https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67359
Bug ID: 67359
Summary: struct-layout-1_generate.c undefined behaviour
Product: gcc
Version: 5.2.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: zeccav at gmail dot com
Target Milestone: ---
Running struct-layout-1_generate.c the sanitized version of gcc finds two
undefined statements:
At line 1081
m &= (1ULL << e->len) - 1;
I get
/home/vitti/gcc-5.2.0/gcc/testsuite/gcc.dg/compat/struct-layout-1_generate.c:1081:13:
runtime error: shift exponent 64 is too large for 64-bit type 'long long
unsigned int'
It seems that e->len == 64 and the shift is too large for 1ULL
At line 1901
&& e[n].type < &complex_attrib_array_types[NAATYPES2])
should be
&& e[n].type < &complex_attrib_array_types[NCAATYPES2])
to avoid
/home/vitti/gcc-5.2.0/gcc/testsuite/gcc.dg/compat/struct-layout-1_generate.c:1901:51:
runtime error: index 83 out of bounds for type 'types [54]'
