From 6284b54ccd8b276cd46673d7df9fb1125c51a352 Mon Sep 17 00:00:00 2001 From: Sebastian Pop Date: Mon, 10 Sep 2018 15:07:59 +0000 Subject: [PATCH] add flag instead of using a constant [NFC] llvm-svn: 341837 --- llvm/lib/Transforms/Scalar/GVN.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp index 7486d5f..185b223 100644 --- a/llvm/lib/Transforms/Scalar/GVN.cpp +++ b/llvm/lib/Transforms/Scalar/GVN.cpp @@ -105,6 +105,10 @@ static cl::opt MaxRecurseDepth("gvn-max-recurse-depth", cl::Hidden, cl::init(1000), cl::ZeroOrMore, cl::desc("Max recurse depth in GVN (default = 1000)")); +static cl::opt 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 -- 2.7.4