This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug rtl-optimization/49847] [4.7 Regression] NULL deref in fold_rtx (prev_insn_cc0 == NULL)
- From: "schwab at linux-m68k dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 23 Jan 2012 16:03:21 +0000
- Subject: [Bug rtl-optimization/49847] [4.7 Regression] NULL deref in fold_rtx (prev_insn_cc0 == NULL)
- Auto-submitted: auto-generated
- References: <bug-49847-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49847
Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Version|4.6.1 |4.7.0
Target Milestone|4.6.3 |4.7.0
Summary|[4.6/4.7 Regression] m68k |[4.7 Regression] NULL deref
|gcj-4.6 NULL deref in |in fold_rtx (prev_insn_cc0
|fold_rtx (prev_insn_cc0 == |== NULL)
|NULL) |
--- Comment #12 from Andreas Schwab <schwab@linux-m68k.org> 2012-01-23 16:03:21 UTC ---
The problem appears to be due to the exception region on a cc0 setter, which
separates it from the cc0 consumer:
(insn 4013 4012 8164 949 (set (cc0)
(compare (reg:SF 912 [ D.26269 ])
(const_double:SF -2147483648 [0x80000000] 2.147483648e+9
[0x0.8p+32]))) ../../../gcc/libjava/interpret.cc:131 -1
(expr_list:REG_EH_REGION (const_int 4 [0x4])
(nil)))
(note 8164 4013 4014 950 [bb 950] NOTE_INSN_BASIC_BLOCK)
(insn 4014 8164 4015 950 (set (reg:QI 2121)
(ge:QI (cc0)
(const_int 0 [0]))) ../../../gcc/libjava/interpret.cc:131 -1
(nil))
Happens in trunk since r180192.