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Since we don't handle callee-save CRs right yet, don't allocate them. Also

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don't step on R11 in the middle of a function when saving and restoring CRs


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28058 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2006-05-02 17:37:31 +00:00
parent 9d51eeb8bc
commit 426cd7c25f
2 changed files with 26 additions and 9 deletions
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14
lib/Target/PowerPC/PPCRegisterInfo.cpp
View File

@ -102,8 +102,9 @@ PPCRegisterInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
BuildMI(MBB, MI, PPC::MFLR, 1, PPC::R11);
addFrameReference(BuildMI(MBB, MI, PPC::STW, 3).addReg(PPC::R11), FrameIdx);
} else if (RC == PPC::CRRCRegisterClass) {
BuildMI(MBB, MI, PPC::MFCR, 0, PPC::R11);
addFrameReference(BuildMI(MBB, MI, PPC::STW, 3).addReg(PPC::R11), FrameIdx);
// FIXME: We use R0 here, because it isn't available for RA.
BuildMI(MBB, MI, PPC::MFCR, 0, PPC::R0);
addFrameReference(BuildMI(MBB, MI, PPC::STW, 3).addReg(PPC::R0), FrameIdx);
} else if (RC == PPC::GPRCRegisterClass) {
addFrameReference(BuildMI(MBB, MI, PPC::STW, 3).addReg(SrcReg),FrameIdx);
} else if (RC == PPC::G8RCRegisterClass) {
@ -118,7 +119,7 @@ PPCRegisterInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
// Dest = LVX R0, R11
//
// FIXME: We use R0 here, because it isn't available for RA.
addFrameReference(BuildMI(MBB, MI, PPC::ADDI, 1, PPC::R0), FrameIdx, 0, 0);
addFrameReference(BuildMI(MBB, MI, PPC::ADDI, 2, PPC::R0), FrameIdx, 0, 0);
BuildMI(MBB, MI, PPC::STVX, 3)
.addReg(SrcReg).addReg(PPC::R0).addReg(PPC::R0);
} else {
@ -136,8 +137,9 @@ PPCRegisterInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
addFrameReference(BuildMI(MBB, MI, PPC::LWZ, 2, PPC::R11), FrameIdx);
BuildMI(MBB, MI, PPC::MTLR, 1).addReg(PPC::R11);
} else if (RC == PPC::CRRCRegisterClass) {
addFrameReference(BuildMI(MBB, MI, PPC::LWZ, 2, PPC::R11), FrameIdx);
BuildMI(MBB, MI, PPC::MTCRF, 1, DestReg).addReg(PPC::R11);
// FIXME: We use R0 here, because it isn't available for RA.
addFrameReference(BuildMI(MBB, MI, PPC::LWZ, 2, PPC::R0), FrameIdx);
BuildMI(MBB, MI, PPC::MTCRF, 1, DestReg).addReg(PPC::R0);
} else if (RC == PPC::GPRCRegisterClass) {
addFrameReference(BuildMI(MBB, MI, PPC::LWZ, 2, DestReg), FrameIdx);
} else if (RC == PPC::G8RCRegisterClass) {
@ -152,7 +154,7 @@ PPCRegisterInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
// Dest = LVX R0, R11
//
// FIXME: We use R0 here, because it isn't available for RA.
addFrameReference(BuildMI(MBB, MI, PPC::ADDI, 1, PPC::R0), FrameIdx, 0, 0);
addFrameReference(BuildMI(MBB, MI, PPC::ADDI, 2, PPC::R0), FrameIdx, 0, 0);
BuildMI(MBB, MI, PPC::LVX, 2, DestReg).addReg(PPC::R0).addReg(PPC::R0);
} else {
assert(0 && "Unknown regclass!");

19
lib/Target/PowerPC/PPCRegisterInfo.td
View File

@ -264,6 +264,21 @@ def VRRC : RegisterClass<"PPC", [v16i8,v8i16,v4i32,v4f32], 128,
V6, V7, V8, V9, V10, V11, V12, V13, V14, V15, V16, V17, V18, V19, V20, V21,
V22, V23, V24, V25, V26, V27, V28, V29, V30, V31]>;
def CRRC : RegisterClass<"PPC", [i32], 32, [CR0, CR1, CR5, CR6, CR7, CR2,
CR3, CR4]>;
def CRRC : RegisterClass<"PPC", [i32], 32, [CR0, CR1, CR5, CR6, CR7, CR2, CR3, CR4]>
{
let MethodProtos = [{
iterator allocation_order_begin(MachineFunction &MF) const;
iterator allocation_order_end(MachineFunction &MF) const;
}];
let MethodBodies = [{
CRRCClass::iterator
CRRCClass::allocation_order_begin(MachineFunction &MF) const {
return begin();
}
CRRCClass::iterator
CRRCClass::allocation_order_end(MachineFunction &MF) const {
return end()-3;
}
}];
}