diff options
Diffstat (limited to 'lib/Target/Mips/MipsDelaySlotFiller.cpp')
| -rw-r--r-- | lib/Target/Mips/MipsDelaySlotFiller.cpp | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/lib/Target/Mips/MipsDelaySlotFiller.cpp b/lib/Target/Mips/MipsDelaySlotFiller.cpp index d07a595af3..f5bb945592 100644 --- a/lib/Target/Mips/MipsDelaySlotFiller.cpp +++ b/lib/Target/Mips/MipsDelaySlotFiller.cpp @@ -527,6 +527,11 @@ FunctionPass *llvm::createMipsDelaySlotFillerPass(MipsTargetMachine &tm) { return new Filler(tm); } +// @LOCALMOD-START +extern bool IsDangerousLoad(const MachineInstr &MI, int *AddrIdx); +extern bool IsDangerousStore(const MachineInstr &MI, int *AddrIdx); +// @LOCALMOD-END + template<typename IterTy> bool Filler::searchRange(MachineBasicBlock &MBB, IterTy Begin, IterTy End, RegDefsUses &RegDU, InspectMemInstr& IM, @@ -536,8 +541,23 @@ bool Filler::searchRange(MachineBasicBlock &MBB, IterTy Begin, IterTy End, if (I->isDebugValue()) continue; - if (terminateSearch(*I)) - break; + // @LOCALMOD-START + // Don't put in delay slot instructions that could be masked. + // Should not allow: + // ERET, DERET or WAIT, PAUSE. Need to add these to instruction + // list. TBD. + if (Triple(TM.getTargetTriple()).isOSNaCl()) { + int Dummy; + if (terminateSearch(*I) || (IsDangerousLoad(*I, &Dummy) + || IsDangerousStore(*I, &Dummy) + || I->modifiesRegister(Mips::SP, + TM.getRegisterInfo()))) + break; + } else { + if (terminateSearch(*I)) + break; + } + // @LOCALMOD-END assert((!I->isCall() && !I->isReturn() && !I->isBranch()) && "Cannot put calls, returns or branches in delay slot."); |