The following code compiles successfully under gcc-3.4.3 on amd64:
> cat bug.C
float foo();
int _numTransitions;
int _offset;
void
bar(int &base)
{
float tmp = foo();
tmp -= (float)_offset;
if (tmp < 0.0) tmp = 0.0;
if (tmp > (float)(_numTransitions-1))
tmp = (float)(_numTransitions-1);
base = (int) tmp;
}
> /dept/rnd/vendor/gcc-4.0.0-amd64/bin/g++ -fnon-call-exceptions -fPIC -O2 -c
bug.C -o /dev/null
bug.C: In function 'void bar(int&)':
bug.C:15: error: insn does not satisfy its constraints:
(insn 67 35 36 0 (set (reg:SF 24 xmm3)
(lt:SF (reg/v:SF 22 xmm1 [orig:60 tmp ] [60])
(reg:SF 23 xmm2 [65]))) 487 {*sse_setccsf} (nil)
(nil))
bug.C:15: internal compiler error: in reload_cse_simplify_operands, at
postreload.c:391
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
> /dept/rnd/vendor/gcc-4.0.0-amd64/bin/g++ -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.0.0/configure
--prefix=/dept/rnd/vendor/gcc-4.0.0-amd64 --enable-threads
--enable-languages=c,c++
Thread model: posix
gcc version 4.0.0
--
Summary: [4.0 regression] ICE in reload_cse_simplify_operands
with -fnon-call-exceptions -fPIC -O2
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: nick at ilm dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21169
