From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/testsuite/gcc.dg/pr30457.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/pr30457.c (limited to 'gcc/testsuite/gcc.dg/pr30457.c') diff --git a/gcc/testsuite/gcc.dg/pr30457.c b/gcc/testsuite/gcc.dg/pr30457.c new file mode 100644 index 000000000..f52332d0a --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr30457.c @@ -0,0 +1,26 @@ +/* PR 30457 warn about va_start(ap, invalid) */ +/* { dg-do compile } */ +/* { dg-options "-std=c99" } */ + +/* Undefined by C99 7.15.1.4p4 (va_start): + "If the parameter parmN is declared with the register storage + class, with a function or array type, or with a type that is + not compatible with the type that results after application of + the default argument promotions, the behavior is undefined." */ + +#include + +void foo(register short paramN, ...) +{ + va_list ap; + + va_start(ap, paramN); /* { dg-warning "undefined behaviour when second parameter of 'va_start' is declared with 'register' storage" } */ + + /* Undefined by C99 7.15.1.1p2: */ + (void) va_arg(ap, char); /* { dg-warning "'char' is promoted to 'int' when passed through '...'" } */ + /* { dg-message "note: .so you should pass .int. not .char. to .va_arg.." "" { target *-*-* } 20 } */ + /* { dg-message "note: if this code is reached, the program will abort" "" { target *-*-* } 20 } */ + + va_end(ap); +} + -- cgit v1.2.3