[clang] [AMDGPU] Treat printf as builtin for OpenCL (PR #72554)

[Sameer Sahasrabuddhe via cfe-commits]

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@@ -406,5 +410,9 @@ TARGET_BUILTIN(__builtin_amdgcn_cvt_pk_fp8_f32, "iffiIb", "nc", "fp8-insts")
 TARGET_BUILTIN(__builtin_amdgcn_cvt_sr_bf8_f32, "ifiiIi", "nc", "fp8-insts")
 TARGET_BUILTIN(__builtin_amdgcn_cvt_sr_fp8_f32, "ifiiIi", "nc", "fp8-insts")
 
+// OpenCL
+LANGBUILTIN(printf, "icC*4.", "fp:0:", ALL_OCL_LANGUAGES)
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ssahasra wrote:

I still don't see why this is necessary. A target-defined language-specific builtin is a whole new beast. What is missing in the current parsing of OpenCL printf?

https://github.com/llvm/llvm-project/pull/72554