[clang] [llvm] [WebAssembly] Implement prototype f32.store_f16 instruction. (PR #91545)

[Brendan Dahl via cfe-commits]

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@@ -192,6 +192,7 @@ TARGET_BUILTIN(__builtin_wasm_relaxed_dot_bf16x8_add_f32_f32x4, "V4fV8UsV8UsV4f"
 
 // Half-Precision (fp16)
 TARGET_BUILTIN(__builtin_wasm_loadf16_f32, "fh*", "nU", "half-precision")
+TARGET_BUILTIN(__builtin_wasm_storef16_f32, "vfh*", "nU", "half-precision")
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brendandahl wrote:

What does `pure` mean in this context? The docs in clang/Basic/Builtins.def don't have any info on this.

https://github.com/llvm/llvm-project/pull/91545