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Re: genmatch infinite loop during bootstrap on AIX

Bootstrap succeeds with Maxim's patch (r216624).

The other, significant changes I see on trunk between r216624 and r216674 are:

match-and-simplify through r216632
ipc-icf in r216662
libstdc++ in r216667

No other patches to trunk *seem* like they should affect PPC bootstrap.

- David

On Sat, Oct 25, 2014 at 10:04 AM, David Edelsohn <> wrote:
> 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 <> wrote:
>> On October 25, 2014 1:33:39 AM CEST, David Edelsohn <> 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,
>>>    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
>>>(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,
>>>    at /home/dje/src/src/gcc/genmatch.c:3122
>>>#9  0x10004acc in main (argc=<error reading variable>,
>>>    argv=<error reading variable>) at  _start_ :3204

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