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author | Kevin Enderby <enderby@apple.com> | 2010-05-17 23:08:19 +0000 |
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committer | Kevin Enderby <enderby@apple.com> | 2010-05-17 23:08:19 +0000 |
commit | ebe7fcd041e1e9c3a0c535b26d8cdb45805bbeb8 (patch) | |
tree | 24b43a97e9c13fffbfa6bc0cbb970686a513694b /include | |
parent | c6177a4531a5d7e2207a3184cc8a4f1792073a7d (diff) | |
download | external_llvm-ebe7fcd041e1e9c3a0c535b26d8cdb45805bbeb8.zip external_llvm-ebe7fcd041e1e9c3a0c535b26d8cdb45805bbeb8.tar.gz external_llvm-ebe7fcd041e1e9c3a0c535b26d8cdb45805bbeb8.tar.bz2 |
Added support in MC for Directional Local Labels.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103989 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
-rw-r--r-- | include/llvm/MC/MCContext.h | 18 | ||||
-rw-r--r-- | include/llvm/MC/MCLabel.h | 56 |
2 files changed, 74 insertions, 0 deletions
diff --git a/include/llvm/MC/MCContext.h b/include/llvm/MC/MCContext.h index 50ae9cc..03b5fb0 100644 --- a/include/llvm/MC/MCContext.h +++ b/include/llvm/MC/MCContext.h @@ -20,6 +20,7 @@ namespace llvm { class MCExpr; class MCSection; class MCSymbol; + class MCLabel; class StringRef; class Twine; class MCSectionMachO; @@ -43,6 +44,15 @@ namespace llvm { /// NextUniqueID - The next ID to dole out to an unnamed assembler temporary /// symbol. unsigned NextUniqueID; + + /// Instances of directional local labels. + DenseMap<unsigned, MCLabel *> Instances; + /// NextInstance() creates the next instance of the directional local label + /// for the LocalLabelVal and adds it to the map if needed. + unsigned NextInstance(int64_t LocalLabelVal); + /// GetInstance() gets the current instance of the directional local label + /// for the LocalLabelVal and adds it to the map if needed. + unsigned GetInstance(int64_t LocalLabelVal); /// Allocator - Allocator object used for creating machine code objects. /// @@ -64,6 +74,14 @@ namespace llvm { /// with a unique but unspecified name. MCSymbol *CreateTempSymbol(); + /// CreateDirectionalLocalSymbol - Create the defintion of a directional + /// local symbol for numbered label (used for "1:" defintions). + MCSymbol *CreateDirectionalLocalSymbol(int64_t LocalLabelVal); + + /// GetDirectionalLocalSymbol - Create and return a directional local + /// symbol for numbered label (used for "1b" or 1f" references). + MCSymbol *GetDirectionalLocalSymbol(int64_t LocalLabelVal, int bORf); + /// GetOrCreateSymbol - Lookup the symbol inside with the specified /// @p Name. If it exists, return it. If not, create a forward /// reference and return it. diff --git a/include/llvm/MC/MCLabel.h b/include/llvm/MC/MCLabel.h new file mode 100644 index 0000000..727520d --- /dev/null +++ b/include/llvm/MC/MCLabel.h @@ -0,0 +1,56 @@ +//===- MCLabel.h - Machine Code Directional Local Labels --------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains the declaration of the MCLabel class. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_MC_MCLABEL_H +#define LLVM_MC_MCLABEL_H + +namespace llvm { + class MCContext; + class raw_ostream; + + /// MCLabel - Instances of this class represent a label name in the MC file, + /// and MCLabel are created and unique'd by the MCContext class. MCLabel + /// should only be constructed for valid instances in the object file. + class MCLabel { + // Instance - the instance number of this Directional Local Label + unsigned Instance; + + private: // MCContext creates and uniques these. + friend class MCContext; + MCLabel(unsigned instance) + : Instance(instance) {} + + MCLabel(const MCLabel&); // DO NOT IMPLEMENT + void operator=(const MCLabel&); // DO NOT IMPLEMENT + public: + /// getInstance - Get the current instance of this Directional Local Label. + unsigned getInstance() const { return Instance; } + + /// incInstance - Increment the current instance of this Directional Local + /// Label. + unsigned incInstance() { return ++Instance; } + + /// print - Print the value to the stream \arg OS. + void print(raw_ostream &OS) const; + + /// dump - Print the value to stderr. + void dump() const; + }; + + inline raw_ostream &operator<<(raw_ostream &OS, const MCLabel &Label) { + Label.print(OS); + return OS; + } +} // end namespace llvm + +#endif |