1 //===-- PPC.h - Top-level interface for PowerPC Target ----------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains the entry points for global functions defined in the LLVM
11 // PowerPC back-end.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_TARGET_POWERPC_H
16 #define LLVM_TARGET_POWERPC_H
17 
18 #include "MCTargetDesc/PPCMCTargetDesc.h"
19 #include <string>
20 
21 // GCC #defines PPC on Linux but we use it as our namespace name
22 #undef PPC
23 
24 namespace llvm {
25   class PPCTargetMachine;
26   class FunctionPass;
27   class ImmutablePass;
28   class JITCodeEmitter;
29   class MachineInstr;
30   class AsmPrinter;
31   class MCInst;
32 
33   FunctionPass *createPPCCTRLoops(PPCTargetMachine &TM);
34 #ifndef NDEBUG
35   FunctionPass *createPPCCTRLoopsVerify();
36 #endif
37   FunctionPass *createPPCEarlyReturnPass();
38   FunctionPass *createPPCBranchSelectionPass();
39   FunctionPass *createPPCISelDag(PPCTargetMachine &TM);
40   FunctionPass *createPPCJITCodeEmitterPass(PPCTargetMachine &TM,
41                                             JITCodeEmitter &MCE);
42   void LowerPPCMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI,
43                                     AsmPrinter &AP, bool isDarwin);
44 
45   /// \brief Creates an PPC-specific Target Transformation Info pass.
46   ImmutablePass *createPPCTargetTransformInfoPass(const PPCTargetMachine *TM);
47 
48   namespace PPCII {
49 
50   /// Target Operand Flag enum.
51   enum TOF {
52     //===------------------------------------------------------------------===//
53     // PPC Specific MachineOperand flags.
54     MO_NO_FLAG,
55 
56     /// MO_PLT_OR_STUB - On a symbol operand "FOO", this indicates that the
57     /// reference is actually to the "FOO$stub" or "FOO@plt" symbol.  This is
58     /// used for calls and jumps to external functions on Tiger and earlier, and
59     /// for PIC calls on Linux and ELF systems.
60     MO_PLT_OR_STUB = 1,
61 
62     /// MO_PIC_FLAG - If this bit is set, the symbol reference is relative to
63     /// the function's picbase, e.g. lo16(symbol-picbase).
64     MO_PIC_FLAG = 2,
65 
66     /// MO_NLP_FLAG - If this bit is set, the symbol reference is actually to
67     /// the non_lazy_ptr for the global, e.g. lo16(symbol$non_lazy_ptr-picbase).
68     MO_NLP_FLAG = 4,
69 
70     /// MO_NLP_HIDDEN_FLAG - If this bit is set, the symbol reference is to a
71     /// symbol with hidden visibility.  This causes a different kind of
72     /// non-lazy-pointer to be generated.
73     MO_NLP_HIDDEN_FLAG = 8,
74 
75     /// The next are not flags but distinct values.
76     MO_ACCESS_MASK = 0xf0,
77 
78     /// MO_LO, MO_HA - lo16(symbol) and ha16(symbol)
79     MO_LO = 1 << 4,
80     MO_HA = 2 << 4,
81 
82     MO_TPREL_LO = 4 << 4,
83     MO_TPREL_HA = 3 << 4,
84 
85     /// These values identify relocations on immediates folded
86     /// into memory operations.
87     MO_DTPREL_LO = 5 << 4,
88     MO_TLSLD_LO  = 6 << 4,
89     MO_TOC_LO    = 7 << 4,
90 
91     // Symbol for VK_PPC_TLS fixup attached to an ADD instruction
92     MO_TLS       = 8 << 4
93   };
94   } // end namespace PPCII
95 
96 } // end namespace llvm;
97 
98 #endif
99