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[SIL] Refactor splitBasicBlock() into splitBasicBlock and splitBasicBlockAndBranch

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This API is more explicit and avoids relying on passing around empty SILLocation.
(No functional change.)

Swift SVN r7988
This commit is contained in:
Anna Zaks
2013-09-06 17:46:12 +00:00
parent f295c484b8
commit 4d7de376bb
4 changed files with 32 additions and 20 deletions
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20
include/swift/SIL/SILBasicBlock.h
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@@ -92,13 +92,19 @@ public:
return const_cast<SILBasicBlock*>(this)->getTerminator();
}
/// splitBasicBlock - This splits a basic block into two at the specified
/// instruction. Note that all instructions BEFORE the specified iterator
/// stay as part of the original basic block. If CreateBranch is true, an
/// unconditional branch is added from the old basic block to the new basic
/// block, otherwise the old basic block is left without a terminator.
SILBasicBlock *splitBasicBlock(iterator I, bool CreateBranch = true,
SILLocation BranchLoc = SILLocation());
/// \brief Splits a basic block into two at the specified instruction.
///
/// Note that all the instructions BEFORE the specified iterator
/// stay as part of the original basic block. The old basic block is left
/// without a terminator.
SILBasicBlock *splitBasicBlock(iterator I);
/// \brief Splits a basic block into two at the specified instruction and
/// inserts an unconditional branch from the old basic block to the new basic
/// block.
///
/// \sa splitBasicBlock
SILBasicBlock *splitBasicBlockAndBranch(iterator I, SILLocation BranchLoc);
//===--------------------------------------------------------------------===//
// SILBasicBlock Argument List Inspection and Manipulation