[dynarmic, cmake] allow LTO build for dynarmic (#252)

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: #252
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

.ci/linux/build.sh

@@ -104,6 +104,7 @@ cmake .. -G Ninja \
     -DYUZU_USE_QT_WEB_ENGINE=$WEBENGINE \
     -DYUZU_USE_FASTER_LD=ON \
     -DYUZU_ENABLE_LTO=ON \
+    -DDYNARMIC_ENABLE_LTO=ON \
     "${EXTRA_CMAKE_FLAGS[@]}"
 
 ninja -j${NPROC}

.ci/windows/build.sh

@@ -52,6 +52,7 @@ cmake .. -G Ninja \
     -DYUZU_USE_QT_MULTIMEDIA=$MULTIMEDIA \
     -DYUZU_USE_QT_WEB_ENGINE=$WEBENGINE \
     -DYUZU_ENABLE_LTO=ON \
+    -DDYNARMIC_ENABLE_LTO=ON \
     "${EXTRA_CMAKE_FLAGS[@]}"
 
 ninja

src/android/app/build.gradle.kts

@@ -179,7 +179,8 @@ android {
                     "-DCMAKE_EXPORT_COMPILE_COMMANDS=ON",
                     "-DBUILD_TESTING=OFF",
                     "-DYUZU_TESTS=OFF",
-                    "-DDYNARMIC_TESTS=OFF"
+                    "-DDYNARMIC_TESTS=OFF",
+                    "-DDYNARMIC_ENABLE_LTO=ON"
                 )
 
                 abiFilters("arm64-v8a")

src/dynarmic/CMakeLists.txt

@@ -23,6 +23,7 @@ option(DYNARMIC_USE_PRECOMPILED_HEADERS "Use precompiled headers" ON)
 option(DYNARMIC_INSTALL "Install dynarmic headers and CMake files" OFF)
 option(DYNARMIC_USE_BUNDLED_EXTERNALS "Use all bundled externals (useful when e.g. cross-compiling)" OFF)
 option(DYNARMIC_WARNINGS_AS_ERRORS "Warnings as errors" ${MASTER_PROJECT})
+option(DYNARMIC_ENABLE_LTO "Enable LTO" OFF)
 if (NOT DEFINED DYNARMIC_FRONTENDS)
     set(DYNARMIC_FRONTENDS "A32;A64" CACHE STRING "Selects which frontends to enable")
 endif()

src/dynarmic/src/dynarmic/CMakeLists.txt

@@ -440,6 +440,10 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
 endif()
 target_compile_definitions(dynarmic PRIVATE FMT_USE_USER_DEFINED_LITERALS=1)
 
+if (DYNARMIC_ENABLE_LTO)
+    set_property(TARGET dynarmic PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
+endif()
+
 if (DYNARMIC_USE_PRECOMPILED_HEADERS)
     set(PRECOMPILED_HEADERS "$<$<COMPILE_LANGUAGE:CXX>:${CMAKE_CURRENT_SOURCE_DIR}/ir/ir_emitter.h>")
     if ("x86_64" IN_LIST ARCHITECTURE)