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| author | Richard Biener <rguenther@suse.de> | 2016-12-01 12:15:44 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2016-12-01 12:15:44 +0000 |
| commit | a1fc386ac283d309eb6af8cf7b009d528bc52a9a (patch) | |
| tree | 40f83cfc23b7f3fecf0c7248efe7f80b8a494a52 | |
| parent | b0da97091dbeca1e2653208febaa747f4e5a85bb (diff) | |
| download | gcc-a1fc386ac283d309eb6af8cf7b009d528bc52a9a.zip gcc-a1fc386ac283d309eb6af8cf7b009d528bc52a9a.tar.gz gcc-a1fc386ac283d309eb6af8cf7b009d528bc52a9a.tar.bz2 | |
tree-ssa-alias.c (indirect_refs_may_alias_p): Do not treat arrays with same type as objects that cannot overlap.
2016-12-01 Richard Biener <rguenther@suse.de>
* tree-ssa-alias.c (indirect_refs_may_alias_p): Do not
treat arrays with same type as objects that cannot overlap.
* gcc.dg/torture/alias-2.c: New testcase.
From-SVN: r243106
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/alias-2.c | 17 |
3 files changed, 26 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2683757..19cb0ce 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2016-12-01 Richard Biener <rguenther@suse.de> + + * tree-ssa-alias.c (indirect_refs_may_alias_p): Do not + treat arrays with same type as objects that cannot overlap. + 2016-12-01 Georg-Johann Lay <avr@gjlay.de> * config/avr/avr.c (avr_print_operand): Use SYMBOL_REF_P if possible. diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index ab55b43..447d9fb 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2016-12-01 Richard Biener <rguenther@suse.de> + + * gcc.dg/torture/alias-2.c: New testcase. + 2016-12-01 Georg-Johann Lay <avr@gjlay.de> * gcc.target/avr/tiny-memx.c: Only perform if target avr_tiny. diff --git a/gcc/testsuite/gcc.dg/torture/alias-2.c b/gcc/testsuite/gcc.dg/torture/alias-2.c new file mode 100644 index 0000000..329d46a --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/alias-2.c @@ -0,0 +1,17 @@ +/* { dg-do run } */ + +/* We do not want to treat int[3] as an object that cannot overlap + itself but treat it as arbitrary sub-array of a larger array object. */ +int ar1(int (*p)[3], int (*q)[3]) +{ + (*p)[0] = 1; + (*q)[1] = 2; + return (*p)[0]; +} +int main() +{ + int a[4]; + if (ar1 ((int (*)[3])&a[1], (int (*)[3])&a[0]) != 2) + __builtin_abort (); + return 0; +} |