On Thu, 2015-08-20 11:02:17 +0200, Andreas Schwab <schwab@suse.de> wrote:
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 âgob.decIgnoreOpFor.pN20_encoding_gob.Decoderâ:
../../../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
"And now for something completely different."
Not quite. As it seems, it breaks any build:
configure --prefix=... --disable-multilib --enable-languages=all,ada,go
make
Seems the Go code triggers this ICE, so you just need to enable Go.