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CMake: use VS2019's flag for stronger inlining

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Use the new "/Ob3" flag introduced in VS2019 to increase the inline
level, which may give better performance. For compilers older than
VS2019, we still use the traditional "/Ob2" inline level.

Official documentation:
https://learn.microsoft.com/en-us/cpp/build/reference/ob-inline-function-expansion?view=msvc-170

Change-Id: I34a50f27a151cb7c09f0085dd037a385c71848aa
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
This commit is contained in:
Yuhang Zhao 2023-05-23 15:59:24 +08:00 committed by Yuhang Zhao
parent 44cfdfa7c0
commit 51becfbd23
1 changed files with 2 additions and 2 deletions
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4
cmake/QtCompilerOptimization.cmake
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@ -92,10 +92,10 @@ endif()
# Windows MSVC
if(MSVC)
set(QT_CFLAGS_OPTIMIZE "-O2")
set(QT_CFLAGS_OPTIMIZE "-O2 -Ob3") # -Ob3 was introduced in Visual Studio 2019 version 16.0
set(QT_CFLAGS_OPTIMIZE_DEBUG "-Od")
set(QT_CFLAGS_OPTIMIZE_SIZE "-O1")
set(QT_CFLAGS_OPTIMIZE_VALID_VALUES "/O2" "/O1" "/Od" "/Ob0" "/Ob1" "/Ob2" "/O0" "-O0")
set(QT_CFLAGS_OPTIMIZE_VALID_VALUES "/O2" "/O1" "/Od" "/Ob0" "/Ob1" "/Ob2" "/Ob3" "/O0" "-O0")
if(CLANG)
set(QT_CFLAGS_OPTIMIZE_FULL "/clang:-O3")