https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63638
Bug ID: 63638
Summary: [4.9 Regression] internal compiler error: in
asan_expand_check_ifn (with -fsanitize=address)
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: ai.azuma at gmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
Created attachment 33802
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33802&action=edit
Output of -v option and preprocessed file
The following code causes an ICE on GCC 4.9.2 20141022 with -fsanitize=address.
//================================
// <string> header is supposed to
// be required for memcpy, but
// there is an implicit built-in
// declaration.
//#include<string>
struct S{
long d0, d1, d2, d3, d4, d5, d6;
};
struct S s[6];
int f()
{
struct S *p;
memcpy(p, &s[2], sizeof(*p));
memcpy(p, &s[1], sizeof(*p));
}
//================================
The above code successfully compiles on GCC 4.9.2 20141015 with
-fsanitize=address, so it seems a regression that has been introduced between
them. The reproducer originally comes from GMP 6.0.0a configure script.
