[clang] [llvm] [AMDGPU] Enable OpenCL hostcall printf (WIP) (PR #72556)

[Sameer Sahasrabuddhe via cfe-commits]

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@@ -178,17 +181,29 @@ RValue CodeGenFunction::EmitNVPTXDevicePrintfCallExpr(const CallExpr *E) {
       E, this, GetVprintfDeclaration(CGM.getModule()), false);
 }
 
+// Deterimines if an argument is a string
+static bool isString(const clang::Type *argXTy) {
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ssahasra wrote:

This could be called "MayBeString()" at best. It's not necessary that a char* argument type is a C-style string.

https://github.com/llvm/llvm-project/pull/72556