[Bug rtl-optimization/20370] New: dead_or_predictable doesn't resize reg_n_info

[Bug rtl-optimization/20370] New: dead_or_predictable doesn't resize reg_n_info

[amylaar at gcc dot gnu dot org]

dead_or_predictable calls propagate_block without checking first if there
is suddicient space in reg_n_info.  That can lead to memory corruption.

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           Summary: dead_or_predictable doesn't resize reg_n_info
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Keywords: wrong-code, ice-on-valid-code
          Severity: normal
          Priority: P2
         Component: rtl-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: amylaar at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
OtherBugsDependingO 17652
             nThis:


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20370

[Bug rtl-optimization/20370] dead_or_predictable doesn't resize reg_n_info

[amylaar at gcc dot gnu dot org]

------- Additional Comments From amylaar at gcc dot gnu dot org  2005-03-07 21:32 -------
Created an attachment (id=8356)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8356&action=view)
proposed fix


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20370

[Bug rtl-optimization/20370] dead_or_predictable doesn't resize reg_n_info

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
OtherBugsDependingO|17652                       |
              nThis|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20370

[Bug rtl-optimization/20370] dead_or_predictable doesn't resize reg_n_info

[amylaar at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2005-
                   |                            |07/msg01148.html
           Keywords|                            |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20370

[Bug rtl-optimization/20370] dead_or_predictable doesn't resize reg_n_info

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-07-18 14:57 -------
Subject: Bug 20370

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	sh-elf-4_1-branch
Changes by:	amylaar@gcc.gnu.org	2005-07-18 14:57:06

Modified files:
	gcc            : ChangeLog loop.c cse.c calls.c ifcvt.c 

Log message:
	2005-07-15  J"orn Rennecke <joern.rennecke@st.com>
	
	cvs update -j1.531 -j1.530 loop.c
	Re-apply this patch:
	2005-05-30  Pat Haugen  <pthaugen@us.ibm.com>
	* loop.c (loop_invariant_p, valid_initial_value_p): Use
	regs_invalidated_by_call instead of call_used_regs.
	
	2005-07-15  J"orn Rennecke <joern.rennecke@superh.com>
	
	PR rtl-optimization/18992
	http://gcc.gnu.org/ml/gcc-patches/2005-07/msg01140.html
	Back out this patch:
	2003-10-08  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
	PR optimization/12142
	* cse.c (count_reg_usage): In a SET with a REG SET_DEST, count the
	uses of the register in the SET_SRC.  Remove unnecessary argument.
	
	Replace it with this:
	* cse.c (count_reg_usage): In INSN, JUMP_INSN and CALL_INSN cases,
	if flag_non_call_exceptions is set and the insn may trap, pass
	pc_rtx as dest for recursion.
	In SET_SRC part of SET case, if dest is already set, pass it down
	unchanged.
	
	2005-07-15  J"orn Rennecke <joern.rennecke@superh.com>
	
	PR rtl-optimization/21848
	http://gcc.gnu.org/ml/gcc-patches/2005-07/msg01142.html
	* calls.c (emit_library_call_value_1): For const functions, add
	USEs of the stack slots to CALL_INSN_FUNCTION_USAGE.
	
	2005-07-15  J"orn Rennecke <joern.rennecke@superh.com>
	
	PR rtl-optimization/20370
	http://gcc.gnu.org/ml/gcc-patches/2005-07/msg01148.html
	* ifcvt.c (dead_or_predicable): Before calling propagate_block,
	call allocate_reg_info if necessary.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=2.8142.2.23&r2=2.8142.2.24
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.525.2.2&r2=1.525.2.3
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cse.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.351.2.1&r2=1.351.2.2
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/calls.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.385.2.1&r2=1.385.2.2
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ifcvt.c.diff?cvsroot=gcc&only_with_tag=sh-elf-4_1-branch&r1=1.184.2.2&r2=1.184.2.3



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20370

[Bug rtl-optimization/20370] dead_or_predictable doesn't resize reg_n_info

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-20 22:23 -------
Confirmed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-07-20 22:23:44
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20370

[Bug rtl-optimization/20370] dead_or_predictable doesn't resize reg_n_info

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-07-22 12:25 -------
Subject: Bug 20370

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	amylaar@gcc.gnu.org	2005-07-22 12:25:22

Modified files:
	gcc            : ChangeLog ifcvt.c 

Log message:
	PR rtl-optimization/20370
	* ifcvt.c (dead_or_predicable): Before calling propagate_block,
	call allocate_reg_info if necessary.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9518&r2=2.9519
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ifcvt.c.diff?cvsroot=gcc&r1=1.193&r2=1.194



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20370

[Bug rtl-optimization/20370] dead_or_predictable doesn't resize reg_n_info

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-22 17:21 -------
Fixed.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.1.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20370