diff options
Diffstat (limited to 'llvm/lib/CodeGen/MachineLoopInfo.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineLoopInfo.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/MachineLoopInfo.cpp b/llvm/lib/CodeGen/MachineLoopInfo.cpp index 8f91a5b..9b96bc5 100644 --- a/llvm/lib/CodeGen/MachineLoopInfo.cpp +++ b/llvm/lib/CodeGen/MachineLoopInfo.cpp @@ -18,6 +18,7 @@ #include "llvm/CodeGen/MachineDominators.h" #include "llvm/CodeGen/MachineRegisterInfo.h" #include "llvm/CodeGen/Passes.h" +#include "llvm/CodeGen/TargetInstrInfo.h" #include "llvm/CodeGen/TargetSubtargetInfo.h" #include "llvm/Config/llvm-config.h" #include "llvm/InitializePasses.h" @@ -154,7 +155,9 @@ MachineLoopInfo::findLoopPreheader(MachineLoop *L, bool SpeculativePreheader, bool MachineLoop::isLoopInvariant(MachineInstr &I) const { MachineFunction *MF = I.getParent()->getParent(); MachineRegisterInfo *MRI = &MF->getRegInfo(); - const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo(); + const TargetSubtargetInfo &ST = MF->getSubtarget(); + const TargetRegisterInfo *TRI = ST.getRegisterInfo(); + const TargetInstrInfo *TII = ST.getInstrInfo(); // The instruction is loop invariant if all of its operands are. for (const MachineOperand &MO : I.operands()) { @@ -174,7 +177,8 @@ bool MachineLoop::isLoopInvariant(MachineInstr &I) const { // However, if the physreg is known to always be caller saved/restored // then this use is safe to hoist. if (!MRI->isConstantPhysReg(Reg) && - !(TRI->isCallerPreservedPhysReg(Reg.asMCReg(), *I.getMF()))) + !(TRI->isCallerPreservedPhysReg(Reg.asMCReg(), *I.getMF())) && + !TII->isIgnorableUse(MO)) return false; // Otherwise it's safe to move. continue; |