[clang] [clang] model WASM alloca addrspaces in Sema (PR #197540)

[Jameson Nash via cfe-commits]

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@@ -15101,6 +15070,15 @@ LangAS ASTContext::getLangASForBuiltinAddressSpace(unsigned AS) const {
   if (LangOpts.CUDA)
     return getTargetInfo().getCUDABuiltinAddressSpace(AS);
 
+  if (getTargetInfo().getTriple().isWasm()) {
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vtjnash wrote:

It looks like `getLangASFromTargetAS` doesn't appear to have knowledge of the Triple (it's a global function), so this seemed to be what was done for existing targets

https://github.com/llvm/llvm-project/pull/197540