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SH: 2.95.2/.3 miscompiles function
- From: "Schirmer, Hartmut" <HSchirmer at Innovative-Systems dot de>
- To: "'gcc-bugs at gcc dot gnu dot org'" <gcc-bugs at gcc dot gnu dot org>
- Date: Fri, 17 May 2002 13:16:50 +0200
- Subject: SH: 2.95.2/.3 miscompiles function
Hi,
the test case below triggers a bug in gcc 2.95.2 & 2.95.3
for sh-hitachi-coff (cross from cygwin / nt4)
The bug only occurs with -Os
Using gcc 3.1 the code looks ok
Hartmut
/*
This testcase fails for sh-hitachi-coff
using gcc-2.95.2/.3 -mrelax -m3 -ansi -g -Os -fno-keep-static-consts
-fno-strict-aliasing -fno-gcse
test() is miscompiled:
mov.l L4,r1 // load 32678 to r1
cmp/eq #1,r0
bf.s L3
mov r15,r14
sts macl,r1 // reading macl without mul ...
L3:
*/
long test (int bar)
{
long r;
r = 32768;
if ( 1 == bar )
{
r *= 8;
}
return r;
}
int main()
{
if ( 32768 != test(0) )
abort();
if ( 32768*8 != test(1) )
abort();
return 0;
}