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[Bug c/35860] New: code bloat caused by -fsplit-wide-types
- From: "a dot kaiser at gmx dot net" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Apr 2008 21:35:58 -0000
- Subject: [Bug c/35860] New: code bloat caused by -fsplit-wide-types
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
Command:
avr-gcc -O1 -S div32_7.c
or
avr-gcc -O1 -fno-split-wide-types -S div32_7.c
Code size 4.1.2: 0x28
Code size 4.3.0: 0x68
Code size 4.3.0: 0x28 with -fno-split-wide-types
//----------------
unsigned long udivr32_7( unsigned long a, unsigned char b, unsigned char *r )
{
unsigned char i, t;
for( t = 0, i = 32; i ; i-- ){
t += t;
if( a & 0x80000000UL )
t++;
a += a;
if( t >= b ){
t -= b;
a |= 1;
}
}
*r = t;
return a;
}
//----------------
--
Summary: code bloat caused by -fsplit-wide-types
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: a dot kaiser at gmx dot net
GCC host triplet: winavr 20080402 release
GCC target triplet: avr
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35860