commit b6e8fe3dacb49dfe4c67dbc3cc40d59cd902f519
author Philip Reames <listmail@philipreames.com> Tue Nov 17 00:15:09 2015 +0000
committer Philip Reames <listmail@philipreames.com> Tue Nov 17 00:15:09 2015 +0000
tree 41f5a4c88e7fb2f0ce74b8a7989ec21657233cf4
parent dbd2d32892e83d270b6fedc54ea301f75e8ae0ac

[PRE] Preserve !invariant.load metadata

Spoted via inspection.  Test case included.

llvm-svn: 253275

llvm/lib/Transforms/Scalar/GVN.cpp

diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp
index e2822e3..06faa2d 100644
--- a/llvm/lib/Transforms/Scalar/GVN.cpp
+++ b/llvm/lib/Transforms/Scalar/GVN.cpp
@@ -1669,6 +1669,8 @@
     if (Tags)
       NewLoad->setAAMetadata(Tags);
 
+    if (auto *MD = LI->getMetadata(LLVMContext::MD_invariant_load))
+      NewLoad->setMetadata(LLVMContext::MD_invariant_load, MD);
     if (auto *InvGroupMD = LI->getMetadata(LLVMContext::MD_invariant_group))
       NewLoad->setMetadata(LLVMContext::MD_invariant_group, InvGroupMD);