https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119482
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
With flatten enabled at -O2 I get an ICE:
during IPA pass: inline
Interpreter.cpp:3841:1: internal compiler error: in redirect_callee, at
cgraph.cc:1391
0x293749f internal_error(char const*, ...)
/home/apinski/src/upstream-gcc-match/gcc/gcc/diagnostic-global-context.cc:517
0xab270f fancy_abort(char const*, int, char const*)
/home/apinski/src/upstream-gcc-match/gcc/gcc/diagnostic.cc:1749
0x8b200f cgraph_edge::redirect_callee(cgraph_node*)
/home/apinski/src/upstream-gcc-match/gcc/gcc/cgraph.cc:1391
0x116c808 redirect_to_unreachable
/home/apinski/src/upstream-gcc-match/gcc/gcc/ipa-fnsummary.cc:266
0x116c808 edge_set_predicate
/home/apinski/src/upstream-gcc-match/gcc/gcc/ipa-fnsummary.cc:290
0x116cc3f remap_edge_summaries
/home/apinski/src/upstream-gcc-match/gcc/gcc/ipa-fnsummary.cc:4355
0x116ff50 ipa_merge_fn_summary_after_inlining(cgraph_edge*)
/home/apinski/src/upstream-gcc-match/gcc/gcc/ipa-fnsummary.cc:4519
0x1187605 inline_call(cgraph_edge*, bool, vec<cgraph_edge*, va_heap, vl_ptr>*,
int*, bool, bool*)
/home/apinski/src/upstream-gcc-match/gcc/gcc/ipa-inline-transform.cc:522
0x278d2b3 flatten_function
/home/apinski/src/upstream-gcc-match/gcc/gcc/ipa-inline.cc:2557
0x279075a ipa_inline
/home/apinski/src/upstream-gcc-match/gcc/gcc/ipa-inline.cc:2880
Note without flatten, the total time at -O2 was 18s (with -fno-checking) and
40s (with checking). So if anything I think the timing reported here is due to
that.
