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Added methods to record SPOffsets from LowerFORMAL_ARGUMENTS

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llvm-svn: 41525
This commit is contained in:
Bruno Cardoso Lopes 2007-08-28 05:04:41 +00:00
parent 73aa3d62dc
commit b77d5cd9d5
1 changed files with 53 additions and 3 deletions
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56
lib/Target/Mips/MipsMachineFunction.h
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@ -14,7 +14,9 @@
#ifndef MIPS_MACHINE_FUNCTION_INFO_H
#define MIPS_MACHINE_FUNCTION_INFO_H
#include "llvm/ADT/VectorExtras.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
namespace llvm {
@ -31,9 +33,34 @@ private:
/// the Return Address must be saved
int RAStackOffset;
/// MipsFIHolder - Holds a FrameIndex and it's Stack Pointer Offset
struct MipsFIHolder {
int FI;
int SPOffset;
MipsFIHolder(int FrameIndex, int StackPointerOffset)
: FI(FrameIndex), SPOffset(StackPointerOffset) {}
};
// On LowerFORMAL_ARGUMENTS the stack size is unknown,
// so the Stack Pointer Offset calculation of "not in
// register arguments" must be postponed to emitPrologue.
SmallVector<MipsFIHolder, 16> FnLoadArgs;
bool HasLoadArgs;
// When VarArgs, we must write registers back to caller
// stack, preserving on register arguments. Since the
// stack size is unknown on LowerFORMAL_ARGUMENTS,
// the Stack Pointer Offset calculation must be
// postponed to emitPrologue.
SmallVector<MipsFIHolder, 4> FnStoreVarArgs;
bool HasStoreVarArgs;
public:
MipsFunctionInfo(MachineFunction& MF)
: FPStackOffset(0), RAStackOffset(0)
: FPStackOffset(0), RAStackOffset(0),
HasLoadArgs(false), HasStoreVarArgs(false)
{}
int getFPStackOffset() const { return FPStackOffset; }
@ -46,9 +73,32 @@ public:
return (RAStackOffset > FPStackOffset) ?
(RAStackOffset) : (FPStackOffset);
}
bool hasLoadArgs() const { return HasLoadArgs; }
bool hasStoreVarArgs() const { return HasStoreVarArgs; }
void recordLoadArgsFI(int FI, int SPOffset) {
if (!HasLoadArgs) HasLoadArgs=true;
FnLoadArgs.push_back(MipsFIHolder(FI, SPOffset));
}
void recordStoreVarArgsFI(int FI, int SPOffset) {
if (!HasStoreVarArgs) HasStoreVarArgs=true;
FnStoreVarArgs.push_back(MipsFIHolder(FI, SPOffset));
}
void adjustLoadArgsFI(MachineFrameInfo *MFI) const {
if (!hasLoadArgs()) return;
for (unsigned i = 0, e = FnLoadArgs.size(); i != e; ++i)
MFI->setObjectOffset( FnLoadArgs[i].FI, FnLoadArgs[i].SPOffset );
}
void adjustStoreVarArgsFI(MachineFrameInfo *MFI) const {
if (!hasStoreVarArgs()) return;
for (unsigned i = 0, e = FnStoreVarArgs.size(); i != e; ++i)
MFI->setObjectOffset( FnStoreVarArgs[i].FI, FnStoreVarArgs[i].SPOffset );
}
};
} // end of namespace llvm
#endif
#endif // MIPS_MACHINE_FUNCTION_INFO_H