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 PassRegistry;
27   class FunctionPass;
28   class ImmutablePass;
29   class JITCodeEmitter;
30   class MachineInstr;
31   class AsmPrinter;
32   class MCInst;
33 
34   FunctionPass *createPPCCTRLoops(PPCTargetMachine &TM);
35 #ifndef NDEBUG
36   FunctionPass *createPPCCTRLoopsVerify();
37 #endif
38   FunctionPass *createPPCEarlyReturnPass();
39   FunctionPass *createPPCVSXCopyPass();
40   FunctionPass *createPPCVSXCopyCleanupPass();
41   FunctionPass *createPPCVSXFMAMutatePass();
42   FunctionPass *createPPCBranchSelectionPass();
43   FunctionPass *createPPCISelDag(PPCTargetMachine &TM);
44   FunctionPass *createPPCJITCodeEmitterPass(PPCTargetMachine &TM,
45                                             JITCodeEmitter &MCE);
46   void LowerPPCMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI,
47                                     AsmPrinter &AP, bool isDarwin);
48 
49   /// \brief Creates an PPC-specific Target Transformation Info pass.
50   ImmutablePass *createPPCTargetTransformInfoPass(const PPCTargetMachine *TM);
51 
52   void initializePPCVSXFMAMutatePass(PassRegistry&);
53   extern char &PPCVSXFMAMutateID;
54 
55   namespace PPCII {
56 
57   /// Target Operand Flag enum.
58   enum TOF {
59     //===------------------------------------------------------------------===//
60     // PPC Specific MachineOperand flags.
61     MO_NO_FLAG,
62 
63     /// MO_PLT_OR_STUB - On a symbol operand "FOO", this indicates that the
64     /// reference is actually to the "FOO$stub" or "FOO@plt" symbol.  This is
65     /// used for calls and jumps to external functions on Tiger and earlier, and
66     /// for PIC calls on Linux and ELF systems.
67     MO_PLT_OR_STUB = 1,
68 
69     /// MO_PIC_FLAG - If this bit is set, the symbol reference is relative to
70     /// the function's picbase, e.g. lo16(symbol-picbase).
71     MO_PIC_FLAG = 2,
72 
73     /// MO_NLP_FLAG - If this bit is set, the symbol reference is actually to
74     /// the non_lazy_ptr for the global, e.g. lo16(symbol$non_lazy_ptr-picbase).
75     MO_NLP_FLAG = 4,
76 
77     /// MO_NLP_HIDDEN_FLAG - If this bit is set, the symbol reference is to a
78     /// symbol with hidden visibility.  This causes a different kind of
79     /// non-lazy-pointer to be generated.
80     MO_NLP_HIDDEN_FLAG = 8,
81 
82     /// The next are not flags but distinct values.
83     MO_ACCESS_MASK = 0xf0,
84 
85     /// MO_LO, MO_HA - lo16(symbol) and ha16(symbol)
86     MO_LO = 1 << 4,
87     MO_HA = 2 << 4,
88 
89     MO_TPREL_LO = 4 << 4,
90     MO_TPREL_HA = 3 << 4,
91 
92     /// These values identify relocations on immediates folded
93     /// into memory operations.
94     MO_DTPREL_LO = 5 << 4,
95     MO_TLSLD_LO  = 6 << 4,
96     MO_TOC_LO    = 7 << 4,
97 
98     // Symbol for VK_PPC_TLS fixup attached to an ADD instruction
99     MO_TLS       = 8 << 4,
100 
101     // Symbols for VK_PPC_TLSGD and VK_PPC_TLSLD in __tls_get_addr
102     // call sequences.
103     MO_TLSLD     = 9 << 4,
104     MO_TLSGD     = 10 << 4
105   };
106   } // end namespace PPCII
107 
108 } // end namespace llvm;
109 
110 #endif
111