[llvm] [InferAS] Infer the address space of inttoptr (PR #173244)

[Matt Arsenault via llvm-commits]

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@@ -193,6 +193,11 @@ class TargetTransformInfoImplBase {
     return FromPtrBits.anyextOrTrunc(ToASBitSize);
   }
 
+  virtual APInt getAddrSpaceCastPreservedPtrMask(unsigned SrcAS,
+                                                 unsigned DstAS) const {
+    return APInt::getZero(DL.getPointerSizeInBits());
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arsenm wrote:

This should not use the default address space size (actually is this supposed to return the source width, the dest width, or is it assumed they are the same?)

https://github.com/llvm/llvm-project/pull/173244