[llvm] [clang] riscv vector cc (PR #77560)

[Craig Topper via cfe-commits]

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@@ -5400,6 +5400,16 @@ for clang builtin functions.
   }];
 }
 
+def RISCVVectorCCDocs : Documentation {
+ let Category = DocCatCallingConvs;
+ let Content = [{
+The ``riscv_vector_cc`` attribute can be applied to a function. It preserves 15
+registers namely, v1-v7 and v24-v31 as callee-saved. Callers thus don't need
+to save these registers before function calls, and callees only need to save
+them only if they use them.
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topperc wrote:

"callees only need to save them only " I don't think we need "only" in that sentence twice

https://github.com/llvm/llvm-project/pull/77560