Re: genmatch infinite loop during bootstrap on AIX

[David Edelsohn <dje.gcc@gmail.com>]

It may be fallout from Maxim's scheduler patch.  I'm testing that.
Backing up before Maxim's patch and your genmatch patch does not enter
an endless loop.

- David

On Sat, Oct 25, 2014 at 4:06 AM, Richard Biener <rguenther@suse.de> wrote:
> On October 25, 2014 1:33:39 AM CEST, David Edelsohn <dje.gcc@gmail.com> wrote:
>>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
>
> Does it really hang in libstdc++ or does it loop somewhere in genmatch? Is this stage1 or later?
>
> Does this happen only after the 2nd part of the merge went in? That is, what revision?
>
> Thanks,
> Richard.
>
>>#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
>
>