https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63226
Bug ID: 63226
Summary: ICE with -flto-odr-type-merging
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
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
The ICE depends on Honza's no-yet committed patch:
https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00878.html
With that patch (and hence -flto-odr-type-merging), one gets the following ICE:
$ g++ -c -flto one12.ii two10.ii
$ g++ -flto -flto-odr-type-merging one12.o two10.ii
lto1: internal compiler error: in odr_types_equivalent_p, at ipa-devirt.c:1066
0x815714 odr_types_equivalent_p
../../gcc/ipa-devirt.c:1066
0x815a3e add_type_duplicate
../../gcc/ipa-devirt.c:1116
Note: -Wodr doesn't warn for this test case.
With the files one12.ii:
----------------------------------------
class ONE;
class OneClass {
ONE *swpmi;
OneClass ();
};
typedef struct ynodetype_t *ynode;
typedef struct ynodetype_t {
union {
struct { ynode child1, child3; } i;
} y;
} ynodetype;
class ONE {
union _xynode { ynode yn; } ;
};
OneClass::OneClass () { }
----------------------------------------
two10.ii:
----------------------------------------
class ONE;
class TwoClass {
ONE *swpci;
TwoClass ();
};
typedef struct ynodetype_t *ynode;
typedef struct { } yleaftype;
typedef struct ynodetype_t {
union {
struct { yleaftype leaf; } i;
} y;
} ynodetype;
typedef ynode ytree;
class ONE {
ytree Tree;
};
TwoClass::TwoClass () { }
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