diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/NewGVN.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/NewGVN.cpp b/llvm/lib/Transforms/Scalar/NewGVN.cpp index e620ae9c557..ceb53502f98 100644 --- a/llvm/lib/Transforms/Scalar/NewGVN.cpp +++ b/llvm/lib/Transforms/Scalar/NewGVN.cpp @@ -127,6 +127,10 @@ DEBUG_COUNTER(PHIOfOpsCounter, "newgvn-phi", static cl::opt<bool> EnableStoreRefinement("enable-store-refinement", cl::init(false), cl::Hidden); +/// Currently, the generation "phi of ops" can result in correctness issues. +static cl::opt<bool> EnablePhiOfOps("enable-phi-of-ops", cl::init(false), + cl::Hidden); + //===----------------------------------------------------------------------===// // GVN Pass //===----------------------------------------------------------------------===// @@ -2442,6 +2446,8 @@ void NewGVN::addPhiOfOps(PHINode *Op, BasicBlock *BB, } static bool okayForPHIOfOps(const Instruction *I) { + if (!EnablePhiOfOps) + return false; return isa<BinaryOperator>(I) || isa<SelectInst>(I) || isa<CmpInst>(I) || isa<LoadInst>(I); } |
