[llvm] Decompose gep of complex type struct to its element type (PR #107848)

[Matt Arsenault via llvm-commits]

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@@ -1078,6 +1078,8 @@ class GetElementPtrInst : public Instruction {
   /// a constant offset between them.
   bool hasAllConstantIndices() const;
 
+  bool hasAllZeroIndicesExceptLast() const;
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arsenm wrote:

Needs doc string 

https://github.com/llvm/llvm-project/pull/107848