[Bug target/13949] New: illigal code

[Bug target/13949] New: illigal code

[ysato at users dot sourceforge dot jp]

Code corresponding to "nr & 7" is not generate.
It is evaluated as 1UL << nr.

build options -mh -mint32 -O2

- test code -
static inline int test(int nr, void *addr)
{
	return ((*((unsigned char *)addr + ((nr >> 3) ^ 3)) & (1UL << (nr & 7))) != 0);
}

int main(void)
{
	unsigned long array[10];
	int c;
	for (c = 0; c < sizeof(array)*8; c++)
		if (test(c,array))
			break;
}

- output -
	.file	"test.c"
	.h8300h
	.section .text
	.align 1
	.global _main
_main:
	mov.l	er6,@-er7
	mov.l	er7,er6
	add.l	#-40,er7
	sub.l	er3,er3
	mov.l	er6,er0
	add.l	#-40,er0
.L7:
	mov.l	er3,er2
	shar.l	er2
	shar.l	er2
	shar.l	er2
	xor	#3,r2l
	add.l	er0,er2
	btst	r3l,@er2
	bne	.L3
	adds	#1,er3
	cmp.l	#319,er3
	bls	.L7
.L3:
	add.l	#40,er7
	mov.l	@er7+,er6
	rts
	.size	_main, .-_main
	.end
	.ident	"GCC: (GNU) 3.4.0 20040131 (prerelease)"

-- 
           Summary: illigal code
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ysato at users dot sourceforge dot jp
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: h8300-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13949

[Bug target/13949] illigal code

[kazu at cs dot umass dot edu]

------- Additional Comments From kazu at cs dot umass dot edu  2004-01-31 17:19 -------
Assigning to me to...

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kazu at cs dot umass dot edu
         AssignedTo|unassigned at gcc dot gnu   |kazu at cs dot umass dot edu
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13949

[Bug target/13949] illigal code

[kazu at cs dot umass dot edu]

------- Additional Comments From kazu at cs dot umass dot edu  2004-01-31 17:21 -------
btst instruction on H8/300 only uses the lowest three bits to specify
the bit location, so an explicit "& 7" is not needed.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13949

[Bug target/13949] illigal code

[ysato at users dot sourceforge dot jp]

------- Additional Comments From ysato at users dot sourceforge dot jp  2004-02-01 13:50 -------
I'm sorry it was a misunderstanding.
There is not a problem.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |VERIFIED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13949