[clang] [AMDGPU] Add sema check for global_atomic_fadd_v2f16 builtin (PR #158145)

[Matt Arsenault via cfe-commits]

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@@ -280,11 +280,11 @@ TARGET_BUILTIN(__builtin_amdgcn_ds_atomic_fadd_f64, "dd*3d", "t", "gfx90a-insts"
 TARGET_BUILTIN(__builtin_amdgcn_ds_atomic_fadd_f32, "ff*3f", "t", "gfx8-insts")
 
 TARGET_BUILTIN(__builtin_amdgcn_flat_atomic_fadd_f32, "ff*0f", "t", "gfx940-insts")
-TARGET_BUILTIN(__builtin_amdgcn_flat_atomic_fadd_v2f16, "V2hV2h*0V2h", "t", "atomic-flat-pk-add-16-insts")
+TARGET_BUILTIN(__builtin_amdgcn_flat_atomic_fadd_v2f16, "V2xV2x*0V2x", "n", "atomic-flat-pk-add-16-insts")
 TARGET_BUILTIN(__builtin_amdgcn_flat_atomic_fadd_v2bf16, "V2sV2s*0V2s", "t", "atomic-flat-pk-add-16-insts")
 TARGET_BUILTIN(__builtin_amdgcn_global_atomic_fadd_v2bf16, "V2sV2s*1V2s", "t", "atomic-global-pk-add-bf16-inst")
 TARGET_BUILTIN(__builtin_amdgcn_ds_atomic_fadd_v2bf16, "V2sV2s*3V2s", "t", "atomic-ds-pk-add-16-insts")
-TARGET_BUILTIN(__builtin_amdgcn_ds_atomic_fadd_v2f16, "V2hV2h*3V2h", "t", "atomic-ds-pk-add-16-insts")
+TARGET_BUILTIN(__builtin_amdgcn_ds_atomic_fadd_v2f16, "V2xV2x*3V2x", "n", "atomic-ds-pk-add-16-insts")
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arsenm wrote:

Also make sure to test this with all of these similar intrinsics, the "t"s are all suspicious (I'm guessing if it was for anything, it was hacking around the address space of the pointer across the languages) 

https://github.com/llvm/llvm-project/pull/158145