Enable .NET9 builds (#670)

* build

* intrinsics

* infer

* codeql

* try4

* try4

* 3

* fix codeql

* revert proj

---------

Author: bitfaster

.github/workflows/codeql-analysis.yml

@@ -38,11 +38,11 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@v3
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -52,8 +52,8 @@ jobs:
 
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
+    #- name: Autobuild
+    #  uses: github/codeql-action/autobuild@v3
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -65,6 +65,16 @@ jobs:
     #- run: |
     #   make bootstrap
     #   make release
+    - name: Setup .NET SDK
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '9.0.x'
+
+    - name: Restore dependencies
+      run: dotnet restore
+
+    - name: Build
+      run: dotnet build --configuration Debug --no-restore
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@v3

.github/workflows/gate.yml

@@ -24,6 +24,7 @@ jobs:
           3.1.x
           6.0.x
           8.0.x
+          9.0.x
     - name: Install dependencies
       run: dotnet restore
     - name: Build
@@ -98,6 +99,7 @@ jobs:
         dotnet-version: |
           6.0.x
           8.0.x
+          9.0.x
     - name: Install dependencies
       run: dotnet restore
     - name: Build
@@ -139,6 +141,7 @@ jobs:
         dotnet-version: |
           6.0.x
           8.0.x
+          9.0.x
     - name: Install dependencies
       run: dotnet restore
     - name: Build

.github/workflows/infer.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v2
       with:
-        dotnet-version: 8.0.x
+        dotnet-version: 9.0.x
     - name: Install dependencies
       run: dotnet restore
     - name: Build

BitFaster.Caching/Intrinsics.cs

@@ -2,7 +2,7 @@
 using System.Runtime.Intrinsics.X86;
 #endif
 
-#if NET6_0
+#if NET6_0_OR_GREATER
 using System.Runtime.Intrinsics.Arm;
 #endif