = MCID.isCall() || MCID.isReturn() ? MCID.getNumOperands() : MI->getNumOperands(); + + // Add RA to RegDefs to prevent users of RA from going into delay slot. + if (MCID.isCall()) + RegDefs.insert(Mips::RA); for (unsigned i = 0; i != e; ++i) { const MachineOperand &MO = MI->getOperand(i); |