/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.cpp
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1 | | //===-- AArch64MCExpr.cpp - AArch64 specific MC expression classes --------===// |
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 implementation of the assembly expression modifiers |
11 | | // accepted by the AArch64 architecture (e.g. ":lo12:", ":gottprel_g1:", ...). |
12 | | // |
13 | | //===----------------------------------------------------------------------===// |
14 | | |
15 | | #include "AArch64MCExpr.h" |
16 | | #include "llvm/MC/MCAssembler.h" |
17 | | #include "llvm/MC/MCContext.h" |
18 | | #include "llvm/MC/MCStreamer.h" |
19 | | #include "llvm/MC/MCSymbolELF.h" |
20 | | #include "llvm/MC/MCValue.h" |
21 | | #include "llvm/Object/ELF.h" |
22 | | #include "llvm/Support/ErrorHandling.h" |
23 | | |
24 | | using namespace llvm; |
25 | | |
26 | | #define DEBUG_TYPE "aarch64symbolrefexpr" |
27 | | |
28 | | const AArch64MCExpr *AArch64MCExpr::create(const MCExpr *Expr, VariantKind Kind, |
29 | 7.26k | MCContext &Ctx) { |
30 | 7.26k | return new (Ctx) AArch64MCExpr(Expr, Kind); |
31 | 7.26k | } |
32 | | |
33 | 6.98k | StringRef AArch64MCExpr::getVariantKindName() const { |
34 | 6.98k | switch (static_cast<uint32_t>(getKind())) { |
35 | 1.26k | case VK_CALL: return ""; |
36 | 2.63k | case VK_LO12: return ":lo12:"; |
37 | 40 | case VK_ABS_G3: return ":abs_g3:"; |
38 | 5 | case VK_ABS_G2: return ":abs_g2:"; |
39 | 4 | case VK_ABS_G2_S: return ":abs_g2_s:"; |
40 | 37 | case VK_ABS_G2_NC: return ":abs_g2_nc:"; |
41 | 5 | case VK_ABS_G1: return ":abs_g1:"; |
42 | 8 | case VK_ABS_G1_S: return ":abs_g1_s:"; |
43 | 37 | case VK_ABS_G1_NC: return ":abs_g1_nc:"; |
44 | 5 | case VK_ABS_G0: return ":abs_g0:"; |
45 | 8 | case VK_ABS_G0_S: return ":abs_g0_s:"; |
46 | 37 | case VK_ABS_G0_NC: return ":abs_g0_nc:"; |
47 | 12 | case VK_DTPREL_G2: return ":dtprel_g2:"; |
48 | 14 | case VK_DTPREL_G1: return ":dtprel_g1:"; |
49 | 8 | case VK_DTPREL_G1_NC: return ":dtprel_g1_nc:"; |
50 | 14 | case VK_DTPREL_G0: return ":dtprel_g0:"; |
51 | 8 | case VK_DTPREL_G0_NC: return ":dtprel_g0_nc:"; |
52 | 8 | case VK_DTPREL_HI12: return ":dtprel_hi12:"; |
53 | 78 | case VK_DTPREL_LO12: return ":dtprel_lo12:"; |
54 | 88 | case VK_DTPREL_LO12_NC: return ":dtprel_lo12_nc:"; |
55 | 8 | case VK_TPREL_G2: return ":tprel_g2:"; |
56 | 14 | case VK_TPREL_G1: return ":tprel_g1:"; |
57 | 8 | case VK_TPREL_G1_NC: return ":tprel_g1_nc:"; |
58 | 14 | case VK_TPREL_G0: return ":tprel_g0:"; |
59 | 8 | case VK_TPREL_G0_NC: return ":tprel_g0_nc:"; |
60 | 11 | case VK_TPREL_HI12: return ":tprel_hi12:"; |
61 | 78 | case VK_TPREL_LO12: return ":tprel_lo12:"; |
62 | 91 | case VK_TPREL_LO12_NC: return ":tprel_lo12_nc:"; |
63 | 58 | case VK_TLSDESC_LO12: return ":tlsdesc_lo12:"; |
64 | 2.15k | case VK_ABS_PAGE: return ""; |
65 | 0 | case VK_ABS_PAGE_NC: return ":pg_hi21_nc:"; |
66 | 63 | case VK_GOT_PAGE: return ":got:"; |
67 | 69 | case VK_GOT_LO12: return ":got_lo12:"; |
