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/c99-const-expr-11.c | 46 ++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/c99-const-expr-11.c (limited to 'gcc/testsuite/gcc.dg/c99-const-expr-11.c') diff --git a/gcc/testsuite/gcc.dg/c99-const-expr-11.c b/gcc/testsuite/gcc.dg/c99-const-expr-11.c new file mode 100644 index 000000000..21d9c5f46 --- /dev/null +++ b/gcc/testsuite/gcc.dg/c99-const-expr-11.c @@ -0,0 +1,46 @@ +/* Test for constant expressions: cases involving VLAs. */ +/* Origin: Joseph Myers */ +/* { dg-do compile } */ +/* { dg-options "-std=iso9899:1999 -pedantic-errors" } */ + +/* It appears address constants may contain casts to variably modified + types. Whether they should be permitted was discussed in + + ; since static pointers to VLAs + are definitely permitted within functions and may be initialized + and such initialization involves implicit conversion to a variably + modified type, allowing explicit casts seems appropriate. Thus, + GCC allows them as long as the "evaluated" size expressions do not + contain the various operators not permitted to be evaluated in a + constant expression, and as long as the result is genuinely + constant (meaning that pointer arithmetic using the size of the VLA + is generally not permitted). */ + +static int sa[100]; + +volatile int nv; + +int +f (int m, int n) +{ + static int (*a1)[n] = &sa; + static int (*a2)[n] = (int (*)[n])sa; + static int (*a3)[n] = (int (*)[(int){n}])sa; + static int (*a4)[n] = (int (*)[(int){m++}])sa; /* { dg-error "constant" } */ + static int (*a5)[n] = (int (*)[(int){++m}])sa; /* { dg-error "constant" } */ + static int (*a6)[n] = (int (*)[(int){m--}])sa; /* { dg-error "constant" } */ + static int (*a7)[n] = (int (*)[(int){--m}])sa; /* { dg-error "constant" } */ + static int (*a8)[n] = (int (*)[(m=n)])sa; /* { dg-error "constant" } */ + static int (*a9)[n] = (int (*)[(m+=n)])sa; /* { dg-error "constant" } */ + static int (*a10)[n] = (int (*)[f(m,n)])sa; /* { dg-error "constant" } */ + static int (*a11)[n] = (int (*)[(m,n)])sa; /* { dg-error "constant" } */ + static int (*a12)[n] = (int (*)[sizeof(int[n])])sa; + static int (*a13)[n] = (int (*)[sizeof(int[m++])])sa; /* { dg-error "constant" } */ + static int (*a14)[n] = (int (*)[sizeof(*a1)])sa; + static int (*a15)[n] = (int (*)[sizeof(*(int (*)[n])sa)])sa; + static int (*a16)[n] = (int (*)[sizeof(*(int (*)[m++])sa)])sa; /* { dg-error "constant" } */ + static int (*a17)[n] = (int (*)[nv])sa; + typedef int (*vmt)[m++]; + static int (*a18)[n] = (vmt)sa; + return n; +} -- cgit v1.2.3