[clang] [CIR] Add address space casts for pointer arguments when creating a call (PR #192303)

[Jan Leyonberg via cfe-commits]

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@@ -1109,6 +1109,19 @@ RValue CIRGenFunction::emitCall(const CIRGenFunctionInfo &funcInfo,
       if (argType != v.getType() && mlir::isa<cir::IntType>(v.getType()))
         cgm.errorNYI(loc, "emitCall: widening integer call argument");
 
+      // If we have a pointer argument and there's an address space mismatch,
+      // insert an address_space cast to match the expected function signature.
+      if (argType != v.getType()) {
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jsjodin wrote:

This is how clang currently handles these. My guess is that lowering may introduce allocas after sema and potentially pass pointers to these as arguments.

https://github.com/llvm/llvm-project/pull/192303