#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 {
/// 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; }
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