[PATCH] Add two helper functions: isAtLeastAcquire, isAtLeastRelease

[Robin Morisset]

Add a comment to the body of the two functions, based on the comment of jfb

http://reviews.llvm.org/D4844

Files:
  include/llvm/IR/Instructions.h

Index: include/llvm/IR/Instructions.h
===================================================================
--- include/llvm/IR/Instructions.h
+++ include/llvm/IR/Instructions.h
@@ -236,6 +236,12 @@
   bool isUnordered() const {
     return getOrdering() <= Unordered && !isVolatile();
   }
+  bool isAtLeastAcquire() const {
+    // We do not have to check for AcquireRelease as this is a load and
+    // it is not a valid ordering for loads.
+    return (getOrdering() == Acquire
+        || getOrdering() == SequentiallyConsistent);
+  }
 
   Value *getPointerOperand() { return getOperand(0); }
   const Value *getPointerOperand() const { return getOperand(0); }
@@ -356,6 +362,12 @@
   bool isUnordered() const {
     return getOrdering() <= Unordered && !isVolatile();
   }
+  bool isAtLeastRelease() const {
+    // We do not have to check for AcquireRelease as this is a store and
+    // it is not a valid ordering for stores.
+    return (getOrdering() == Release
+        || getOrdering() == SequentiallyConsistent);
+  }
 
   Value *getValueOperand() { return getOperand(0); }
   const Value *getValueOperand() const { return getOperand(0); }
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