Re: [PATCH] PR c/70281: C FE: fix uninitialized range for __builtin_types_compatible_p

[Jeff Law]

On 03/18/2016 10:25 AM, David Malcolm wrote:

PR c/70281 reports another case where Valgrind identified an uninitialized
src_range in a c_expr in the C frontend, this time in
the parsing of __builtin_types_compatible_p.

For gcc 7 I hope to fix this more robustly (via poisoning the values in
a c_expr ctor), but for now, this patch fixes the specific issue found.

Successfully bootstrapped on x86_64-pc-linux-gnu; adds 7 PASS results
to gcc.sum.

OK for trunk?

gcc/c/ChangeLog:
        PR c/70281
        * c-parser.c (c_parser_postfix_expression): Set the source range
        for uses of "__builtin_types_compatible_p".

gcc/testsuite/ChangeLog:
        PR c/70281
        * gcc.dg/plugin/diagnostic-test-expressions-1.c
        (test_builtin_types_compatible_p): New test function.
        * gcc.dg/pr70281.c: New test case.

OK
jeff