Do away with memcpy/memset/memcmp

Now everything is either explicitly a rep thing, or explicitly some
other small run of reasonably efficient instructions. No library calls
or function call overhead of any kind. Code size remains nice and small.

Ban a few other bad libc functions while we're at it. More can be added
later if we decide that's a useful idea.

This will require some discipline and workarounds to cope with Clang's
tendency to shove mem* calls in places you don't want them even when you
tell it not to. Well, c'est la vie.

I'm a little nervous that the __builtin_memmove() usage in shuntvars()
could still one day emit actual library calls. It appears we're not
importing memmove() from anywhere at the moment, though. So I guess it's
good enough for now.

Also I had to get rid of alloca() in con_.c but that was kind of bad
anyway, so that's fine.

1 files changed, 4 insertions, 4 deletions

diff --git a/compile.bat b/compile.bat
index 2958186..10be904 100644
--- a/compile.bat
+++ b/compile.bat
@@ -29,8 +29,8 @@ if "%dbg%"=="1" (
 	set cflags=-O0 -g3 -masm=intel -fsanitize-trap=undefined -DSST_DBG

 	set ldflags=-O0 -g3

 ) else (

-	set cflags=-O2 -masm=intel

-	set ldflags=-O2

+	set cflags=-O2 -masm=intel -ffreestanding

+	set ldflags=-O2 -ffreestanding

 )

 

 set objs=

@@ -46,8 +46,8 @@ set dmodname= -DMODULE_NAME=%basename%
 if "%dmodname%"==" -DMODULE_NAME=con_" set dmodname= -DMODULE_NAME=con

 if "%dmodname%"==" -DMODULE_NAME=sst" set dmodname=

 set objs=%objs% .build/%basename%%ext%.o

-%CC% -c -flto -mno-stack-arg-probe %cflags% %warnings% %stdflags% -I.build/include ^

--D_DLL%dmodname% -o .build/%basename%%ext%.o %1 || goto :end

+%CC% -c -flto -mno-stack-arg-probe %cflags% %warnings% %stdflags% -include src/1.h ^

+-I.build/include -D_DLL%dmodname% -o .build/%basename%%ext%.o %1 || goto :end

 goto :eof

 

 :main