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author | Marek Polacek <polacek@redhat.com> | 2016-01-14 17:46:25 +0000 |
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committer | Marek Polacek <mpolacek@gcc.gnu.org> | 2016-01-14 17:46:25 +0000 |
commit | 00083992a68feb592575464d5be98e281e8a2d8e (patch) | |
tree | 44475bf14edc93f3701ba4991f7db8a51048cc53 | |
parent | b56ed680d4715cfc3cf2c4940aef30daec124a41 (diff) | |
download | gcc-00083992a68feb592575464d5be98e281e8a2d8e.zip gcc-00083992a68feb592575464d5be98e281e8a2d8e.tar.gz gcc-00083992a68feb592575464d5be98e281e8a2d8e.tar.bz2 |
re PR c/69262 (Request for better array bounds warning)
PR c/69262
* c-decl.c (grokdeclarator): Provide more information for invalid
array declarations.
* gcc.dg/array-15.c: New test.
From-SVN: r232376
-rw-r--r-- | gcc/c/ChangeLog | 6 | ||||
-rw-r--r-- | gcc/c/c-decl.c | 12 | ||||
-rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
-rw-r--r-- | gcc/testsuite/gcc.dg/array-15.c | 52 |
4 files changed, 75 insertions, 0 deletions
diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog index f8bac2d..3f40b03 100644 --- a/gcc/c/ChangeLog +++ b/gcc/c/ChangeLog @@ -1,3 +1,9 @@ +2016-01-14 Marek Polacek <polacek@redhat.com> + + PR c/69262 + * c-decl.c (grokdeclarator): Provide more information for invalid + array declarations. + 2016-01-06 David Malcolm <dmalcolm@redhat.com> * c-parser.c (c_parser_unary_expression): For dereferences, build diff --git a/gcc/c/c-decl.c b/gcc/c/c-decl.c index 915376d..5830e22 100644 --- a/gcc/c/c-decl.c +++ b/gcc/c/c-decl.c @@ -5951,6 +5951,18 @@ grokdeclarator (const struct c_declarator *declarator, { error_at (loc, "array type has incomplete element type %qT", type); + /* See if we can be more helpful. */ + if (TREE_CODE (type) == ARRAY_TYPE) + { + if (name) + inform (loc, "declaration of %qE as multidimensional " + "array must have bounds for all dimensions " + "except the first", name); + else + inform (loc, "declaration of multidimensional array " + "must have bounds for all dimensions except " + "the first"); + } type = error_mark_node; } else diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 4b5e9e2..3d67923 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2016-01-14 Marek Polacek <polacek@redhat.com> + + PR c/69262 + * gcc.dg/array-15.c: New test. + 2016-01-14 Jakub Jelinek <jakub@redhat.com> PR middle-end/68146 diff --git a/gcc/testsuite/gcc.dg/array-15.c b/gcc/testsuite/gcc.dg/array-15.c new file mode 100644 index 0000000..a002f68 --- /dev/null +++ b/gcc/testsuite/gcc.dg/array-15.c @@ -0,0 +1,52 @@ +/* PR c/69262 */ +/* { dg-do compile } */ +/* { dg-options "-std=c11 -pedantic-errors" } */ + +struct S +{ + int a[1][][2]; /* { dg-error "array type has incomplete element type" } */ + /* { dg-message "declaration of .a. as multidimensional array must have bounds" "" { target *-*-* } 7 } */ +}; + +struct R +{ + int i; + int a[][]; /* { dg-error "array type has incomplete element type" } */ + /* { dg-message "declaration of .a. as multidimensional array must have bounds" "" { target *-*-* } 14 } */ +}; + +typedef int T[]; +typedef int U[][]; /* { dg-error "array type has incomplete element type" } */ +/* { dg-message "declaration of .U. as multidimensional array must have bounds" "" { target *-*-* } 19 } */ + +int x[][]; /* { dg-error "array type has incomplete element type" } */ +/* { dg-message "declaration of .x. as multidimensional array must have bounds" "" { target *-*-* } 22 } */ + +struct N; + +void +fn1 (int z[][]) /* { dg-error "array type has incomplete element type" } */ +/* { dg-message "declaration of .z. as multidimensional array must have bounds" "" { target *-*-* } 28 } */ +{ + int a[1][][2]; /* { dg-error "array type has incomplete element type" } */ + /* { dg-message "declaration of .a. as multidimensional array must have bounds" "" { target *-*-* } 31 } */ + /* OK */ + int b[3][2][1]; + int c[1][2][3][]; /* { dg-error "array type has incomplete element type" } */ + /* { dg-message "declaration of .c. as multidimensional array must have bounds" "" { target *-*-* } 35 } */ + T d[1]; /* { dg-error "array type has incomplete element type" } */ + /* { dg-message "declaration of .d. as multidimensional array must have bounds" "" { target *-*-* } 37 } */ + T e[]; /* { dg-error "array type has incomplete element type" } */ + /* { dg-message "declaration of .e. as multidimensional array must have bounds" "" { target *-*-* } 39 } */ + + /* This array has incomplete element type, but is not multidimensional. */ + struct N f[1]; /* { dg-error "array type has incomplete element type" } */ + /* { dg-bogus "declaration of .f. as multidimensional array must have bounds" "" { target *-*-* } 43 } */ +} + +void fn2 (int [][]); /* { dg-error "array type has incomplete element type" } */ +/* { dg-message "declaration of multidimensional array must have bounds" "" { target *-*-* } 47 } */ +/* OK */ +void fn3 (int [][*]); +void fn4 (T []); /* { dg-error "array type has incomplete element type" } */ +/* { dg-message "declaration of multidimensional array must have bounds" "" { target *-*-* } 51 } */ |