fixes dhrystone compile options

benchmarks/dhrystone/CMakeLists.txt

@@ -2,12 +2,21 @@ cmake_minimum_required(VERSION 3.21)
 project(dhrystone C)
 set(TARGET dhrystone)
 
-set(ITERATIONS 50000)
+set(ITERATIONS 50000 CACHE STRING "")
+set(FREQ 100e6 CACHE STRING "")
+
+set(CMAKE_C_FLAGS_RELEASE -O3)
 
 add_executable(${TARGET} dhry_1.c dhry_2.c dhry_stubs.c)
 target_include_directories(${TARGET} PRIVATE ${CMAKE_CURRENT_LIST_DIR})
-target_compile_options(${TARGET} PRIVATE -fno-inline -fno-builtin-printf -fno-common -Wno-implicit -funroll-loops -fpeel-loops -fgcse-sm -fgcse-las)
-target_compile_definitions(${TARGET} PRIVATE ITERATIONS=${ITERATIONS} HZ=32768 TIME NO_INIT)
+target_compile_options(${TARGET} PRIVATE 
+        -Wno-implicit -fno-builtin-printf 
+        -finline -fno-common -funroll-loops -fpeel-loops 
+        -finline-functions -finline-limit=1000
+        -fgcse-sm -fgcse-las 
+        -falign-functions=16 -falign-jumps=4 -falign-loops=4 
+        -freorder-blocks-and-partition -fno-if-conversion2 -fno-crossjumping)
+target_compile_definitions(${TARGET} PRIVATE ITERATIONS=${ITERATIONS} HZ=${FREQ} TIME NO_INIT)
 
 set(BOARD "iss" CACHE STRING "Target board")
 add_subdirectory(../../bare-metal-bsp bsp)
@@ -17,3 +26,4 @@ target_link_options(${TARGET} PRIVATE LINKER:-Map=${TARGET}.map -Wl,--wrap=scanf
 add_custom_command(TARGET ${TARGET} POST_BUILD
         COMMAND ${CMAKE_OBJDUMP} -S ${TARGET}.elf > ${TARGET}.dis
         COMMENT "Creating disassembly for ${TARGET}")
+#[I] [         6.005415 ms] tb                      : tohost send 'Dhrystones per Second:                      219735.7 '