[clang] [Clang][AMDGPU] Add builtins for instrinsic `llvm.amdgcn.raw.buffer.store` (PR #94576)

[Shilei Tian via cfe-commits]

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@@ -149,6 +149,12 @@ BUILTIN(__builtin_amdgcn_mqsad_pk_u16_u8, "WUiWUiUiWUi", "nc")
 BUILTIN(__builtin_amdgcn_mqsad_u32_u8, "V4UiWUiUiV4Ui", "nc")
 
 BUILTIN(__builtin_amdgcn_make_buffer_rsrc, "Qbv*sii", "nc")
+BUILTIN(__builtin_amdgcn_raw_buffer_store_b8, "vcQbiiIi", "n")
+BUILTIN(__builtin_amdgcn_raw_buffer_store_b16, "vsQbiiIi", "n")
+BUILTIN(__builtin_amdgcn_raw_buffer_store_b32, "viQbiiIi", "n")
+BUILTIN(__builtin_amdgcn_raw_buffer_store_b64, "vWiQbiiIi", "n")
+BUILTIN(__builtin_amdgcn_raw_buffer_store_b96, "vV3iQbiiIi", "n")
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shiltian wrote:

isn't it gonna be a pain to even do an `i64` to `v2i32`?

https://github.com/llvm/llvm-project/pull/94576