https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65316
Bug ID: 65316
Summary: [5 Regression] LTO: Uninitialized memory / ICE with -g
-fno-lto-odr-type-merging: in types_same_for_odr, at
ipa-devirt.c:465
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: burnus at gcc dot gnu.org
CC: hubicka at gcc dot gnu.org
Created attachment 34954
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34954&action=edit
one.ii
Follow up to PR65276 and PR65302.
It turned out that is issue is due to uninitialized memory. Thus, if the last
command succeeds, simply try again a couple of times (in delta, I called it up
to 25 times) - or run it under valgrind or similar.
It fails with the ICE:
lto1: internal compiler error: in types_same_for_odr, at ipa-devirt.c:465
touch two.ii
g++ -c -std=c++11 -g2 -fno-lto-odr-type-merging -flto -O2 two.ii one.ii
gcc -r -nostdlib -O2 -fno-lto-odr-type-merging -flto one.o two.o
