[Bug target/42031] New: Thumb2 ICE - spill failure.

[ramana at gcc dot gnu dot org]

The patch here http://gcc.gnu.org/ml/gcc-patches/2009-11/msg00515.html breaks
CSibe builds at Os for thumb2. I've attached a reduced testcase with this bug
report. This was reduced from linux-2.4.23/fs/nfs/read.c .

Building with -fno-schedule-insns works. 

Command Line options used -mcpu=cortex-a8 -mthumb -Os.


besttry.c:75:1: error: unable to find a register to spill in class 'LO_REGS'
besttry.c:75:1: error: this is the insn:
(insn 28 32 29 3 besttry.c:52 (parallel [
            (set (reg:DI 162)
                (plus:DI (zero_extend:DI (reg:SI 161 [ req_6(D)->wb_offset ]))
                    (reg:DI 173 [orig:158 D.2071 ] [158])))
            (clobber (reg:CC 24 cc))
        ]) 3 {*adddi_zesidi_di} (expr_list:REG_DEAD (reg:SI 161 [
req_6(D)->wb_offset ])
        (expr_list:REG_UNUSED (reg:CC 24 cc)
            (expr_list:REG_EQUIV (mem/s:DI (reg:SI 133 [ D.2071 ]) [7
0B->args.offset+0 S8 A64])
                (nil)))))
besttry.c:75:1: internal compiler error: in spill_failure, at reload1.c:2141
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


-- 
           Summary: Thumb2 ICE - spill failure.
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ramana at gcc dot gnu dot org
 GCC build triplet: x86_64-linux
  GCC host triplet: x86_64 linux gnu
GCC target triplet: arm-eabi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42031