Path: utzoo!utgpu!watmath!uunet!tut.cis.ohio-state.edu!relay.eu.net!tnoibbc!gvb
From: tnoibbc!gvb@relay.eu.net (Gerlach van Beinum)
Newsgroups: gnu.gcc.bug
Subject: gcc bug in long long handling on convex.
Message-ID: <8911221519.AA03447@tnoibbc>
Date: 22 Nov 89 15:19:08 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 84


	There seems to be a bug in the gcc 1.36 compiler
	The generated assembly code for type long long (64 bit int's)
	is wrong. This error is the reason we can't compile gdb
	with gcc ( gdw works when compiled with the local compiler)

	See small file below.

-----------------------------------------
long long ll = 123;

main()
{
	printf("%ld\n",(long)ll);
	printf("%LL\n",(long)ll); /* %LL is the specifier for64 bit int's */
}
---------------------------------------
Resulting .s file with Gnu compiler :


;NO_APP
gcc_compiled.:
.globl _ll
.data
.align 4
_ll:
	ds.w 123			; <===  should be in the 2nd word!
	ds.w 0
.text
LC0:
	ds.b "%ld\012\000"
.text
.align 2
.globl _main
_main:
	ld.w _ll,s0			; <== should be ld.l  !
	psh.w s0
	pshea LC0
	mov sp,ap
	calls _printf
	ld.w 12(fp),ap
	rtn
--------------------------------------
	Resulting .s file wilt convex compiler :

	.fpmode	native
LL0:
	.data
	.align	2
	.globl	_ll
_ll:
	ds.l	0x00000007b
	.text
	.globl	_main
_main:
	sub.w	#.L1,sp
	.data	1
L6:
	ds.b	"%ld\12\0"
	.text
	ld.l	_ll,s0	;70			: <=== Correct.
	;5
	psh.w	s0	;67
	pshea	L6	;67a
	mov	sp,ap
	pshea	#2
	calls	_printf	;37
	add.w	#12,sp
	ld.w	12(fp),ap
	.data	1
L7:
	ds.b	"%LL\12\0"
	.text
	ld.l	_ll,s0	;70
	psh.l	s0	;67
	pshea	L7	;67a
	mov	sp,ap
	pshea	#2
	calls	_printf	;37
	add.w	#16,sp
	ld.w	12(fp),ap
	rtn
.L1 = 0
	.data