[llvm] [WebAssembly][FastISel] Emit signed loads for sext of i8/i16/i32 (PR #182333)

[Derek Schuff via llvm-commits]

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@@ -1281,23 +1281,54 @@ bool WebAssemblyFastISel::selectLoad(const Instruction *I) {
     return false;
 
   // TODO: Fold a following sign-/zero-extend into the load instruction.
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dschuff wrote:

this comment can be removed now?

https://github.com/llvm/llvm-project/pull/182333