[Bug target/40934] [4.5 Regression] ICE in get_hard_regnum, at reg-stack.c:741

["ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #6 from ubizjak at gmail dot com  2009-08-01 22:38 -------
(In reply to comment #5)

> (jump_insn:TI 52 50 56 11 test.c:32 (parallel [
>             (set (pc)
>                 (if_then_else (le (reg/v:SF 9 st(1) [orig:64 move ] [64])
>                         (reg:SF 8 st [80]))
>                     (label_ref:SI 60)
>                     (pc)))
>             (clobber (reg:CCFP 18 fpsr))
>             (clobber (reg:CCFP 17 flags))
>             (clobber (reg:HI 0 ax))
>         ]) 626 {*fp_jcc_3_387} (expr_list:REG_DEAD (reg/v:SF 9 st(1) [orig:64
> move ] [64])

This instruction should be split waaay before reg-stack. The problem was
probably introduced by the patch below:

2009-06-28  Paolo Bonzini  <bonzini@gnu.org>

        * config/i386/i386.h (enum ix86_fpcmp_strategy): New.
        * config/i386/i386.md (cbranchxf4, cstorexf4, cbranch<MODEF>4,
        cstore<MODEF>4, mov<X87MODEF>cc): Change predicate to
        ix86_fp_comparison_operator.
        (*fp_jcc_1_mixed, *fp_jcc_1_sse, *fp_jcc_1_387, *fp_jcc_2_mixed,
        *fp_jcc_2_sse, *fp_jcc_2_387): Delete
        (*fp_jcc_3_387, *fp_jcc_4_387, *fp_jcc_5_387, *fp_jcc_6_387,
        *fp_jcc_7_387, *fp_jcc_8<MODEF>_387): Eliminate call to
        !ix86_use_fcomi_compare, change ix86_fp_jump_nontrivial_p call
        to !TARGET_CMOVE, change predicate to ix86_fp_comparison_operator.
        (related splits): Change predicate to ix86_fp_comparison_operator.
        * config/i386/predicates.md: Use ix86_trivial_fp_comparison_operator
        instead of ix86_fp_comparison_codes.
        ...

Let's ask Paolo.


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bonzini at gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40934