From 902c392690f0048a3421726b98766aa1bac6f411 Mon Sep 17 00:00:00 2001
From: Tanner Gooding <tagoo@outlook.com>
Date: Wed, 19 Jun 2024 12:58:16 -0700
Subject: [PATCH] Add an IsKnownConstant path to SinCos

---
 .../System.Private.CoreLib/src/System/Math.CoreCLR.cs        | 5 +++++
 .../System.Private.CoreLib/src/System/MathF.CoreCLR.cs       | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/src/coreclr/System.Private.CoreLib/src/System/Math.CoreCLR.cs b/src/coreclr/System.Private.CoreLib/src/System/Math.CoreCLR.cs
index 1384da2c81d1f..530355082d26d 100644
--- a/src/coreclr/System.Private.CoreLib/src/System/Math.CoreCLR.cs
+++ b/src/coreclr/System.Private.CoreLib/src/System/Math.CoreCLR.cs
@@ -95,6 +95,11 @@ public static partial class Math
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static unsafe (double Sin, double Cos) SinCos(double x)
         {
+            if (RuntimeHelpers.IsKnownConstant(x))
+            {
+                return (Sin(x), Cos(x));
+            }
+
             double sin, cos;
             SinCos(x, &sin, &cos);
             return (sin, cos);
diff --git a/src/coreclr/System.Private.CoreLib/src/System/MathF.CoreCLR.cs b/src/coreclr/System.Private.CoreLib/src/System/MathF.CoreCLR.cs
index 2bef2b8d3e175..90403480bf5df 100644
--- a/src/coreclr/System.Private.CoreLib/src/System/MathF.CoreCLR.cs
+++ b/src/coreclr/System.Private.CoreLib/src/System/MathF.CoreCLR.cs
@@ -92,6 +92,11 @@ public static partial class MathF
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static unsafe (float Sin, float Cos) SinCos(float x)
         {
+            if (RuntimeHelpers.IsKnownConstant(x))
+            {
+                return (Sin(x), Cos(x));
+            }
+
             float sin, cos;
             SinCos(x, &sin, &cos);
             return (sin, cos);