https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86532
Bug ID: 86532
Summary: [9 Regression] Wrong code due to a wrong strlen
folding starting with r262522
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: msebor at gcc dot gnu.org
Target Milestone: ---
Following simple test-case is miscompiled:
$ cat part.c
static const char dwarf_scnnames[2][3] =
{
[0] = "1",
[1] = "12",
};
int main (int argc, char **argv)
{
int cnt, x;
for (cnt = 0; cnt < 2; cnt++)
x += __builtin_strlen (dwarf_scnnames[cnt]);
__builtin_printf ("value: %d\n", x);
if (x != 3)
__builtin_abort ();
return 0;
}
$ gcc /tmp/part.c -O0 && ./a.out
value: 2
Aborted (core dumped)
