diff options
| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-05-08 08:20:45 +0000 |
|---|---|---|
| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-05-08 08:20:45 +0000 |
| commit | 5949e0492163d97190c344b08a435b01c9a2ae34 (patch) | |
| tree | e0980eeaca11a9f476d545834ecfe14de6369efe /gcc | |
| parent | 07018da0131fb14947fa2f76060d46aaf6779bb0 (diff) | |
| download | gcc-5949e0492163d97190c344b08a435b01c9a2ae34.tar.gz | |
2008-05-08 Richard Guenther <rguenther@suse.de>
PR middle-end/36154
* tree-ssa-structalias.c (push_fields_onto_fieldstack): Make
sure to create a representative for trailing arrays for PTA.
* gcc.c-torture/compile/pr36154.c: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@135071 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/pr36154.c | 11 | ||||
| -rw-r--r-- | gcc/tree-ssa-structalias.c | 12 |
4 files changed, 30 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index bdc484612dd..1121be1a9e0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2008-05-08 Richard Guenther <rguenther@suse.de> + PR middle-end/36154 + * tree-ssa-structalias.c (push_fields_onto_fieldstack): Make + sure to create a representative for trailing arrays for PTA. + +2008-05-08 Richard Guenther <rguenther@suse.de> + PR middle-end/36172 * fold-const.c (operand_equal_p): Two objects which types differ in pointerness are not equal. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 68626fdf2f1..2b137fa9988 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,5 +1,10 @@ 2008-05-08 Richard Guenther <rguenther@suse.de> + PR middle-end/36154 + * gcc.c-torture/compile/pr36154.c: New testcase. + +2008-05-08 Richard Guenther <rguenther@suse.de> + PR middle-end/36172 * gcc.c-torture/compile/pr36172.c: New testcase. diff --git a/gcc/testsuite/gcc.c-torture/compile/pr36154.c b/gcc/testsuite/gcc.c-torture/compile/pr36154.c new file mode 100644 index 00000000000..ae3eb83fa11 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr36154.c @@ -0,0 +1,11 @@ +struct eth_test_pkt { + unsigned short len; + unsigned short ctr; + unsigned char packet[]; +} __attribute__ ((packed)); +struct eth_test_pkt pkt_unaligned = { .packet = { 0xFC } }; +int cmd_unaligned(const void *p) +{ + return memcmp(p, pkt_unaligned.packet, 1); +} + diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c index ddcf4982690..d58478ebeb2 100644 --- a/gcc/tree-ssa-structalias.c +++ b/gcc/tree-ssa-structalias.c @@ -4160,11 +4160,15 @@ push_fields_onto_fieldstack (tree type, VEC(fieldoff_s,heap) **fieldstack, (DECL_NONADDRESSABLE_P (field) ? addressable_type : TREE_TYPE (field)))) - && DECL_SIZE (field) - && !integer_zerop (DECL_SIZE (field))) - /* Empty structures may have actual size, like in C++. So + && ((DECL_SIZE (field) + && !integer_zerop (DECL_SIZE (field))) + || (!DECL_SIZE (field) + && TREE_CODE (TREE_TYPE (field)) == ARRAY_TYPE))) + /* Empty structures may have actual size, like in C++. So see if we didn't push any subfields and the size is - nonzero, push the field onto the stack */ + nonzero, push the field onto the stack. Trailing flexible + array members also need a representative to be able to + treat taking their address in PTA. */ push = true; if (push) |