http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52437
Bug #: 52437 Summary: internal compiler error: in spill_failure, at reload1.c:2120 Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassig...@gcc.gnu.org ReportedBy: reg...@cs.utah.edu CC: cheny...@cs.utah.edu [regehr@gamow 0]$ current-gcc -v Using built-in specs. COLLECT_GCC=current-gcc COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r184628-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.7.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../configure --with-libelf=/usr/local --enable-lto --prefix=/home/regehr/z/compiler-install/gcc-r184628-install --program-prefix=r184628- --enable-languages=c,c++ Thread model: posix gcc version 4.7.0 20120228 (experimental) (GCC) [regehr@gamow 0]$ current-gcc small.c -c -O3 small.c: In function 'fn1': small.c:13:1: error: unable to find a register to spill in class 'FLOAT_REGS' small.c:13:1: error: this is the insn: (insn 10 33 12 2 (set (reg:V4SI 76 [ vect_var_.17 ]) (vec_merge:V4SI (vec_duplicate:V4SI (const_int 1 [0x1])) (reg:V4SI 76 [ vect_var_.17 ]) (const_int 1 [0x1]))) small.c:10 1393 {vec_setv4si_0} (expr_list:REG_EQUAL (const_vector:V4SI [ (const_int 1 [0x1]) (const_int -1 [0xffffffffffffffff]) (const_int -1 [0xffffffffffffffff]) (const_int -1 [0xffffffffffffffff]) ]) (nil))) small.c:13:1: internal compiler error: in spill_failure, at reload1.c:2120 Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. [regehr@gamow 0]$ cat small.c int **f, g, i, j; void fn1 () { for (;;) { j = (fn2 (), 0) | 1; i = 0; for (; i <= 3; i += 1) { g = 1; for (; g >= 0; g -= 1) 0 == (f = 0) & (j &= 0xB); } } }