[clang] [CIR] Upstream Builtin FloorOp (PR #169954)

[Letu Ren via cfe-commits]

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@@ -4722,6 +4722,16 @@ def CIR_FAbsOp : CIR_UnaryFPToFPBuiltinOp<"fabs", "FAbsOp"> {
   }];
 }
 
+def CIR_FloorOp : CIR_UnaryFPToFPBuiltinOp<"floor", "FloorOp"> {
+  let summary = "Computes the floating-point floor value";
+  let description = [{
+    `cir.floor` computes the floor of a floating-point operand and returns
+    a result of the same type.
+
+    Floating-point exceptions are ignored, and it does not set `errno`.
+  }];
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FantasqueX wrote:

OK. I'll add an example for CeilOp as well.

https://github.com/llvm/llvm-project/pull/169954