commit cceae7feda8e33194d1a6c5963bd4114bb8d2b36
author Peter Collingbourne <peter@pcc.me.uk> Tue May 31 23:01:54 2016 +0000
committer Peter Collingbourne <peter@pcc.me.uk> Tue May 31 23:01:54 2016 +0000
tree d7f155b4ea8004651b1aadf412465b0d3950f9e6
parent 81fbadb63f4d28f62950e2e2c4967f1429b3ca55

Add support for metadata attachments for global variables.

This patch adds an IR, assembly and bitcode representation for metadata
attachments for globals. Future patches will port existing features to use
these new attachments.

Differential Revision: http://reviews.llvm.org/D20074

llvm-svn: 271348

llvm/lib/IR/Globals.cpp

diff --git a/llvm/lib/IR/Globals.cpp b/llvm/lib/IR/Globals.cpp
index 3bf3cc2..d151b9c 100644
--- a/llvm/lib/IR/Globals.cpp
+++ b/llvm/lib/IR/Globals.cpp
@@ -81,13 +81,13 @@
 
 unsigned GlobalObject::getGlobalObjectSubClassData() const {
   unsigned ValueData = getGlobalValueSubClassData();
-  return ValueData >> AlignmentBits;
+  return ValueData >> GlobalObjectBits;
 }
 
 void GlobalObject::setGlobalObjectSubClassData(unsigned Val) {
   unsigned OldData = getGlobalValueSubClassData();
-  setGlobalValueSubClassData((OldData & AlignmentMask) |
-                             (Val << AlignmentBits));
+  setGlobalValueSubClassData((OldData & GlobalObjectMask) |
+                             (Val << GlobalObjectBits));
   assert(getGlobalObjectSubClassData() == Val && "representation error");
 }
 
@@ -301,6 +301,10 @@
   }
 }
 
+void GlobalVariable::dropAllReferences() {
+  User::dropAllReferences();
+  clearMetadata();
+}
 
 //===----------------------------------------------------------------------===//
 // GlobalIndirectSymbol Implementation