[clang] [RISCV][Clang] Added builtin support for experimental Zimop extension (PR #79971)

[Wang Pengcheng via cfe-commits]

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@@ -89,5 +89,13 @@ TARGET_BUILTIN(__builtin_riscv_sm3p1, "UiUi", "nc", "zksh")
 TARGET_BUILTIN(__builtin_riscv_ntl_load, "v.", "t", "zihintntl")
 TARGET_BUILTIN(__builtin_riscv_ntl_store, "v.", "t", "zihintntl")
 
+// Zimop extension
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wangpc-pp wrote:

You may need to rebase as I have rewritten this file in TableGen.

https://github.com/llvm/llvm-project/pull/79971