diff options
| -rw-r--r-- | lib/Transforms/Scalar/LoopIndexSplit.cpp | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/lib/Transforms/Scalar/LoopIndexSplit.cpp b/lib/Transforms/Scalar/LoopIndexSplit.cpp index 3a04665..0f55a91 100644 --- a/lib/Transforms/Scalar/LoopIndexSplit.cpp +++ b/lib/Transforms/Scalar/LoopIndexSplit.cpp @@ -328,14 +328,24 @@ void LoopIndexSplit::findLoopConditionals() { if (!CI) return; - // FIXME + // FIXME + if (CI->getPredicate() == ICmpInst::ICMP_EQ + || CI->getPredicate() == ICmpInst::ICMP_NE) + return; + if (CI->getPredicate() == ICmpInst::ICMP_SGT || CI->getPredicate() == ICmpInst::ICMP_UGT || CI->getPredicate() == ICmpInst::ICMP_SGE - || CI->getPredicate() == ICmpInst::ICMP_UGE - || CI->getPredicate() == ICmpInst::ICMP_EQ - || CI->getPredicate() == ICmpInst::ICMP_NE) - return; + || CI->getPredicate() == ICmpInst::ICMP_UGE) { + + BasicBlock *FirstSuccessor = BR->getSuccessor(0); + // splitLoop() is expecting LT/LE as exit condition predicate. + // Swap operands here if possible to meet this requirement. + if (!L->contains(FirstSuccessor)) + CI->swapOperands(); + else + return; + } ExitCondition = CI; |