diff options
Diffstat (limited to 'lib/CodeGen/RegisterPressure.cpp')
| -rw-r--r-- | lib/CodeGen/RegisterPressure.cpp | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/lib/CodeGen/RegisterPressure.cpp b/lib/CodeGen/RegisterPressure.cpp index 94779770e0..543c426458 100644 --- a/lib/CodeGen/RegisterPressure.cpp +++ b/lib/CodeGen/RegisterPressure.cpp @@ -64,7 +64,7 @@ void RegisterPressure::decrease(const TargetRegisterClass *RC, } #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) -void RegisterPressure::dump(const TargetRegisterInfo *TRI) { +void RegisterPressure::dump(const TargetRegisterInfo *TRI) const { dbgs() << "Live In: "; for (unsigned i = 0, e = LiveInRegs.size(); i < e; ++i) dbgs() << PrintReg(LiveInRegs[i], TRI) << " "; @@ -322,10 +322,8 @@ struct RegisterOperands { if (findReg(MO.getReg(), isVReg, DeadDefs, TRI) == DeadDefs.end()) DeadDefs.push_back(MO.getReg()); } - else { - if (findReg(MO.getReg(), isVReg, Defs, TRI) == Defs.end()) - Defs.push_back(MO.getReg()); - } + else if (findReg(MO.getReg(), isVReg, Defs, TRI) == Defs.end()) + Defs.push_back(MO.getReg()); } } }; @@ -676,9 +674,16 @@ void RegPressureTracker::bumpUpwardPressure(const MachineInstr *MI) { decreaseVirtRegPressure(VirtRegOpers.DeadDefs); // Kill liveness at live defs. - decreasePhysRegPressure(PhysRegOpers.Defs); - decreaseVirtRegPressure(VirtRegOpers.Defs); - + for (unsigned i = 0, e = PhysRegOpers.Defs.size(); i < e; ++i) { + unsigned Reg = PhysRegOpers.Defs[i]; + if (!findReg(Reg, false, PhysRegOpers.Uses, TRI)) + decreasePhysRegPressure(PhysRegOpers.Defs); + } + for (unsigned i = 0, e = VirtRegOpers.Defs.size(); i < e; ++i) { + unsigned Reg = VirtRegOpers.Defs[i]; + if (!findReg(Reg, true, VirtRegOpers.Uses, TRI)) + decreaseVirtRegPressure(VirtRegOpers.Defs); + } // Generate liveness for uses. for (unsigned i = 0, e = PhysRegOpers.Uses.size(); i < e; ++i) { unsigned Reg = PhysRegOpers.Uses[i]; |