mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-02-22 13:29:44 +00:00
Blackfin always uses a reserved call frame.
Materializing the stack pointer update before a call requires a scratch register that may not be available. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132601 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
ec281c8934
commit
7b5fdc7fbd
@ -31,6 +31,12 @@ bool BlackfinFrameLowering::hasFP(const MachineFunction &MF) const {
|
|||||||
MFI->adjustsStack() || MFI->hasVarSizedObjects();
|
MFI->adjustsStack() || MFI->hasVarSizedObjects();
|
||||||
}
|
}
|
||||||
|
|
||||||
|
// Always reserve a call frame. We dont have enough registers to adjust SP.
|
||||||
|
bool BlackfinFrameLowering::
|
||||||
|
hasReservedCallFrame(const MachineFunction &MF) const {
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
// Emit a prologue that sets up a stack frame.
|
// Emit a prologue that sets up a stack frame.
|
||||||
// On function entry, R0-R2 and P0 may hold arguments.
|
// On function entry, R0-R2 and P0 may hold arguments.
|
||||||
// R3, P1, and P2 may be used as scratch registers
|
// R3, P1, and P2 may be used as scratch registers
|
||||||
|
@ -36,6 +36,7 @@ public:
|
|||||||
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
|
void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
|
||||||
|
|
||||||
bool hasFP(const MachineFunction &MF) const;
|
bool hasFP(const MachineFunction &MF) const;
|
||||||
|
bool hasReservedCallFrame(const MachineFunction &MF) const;
|
||||||
|
|
||||||
void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
|
void processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
|
||||||
RegScavenger *RS) const;
|
RegScavenger *RS) const;
|
||||||
|
@ -41,8 +41,6 @@ namespace llvm {
|
|||||||
return &BF::PRegClass;
|
return &BF::PRegClass;
|
||||||
}
|
}
|
||||||
|
|
||||||
// bool hasReservedCallFrame(MachineFunction &MF) const;
|
|
||||||
|
|
||||||
bool requiresRegisterScavenging(const MachineFunction &MF) const;
|
bool requiresRegisterScavenging(const MachineFunction &MF) const;
|
||||||
|
|
||||||
void eliminateCallFramePseudoInstr(MachineFunction &MF,
|
void eliminateCallFramePseudoInstr(MachineFunction &MF,
|
||||||
|
Loading…
x
Reference in New Issue
Block a user