[llvm] r238749 - Add isConstant argument to MDBuilder::createTBAAStructTagNode

[Artur Pilipenko]

Author: apilipenko
Date: Mon Jun  1 09:53:55 2015
New Revision: 238749

URL: http://llvm.org/viewvc/llvm-project?rev=238749&view=rev
Log:
Add isConstant argument to MDBuilder::createTBAAStructTagNode

According to the TBAA description struct-path tag node can have an optional IsConstant field. Add corresponding argument to MDBuilder::createTBAAStructTagNode.

Reviewed By: hfinkel

Differential Revision: http://reviews.llvm.org/D10160

Modified:
    llvm/trunk/include/llvm/IR/MDBuilder.h
    llvm/trunk/lib/IR/MDBuilder.cpp

Modified: llvm/trunk/include/llvm/IR/MDBuilder.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/MDBuilder.h?rev=238749&r1=238748&r2=238749&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/MDBuilder.h (original)
+++ llvm/trunk/include/llvm/IR/MDBuilder.h Mon Jun  1 09:53:55 2015
@@ -153,7 +153,7 @@ public:
   /// \brief Return metadata for a TBAA tag node with the given
   /// base type, access type and offset relative to the base type.
   MDNode *createTBAAStructTagNode(MDNode *BaseType, MDNode *AccessType,
-                                  uint64_t Offset);
+                                  uint64_t Offset, bool IsConstant = false);
 };
 
 } // end namespace llvm

Modified: llvm/trunk/lib/IR/MDBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/MDBuilder.cpp?rev=238749&r1=238748&r2=238749&view=diff
==============================================================================
--- llvm/trunk/lib/IR/MDBuilder.cpp (original)
+++ llvm/trunk/lib/IR/MDBuilder.cpp Mon Jun  1 09:53:55 2015
@@ -168,9 +168,16 @@ MDNode *MDBuilder::createTBAAScalarTypeN
 /// \brief Return metadata for a TBAA tag node with the given
 /// base type, access type and offset relative to the base type.
 MDNode *MDBuilder::createTBAAStructTagNode(MDNode *BaseType, MDNode *AccessType,
-                                           uint64_t Offset) {
+                                           uint64_t Offset, bool IsConstant) {
   Type *Int64 = Type::getInt64Ty(Context);
-  Metadata *Ops[3] = {BaseType, AccessType,
-                      createConstant(ConstantInt::get(Int64, Offset))};
-  return MDNode::get(Context, Ops);
+  if (IsConstant) {
+    Metadata *Ops[4] = {BaseType, AccessType,
+                        createConstant(ConstantInt::get(Int64, Offset)),
+                        createConstant(ConstantInt::get(Int64, 1))};
+    return MDNode::get(Context, Ops);
+  } else {
+    Metadata *Ops[3] = {BaseType, AccessType,
+                        createConstant(ConstantInt::get(Int64, Offset))};
+    return MDNode::get(Context, Ops);
+  }
 }