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Date: Fri, 24 Oct 2014 23:37:00 -0000
Message-ID: <CAGWvnykRi9tjw4VPpArRaDYYMZvwxjvYt_oqDGMhjmataTLKJA@mail.gmail.com>
Subject: genmatch infinite loop during bootstrap on AIX
From: David Edelsohn <dje.gcc@gmail.com>
To: Richard Biener <rguenther@suse.de>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>
Content-Type: text/plain; charset=ISO-8859-1
X-SW-Source: 2014-10/txt/msg02609.txt.bz2

genmatch is hanging when bootstrapping on AIX (gcc111).  When I attach
to the process:

#0  0x1007efac in std::basic_string<char, std::char_traits<char>,
std::allocator<char> >::basic_string ()
#1  0x1000e6b0 in _ZN6parser13parse_captureEP7operand (this=0x300594b8, op=0x0)
    at /home/dje/src/src/gcc/genmatch.c:2607
#2  0x1000e9f0 in _ZN6parser10parse_exprEv (this=0x2ff20208)
    at /home/dje/src/src/gcc/genmatch.c:2669
#3  0x1000ee38 in _ZN6parser8parse_opEv (this=0x2ff20208)
    at /home/dje/src/src/gcc/genmatch.c:2728
#4  0x1000efc4 in
_ZN6parser14parse_simplifyEjR3vecIP8simplify7va_heap6vl_ptrEP12predicate_idP4expr
(this=0x2ff20208, match_location=4614, simplifiers=...,
    matcher=0x0, result=0x0) at /home/dje/src/src/gcc/genmatch.c:2792
#5  0x100102fc in _ZN6parser13parse_patternEv (this=0x2ff20208)
    at /home/dje/src/src/gcc/genmatch.c:3052
#6  0x10010c0c in _ZN6parser9parse_forEj (this=0x2ff20208)
    at /home/dje/src/src/gcc/genmatch.c:2991
#7  0x10010350 in _ZN6parser13parse_patternEv (this=0x2ff20208)
    at /home/dje/src/src/gcc/genmatch.c:3090
#8  0x1001122c in _ZN6parserC2EP10cpp_reader (this=0x2ff20208, r_=0x3003bbec)
    at /home/dje/src/src/gcc/genmatch.c:3122
#9  0x10004acc in main (argc=<error reading variable>,
    argv=<error reading variable>) at  _start_ :3204