Add Constant Hoisting Pass

Retry commit r200022 with a fix for the build bot errors. Constant expressions
have (unlike instructions) module scope use lists and therefore may have users
in different functions. The fix is to simply ignore these out-of-function uses.

llvm-svn: 200034

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/Scalar/Scalar.cpp b/llvm/lib/Transforms/Scalar/Scalar.cpp
index 6983d06b681..f774874cb47 100644
--- a/llvm/lib/Transforms/Scalar/Scalar.cpp
+++ b/llvm/lib/Transforms/Scalar/Scalar.cpp
@@ -30,6 +30,7 @@ void llvm::initializeScalarOpts(PassRegistry &Registry) {
   initializeADCEPass(Registry);
   initializeSampleProfileLoaderPass(Registry);
   initializeCodeGenPreparePass(Registry);
+  initializeConstantHoistingPass(Registry);
   initializeConstantPropagationPass(Registry);
   initializeCorrelatedValuePropagationPass(Registry);
   initializeDCEPass(Registry);