IR: Change the gep_type_iterator API to avoid always exposing the "current" type.

Instead, expose whether the current type is an array or a struct, if an array
what the upper bound is, and if a struct the struct type itself. This is
in preparation for a later change which will make PointerType derive from
Type rather than SequentialType.

Differential Revision: https://reviews.llvm.org/D26594

llvm-svn: 288458

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/IR/Operator.cpp b/llvm/lib/IR/Operator.cpp
index 8a94053a72c..2fba24d99b3 100644
--- a/llvm/lib/IR/Operator.cpp
+++ b/llvm/lib/IR/Operator.cpp
@@ -33,7 +33,7 @@ bool GEPOperator::accumulateConstantOffset(const DataLayout &DL,
       continue;
 
     // Handle a struct index, which adds its field offset to the pointer.
-    if (StructType *STy = dyn_cast<StructType>(*GTI)) {
+    if (StructType *STy = GTI.getStructTypeOrNull()) {
       unsigned ElementIdx = OpC->getZExtValue();
       const StructLayout *SL = DL.getStructLayout(STy);
       Offset += APInt(Offset.getBitWidth(), SL->getElementOffset(ElementIdx));