From 2a996c877af09308d4676a16cefb59d1ef1d2eb4 Mon Sep 17 00:00:00 2001
From: Roman Zhuykov <roman.zhuykov@huawei.com>
Date: Fri, 17 May 2024 18:31:27 +0300
Subject: [PATCH] Introduce option for splitting libllvm.so
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Issue：https://gitee.com/openharmony/third_party_llvm-project/issues/I9Q9EY

Signed-off-by: Roman Zhuykov <roman.zhuykov@huawei.com>
---
 llvm-build/build.py                           |  2 +-
 llvm/CMakeLists.txt                           |  1 +
 llvm/lib/Target/XVM/CMakeLists.txt            |  2 +-
 .../Target/XVM/MCTargetDesc/CMakeLists.txt    |  2 +-
 llvm/lib/Target/XVM/TargetInfo/CMakeLists.txt |  4 +-
 llvm/tools/llvm-shlib/CMakeLists.txt          | 45 +++++++++++--------
 6 files changed, 33 insertions(+), 23 deletions(-)

diff --git a/llvm-build/build.py b/llvm-build/build.py
index b378ac12cc9e..e5fbddec070e 100755
--- a/llvm-build/build.py
+++ b/llvm-build/build.py
@@ -82,7 +82,7 @@ class BuildConfig():
         self.enable_check_abi = args.enable_check_abi
         self.discover_paths()
 
-        self.TARGETS = 'AArch64;ARM;BPF;Mips;RISCV;X86'
+        self.TARGETS = 'AArch64;ARM;BPF;XVM;Mips;RISCV;X86'
         self.ORIG_ENV = dict(os.environ)
         self.VERSION = None # autodetected
 
diff --git a/llvm/CMakeLists.txt b/llvm/CMakeLists.txt
index 34c1f19a9f95..7034d7f2076e 100644
--- a/llvm/CMakeLists.txt
+++ b/llvm/CMakeLists.txt
@@ -704,6 +704,7 @@ else()
     set(LLVM_BUILD_LLVM_DYLIB_default ON)
   endif()
   option(LLVM_BUILD_LLVM_DYLIB "Build libllvm dynamic library" ${LLVM_BUILD_LLVM_DYLIB_default})
+  option(LLVM_SPLIT_LLVM_DYLIB_TARGETS "Split libllvm dynamic library per targets" OFF) # OHOS_LOCAL
 endif()
 
 if (LLVM_LINK_LLVM_DYLIB AND BUILD_SHARED_LIBS)
diff --git a/llvm/lib/Target/XVM/CMakeLists.txt b/llvm/lib/Target/XVM/CMakeLists.txt
index 0f5ef89440fd..0fe324ea3f8b 100644
--- a/llvm/lib/Target/XVM/CMakeLists.txt
+++ b/llvm/lib/Target/XVM/CMakeLists.txt
@@ -1,5 +1,5 @@
 
-if(LLVM_BUILD_LLVM_DYLIB)
+if(LLVM_SPLIT_LLVM_DYLIB_TARGETS)
   ADD_DEFINITIONS("-DXVM_DYLIB_MODE=1")
 endif()
 
diff --git a/llvm/lib/Target/XVM/MCTargetDesc/CMakeLists.txt b/llvm/lib/Target/XVM/MCTargetDesc/CMakeLists.txt
index 04738c3f0a8c..d290513bf911 100644
--- a/llvm/lib/Target/XVM/MCTargetDesc/CMakeLists.txt
+++ b/llvm/lib/Target/XVM/MCTargetDesc/CMakeLists.txt
@@ -1,5 +1,5 @@
 
-if(LLVM_BUILD_LLVM_DYLIB)
+if(LLVM_SPLIT_LLVM_DYLIB_TARGETS)
   ADD_DEFINITIONS("-DXVM_DYLIB_MODE=1")
 endif()
 
diff --git a/llvm/lib/Target/XVM/TargetInfo/CMakeLists.txt b/llvm/lib/Target/XVM/TargetInfo/CMakeLists.txt
index aad77bae6d27..efe91ea71359 100644
--- a/llvm/lib/Target/XVM/TargetInfo/CMakeLists.txt
+++ b/llvm/lib/Target/XVM/TargetInfo/CMakeLists.txt
@@ -1,6 +1,6 @@
 
