37 #define DEBUG_TYPE "branch-relaxation"
43 #define BRANCH_RELAX_NAME "Branch relaxation pass"
269 /// an unconditional branch.  Update data structures and renumber blocks to
289   // Add an unconditional branch from OrigBB to NewBB.  in splitBlockBeforeInstr()
290   // Note the new unconditional branch is not being recorded.  in splitBlockBeforeInstr()
302   // Cleanup potential unconditional branch to successor block.  in splitBlockBeforeInstr()
344   LLVM_DEBUG(dbgs() << "Out of range branch to destination "  in isBlockInRange()
353 /// fixupConditionalBranch - Fix up a conditional branch whose destination is
355 /// conditional branch + an unconditional branch to the destination.
401   // branch", which unconditionally branches to the branch destination. Place  in fixupConditionalBranch()
402   // the trampoline branch at the end of the function and retarget the  in fixupConditionalBranch()
403   // conditional branch to the trampoline.  in fixupConditionalBranch()
426       // Replace branch in the current (MBB) block.  in fixupConditionalBranch()
443   // Add an unconditional branch to the destination and invert the branch  in fixupConditionalBranch()
454       // Last MI in the BB is an unconditional branch. We can simply invert the  in fixupConditionalBranch()
491     // Insert a new conditional branch and a new unconditional branch.  in fixupConditionalBranch()
497   // Branch cond can't be inverted.  in fixupConditionalBranch()
499   LLVM_DEBUG(dbgs() << "  The branch condition can't be inverted. "  in fixupConditionalBranch()
505   // This is the block with cond. branch and the distance to TBB is too long.  in fixupConditionalBranch()
530   // Replace branch in the current (MBB) block.  in fixupConditionalBranch()
556   // If this was an expanded conditional branch, there is already a single  in fixupUnconditionalBranch()
557   // unconditional branch in a block.  in fixupUnconditionalBranch()
608       // Retarget the unconditional branch to the trampoline block.  in fixupUnconditionalBranch()
620     // restore blocks are just duplicated for each far branch.  in fixupUnconditionalBranch()
623     // Fall through only if PrevBB has no unconditional branch as one of its  in fixupUnconditionalBranch()
667     // Expand the unconditional branch first if necessary. If there is a  in relaxBranchInstructions()
668     // conditional branch, this will end up changing the branch destination of  in relaxBranchInstructions()
669     // it to be over the newly inserted indirect branch block, which may avoid  in relaxBranchInstructions()
670     // the need to try expanding the conditional branch first, saving an extra  in relaxBranchInstructions()
673       // Unconditional branch destination might be unanalyzable, assume these  in relaxBranchInstructions()