On 08/20/2015 04:37 AM, Marek Polacek wrote:
On Thu, Aug 20, 2015 at 11:02:17AM +0200, Andreas Schwab wrote:
Marek Polacek <pola...@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
Whilst I'm struggling with building cross libgo to reproduce this, is
there something like preprocessed source for go? So that ideally I'd
just run ./go1 foo.go? That'd help tremendously.
The process for finding out what Go's doing is, umm, exceedingly
difficult. Though at least for gcc-go, using "-v" will help.
RTH might have some ideas.
Based on the error, I suspect we've got a block ending with a
GIMPLE_COND with no successors in the CFG.
jeff
