JIT: disable scev analysis for non-integral types (#107618)

We could conceivably handle some cases of double and vector evolution, or perhaps
invariant subtrees of these types in integral scevs, but we're not set up to do this today.

Fixes #107543.

src/coreclr/jit/scev.cpp

@@ -515,6 +515,11 @@ Scev* ScalarEvolutionContext::CreateScevForConstant(GenTreeIntConCommon* tree)
 //
 Scev* ScalarEvolutionContext::AnalyzeNew(BasicBlock* block, GenTree* tree, int depth)
 {
+    if (!varTypeIsIntegralOrI(tree->TypeGet()))
+    {
+        return nullptr;
+    }
+
     switch (tree->OperGet())
     {
         case GT_CNS_INT:

src/tests/JIT/Regression/JitBlue/Runtime_107543/Runtime_107543.cs

@@ -0,0 +1,31 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// Generated by Fuzzlyn v2.4 on 2024-09-08 14:58:55
+// Run on X64 Windows
+// Seed: 9273539092987075617-vectort,vector128,vector256,x86aes,x86avx,x86avx2,x86avx512bw,x86avx512bwvl,x86avx512cd,x86avx512cdvl,x86avx512dq,x86avx512dqvl,x86avx512f,x86avx512fvl,x86avx512fx64,x86bmi1,x86bmi1x64,x86bmi2,x86bmi2x64,x86fma,x86lzcnt,x86lzcntx64,x86pclmulqdq,x86popcnt,x86popcntx64,x86sse,x86ssex64,x86sse2,x86sse2x64,x86sse3,x86sse41,x86sse41x64,x86sse42,x86sse42x64,x86ssse3,x86x86base
+// Reduced from 133.3 KiB to 1.6 KiB in 00:01:44
+// Hits JIT assert in Release:
+// Assertion failed '(unop->Type == TYP_LONG) && (op1->Type == TYP_INT)' in 'Program:Main(Fuzzlyn.ExecutionServer.IRuntime)' during 'Optimize Induction Variables' (IL size 100; hash 0xade6b36b; FullOpts)
+// 
+//     File: D:\a\_work\1\s\src\coreclr\jit\scev.cpp Line: 1094
+// 
+// Further simplified by hand
+
+using System;
+using Xunit;
+
+public class Runtime_107543
+{
+    [Fact]
+    public static int Problem()
+    {
+        double d = 0;
+        long i = 0;
+        for (int v = 0; v < 100; v++)
+        {
+            i += (long)d++;
+        }
+        return (int)(i - 4850);
+    }
+}

src/tests/JIT/Regression/JitBlue/Runtime_107543/Runtime_107543.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <Optimize>True</Optimize>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildProjectName).cs" />
+  </ItemGroup>
+</Project>