SuperH target not emitting instructions to use frame pointer?
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Hello everyone, Version: GCC 4.3.6 Target: sh OS: GNU/Linux Flags passed to GCC configure: --enable-frame-pointer --disable-cld --disable-initfini-array --disable-largefile --disable-libstdcxx-pch --disable-multilib --disable-multilib --disable-nls --disable-objc-gc --disable-rpath --disable-shared --disable-threads --disable-tls --disable-win32-registry --enable-decimal-float=no --enable-languages=c,c++ --enable-static --program-prefix="sh-elf-" --target="sh-elf" --with-gcc --with-gnu-as --with-gnu-ld --with-newlib On this architecture, the r14 register is considered to be the frame pointer register. The "pr" register is the procedure register that holds the return address. The "JSR" appropriately sets the "pr" register while "JMP" or any of the branch instructions do not. The flags I've used to compile my binaries (no ELF executables): -O2 -fno-omit-frame-pointer Seeing above that I passed '--enable-frame-pointer', GCC still does not use the frame pointer. I even when in and enabled the C preprocessor macro, SUBTARGET_FRAME_POINTER_REQUIRED which forces FRAME_POINTER_REQUIRED to return TRUE. I didn't use the machine-description macro FRAME_POINTER_REQUIRED. Could that also be it? Where would I set this? The ONLY way it works is if EVERY function has the following attribute: '__attribute__((optimize("-fno-omit-frame-pointer")))', but I MUST use the -O2 optimization level or else the frame pointer will not be used again. Am I missing something important here? I would simply like to have -fomit-frame-pointer and -fno-frame-pointer work as expected.