Add an option to turn off the expensive GVN load PRE part of GVN.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153902 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/lto/LTOCodeGenerator.cpp b/tools/lto/LTOCodeGenerator.cpp
index 1d2631e..f0640c2 100644
--- a/tools/lto/LTOCodeGenerator.cpp
+++ b/tools/lto/LTOCodeGenerator.cpp
@@ -49,6 +49,9 @@
static cl::opt<bool> DisableInline("disable-inlining",
cl::desc("Do not run the inliner pass"));
+static cl::opt<bool> DisableGVNLoadPRE("disable-gvn-loadpre",
+ cl::desc("Do not run the GVN load PRE pass"));
+
const char* LTOCodeGenerator::getVersionString() {
#ifdef LLVM_VERSION_INFO
return PACKAGE_NAME " version " PACKAGE_VERSION ", " LLVM_VERSION_INFO;
@@ -353,7 +356,8 @@
passes.add(new TargetData(*_target->getTargetData()));
PassManagerBuilder().populateLTOPassManager(passes, /*Internalize=*/ false,
- !DisableInline);
+ !DisableInline,
+ DisableGVNLoadPRE);
// Make sure everything is still good.
passes.add(createVerifierPass());