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https://github.com/c64scene-ar/llvm-6502.git
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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++ -*-=//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H
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#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINEFUNCTIONINFO_H
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#include "llvm/CodeGen/MachineFunction.h"
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namespace llvm {
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class SystemZMachineFunctionInfo : public MachineFunctionInfo {
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virtual void anchor();
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unsigned LowSavedGPR;
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unsigned HighSavedGPR;
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unsigned VarArgsFirstGPR;
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unsigned VarArgsFirstFPR;
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unsigned VarArgsFrameIndex;
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unsigned RegSaveFrameIndex;
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bool ManipulatesSP;
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unsigned NumLocalDynamics;
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public:
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explicit SystemZMachineFunctionInfo(MachineFunction &MF)
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: LowSavedGPR(0), HighSavedGPR(0), VarArgsFirstGPR(0), VarArgsFirstFPR(0),
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VarArgsFrameIndex(0), RegSaveFrameIndex(0), ManipulatesSP(false),
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NumLocalDynamics(0) {}
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// Get and set the first call-saved GPR that should be saved and restored
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// by this function. This is 0 if no GPRs need to be saved or restored.
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unsigned getLowSavedGPR() const { return LowSavedGPR; }
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void setLowSavedGPR(unsigned Reg) { LowSavedGPR = Reg; }
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// Get and set the last call-saved GPR that should be saved and restored
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// by this function.
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unsigned getHighSavedGPR() const { return HighSavedGPR; }
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void setHighSavedGPR(unsigned Reg) { HighSavedGPR = Reg; }
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// Get and set the number of fixed (as opposed to variable) arguments
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// that are passed in GPRs to this function.
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unsigned getVarArgsFirstGPR() const { return VarArgsFirstGPR; }
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void setVarArgsFirstGPR(unsigned GPR) { VarArgsFirstGPR = GPR; }
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// Likewise FPRs.
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unsigned getVarArgsFirstFPR() const { return VarArgsFirstFPR; }
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void setVarArgsFirstFPR(unsigned FPR) { VarArgsFirstFPR = FPR; }
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// Get and set the frame index of the first stack vararg.
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unsigned getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
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void setVarArgsFrameIndex(unsigned FI) { VarArgsFrameIndex = FI; }
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// Get and set the frame index of the register save area
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// (i.e. the incoming stack pointer).
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unsigned getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
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void setRegSaveFrameIndex(unsigned FI) { RegSaveFrameIndex = FI; }
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// Get and set whether the function directly manipulates the stack pointer,
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// e.g. through STACKSAVE or STACKRESTORE.
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bool getManipulatesSP() const { return ManipulatesSP; }
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void setManipulatesSP(bool MSP) { ManipulatesSP = MSP; }
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// Count number of local-dynamic TLS symbols used.
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unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; }
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void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; }
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};
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} // end namespace llvm
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#endif
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