/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/lib/MC/MCSection.cpp
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1 | | //===- lib/MC/MCSection.cpp - Machine Code Section Representation ---------===// |
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 | | #include "llvm/MC/MCSection.h" |
11 | | #include "llvm/ADT/SmallVector.h" |
12 | | #include "llvm/MC/MCContext.h" |
13 | | #include "llvm/MC/MCFragment.h" |
14 | | #include "llvm/MC/MCSymbol.h" |
15 | | #include "llvm/Support/Compiler.h" |
16 | | #include "llvm/Support/ErrorHandling.h" |
17 | | #include "llvm/Support/raw_ostream.h" |
18 | | #include <algorithm> |
19 | | #include <utility> |
20 | | |
21 | | using namespace llvm; |
22 | | |
23 | | MCSection::MCSection(SectionVariant V, SectionKind K, MCSymbol *Begin) |
24 | | : Begin(Begin), BundleGroupBeforeFirstInst(false), HasInstructions(false), |
25 | 2.16M | IsRegistered(false), DummyFragment(this), Variant(V), Kind(K) {} |
26 | | |
27 | 949 | MCSymbol *MCSection::getEndSymbol(MCContext &Ctx) { |
28 | 949 | if (!End) |
29 | 871 | End = Ctx.createTempSymbol("sec_end", true); |
30 | 949 | return End; |
31 | 949 | } |
32 | | |
33 | 0 | bool MCSection::hasEnded() const { return End && 0 End->isInSection()0 ; } |
34 | | |
35 | 2.15M | MCSection::~MCSection() = default; |
36 | | |
37 | 1.18k | void MCSection::setBundleLockState(BundleLockStateType NewState) { |
38 | 1.18k | if (NewState == NotBundleLocked1.18k ) { |
39 | 591 | if (BundleLockNestingDepth == 0591 ) { |
40 | 0 | report_fatal_error("Mismatched bundle_lock/unlock directives"); |
41 | 0 | } |
42 | 591 | if (591 --BundleLockNestingDepth == 0591 ) { |
43 | 583 | BundleLockState = NotBundleLocked; |
44 | 583 | } |
45 | 591 | return; |
46 | 591 | } |
47 | 592 | |
48 | 592 | // If any of the directives is an align_to_end directive, the whole nested |
49 | 592 | // group is align_to_end. So don't downgrade from align_to_end to just locked. |
50 | 592 | if (592 BundleLockState != BundleLockedAlignToEnd592 ) { |
51 | 590 | BundleLockState = NewState; |
52 | 590 | } |
53 | 1.18k | ++BundleLockNestingDepth; |
54 | 1.18k | } |
55 | | |
56 | | MCSection::iterator |
57 | 530k | MCSection::getSubsectionInsertionPoint(unsigned Subsection) { |
58 | 530k | if (Subsection == 0 && 530k SubsectionFragmentMap.empty()530k ) |
59 | 530k | return end(); |
60 | 9 | |
61 | 9 | SmallVectorImpl<std::pair<unsigned, MCFragment *>>::iterator MI = |
62 | 9 | std::lower_bound(SubsectionFragmentMap.begin(), |
63 | 9 | SubsectionFragmentMap.end(), |
64 | 9 | std::make_pair(Subsection, (MCFragment *)nullptr)); |
65 | 9 | bool ExactMatch = false; |
66 | 9 | if (MI != SubsectionFragmentMap.end()9 ) { |
67 | 4 | ExactMatch = MI->first == Subsection; |
68 | 4 | if (ExactMatch) |
69 | 1 | ++MI; |
70 | 4 | } |
71 | 9 | iterator IP; |
72 | 9 | if (MI == SubsectionFragmentMap.end()) |
73 | 4 | IP = end(); |
74 | 9 | else |
75 | 5 | IP = MI->second->getIterator(); |
76 | 9 | if (!ExactMatch && 9 Subsection != 07 ) { |
77 | 5 | // The GNU as documentation claims that subsections have an alignment of 4, |
78 | 5 | // although this appears not to be the case. |
79 | 5 | MCFragment *F = new MCDataFragment(); |
80 | 5 | SubsectionFragmentMap.insert(MI, std::make_pair(Subsection, F)); |
81 | 5 | getFragmentList().insert(IP, F); |
82 | 5 | F->setParent(this); |
83 | 5 | } |
84 | 530k | |
85 | 530k | return IP; |
86 | 530k | } |
87 | | |
88 | | #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) |
89 | | LLVM_DUMP_METHOD void MCSection::dump() const { |
90 | | raw_ostream &OS = errs(); |
91 | | |
92 | | OS << "<MCSection"; |
93 | | OS << " Fragments:[\n "; |
94 | | for (auto it = begin(), ie = end(); it != ie; ++it) { |
95 | | if (it != begin()) |
96 | | OS << ",\n "; |
97 | | it->dump(); |
98 | | } |
99 | | OS << "]>"; |
100 | | } |
101 | | #endif |