Introduce an -fpeel-loops flag for GCC build.

This improves performance of scalar-optimized code by 1.5 times as well as fixes gost-engine#433.
marcfedorow · May 24, 2024 · a55e233 · a55e233
1 parent ede3886
commit a55e233
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -31,9 +31,9 @@ if (CMAKE_C_COMPILER_ID MATCHES "Clang")
   set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O2 -ggdb")
   add_compile_options(-Werror -Wall -Wno-unused-parameter -Wno-unused-function -Wno-missing-braces -Qunused-arguments -Wno-deprecated-declarations)
 elseif(CMAKE_C_COMPILER_ID MATCHES "GNU")
-  set(CMAKE_C_FLAGS_RELEASE -O2)
+  set(CMAKE_C_FLAGS_RELEASE "-O2 -fpeel-loops")
   set(CMAKE_C_FLAGS_DEBUG "-O0 -ggdb")
-  set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O2 -ggdb")
+  set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O2 -fpeel-loops -ggdb")
   add_compile_options(-Werror -Wall -Wno-unused-parameter -Wno-unused-function -Wno-missing-braces -Wno-error=unknown-pragmas -Wno-error=pragmas -Wno-deprecated-declarations)
 elseif(CMAKE_C_COMPILER_ID MATCHES "MSVC")
   add_definitions(-D_CRT_SECURE_NO_WARNINGS)