[clang] [llvm] [VectorCombine] Trim low end of loads used in shufflevector rebroadcasts. (PR #149093)

[Matt Arsenault via llvm-commits]

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@@ -4789,8 +4794,13 @@ bool VectorCombine::shrinkLoadForShuffles(Instruction &I) {
         return false;
 
       // Create new load of smaller vector.
+      Value *NewPtr =
+          LowOffset > 0u
+              ? Builder.CreateInBoundsPtrAdd(PtrOp, Builder.getInt64(LowOffset))
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arsenm wrote:

Should use constant of correct address space size. If this is a 32-bit pointer it adds an extra step 

https://github.com/llvm/llvm-project/pull/149093