[PATCH] D155546: [clang][Interp] Implement __builtin_fmin

[Aaron Ballman via Phabricator via cfe-commits]

aaron.ballman added a comment.

In D155546#4532839 <https://reviews.llvm.org/D155546#4532839>, @jcranmer-intel wrote:

> Treating sNaN as always signaling FE_INVALID is probably the safer option.

That sounds reasonable to me.



================
Comment at: clang/test/AST/Interp/builtin-functions.cpp:65-73
+  constexpr float f1 = __builtin_fmin(1.0, 2.0f);
+  static_assert(f1 == 1.0f, "");
+
+  constexpr float min = __builtin_fmin(__builtin_nan(""), 1);
+  static_assert(min == 1, "");
+  constexpr float min2 = __builtin_fmin(1, __builtin_nan(""));
+  static_assert(min2 == 1, "");
----------------
Can you add a test using `__builtin_nans` to show that it results in an invalid constant expression because of the `FE_INVALID` signal?


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