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| author | Chandler Carruth <chandlerc@gmail.com> | 2011-10-17 01:11:57 +0000 |
|---|---|---|
| committer | Chandler Carruth <chandlerc@gmail.com> | 2011-10-17 01:11:57 +0000 |
| commit | 602650c98822371d4a34b00353ec71051621b7fb (patch) | |
| tree | d6b4d7c82ce7ba5d787d6f22a6c5c2b339793663 /include | |
| parent | 1416dc29d8573e58c8b2d7fe0715f3e289d03ab8 (diff) | |
| download | llvm-602650c98822371d4a34b00353ec71051621b7fb.tar.gz llvm-602650c98822371d4a34b00353ec71051621b7fb.tar.bz2 llvm-602650c98822371d4a34b00353ec71051621b7fb.tar.xz | |
Add a routine to swap branch instruction operands, and update any
profile metadata at the same time. Use it to preserve metadata attached
to a branch when re-writing it in InstCombine.
Add metadata to the canonicalize_branch InstCombine test, and check that
it is tranformed correctly.
Reviewed by Nick Lewycky!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142168 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/Instructions.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/llvm/Instructions.h b/include/llvm/Instructions.h index 23e3e7e0f7..3faab35bf6 100644 --- a/include/llvm/Instructions.h +++ b/include/llvm/Instructions.h @@ -2367,6 +2367,13 @@ public: *(&Op<-1>() - idx) = (Value*)NewSucc; } + /// \brief Swap the successors of this branch instruction. + /// + /// Swaps the successors of the branch instruction. This also swaps any + /// branch weight metadata associated with the instruction so that it + /// continues to map correctly to each operand. + void swapSuccessors(); + // Methods for support type inquiry through isa, cast, and dyn_cast: static inline bool classof(const BranchInst *) { return true; } static inline bool classof(const Instruction *I) { |