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Implement initial prolog/epilog code insertion methods. 

llvm-svn: 11979
This commit is contained in:
Chris Lattner 2004-02-29 05:18:30 +00:00
parent 5e7b3180e5
commit e5f08917ae
2 changed files with 17 additions and 6 deletions
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20
llvm/lib/Target/SparcV8/SparcV8RegisterInfo.cpp
View File

@ -13,7 +13,10 @@
#include "SparcV8.h"
#include "SparcV8RegisterInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/Type.h"
#include "Support/STLExtras.h"
using namespace llvm;
SparcV8RegisterInfo::SparcV8RegisterInfo()
@ -60,18 +63,23 @@ SparcV8RegisterInfo::eliminateFrameIndex(MachineFunction &MF,
abort();
}
void SparcV8RegisterInfo::processFunctionBeforeFrameFinalized(
MachineFunction &MF) const {
abort();
}
void SparcV8RegisterInfo::
processFunctionBeforeFrameFinalized(MachineFunction &MF) const {}
void SparcV8RegisterInfo::emitPrologue(MachineFunction &MF) const {
abort();
MachineBasicBlock &MBB = MF.front();
// Eventually this should emit the correct save instruction based on the
// number of bytes in the frame. For now we just hardcode it.
BuildMI(MBB, MBB.begin(), V8::SAVEi, 2, V8::SP).addImm(-122).addReg(V8::SP);
}
void SparcV8RegisterInfo::emitEpilogue(MachineFunction &MF,
MachineBasicBlock &MBB) const {
abort();
MachineBasicBlock::iterator MBBI = prior(MBB.end());
assert(MBBI->getOpcode() == V8::JMPLi &&
"Can only put epilog before return instruction!");
BuildMI(MBB, MBBI, V8::RESTOREi, 2, V8::O0).addImm(0).addReg(V8::L7);
}

3
llvm/lib/Target/SparcV8/SparcV8RegisterInfo.td
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@ -26,6 +26,9 @@ let Namespace = "V8" in {
def I0 : Ri<24>; def I1 : Ri<25>; def I2 : Ri<26>; def I3 : Ri<27>;
def I4 : Ri<28>; def I5 : Ri<29>; def I6 : Ri<30>; def I7 : Ri<31>;
// Standard register aliases.
def SP : Ri<14>; def FP : Ri<30>;
// Floating-point registers?
// ...
}