68 | 18 | case VK_GOTTPREL_PAGE: return ":gottprel:"; |
69 | 20 | case VK_GOTTPREL_LO12_NC: return ":gottprel_lo12:"; |
70 | 6 | case VK_GOTTPREL_G1: return ":gottprel_g1:"; |
71 | 6 | case VK_GOTTPREL_G0_NC: return ":gottprel_g0_nc:"; |
72 | 17 | case VK_TLSDESC: return ""; |
73 | 23 | case VK_TLSDESC_PAGE: return ":tlsdesc:"; |
74 | 0 | default: |
75 | 0 | llvm_unreachable("Invalid ELF symbol kind"); |
76 | 0 | } |
77 | 0 | } |
78 | | |
79 | 6.98k | void AArch64MCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const { |
80 | 6.98k | if (getKind() != VK_NONE) |
81 | 6.98k | OS << getVariantKindName(); |
82 | 6.98k | Expr->print(OS, MAI); |
83 | 6.98k | } |
84 | | |
85 | 589 | void AArch64MCExpr::visitUsedExpr(MCStreamer &Streamer) const { |
86 | 589 | Streamer.visitUsedExpr(*getSubExpr()); |
87 | 589 | } |
88 | | |
89 | 0 | MCFragment *AArch64MCExpr::findAssociatedFragment() const { |
90 | 0 | llvm_unreachable("FIXME: what goes here?"); |
91 | 0 | } |
92 | | |
93 | | bool AArch64MCExpr::evaluateAsRelocatableImpl(MCValue &Res, |
94 | | const MCAsmLayout *Layout, |
95 | 589 | const MCFixup *Fixup) const { |
96 | 589 | if (!getSubExpr()->evaluateAsRelocatable(Res, Layout, Fixup)) |
97 | 0 | return false; |
98 | 589 | |
99 | 589 | Res = |
100 | 589 | MCValue::get(Res.getSymA(), Res.getSymB(), Res.getConstant(), getKind()); |
101 | 589 | |
102 | 589 | return true; |
103 | 589 | } |
104 | | |
105 | 364 | static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) { |
106 | 364 | switch (Expr->getKind()) { |
107 | 0 | case MCExpr::Target: |
108 | 0 | llvm_unreachable("Can't handle nested target expression"); |
109 | 0 | break; |
110 | 10 | case MCExpr::Constant: |
111 | 10 | break; |
112 | 364 | |
113 | 10 | case MCExpr::Binary: { |
114 | 10 | const MCBinaryExpr *BE = cast<MCBinaryExpr>(Expr); |
115 | 10 | fixELFSymbolsInTLSFixupsImpl(BE->getLHS(), Asm); |
116 | 10 | fixELFSymbolsInTLSFixupsImpl(BE->getRHS(), Asm); |
117 | 10 | break; |
118 | 364 | } |
119 | 364 | |
120 | 344 | case MCExpr::SymbolRef: { |
121 | 344 | // We're known to be under a TLS fixup, so any symbol should be |
122 | 344 | // modified. There should be only one. |
123 | 344 | const MCSymbolRefExpr &SymRef = *cast<MCSymbolRefExpr>(Expr); |
124 | 344 | cast<MCSymbolELF>(SymRef.getSymbol()).setType(ELF::STT_TLS); |
125 | 344 | break; |
126 | 364 | } |
127 | 364 | |
128 | 0 | case MCExpr::Unary: |
129 | 0 | fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm); |
130 | 0 | break; |
131 | 364 | } |
132 | 364 | } |
133 | | |
134 | 580 | void AArch64MCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const { |
135 | 580 | switch (getSymbolLoc(Kind)) { |
136 | 236 | default: |
137 | 236 | return; |
138 | 344 | case VK_DTPREL: |
139 | 344 | case VK_GOTTPREL: |
140 | 344 | case VK_TPREL: |
141 | 344 | case VK_TLSDESC: |
142 | 344 | break; |
143 | 344 | } |
144 | 344 | |
145 | 344 | fixELFSymbolsInTLSFixupsImpl(getSubExpr(), Asm); |
146 | 344 | } |