RPCSX/llvm
1
0
Fork 0
mirror of https://github.com/RPCSX/llvm.git synced 2024-11-29 14:40:25 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Turn on register scavenger for Mips 16

Browse Source 
We use an unused Mips 32 register for the emergency slot
instead of using the stack.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170665 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reed Kotler 2012-12-20 04:44:58 +00:00
parent 9bf571fe2c
commit 1f23239c5b
2 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
lib/Target/Mips/Mips16RegisterInfo.cpp
View File

@ -43,6 +43,32 @@ Mips16RegisterInfo::Mips16RegisterInfo(const MipsSubtarget &ST,
const Mips16InstrInfo &I)
: MipsRegisterInfo(ST), TII(I) {}
bool Mips16RegisterInfo::requiresRegisterScavenging
(const MachineFunction &MF) const {
return true;
}
bool Mips16RegisterInfo::requiresFrameIndexScavenging
(const MachineFunction &MF) const {
return true;
}
bool Mips16RegisterInfo::useFPForScavengingIndex
(const MachineFunction &MF) const {
return false;
}
bool Mips16RegisterInfo::saveScavengerRegister
(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I,
MachineBasicBlock::iterator &UseMI,
const TargetRegisterClass *RC,
unsigned Reg) const {
DebugLoc DL;
TII.copyPhysReg(MBB, I, DL, Mips::T0, Reg, true);
TII.copyPhysReg(MBB, UseMI, DL, Reg, Mips::T0, true);
return true;
}
// This function eliminate ADJCALLSTACKDOWN,
// ADJCALLSTACKUP pseudo instructions
void Mips16RegisterInfo::

13
lib/Target/Mips/Mips16RegisterInfo.h
View File

@ -27,6 +27,19 @@ public:
void eliminateCallFramePseudoInstr(MachineFunction &MF,
MachineBasicBlock &MBB,
MachineBasicBlock::iterator I) const;
bool requiresRegisterScavenging(const MachineFunction &MF) const;
bool requiresFrameIndexScavenging(const MachineFunction &MF) const;
bool useFPForScavengingIndex(const MachineFunction &MF) const;
bool saveScavengerRegister(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I,
MachineBasicBlock::iterator &UseMI,
const TargetRegisterClass *RC,
unsigned Reg) const;
private:
virtual void eliminateFI(MachineBasicBlock::iterator II, unsigned OpNo,
int FrameIndex, uint64_t StackSize,