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MC CFG: Split MCBasicBlocks to mirror atom splitting.

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When an MCTextAtom is split, all MCBasicBlocks backed by it are
automatically split, with a fallthrough between both blocks, and
the successors moved to the second block.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188881 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ahmed Bougacha
2013-08-21 07:28:24 +00:00
parent 46d353f8e8
commit aeb2bbcb6d
5 changed files with 65 additions and 2 deletions
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15
include/llvm/MC/MCModule.h
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@ -56,6 +56,21 @@ class MCModule {
void map(MCAtom *NewAtom);
/// @}
/// \name Basic block tracking
/// @{
typedef std::vector<MCBasicBlock*> BBsByAtomTy;
BBsByAtomTy BBsByAtom;
// For access to basic block > atom tracking.
friend class MCBasicBlock;
friend class MCTextAtom;
/// \brief Keep track of \p BBBackedByAtom as being backed by \p Atom.
/// This is used to update succs/preds when \p Atom is split.
void trackBBForAtom(const MCTextAtom *Atom, MCBasicBlock *BBBackedByAtom);
void splitBasicBlocksForAtom(const MCTextAtom *TA, const MCTextAtom *NewTA);
/// @}
/// \name Function tracking
/// @{
typedef std::vector<MCFunction*> FunctionListTy;