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[Bug rtl-optimization/49472] [4.7 regression] Compiler segfault on valid code
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 20 Jun 2011 11:54:46 +0000
- Subject: [Bug rtl-optimization/49472] [4.7 regression] Compiler segfault on valid code
- Auto-submitted: auto-generated
- References: <bug-49472-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49472
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|fortran |rtl-optimization
Target Milestone|--- |4.7.0
Summary|[gfortran, 4.7 regression] |[4.7 regression] Compiler
|Compiler segfault on valid |segfault on valid code
|code |
--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-06-20 11:54:44 UTC ---
We endlessly recurse simplifying from fwprop
#20152 0x0000000001169de1 in propagate_rtx_1 (px=0x7fffffffd940,
old_rtx=0x7ffff5b3f7a0, new_rtx=0x7ffff5b48ba0, flags=6)
at /space/rguenther/src/svn/trunk/gcc/fwprop.c:507
507 tem = simplify_gen_binary (code, mode, op0, op1);
(gdb) down
#20151 0x0000000000b0f51e in simplify_gen_binary (code=MULT, mode=DFmode,
op0=0x7ffff5b48bd0, op1=0x7ffff5b48ba0)
at /space/rguenther/src/svn/trunk/gcc/simplify-rtx.c:117
117 tem = simplify_binary_operation (code, mode, op0, op1);
(gdb) call debug_rtx (op0)
(mult:DF (mult:DF (div:DF (reg:DF 80 [ D.1612 ])
(reg:DF 123))
(neg:DF (div:DF (const_double:DF 1.0e+0 [0x0.8p+1])
(reg:DF 103 [ powroot.4 ]))))
(reg:DF 82 [ D.1613 ]))
(gdb) call debug_rtx (op1)
(div:DF (reg:DF 80 [ D.1612 ])
(reg:DF 123))