diff options
Diffstat (limited to 'llvm/lib/Transforms/Scalar/GVN.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/GVN.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp index 7486d5f0df5..185b2238463 100644 --- a/llvm/lib/Transforms/Scalar/GVN.cpp +++ b/llvm/lib/Transforms/Scalar/GVN.cpp @@ -105,6 +105,10 @@ static cl::opt<uint32_t> MaxRecurseDepth("gvn-max-recurse-depth", cl::Hidden, cl::init(1000), cl::ZeroOrMore, cl::desc("Max recurse depth in GVN (default = 1000)")); +static cl::opt<uint32_t> MaxNumDeps( + "gvn-max-num-deps", cl::Hidden, cl::init(100), cl::ZeroOrMore, + cl::desc("Max number of dependences to attempt Load PRE (default = 100)")); + struct llvm::GVN::Expression { uint32_t opcode; Type *type; @@ -1311,7 +1315,7 @@ bool GVN::processNonLocalLoad(LoadInst *LI) { // dependencies, this load isn't worth worrying about. Optimizing // it will be too expensive. unsigned NumDeps = Deps.size(); - if (NumDeps > 100) + if (NumDeps > MaxNumDeps) return false; // If we had a phi translation failure, we'll have a single entry which is a |
