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

[Sameer Sahasrabuddhe via cfe-commits]

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@@ -199,15 +214,31 @@ RValue CodeGenFunction::EmitAMDGPUDevicePrintfCallExpr(const CallExpr *E) {
     }
 
     llvm::Value *Arg = A.getRValue(*this).getScalarVal();
+    if (isString(A.getType().getTypePtr()) && CGM.getLangOpts().OpenCL)
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ssahasra wrote:

The typecast can be inserted later when the arguments are actually processed. At that point, we already know which args are strings because we have parsed the format string.

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