mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-05 13:29:22 +00:00
bebd59c74b
The current SystemZ back-end only supports the local-exec TLS access model. This patch adds all required CodeGen support for the other TLS models, which means in particular: - Expand initial-exec TLS accesses by loading TLS offsets from the GOT using @indntpoff relocations. - Expand general-dynamic and local-dynamic accesses by generating the appropriate calls to __tls_get_offset. Note that this routine has a non-standard ABI and requires loading the GOT pointer into %r12, so the patch also adds support for the GLOBAL_OFFSET_TABLE ISD node. - Add a new platform-specific optimization pass to remove redundant __tls_get_offset calls in the local-dynamic model (modeled after the corresponding X86 pass). - Add test cases verifying all access models and optimizations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229654 91177308-0d34-0410-b5e6-96231b3b80d8
75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
//==- SystemZMachineFuctionInfo.h - SystemZ machine function info -*- C++ -*-=//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H
|
|
#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H
|
|
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
|
|
namespace llvm {
|
|
|
|
class SystemZMachineFunctionInfo : public MachineFunctionInfo {
|
|
virtual void anchor();
|
|
unsigned LowSavedGPR;
|
|
unsigned HighSavedGPR;
|
|
unsigned VarArgsFirstGPR;
|
|
unsigned VarArgsFirstFPR;
|
|
unsigned VarArgsFrameIndex;
|
|
unsigned RegSaveFrameIndex;
|
|
bool ManipulatesSP;
|
|
unsigned NumLocalDynamics;
|
|
|
|
public:
|
|
explicit SystemZMachineFunctionInfo(MachineFunction &MF)
|
|
: LowSavedGPR(0), HighSavedGPR(0), VarArgsFirstGPR(0), VarArgsFirstFPR(0),
|
|
VarArgsFrameIndex(0), RegSaveFrameIndex(0), ManipulatesSP(false),
|
|
NumLocalDynamics(0) {}
|
|
|
|
// Get and set the first call-saved GPR that should be saved and restored
|
|
// by this function. This is 0 if no GPRs need to be saved or restored.
|
|
unsigned getLowSavedGPR() const { return LowSavedGPR; }
|
|
void setLowSavedGPR(unsigned Reg) { LowSavedGPR = Reg; }
|
|
|
|
// Get and set the last call-saved GPR that should be saved and restored
|
|
// by this function.
|
|
unsigned getHighSavedGPR() const { return HighSavedGPR; }
|
|
void setHighSavedGPR(unsigned Reg) { HighSavedGPR = Reg; }
|
|
|
|
// Get and set the number of fixed (as opposed to variable) arguments
|
|
// that are passed in GPRs to this function.
|
|
unsigned getVarArgsFirstGPR() const { return VarArgsFirstGPR; }
|
|
void setVarArgsFirstGPR(unsigned GPR) { VarArgsFirstGPR = GPR; }
|
|
|
|
// Likewise FPRs.
|
|
unsigned getVarArgsFirstFPR() const { return VarArgsFirstFPR; }
|
|
void setVarArgsFirstFPR(unsigned FPR) { VarArgsFirstFPR = FPR; }
|
|
|
|
// Get and set the frame index of the first stack vararg.
|
|
unsigned getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
|
|
void setVarArgsFrameIndex(unsigned FI) { VarArgsFrameIndex = FI; }
|
|
|
|
// Get and set the frame index of the register save area
|
|
// (i.e. the incoming stack pointer).
|
|
unsigned getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
|
|
void setRegSaveFrameIndex(unsigned FI) { RegSaveFrameIndex = FI; }
|
|
|
|
// Get and set whether the function directly manipulates the stack pointer,
|
|
// e.g. through STACKSAVE or STACKRESTORE.
|
|
bool getManipulatesSP() const { return ManipulatesSP; }
|
|
void setManipulatesSP(bool MSP) { ManipulatesSP = MSP; }
|
|
|
|
// Count number of local-dynamic TLS symbols used.
|
|
unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; }
|
|
void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; }
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|