[Bug c/35426] New: GCC 4.3.0 ICE on valid code in init2.c

["lloyd at randombit dot net" <gcc-bugzilla at gcc dot gnu dot org>]

A simple C source fails with an ICE with 4.3.0 (the 20070907 and 20080228
snapshots) with optimizations (-O1/-O2/-Os -- I haven't narrowed it down to
which exact optimization though). This machine is x86-64 but the same assertion
occurs targeting both x86-64 (-m64) and x86 (-m32). Fedora Core 5 machine,
system binutils 2.6.91.0.6. Same file compiles and executes with optimizations
with GCC 4.1.1

$ gcc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.3-20080228/configure --prefix=/home/jack/opt
--with-mpfr=/home/jack/opt
Thread model: posix
gcc version 4.3.0 20080228 (prerelease) (GCC) 

$ gcc -O2 speed.c -lm -o speed
init2.c:38:  assertion failed: ((32 - 0)+0) == (((32 - 0)+0)/8) * 8 &&
sizeof(mp_limb_t) == (((32 - 0)+0)/8)
speed.c: In function ?main?:
speed.c:16: internal compiler error: Aborted
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
distcc[28444] ERROR: compile speed.c on localhost failed

The file in question is simple enough that I'm definitely thinking this may be
a build issue - it looks like any code calling libm functions fails with this
problem? It doesn't appear to be anything in FC5's math.h; removing the include
of math.h and explicitly declaring pow() had no effect.


-- 
           Summary: GCC 4.3.0 ICE on valid code in init2.c
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: lloyd at randombit dot net
 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=35426