https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93223
Bug ID: 93223
Summary: Segmentation fault in ipa-cp.c
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: christoph.hoeger at celeraone dot com
CC: marxin at gcc dot gnu.org
Target Milestone: ---
Created attachment 47629
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47629&action=edit
test
The following crash occurs under a specific combination of anonymous namespace,
disabled optimizations and the usage of function pointers with -O3 :
gcc_bug g++ -O3 -c demo.cpp
during IPA pass: cp
/tmp/test.cpp:59:1: internal compiler error: Segmentation fault
59 | }
| ^
0x8cdeef ???
../../gcc/toplev.c:327
0x15ab641 ???
../../gcc/ipa-cp.c:2570
0x15ad6ad ???
../../gcc/ipa-cp.c:2828
0x15aa364 ???
../../gcc/ipa-cp.c:3025
0x15a827d ???
../../gcc/ipa-cp.c:3196
0x1163fc6 ???
../../gcc/passes.c:2508
0x14da21a ???
../../gcc/passes.c:2948
0x1472bf7 ???
../../gcc/cgraphunit.c:2542
0x10157d4 ???
../../gcc/cgraphunit.c:2865
0x14e804f ???
../../gcc/toplev.c:482
0xec7947 ???
../../gcc/toplev.c:2206
0xec9a5f ???
../../gcc/main.c:39
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
Preprocessed source stored into /tmp/ccwnkWOK.out file, please attach this to
your bugreport.
See attached file demo.cpp for reproduction.
According to godbolt, the issue persists in trunk:
https://godbolt.org/z/T_NMPf
Please note the suspicuous line here:
https://github.com/gcc-mirror/gcc/blob/gcc-9_2_0-release/gcc/ipa-cp.c#L2569
it looks like the result of ipa_fn_summaries->get (callee); should be checked
for nullptr.
Also, the issue is rather hard to trigger as it seems to depend on heuristic
optimizations.
