[llvm] CallPromotionUtils: Correctly use IndexSize when determining the bit width of pointer offsets. (PR #119138)

[Nikita Popov via llvm-commits]

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@@ -692,14 +692,17 @@ bool llvm::tryPromoteCall(CallBase &CB) {
   if (!VTableEntryLoad)
     return false; // Not a vtable entry load.
   Value *VTableEntryPtr = VTableEntryLoad->getPointerOperand();
-  APInt VTableOffset(DL.getTypeSizeInBits(VTableEntryPtr->getType()), 0);
+  APInt VTableOffset(DL.getIndexSizeInBits(
+                         VTableEntryPtr->getType()->getPointerAddressSpace()),
+                     0);
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nikic wrote:

You can use `getIndexTypeSizeInBits()` to make this more compact.

https://github.com/llvm/llvm-project/pull/119138