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[Bug tree-optimization/48988] [4.7 regression] ICE at pred_chain_length_cmp at tree-ssa-uninit.c:1624

From: "xinliangli at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
To: gcc-bugs at gcc dot gnu dot org
Date: Sat, 21 May 2011 17:25:03 +0000
Subject: [Bug tree-optimization/48988] [4.7 regression] ICE at pred_chain_length_cmp at tree-ssa-uninit.c:1624
Auto-submitted: auto-generated
References: <bug-48988-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48988

davidxl <xinliangli at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |xinliangli at gmail dot com

--- Comment #4 from davidxl <xinliangli at gmail dot com> 2011-05-21 17:13:22 UTC ---
(In reply to comment #3)
> To reproduce on Linux, in the build dir:
> 
>   cp gcc/ada/rts/system.ads .
>   chmod a+w system.ads
>   edit system.ads and change ZCX_By_Default to False
>   gcc/gnat1 gcc/ada/rts/g-catiio.adb -Igcc/ada/rts -Wall -O
> 
> This breaks the compiler on all SJLJ platforms, e.g. arm-linux.


On x86_linux, I can not reproduce the problem:

Using the test case, got the following:

GNAT.CALENDAR.TIME_IO.AM_PM GNAT.CALENDAR.TIME_IO.HOUR_12
GNAT.CALENDAR.TIME_IO.IMAGE GNAT.CALENDAR.TIME_IO.IMAGE
GNAT.CALENDAR.TIME_IO.IMAGE GNAT.CALENDAR.TIME_IO.IMAGE.PAD_CHAR
GNAT.CALENDAR.TIME_IO.IMAGE GNAT.CALENDAR.TIME_IO.IMAGE
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B96B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B107B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B118B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B129B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B140B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B151B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B162B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B173B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B184B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B195B
GNAT.CALENDAR.TIME_IO.IMAGE.B_2.B224B GNAT.CALENDAR.TIME_IO.IMAGE.B_2.B239B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B250B GNAT.CALENDAR.TIME_IO.IMAGE.B_3.B282B
GNAT.CALENDAR.TIME_IO.IMAGE.B_3.B295B GNAT.CALENDAR.TIME_IO.IMAGE.B_3.B308B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B319B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B342B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B359B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B376B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B392B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B408B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B420B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B432B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B444B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B455B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B478B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B489B
GNAT.CALENDAR.TIME_IO.IMAGE.B_4.B500B GNAT.CALENDAR.TIME_IO.IMAGE.B_5.B511B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B522B GNAT.CALENDAR.TIME_IO.IMAGE.B_6.B534B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B545B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B558B
GNAT.CALENDAR.TIME_IO.MONTH_NAME_TO_NUMBER GNAT.CALENDAR.TIME_IO.VALUE
GNAT.CALENDAR.TIME_IO.VALUE.EXTRACT_DATE
GNAT.CALENDAR.TIME_IO.VALUE.EXTRACT_TIME GNAT.CALENDAR.TIME_IO.PUT_TIME
GNAT.CALENDAR.TIME_IO.PUT_TIME GNAT.CALENDAR.TIME_IO
Analyzing compilation unit
Performing interprocedural optimizations
 <*free_lang_data> <visibility> <early_local_cleanups> <whole-program>
<ipa-profile> <inline> <pure-const> <static-var>Assembling functions:
 GNAT.CALENDAR.TIME_IO.PUT_TIME GNAT.CALENDAR.TIME_IO.HOUR_12
GNAT.CALENDAR.TIME_IO.MONTH_NAME_TO_NUMBER
GNAT.CALENDAR.TIME_IO.VALUE.EXTRACT_TIME GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B96B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B107B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B118B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B129B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B140B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B151B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B162B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B173B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B184B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B195B GNAT.CALENDAR.TIME_IO.IMAGE.B_2.B224B
GNAT.CALENDAR.TIME_IO.IMAGE.B_2.B239B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B250B
GNAT.CALENDAR.TIME_IO.IMAGE.B_3.B282B GNAT.CALENDAR.TIME_IO.IMAGE.B_3.B295B
GNAT.CALENDAR.TIME_IO.IMAGE.B_3.B308B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B319B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B342B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B359B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B376B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B392B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B408B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B420B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B432B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B444B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B455B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B478B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B489B GNAT.CALENDAR.TIME_IO.IMAGE.B_4.B500B
GNAT.CALENDAR.TIME_IO.IMAGE.B_5.B511B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B522B
GNAT.CALENDAR.TIME_IO.IMAGE.B_6.B534B GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B545B
GNAT.CALENDAR.TIME_IO.IMAGE.L_1.B558B GNAT.CALENDAR.TIME_IO.IMAGE
GNAT.CALENDAR.TIME_IO.AM_PM GNAT.CALENDAR.TIME_IO.IMAGE
GNAT.CALENDAR.TIME_IO.IMAGE GNAT.CALENDAR.TIME_IO.IMAGE
GNAT.CALENDAR.TIME_IO.IMAGE
raised STORAGE_ERROR : stack overflow (or erroneous memory access)

References:
- [Bug ada/48988] New: powerpc-rtems ICE pred_chain_length_cmp at tree-ssa-uninit.c:1624
  - From: joel at gcc dot gnu.org

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