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From: Andreas Schwab <schwab@suse.de>
To: Marek Polacek <polacek@redhat.com>
Cc: Richard Biener <richard.guenther@gmail.com>,  Jeff Law <law@redhat.com>,  GCC Patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH] Fix middle-end/67133, part 1
References: <CAFiYyc2P_d=h=QHGjoDi0uONLFbe3gmKPvcDcABwOsvSBHuZyw@mail.gmail.com>	<20150814132945.GS3335@redhat.com> <55CE002E.6000108@redhat.com>	<20150814153224.GU3335@redhat.com> <55CE0A5A.4070802@redhat.com>	<20150814195836.GB2093@redhat.com> <55CE5054.5080400@redhat.com>	<20150814204649.GC2093@redhat.com> <55D21A8D.50004@redhat.com>	<CAFiYyc3MQxXO_es3ZEPtcFGybHUxFmeovyb_1FPO6WWH-uaE+Q@mail.gmail.com>	<20150818194918.GB2729@redhat.com>
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Date: Thu, 20 Aug 2015 09:05:00 -0000
In-Reply-To: <20150818194918.GB2729@redhat.com> (Marek Polacek's message of	"Tue, 18 Aug 2015 21:49:18 +0200")
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Marek Polacek <polacek@redhat.com> writes:

> 	PR middle-end/67133
> 	* gimple-ssa-isolate-paths.c
> 	(insert_trap_and_remove_trailing_statements): Rename to ...
> 	(insert_trap): ... this.  Don't remove trailing statements; split
> 	block instead.
> 	(find_explicit_erroneous_behaviour): Don't remove all outgoing edges.

This breaks go on aarch64:

../../../libgo/go/encoding/gob/decode.go: In function ‘gob.decIgnoreOpFor.pN20_encoding_gob.Decoder’:
../../../libgo/go/encoding/gob/decode.go:843:1: internal compiler error: in operator[], at vec.h:714
 func (dec *Decoder) decIgnoreOpFor(wireId typeId) decOp {
 ^
0xac5c3b vec<edge_def*, va_gc, vl_embed>::operator[](unsigned int)
        ../../gcc/vec.h:714
0xac5c3b extract_true_false_edges_from_block(basic_block_def*, edge_def**, edge_def**)
        ../../gcc/tree-cfg.c:8456
0xace9bf gimple_verify_flow_info
        ../../gcc/tree-cfg.c:5260
0x6ea1ab verify_flow_info()
        ../../gcc/cfghooks.c:260
0xadeca3 cleanup_tree_cfg_noloop
        ../../gcc/tree-cfgcleanup.c:739
0xadeca3 cleanup_tree_cfg()
        ../../gcc/tree-cfgcleanup.c:788
0x9d21c3 execute_function_todo
        ../../gcc/passes.c:1900
0x9d2b07 execute_todo
        ../../gcc/passes.c:2005

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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