/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/lib/Target/ARM/MCTargetDesc/ARMAsmBackend.h
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1 | | //===-- ARMAsmBackend.h - ARM Assembler Backend -----------------*- 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 | | #ifndef LLVM_LIB_TARGET_ARM_ARMASMBACKEND_H |
11 | | #define LLVM_LIB_TARGET_ARM_ARMASMBACKEND_H |
12 | | |
13 | | #include "MCTargetDesc/ARMFixupKinds.h" |
14 | | #include "MCTargetDesc/ARMMCTargetDesc.h" |
15 | | #include "llvm/MC/MCAsmBackend.h" |
16 | | #include "llvm/MC/MCSubtargetInfo.h" |
17 | | #include "llvm/Support/TargetRegistry.h" |
18 | | |
19 | | namespace llvm { |
20 | | |
21 | | class ARMAsmBackend : public MCAsmBackend { |
22 | | const MCSubtargetInfo *STI; |
23 | | bool isThumbMode; // Currently emitting Thumb code. |
24 | | bool IsLittleEndian; // Big or little endian. |
25 | | public: |
26 | | ARMAsmBackend(const Target &T, const Triple &TT, bool IsLittle) |
27 | | : MCAsmBackend(), STI(ARM_MC::createARMMCSubtargetInfo(TT, "", "")), |
28 | | isThumbMode(TT.getArchName().startswith("thumb")), |
29 | 5.71k | IsLittleEndian(IsLittle) {} |
30 | | |
31 | 5.68k | ~ARMAsmBackend() override { delete STI; } |
32 | | |
33 | 0 | unsigned getNumFixupKinds() const override { |
34 | 0 | return ARM::NumTargetFixupKinds; |
35 | 0 | } |
36 | | |
37 | 8.76k | bool hasNOP() const { return STI->getFeatureBits()[ARM::HasV6T2Ops]; } |
38 | | |
39 | | const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override; |
40 | | |
41 | | bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup, |
42 | | const MCValue &Target) override; |
43 | | |
44 | | unsigned adjustFixupValue(const MCAssembler &Asm, const MCFixup &Fixup, |
45 | | const MCValue &Target, uint64_t Value, |
46 | | bool IsResolved, MCContext &Ctx, |
47 | | bool IsLittleEndian) const; |
48 | | |
49 | | void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup, |
50 | | const MCValue &Target, MutableArrayRef<char> Data, |
51 | | uint64_t Value, bool IsResolved) const override; |
52 | | |
53 | | unsigned getRelaxedOpcode(unsigned Op) const; |
54 | | |
55 | | bool mayNeedRelaxation(const MCInst &Inst) const override; |
56 | | |
57 | | const char *reasonForFixupRelaxation(const MCFixup &Fixup, |
58 | | uint64_t Value) const; |
59 | | |
60 | | bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value, |
61 | | const MCRelaxableFragment *DF, |
62 | | const MCAsmLayout &Layout) const override; |
63 | | |
64 | | void relaxInstruction(const MCInst &Inst, const MCSubtargetInfo &STI, |
65 | | MCInst &Res) const override; |
66 | | |
67 | | bool writeNopData(uint64_t Count, MCObjectWriter *OW) const override; |
68 | | |
69 | | void handleAssemblerFlag(MCAssemblerFlag Flag) override; |
70 | | |
71 | 0 | unsigned getPointerSize() const { return 4; } |
72 | 8.76k | bool isThumb() const { return isThumbMode; } |
73 | 6.13k | void setIsThumb(bool it) { isThumbMode = it; } |
74 | 354 | bool isLittle() const { return IsLittleEndian; } |
75 | | }; |
76 | | } // end namespace llvm |
77 | | |
78 | | #endif |