I get an internal compiler error when compiling without optimizations on the
following code:
/////////////////////////////////////////////////////////
#include <emmintrin.h>
int buggy(double val1, double val2){
__m128d t1 = _mm_load_sd( &val1 );
__m128d t2 = _mm_load_sd( &val2 );
__m128d r = _mm_cmpgt_sd(t1, t2);
return _mm_cvtsd_si32(r);
}
int main(int argc, char ** argv){
return buggy(3.0, 3.8);
}
/////////////////////////////////////////////////////
The command used is:
gcc -c buggy.c -o buggy.o
and the exact error text is:
/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/include/emmintrin.h: In function
`_mm_cmpgt_sd':
/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/include/emmintrin.h:396: internal
compiler error: in instantiate_virtual_regs_lossage, at function.c:3781
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugs.gentoo.org/> for instructions.
Preprocessed source stored into /tmp/ccSdZXLX.out file, please attach this to
your bugreport.
Interestingly, adding an optimization of -O1 and up eliminates this error. I
experience the same problem with 3.4.3.
Some system info:
System uname: 2.6.12-gentoo-r6 x86_64 Intel(R) Xeon(TM) CPU 2.80GHz
Gentoo Base System version 1.6.12
sys-devel/autoconf: 2.13, 2.59-r6
sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6
sys-devel/binutils: 2.15.92.0.2-r10
sys-devel/libtool: 1.5.18-r1
virtual/os-headers: 2.6.11-r2
--
Summary: ICE in instantiate_virtual_regs_lossage on x86-64 EM64T
system
Product: gcc
Version: 3.4.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rstancha at cse dot wustl dot edu
GCC build triplet: x86_64-pc-linux-gnu
GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25583
