[llvm-commits] [llvm] r154811 - /llvm/trunk/include/llvm/Support/MDBuilder.h

[Duncan Sands]

Author: baldrick
Date: Mon Apr 16 08:21:26 2012
New Revision: 154811

URL: http://llvm.org/viewvc/llvm-project?rev=154811&view=rev
Log:
Add convenience methods to MDBuilder for attaching metadata to instructions,
and retrieving it from instructions.  I don't have a use for this but is seems
logical for it to exist.  While there, remove some 'const' markings from methods
which are in fact 'const' in practice, but aren't logically 'const'.

Modified:
    llvm/trunk/include/llvm/Support/MDBuilder.h

Modified: llvm/trunk/include/llvm/Support/MDBuilder.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/MDBuilder.h?rev=154811&r1=154810&r2=154811&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/MDBuilder.h (original)
+++ llvm/trunk/include/llvm/Support/MDBuilder.h Mon Apr 16 08:21:26 2012
@@ -17,6 +17,7 @@
 
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
+#include "llvm/Instructions.h"
 #include "llvm/LLVMContext.h"
 #include "llvm/Metadata.h"
 #include "llvm/ADT/APInt.h"
@@ -30,7 +31,7 @@
     MDBuilder(LLVMContext &context) : Context(context) {}
 
     /// CreateString - Return the given string as metadata.
-    MDString *CreateString(StringRef Str) const {
+    MDString *CreateString(StringRef Str) {
       return MDString::get(Context, Str);
     }
 
@@ -39,7 +40,7 @@
     //===------------------------------------------------------------------===//
 
     /// CreateRange - Return metadata describing the range [Lo, Hi).
-    MDNode *CreateRange(const APInt &Lo, const APInt &Hi) const {
+    MDNode *CreateRange(const APInt &Lo, const APInt &Hi) {
       assert(Lo.getBitWidth() == Hi.getBitWidth() && "Mismatched bitwidths!");
       // If the range is everything then it is useless.
       if (Hi == Lo)
@@ -51,6 +52,16 @@
       return MDNode::get(Context, Range);
     }
 
+    /// GetRangeMetadata - Get range metadata attached to an instruction.
+    MDNode *GetRangeMetadata(Instruction *I) const {
+      return I->getMetadata(LLVMContext::MD_range);
+    }
+
+    /// SetRangeMetadata - Attach range metadata to an instruction.
+    void SetRangeMetadata(Instruction *I, MDNode *RangeTag) {
+      I->setMetadata(LLVMContext::MD_range, RangeTag);
+    }
+
 
     //===------------------------------------------------------------------===//
     // TBAA metadata.
@@ -59,7 +70,7 @@
     /// CreateAnonymousTBAARoot - Return metadata appropriate for a TBAA root
     /// node.  Each returned node is distinct from all other metadata and will
     /// never be identified (uniqued) with anything else.
-    MDNode *CreateAnonymousTBAARoot() const {
+    MDNode *CreateAnonymousTBAARoot() {
       // To ensure uniqueness the root node is self-referential.
       MDNode *Dummy = MDNode::getTemporary(Context, ArrayRef<Value*>());
       MDNode *Root = MDNode::get(Context, Dummy);
@@ -77,14 +88,14 @@
     /// CreateTBAARoot - Return metadata appropriate for a TBAA root node with
     /// the given name.  This may be identified (uniqued) with other roots with
     /// the same name.
-    MDNode *CreateTBAARoot(StringRef Name) const {
+    MDNode *CreateTBAARoot(StringRef Name) {
       return MDNode::get(Context, CreateString(Name));
     }
 
     /// CreateTBAANode - Return metadata for a non-root TBAA node with the given
     /// name, parent in the TBAA tree, and value for 'pointsToConstantMemory'.
     MDNode *CreateTBAANode(StringRef Name, MDNode *Parent,
-                           bool isConstant = false) const {
+                           bool isConstant = false) {
       if (isConstant) {
         Constant *Flags = ConstantInt::get(Type::getInt64Ty(Context), 1);
         Value *Ops[3] = { CreateString(Name), Parent, Flags };
@@ -94,6 +105,17 @@
         return MDNode::get(Context, Ops);
       }
     }
+
+    /// GetTBAAMetadata - Get tbaa metadata attached to an instruction.
+    MDNode *GetTBAAMetadata(Instruction *I) const {
+      return I->getMetadata(LLVMContext::MD_tbaa);
+    }
+
+    /// SetTBAAMetadata - Attach tbaa metadata to an instruction.
+    void SetTBAAMetadata(Instruction *I, MDNode *TBAATag) {
+      I->setMetadata(LLVMContext::MD_tbaa, TBAATag);
+    }
+
   };
 
 } // end namespace llvm