| /* PR middle-end/100137 - -Warray-bounds false positive on varying offset |
| plus negative |
| { dg-do compile } |
| { dg-options "-O2 -Wall" } */ |
| |
| extern char ax[], a1[1], a2[2], a3[3], a4[4], a5[5]; |
| |
| int* ptr; |
| #define X (*ptr++) |
| |
| |
| __attribute__ ((noipa)) void |
| array_plus_var_minus_cstint (int i, int j) |
| { |
| { |
| const char *p = ax; |
| p += i; |
| X = p[-1]; |
| X = p[-123]; |
| } |
| |
| { |
| const char *p = a1; |
| p += i; |
| X = p[-1]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-2]; // { dg-warning "\\\[-Warray-bounds" } |
| X = p[-3]; // { dg-warning "\\\[-Warray-bounds" } |
| X = p[-4]; // { dg-warning "\\\[-Warray-bounds" } |
| } |
| |
| { |
| const char *p = a2; |
| p += i; |
| X = p[-1]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-2]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-3]; // { dg-warning "\\\[-Warray-bounds" } |
| X = p[-4]; // { dg-warning "\\\[-Warray-bounds" } |
| } |
| |
| { |
| const char *p = a3; |
| p += i; |
| X = p[-1]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-2]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-3]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-4]; // { dg-warning "\\\[-Warray-bounds" } |
| X = p[-5]; // { dg-warning "\\\[-Warray-bounds" } |
| } |
| |
| { |
| const char *p = a4; |
| p += i; |
| X = p[-1]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-2]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-3]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-4]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-5]; // { dg-warning "\\\[-Warray-bounds" } |
| X = p[-6]; // { dg-warning "\\\[-Warray-bounds" } |
| } |
| |
| { |
| const char *p = a5; |
| p += i; |
| p += j; |
| X = p[-1]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-2]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-3]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-4]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-5]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-6]; // { dg-warning "\\\[-Warray-bounds" } |
| } |
| } |
| |
| |
| __attribute__ ((noipa)) void |
| array_plus_var_minus_cstlong (long i, long j) |
| { |
| { |
| const char *p = ax; |
| p += i; |
| X = p[-1]; |
| X = p[-123]; |
| } |
| |
| { |
| const char *p = a1; |
| p += i; |
| X = p[-1]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-2]; // { dg-warning "\\\[-Warray-bounds" } |
| X = p[-3]; // { dg-warning "\\\[-Warray-bounds" } |
| X = p[-4]; // { dg-warning "\\\[-Warray-bounds" } |
| } |
| |
| { |
| const char *p = a2; |
| p += i; |
| X = p[-1]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-2]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-3]; // { dg-warning "\\\[-Warray-bounds" } |
| X = p[-4]; // { dg-warning "\\\[-Warray-bounds" } |
| } |
| |
| { |
| const char *p = a3; |
| p += i; |
| X = p[-1]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-2]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-3]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-4]; // { dg-warning "\\\[-Warray-bounds" } |
| X = p[-5]; // { dg-warning "\\\[-Warray-bounds" } |
| } |
| |
| { |
| const char *p = a4; |
| p += i; |
| X = p[-1]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-2]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-3]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-4]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-5]; // { dg-warning "\\\[-Warray-bounds" } |
| X = p[-6]; // { dg-warning "\\\[-Warray-bounds" } |
| } |
| |
| { |
| const char *p = a5; |
| p += i; |
| p += j; |
| X = p[-1]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-2]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-3]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-4]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-5]; // { dg-bogus "\\\[-Warray-bounds" } |
| X = p[-6]; // { dg-warning "\\\[-Warray-bounds" } |
| } |
| } |
