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| author | Martin Sebor <msebor@redhat.com> | 2018-08-28 19:09:38 +0000 |
|---|---|---|
| committer | Martin Sebor <msebor@gcc.gnu.org> | 2018-08-28 13:09:38 -0600 |
| commit | 0aaafa5e95df44eed3ad67ea65c9afda2dbdd493 (patch) | |
| tree | dbf4c33008642719c398d068222b45cd34a970c4 /gcc/stor-layout.c | |
| parent | dd35da2cbef6d8bf9db86d7e66faeebb5022c881 (diff) | |
| download | gcc-0aaafa5e95df44eed3ad67ea65c9afda2dbdd493.zip gcc-0aaafa5e95df44eed3ad67ea65c9afda2dbdd493.tar.gz gcc-0aaafa5e95df44eed3ad67ea65c9afda2dbdd493.tar.bz2 | |
PR middle-end/86631 - missing -Walloc-size-larger-than on ILP32 hosts
gcc/ChangeLog:
PR middle-end/86631
* calls.c (alloc_max_size): Treat HOST_WIDE_INT special.
* gimple-ssa-warn-alloca.c (adjusted_warn_limit): New function.
(pass_walloca::gate): Use it.
(alloca_call_type): Same.
(pass_walloca::execute): Same.
* stor-layout.c (layout_decl): Treat HOST_WIDE_INT special.
gcc/testsuite/ChangeLog:
PR middle-end/86631
* g++.dg/Walloca1.C: Adjust.
From-SVN: r263928
Diffstat (limited to 'gcc/stor-layout.c')
| -rw-r--r-- | gcc/stor-layout.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index 85937d0..088f360 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -760,14 +760,19 @@ layout_decl (tree decl, unsigned int known_align) { tree size = DECL_SIZE_UNIT (decl); - if (size != 0 && TREE_CODE (size) == INTEGER_CST - && compare_tree_int (size, warn_larger_than_size) > 0) + if (size != 0 && TREE_CODE (size) == INTEGER_CST) { - unsigned HOST_WIDE_INT uhwisize = tree_to_uhwi (size); - - warning (OPT_Wlarger_than_, "size of %q+D %wu bytes exceeds " - "maximum object size %wu", - decl, uhwisize, warn_larger_than_size); + /* -Wlarger-than= argument of HOST_WIDE_INT_MAX is treated + as if PTRDIFF_MAX had been specified, with the value + being that on the target rather than the host. */ + unsigned HOST_WIDE_INT max_size = warn_larger_than_size; + if (max_size == HOST_WIDE_INT_MAX) + max_size = tree_to_shwi (TYPE_MAX_VALUE (ptrdiff_type_node)); + + if (compare_tree_int (size, max_size) > 0) + warning (OPT_Wlarger_than_, "size of %q+D %E bytes exceeds " + "maximum object size %wu", + decl, size, max_size); } } |