When we hoist two loads above an if, we can preserve the nonnull metadata. We could also do the same for sinking them, but we appear to not handle metadata at all in that case.
Thanks to Hal for the review.
Differential Revision: http://reviews.llvm.org/D5910
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220392
91177308-0d34-0410-b5e6-
96231b3b80d8
LLVMContext::MD_tbaa,
LLVMContext::MD_range,
LLVMContext::MD_fpmath,
- LLVMContext::MD_invariant_load
+ LLVMContext::MD_invariant_load,
+ LLVMContext::MD_nonnull
};
combineMetadata(I1, I2, KnownIDs);
I2->eraseFromParent();
if (!I2->use_empty())
I2->replaceAllUsesWith(I1);
I1->intersectOptionalDataWith(I2);
+ // TODO: Use combineMetadata here to preserve what metadata we can
+ // (analogous to the hoisting case above).
I2->eraseFromParent();
if (UpdateRE1)