JIT: disable scev analysis for non-integral types (dotnet#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 dotnet#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>