llvm-svn: 37485

Evan, please check that this is in fact correct.

llvm-svn: 37471

llvm-svn: 37467

If a unconditional branch is added to branch to the false path during ifcvt, the predicated block cannot be iteratively ifcvted.

llvm-svn: 37456

llvm-svn: 37451

llvm-svn: 37449

llvm-svn: 37444

llvm-svn: 37441

llvm-svn: 37440

llvm-svn: 37433

If the predicated block requires an early exit, end the block there and add a unconditional branch to false block. AnalyzeBranch() does not understand early exits.

llvm-svn: 37430

llvm-svn: 37429

llvm-svn: 37420

Let IfConverter loose. Allow more aggressive subsumptions; reorder basic blocks to expose more ifcvt opportunities; code clean up and fixes.

llvm-svn: 37409

llvm-svn: 37387

Ifcvt triangle: don't ifcvt 'true' BB if it has other predecessors; don't merge 'false' BB if it has other predecessors.

llvm-svn: 37382

Remove a bogus check. Even terminators in a ifcvt need to be predicated. Unconditional branches can usually be converted to conditional ones.

llvm-svn: 37380

llvm-svn: 37379

llvm-svn: 37374

llvm-svn: 37365

llvm-svn: 37353

If there is an empty block between a source and its successor block, it still requires a unconditional branch.

llvm-svn: 37344

llvm-svn: 37328

llvm-svn: 37309

llvm-svn: 37270

llvm-svn: 37237

llvm-svn: 37236

llvm-svn: 37231

llvm-svn: 37227

llvm-svn: 37200

llvm-svn: 37195

llvm-svn: 37126

llvm-svn: 37121

llvm-svn: 37097

llvm-svn: 37092