From 57717a20d39be4f6d3d5fe477660b8fce84b2eb4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Guilloux?= <glx22@users.noreply.github.com>
Date: Tue, 13 Sep 2022 12:27:49 +0200
Subject: [PATCH] Fix #9966: workaround a VS2022 optimisation bug (#10029)

---
 cmake/CompileFlags.cmake | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cmake/CompileFlags.cmake b/cmake/CompileFlags.cmake
index ad4a46aca7..b1cec89daf 100644
--- a/cmake/CompileFlags.cmake
+++ b/cmake/CompileFlags.cmake
@@ -56,6 +56,11 @@ macro(compile_flags)
 
     if(MSVC)
         add_compile_options(/W3)
+        if(MSVC_VERSION GREATER 1929)
+            # Starting with version 19.30, there is an optimisation bug, see #9966 for details
+            # This flag disables the broken optimisation to work around the bug
+            add_compile_options(/d2ssa-rse-)
+        endif()
     elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
         add_compile_options(
             -W