Revert r349517 "[CMake] Default options for faster executables on MSVC"

llvm-svn: 349656

llvm/CMakeLists.txt

@@ -370,10 +370,6 @@ option(LLVM_ENABLE_LLD "Use lld as C and C++ linker." OFF)
 option(LLVM_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
 option(LLVM_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
 
-if (MSVC)
-   option(LLVM_ENABLE_INCREMENTAL_LINK "Link incrementally. Enabling it might produce slower executables." OFF)
-endif()
-
 option(LLVM_ENABLE_DUMP "Enable dump functions even when assertions are disabled" OFF)
 
 if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )

llvm/cmake/modules/ChooseMSVCCRT.cmake

@@ -66,15 +66,6 @@ variables (LLVM_USE_CRT_DEBUG, etc) instead.")
       get_current_crt(LLVM_USE_CRT_${build}
         MSVC_CRT_REGEX
         CMAKE_CXX_FLAGS_${build})
-
-      # Make /MT the default in Release builds to make them faster
-      # and avoid the DLL function thunking.
-      if ((${build} STREQUAL "MINSIZEREL") OR
-          (${build} STREQUAL "RELEASE") OR
-          (${build} STREQUAL "RELWITHDEBINFO"))
-          set(LLVM_USE_CRT_${build} "MT")
-      endif()
-
       set(LLVM_USE_CRT_${build}
         "${LLVM_USE_CRT_${build}}"
         CACHE STRING "Specify VC++ CRT to use for ${build_type} configurations."

llvm/cmake/modules/HandleLLVMOptions.cmake

@@ -381,14 +381,6 @@ if( MSVC )
   # "Enforce type conversion rules".
   append("/Zc:rvalueCast" CMAKE_CXX_FLAGS)
 
-  if (CMAKE_CXX_COMPILER_ID MATCHES "MSVC" AND NOT LLVM_ENABLE_INCREMENTAL_LINK)
-    foreach(CONFIG RELEASE RELWITHDEBINFO MINSIZEREL)
-      foreach(FLAG EXE MODULE SHARED STATIC)
-        string(REGEX REPLACE "[-/](INCREMENTAL:YES|INCREMENTAL:NO|INCREMENTAL)" "/INCREMENTAL:NO" CMAKE_${FLAG}_LINKER_FLAGS_${CONFIG} "${CMAKE_${FLAG}_LINKER_FLAGS_${CONFIG}}")
-      endforeach()
-    endforeach()
-  endif()
-
   if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT LLVM_ENABLE_LTO)
     # clang-cl and cl by default produce non-deterministic binaries because
     # link.exe /incremental requires a timestamp in the .obj file.  clang-cl