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| author | Bernd Edlinger <bernd.edlinger@hotmail.de> | 2017-09-15 17:21:50 +0000 |
|---|---|---|
| committer | Bernd Edlinger <edlinger@gcc.gnu.org> | 2017-09-15 17:21:50 +0000 |
| commit | 1d9335766d86262f8335d63d99b328bb44543b01 (patch) | |
| tree | 5e9491b32fa26d79e07318fdf780451f77607b38 /gcc/c | |
| parent | 4a8ca690b0b73f4e0bae542fd69a1ee0d9e73126 (diff) | |
| download | gcc-1d9335766d86262f8335d63d99b328bb44543b01.zip gcc-1d9335766d86262f8335d63d99b328bb44543b01.tar.gz gcc-1d9335766d86262f8335d63d99b328bb44543b01.tar.bz2 | |
common.opt (Wcast-align=strict): New warning option.
2017-09-15 Bernd Edlinger <bernd.edlinger@hotmail.de>
* common.opt (Wcast-align=strict): New warning option.
* doc/invoke.texi: Document -Wcast-align=strict.
c:
2017-09-15 Bernd Edlinger <bernd.edlinger@hotmail.de>
* c-typeck.c (build_c_cast): Implement -Wcast-align=strict.
cp:
2017-09-15 Bernd Edlinger <bernd.edlinger@hotmail.de>
* typeck.c (build_reinterpret_cast_1,
build_const_cast_1): Implement -Wcast-align=strict.
testsuite:
2017-09-15 Bernd Edlinger <bernd.edlinger@hotmail.de>
* c-c++-common/Wcast-align.c: New test.
From-SVN: r252832
Diffstat (limited to 'gcc/c')
| -rw-r--r-- | gcc/c/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/c/c-typeck.c | 5 |
2 files changed, 7 insertions, 2 deletions
diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog index 957daeb..e8e0fb0 100644 --- a/gcc/c/ChangeLog +++ b/gcc/c/ChangeLog @@ -1,3 +1,7 @@ +2017-09-15 Bernd Edlinger <bernd.edlinger@hotmail.de> + + * c-typeck.c (build_c_cast): Implement -Wcast-align=strict. + 2017-09-13 Marek Polacek <polacek@redhat.com> PR c/82167 diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c index f45fd3c..1956d45 100644 --- a/gcc/c/c-typeck.c +++ b/gcc/c/c-typeck.c @@ -5578,7 +5578,7 @@ build_c_cast (location_t loc, tree type, tree expr) } /* Warn about possible alignment problems. */ - if (STRICT_ALIGNMENT + if ((STRICT_ALIGNMENT || warn_cast_align == 2) && TREE_CODE (type) == POINTER_TYPE && TREE_CODE (otype) == POINTER_TYPE && TREE_CODE (TREE_TYPE (otype)) != VOID_TYPE @@ -5587,7 +5587,8 @@ build_c_cast (location_t loc, tree type, tree expr) restriction is unknown. */ && !(RECORD_OR_UNION_TYPE_P (TREE_TYPE (otype)) && TYPE_MODE (TREE_TYPE (otype)) == VOIDmode) - && TYPE_ALIGN (TREE_TYPE (type)) > TYPE_ALIGN (TREE_TYPE (otype))) + && min_align_of_type (TREE_TYPE (type)) + > min_align_of_type (TREE_TYPE (otype))) warning_at (loc, OPT_Wcast_align, "cast increases required alignment of target type"); |