2015-12-17, 04:14 PM
Sample program test.bas:
Compiling it using -O2 works correctly and produces the following code for routine proc2:
Compiling it using -O3 produces error "Relative jump out of range" and produces the following code for routine proc2:
Again, the optimizer is supposed to try to optimize its own generated code only, not someone else's assembly code!
Code:
GOTO 10
sub FASTCALL proc1()
asm
start:
ld hl,(stuff)
ld (23672),hl
ret
stuff:
defw 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
defw 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
defw 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
defw 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
end asm
end sub
sub FASTCALL proc2(a AS UBYTE)
asm
cp 10
jr nz, skip
dec a
skip:
jp start
end asm
end sub
10 proc1()
proc2(0)Compiling it using -O2 works correctly and produces the following code for routine proc2:
Code:
_proc2:
#line 17
cp 10
jr nz, skip
dec a
skip:
jp start
#line 22
_proc2__leave:
retCompiling it using -O3 produces error "Relative jump out of range" and produces the following code for routine proc2:
Code:
_proc2:
#line 17
cp 10
jr nz, start
dec a
skip:
jp start
#line 22
_proc2__leave:
retAgain, the optimizer is supposed to try to optimize its own generated code only, not someone else's assembly code!