[libclc] [libclc] Optimize generic CLC fmin/fmax (PR #128506)

[Wenju He via cfe-commits]

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@@ -43,8 +48,10 @@ _CLC_DEF _CLC_OVERLOAD half __clc_fmin(half x, half y) {
   return (y < x) ? y : x;
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wenju-he wrote:

can we use this same implementation for float and double?

https://github.com/llvm/llvm-project/pull/128506