[ModRefInfo] Make enum ModRefInfo an enum class [NFC].

Summary:
Make enum ModRefInfo an enum class. Changes to ModRefInfo values should
be done using inline wrappers.
This should prevent future bit-wise opearations from being added, which can be more error-prone.

Reviewers: sanjoy, dberlin, hfinkel, george.burgess.iv

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D40933

llvm-svn: 320107

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/lib/Analysis/ScopedNoAliasAA.cpp b/llvm/lib/Analysis/ScopedNoAliasAA.cpp
index b97b08ad074..f12275aff38 100644
--- a/llvm/lib/Analysis/ScopedNoAliasAA.cpp
+++ b/llvm/lib/Analysis/ScopedNoAliasAA.cpp
@@ -102,12 +102,12 @@ ModRefInfo ScopedNoAliasAAResult::getModRefInfo(ImmutableCallSite CS,
 
   if (!mayAliasInScopes(Loc.AATags.Scope, CS.getInstruction()->getMetadata(
                                               LLVMContext::MD_noalias)))
-    return MRI_NoModRef;
+    return ModRefInfo::NoModRef;
 
   if (!mayAliasInScopes(
           CS.getInstruction()->getMetadata(LLVMContext::MD_alias_scope),
           Loc.AATags.NoAlias))
-    return MRI_NoModRef;
+    return ModRefInfo::NoModRef;
 
   return AAResultBase::getModRefInfo(CS, Loc);
 }
@@ -120,12 +120,12 @@ ModRefInfo ScopedNoAliasAAResult::getModRefInfo(ImmutableCallSite CS1,
   if (!mayAliasInScopes(
           CS1.getInstruction()->getMetadata(LLVMContext::MD_alias_scope),
           CS2.getInstruction()->getMetadata(LLVMContext::MD_noalias)))
-    return MRI_NoModRef;
+    return ModRefInfo::NoModRef;
 
   if (!mayAliasInScopes(
           CS2.getInstruction()->getMetadata(LLVMContext::MD_alias_scope),
           CS1.getInstruction()->getMetadata(LLVMContext::MD_noalias)))
-    return MRI_NoModRef;
+    return ModRefInfo::NoModRef;
 
   return AAResultBase::getModRefInfo(CS1, CS2);
 }