[AMDGPU] Remove outdated COV6 warning

Author: shiltian

clang/include/clang/Basic/DiagnosticDriverKinds.td

@@ -92,10 +92,6 @@ def err_drv_hipspv_no_hip_path : Error<
   "'--hip-path' must be specified when offloading to SPIR-V unless '-nogpuinc' "
   "is given">;
 
-// TODO: Remove when COV6 is fully supported by ROCm.
-def warn_drv_amdgpu_cov6: Warning<
-  "code object v6 is still in development and not ready for production use yet;"
-  " use at your own risk">;
 def err_drv_undetermined_gpu_arch : Error<
   "cannot determine %0 architecture: %1; consider passing it via '%2'; "
   "environment variable CLANG_TOOLCHAIN_PROGRAM_TIMEOUT specifies the tool "

clang/lib/Driver/ToolChains/CommonArgs.cpp

@@ -2748,12 +2748,6 @@ void tools::checkAMDGPUCodeObjectVersion(const Driver &D,
       if (Remnant || CodeObjVer < MinCodeObjVer || CodeObjVer > MaxCodeObjVer)
         D.Diag(diag::err_drv_invalid_int_value)
             << CodeObjArg->getAsString(Args) << CodeObjArg->getValue();
-
-      // COV6 is only supported by LLVM at the time of writing this, and it's
-      // expected to take some time before all ROCm components fully
-      // support it. In the meantime, make sure users are aware of this.
-      if (CodeObjVer == 6)
-        D.Diag(diag::warn_drv_amdgpu_cov6);
     }
   }
 }

clang/test/Driver/hip-code-object-version.hip

@@ -27,11 +27,6 @@
 // RUN:   --offload-arch=gfx906 --rocm-path=%S/Inputs/rocm \
 // RUN:   %s 2>&1 | FileCheck -check-prefix=V6 %s
 
-// V6: warning: code object v6 is still in development and not ready for production use yet; use at your own risk
-// V6: "-mcode-object-version=6"
-// V6: "-mllvm" "--amdhsa-code-object-version=6"
-// V6: "-targets=host-x86_64-unknown-linux-gnu,hipv4-amdgcn-amd-amdhsa--gfx906"
-
 
 // Check bundle ID for code object version default
 

clang/test/Misc/warning-flags.c

@@ -40,7 +40,6 @@ CHECK-NEXT:   warn_collection_expr_type
 CHECK-NEXT:   warn_conflicting_variadic
 CHECK-NEXT:   warn_delete_array_type
 CHECK-NEXT:   warn_double_const_requires_fp64
-CHECK-NEXT:   warn_drv_amdgpu_cov6
 CHECK-NEXT:   warn_drv_assuming_mfloat_abi_is
 CHECK-NEXT:   warn_drv_clang_unsupported
 CHECK-NEXT:   warn_drv_pch_not_first_include