https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102474
Bug ID: 102474
Summary: [12 regression] Crash in ipa-modref compiling Go code
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: blocker
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ian at airs dot com
Target Milestone: ---
Compiling this Go program with -O1 -fno-strict-aliasing crashes the compiler in
ipa-modref.
package p
type S struct {
f1 string
f2 interface{}
f3 string
f4 struct {
f41 uint32
f42 struct {
f421 int32
f422 uint32
}
}
f5 struct {
f51 *byte
f52 *byte
f53 *byte
}
f6 struct {
f61 int32
}
f7 struct {
f71 uint64
f72 int64
f73 *byte
}
f8 *byte
}
The crash I see is:
during IPA pass: modref
go1: internal compiler error: in forced_merge, at ipa-modref-tree.h:351
0xcbaff1 modref_access_node::forced_merge(modref_access_node const&, bool)
../../trunk/gcc/ipa-modref-tree.h:351
0xcbe389 modref_ref_node<int>::insert_access(modref_access_node, unsigned long,
bool)
../../trunk/gcc/ipa-modref-tree.h:575
0xcbe8e3 modref_tree<int>::insert(int, int, modref_access_node, bool)
../../trunk/gcc/ipa-modref-tree.h:844
0xcb65de propagate_unknown_call
../../trunk/gcc/ipa-modref.c:3418
0xcb6a69 modref_propagate_in_scc
../../trunk/gcc/ipa-modref.c:3598
0xcb740e execute
../../trunk/gcc/ipa-modref.c:3968
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with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
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