[Bug rtl-optimization/15921] New: [3.5 Regression] gcc.c-torture/compile/920501-4.c fails on powerpc-*

[pinskia at gcc dot gnu dot org]

/Users/regress/tbox/cvs-gcc/gcc/gcc/testsuite/gcc.c-torture/compile/920501-4.c: In function `foo':
^M
/Users/regress/tbox/cvs-gcc/gcc/gcc/testsuite/gcc.c-torture/compile/920501-4.c:53: error: insn 
does not satisfy its constraints:^M
(insn 171 169 173 0 (parallel [^M
            (set (reg:SI 6 r6 [186])^M
                (lshiftrt:SI (neg:SI (abs:SI (reg/v:SI 0 r0 [orig:132 m_max ] [132])))^M
                    (const_int 31 [0x1f])))^M
            (clobber (reg:SI 0 r0))^M
        ]) 419 {*ne0} (nil)^M
    (nil))^M
Could have been caused by:

+2004-05-25  Vladimir Makarov  <vmakarov@redhat.com>
+
+	* global.c (global_alloc): Call make_accurate_live_analysis.
+	(record_one_conflict): Remove dead code.
+	(mark_reg_clobber): Remove ATTRIBUTE_UNUSED for parameter data.
+	(bb_info): New structure.
+	(BB_INFO, BB_INFO_BY_INDEX): New macros.
+	(allocate_bb_info, free_bb_info, mark_reg_change,
+	calculate_local_reg_bb_info, set_up_bb_rts_numbers, rpost_cmp,
+	modify_bb_reg_pav, calculate_reg_pav,
+	make_accurate_live_analysis): New functions.



+2004-05-25  Paolo Bonzini  <bonzini@gnu.org>
+
+	* Makefile.in (OBJS): Add rtlhooks.o.
+	(rtlanal.o): Depend on function.h.
+	(cse.o): Depend on rtlhooks-def.h.
+	(combine.o): Depend on rtlhooks-def.h.
+	(rtlhooks.o): New rule.
+	* combine.c: Include rtlhooks-def.h.
+	(nonzero_bits, cached_nonzero_bits, nonzero_bits1,
+	num_sign_bit_copies, cached_num_sign_bit_copies,
+	num_sign_bit_copies1): Move most of the code to rtlanal.c.
+	(reg_nonzero_bits_for_combine,
+	reg_num_sign_bit_copies_for_combine): New functions holding
+	the remnants of the above.
+	(combine_rtl_hooks): New.
+	(combine_instructions): Set rtl_hooks instead of gen_lowpart.
+	* cse.c: Include rtlhooks-def.h.
+	(cse_rtl_hooks): New.
+	(cse_main): Set rtl_hooks instead of gen_lowpart.
+	* emit-rtl.c (gen_lowpart): Remove.
+	(gen_lowpart_general): Move to rtlhooks.c.
+	* rtl.h (nonzero_bits, num_sign_bit_copies,
+	struct rtl_hooks, rtl_hooks, general_rtl_hooks): New.
+	(gen_lowpart_general): Remove.
+	(gen_lowpart): Temporarily redefine as a macro.
+	* rtlanal.c: Include function.h.
+	(nonzero_bits, cached_nonzero_bits, nonzero_bits1,
+	num_sign_bit_copies, cached_num_sign_bit_copies,
+	num_sign_bit_copies1): New, from combine.c.
+	* rtlhooks.c: New file. 
+

-- 
           Summary: [3.5 Regression] gcc.c-torture/compile/920501-4.c fails
                    on powerpc-*
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: critical
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org
                CC: bonzini at gcc dot gnu dot org,gcc-bugs at gcc dot gnu
                    dot org,vmakarov at gcc dot gnu dot org
GCC target triplet: powerpc-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15921