add a GEP helper function

llvm-svn: 36515

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/VMCore/Instructions.cpp b/llvm/lib/VMCore/Instructions.cpp
index 2bd350080e3..4c792a56afb 100644
--- a/llvm/lib/VMCore/Instructions.cpp
+++ b/llvm/lib/VMCore/Instructions.cpp
@@ -1043,6 +1043,17 @@ bool GetElementPtrInst::hasAllZeroIndices() const {
   return true;
 }
 
+/// hasAllConstantIndices - Return true if all of the indices of this GEP are
+/// constant integers.  If so, the result pointer and the first operand have
+/// a constant offset between them.
+bool GetElementPtrInst::hasAllConstantIndices() const {
+  for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
+    if (!isa<ConstantInt>(getOperand(i)))
+      return false;
+  }
+  return true;
+}
+
 
 //===----------------------------------------------------------------------===//
 //                           ExtractElementInst Implementation