From 24ba507b1dd70cf468a1beadea6ca6336fe1d40f Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@python.org>
Date: Wed, 29 Mar 2023 00:47:13 +0100
Subject: [PATCH] gh-103097: Add workaround for Windows ARM64 compiler bug
 (GH-103098)

See https://developercommunity.visualstudio.com/t/Regression-in-MSVC-1433-1434-ARM64-co/10224361 for details of the issue. It only applies to version 14.34.
---
 PCbuild/pyproject.props | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/PCbuild/pyproject.props b/PCbuild/pyproject.props
index 92c7849d3bc..36c4c269d05 100644
--- a/PCbuild/pyproject.props
+++ b/PCbuild/pyproject.props
@@ -21,6 +21,13 @@
     <LinkIncremental Condition="$(Configuration) != 'Debug'">false</LinkIncremental>
   </PropertyGroup>
 
+  <PropertyGroup Label="MSVC Bug Workarounds" Condition="$(VCToolsVersion) != ''">
+    <_VCToolsVersion>$([System.Version]::Parse(`$(VCToolsVersion)`).Major).$([System.Version]::Parse(`$(VCToolsVersion)`).Minor)</_VCToolsVersion>
+
+    <!-- See https://developercommunity.visualstudio.com/t/Regression-in-MSVC-1433-1434-ARM64-co/10224361 -->
+    <MSVCHasBrokenARM64Clamping Condition="$(_VCToolsVersion) == '14.34'">true</MSVCHasBrokenARM64Clamping>
+  </PropertyGroup>
+
   <PropertyGroup>
     <_DebugPreprocessorDefinition>NDEBUG;</_DebugPreprocessorDefinition>
     <_DebugPreprocessorDefinition Condition="$(Configuration) == 'Debug'">_DEBUG;</_DebugPreprocessorDefinition>
@@ -50,6 +57,7 @@
       <AdditionalOptions>/utf-8 %(AdditionalOptions)</AdditionalOptions>
       <AdditionalOptions Condition="$(PlatformToolset) == 'ClangCL'">-Wno-deprecated-non-prototype -Wno-unused-label -Wno-pointer-sign -Wno-incompatible-pointer-types-discards-qualifiers -Wno-unused-function %(AdditionalOptions)</AdditionalOptions>
       <AdditionalOptions Condition="$(Configuration) != 'Debug' and $(PlatformToolset) == 'ClangCL'">-flto %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions Condition="$(MSVCHasBrokenARM64Clamping) == 'true' and $(Platform) == 'ARM64'">-d2pattern-opt-disable:-932189325 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <ClCompile Condition="$(Configuration) == 'Debug'">
       <InlineFunctionExpansion>OnlyExplicitInline</InlineFunctionExpansion>
@@ -79,6 +87,7 @@
       <LinkTimeCodeGeneration Condition="$(SupportPGO) and $(Configuration) == 'PGUpdate'">PGUpdate</LinkTimeCodeGeneration>
       <AdditionalDependencies>advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <AdditionalOptions Condition="$(Configuration) != 'Debug'">/OPT:REF,NOICF %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions Condition="$(MSVCHasBrokenARM64Clamping) == 'true' and $(Platform) == 'ARM64'">-d2:-pattern-opt-disable:-932189325 %(AdditionalOptions)</AdditionalOptions>
     </Link>
     <Lib>
       <LinkTimeCodeGeneration Condition="$(Configuration) == 'Release'">true</LinkTimeCodeGeneration>