[clang] [clang] Use constant rounding mode for floating literals (PR #90877)

[Erich Keane via cfe-commits]

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@@ -79,3 +79,16 @@ float V7 = []() -> float {
   0x0.000001p0F);
 }();
 // CHECK: @V7 = {{.*}} float 1.000000e+00
+
+template<float V> struct L {
+  constexpr L() : value(V) {}
+  float value;
+};
+
+#pragma STDC FENV_ROUND FE_DOWNWARD
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erichkeane wrote:

Ah, I see that github ate the first line of my comment, see above, i'v eedited it.

https://github.com/llvm/llvm-project/pull/90877