-if(LLVM_BUILD_LLVM_DYLIB)
-ADD_DEFINITIONS("-DXVM_DYLIB_MODE=1")
+if(LLVM_SPLIT_LLVM_DYLIB_TARGETS)
+  ADD_DEFINITIONS("-DXVM_DYLIB_MODE=1")
 endif()
 
 add_llvm_component_library(LLVMXVMInfo
diff --git a/llvm/tools/llvm-shlib/CMakeLists.txt b/llvm/tools/llvm-shlib/CMakeLists.txt
index f48196378489..a8b2d53f630b 100644
--- a/llvm/tools/llvm-shlib/CMakeLists.txt
+++ b/llvm/tools/llvm-shlib/CMakeLists.txt
@@ -14,6 +14,7 @@ if(LLVM_BUILD_LLVM_DYLIB)
   if(MSVC)
     message(FATAL_ERROR "Generating libLLVM is not supported on MSVC")
   endif()
+
   # OHOS_LOCAL begin
   if (LLVM_LINK_LLVM_DYLIB)
     set(INSTALL_WITH_TOOLCHAIN INSTALL_WITH_TOOLCHAIN)
@@ -28,20 +29,21 @@ if(LLVM_BUILD_LLVM_DYLIB)
   list(REMOVE_ITEM LIB_NAMES "LLVMTableGen")
 
   # OHOS_LOCAL begin
-  foreach(target ${LLVM_TARGETS_TO_BUILD})
-    get_property(target_link_components TARGET ${target} PROPERTY LLVM_LINK_COMPONENTS)
-    set(objects "")
-    foreach(component ${target_link_components})
-      list(REMOVE_ITEM LIB_NAMES "LLVM${component}")
-      list(APPEND objects "$<TARGET_OBJECTS:LLVM${component}>")
+  if (LLVM_SPLIT_LLVM_DYLIB_TARGETS)
+    foreach(target ${LLVM_TARGETS_TO_BUILD})
+      get_property(target_link_components TARGET ${target} PROPERTY LLVM_LINK_COMPONENTS)
+      set(objects "")
+      foreach(component ${target_link_components})
+        list(REMOVE_ITEM LIB_NAMES "LLVM${component}")
+        list(APPEND objects "$<TARGET_OBJECTS:LLVM${component}>")
+      endforeach()
+      add_llvm_library("LLVM${target}Target"
+                       MODULE
+                       DISABLE_LLVM_LINK_LLVM_DYLIB
+                       ${INSTALL_WITH_TOOLCHAIN}
+                       OBJLIBS ${objects})
     endforeach()
-    add_llvm_library("LLVM${target}Target"
-                     MODULE
-                     DISABLE_LLVM_LINK_LLVM_DYLIB
-                     ${INSTALL_WITH_TOOLCHAIN}
-                     OBJLIBS ${objects})
-
-  endforeach()
+  endif()
   # OHOS_LOCAL end
 
   if(LLVM_DYLIB_EXPORTED_SYMBOL_FILE)
@@ -50,8 +52,12 @@ if(LLVM_BUILD_LLVM_DYLIB)
   endif()
 
   add_llvm_library(LLVM SHARED DISABLE_LLVM_LINK_LLVM_DYLIB SONAME ${INSTALL_WITH_TOOLCHAIN} ${SOURCES})
-  # OHOS_LOCAL
-  target_compile_definitions(LLVM PRIVATE "LLVM_BUILD_BACKEND_MODULE")
+
+  # OHOS_LOCAL begin
+  if (LLVM_SPLIT_LLVM_DYLIB_TARGETS)
+    target_compile_definitions(LLVM PRIVATE "LLVM_BUILD_BACKEND_MODULE")
+  endif()
+  # OHOS_LOCAL end
 
   list(REMOVE_DUPLICATES LIB_NAMES)
   if(("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux") OR (MINGW) OR (HAIKU)
@@ -85,10 +91,13 @@ if(LLVM_BUILD_LLVM_DYLIB)
   endif()
 
   target_link_libraries(LLVM PRIVATE ${LIB_NAMES})
+
   # OHOS_LOCAL begin
-  foreach(target ${LLVM_TARGETS_TO_BUILD})
-    add_dependencies(LLVM LLVM${target}Target)
-  endforeach()
+  if (LLVM_SPLIT_LLVM_DYLIB_TARGETS)
+    foreach(target ${LLVM_TARGETS_TO_BUILD})
+      add_dependencies(LLVM LLVM${target}Target)
+    endforeach()
+  endif()
   # OHOS_LOCAL end
 
   if (APPLE)
-- 
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