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| author | Richard Biener <rguenther@suse.de> | 2016-02-26 08:34:58 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2016-02-26 08:34:58 +0000 |
| commit | 5aed7e2c0d9bde14f5c0e45e3d29727e6ec94324 (patch) | |
| tree | 3dd3aecb6d28e8d12f988dbaf374e94218608ece /gcc/tree-ssa-structalias.c | |
| parent | 8ba8c3757ba2d1325e75b637ca410609f716d4c0 (diff) | |
| download | gcc-5aed7e2c0d9bde14f5c0e45e3d29727e6ec94324.zip gcc-5aed7e2c0d9bde14f5c0e45e3d29727e6ec94324.tar.gz gcc-5aed7e2c0d9bde14f5c0e45e3d29727e6ec94324.tar.bz2 | |
re PR target/69551 (Wrong code with single element vector insert)
2016-02-26 Richard Biener <rguenther@suse.de>
PR tree-optimization/69551
* tree-ssa-structalias.c (get_constraint_for_ssa_var): When
looking through aliases adjust DECL_PT_UID to refer to the
ultimate alias target.
* gcc.dg/torture/pr69951.c: New testcase.
From-SVN: r233734
Diffstat (limited to 'gcc/tree-ssa-structalias.c')
| -rw-r--r-- | gcc/tree-ssa-structalias.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c index d7a7dc5..de12380 100644 --- a/gcc/tree-ssa-structalias.c +++ b/gcc/tree-ssa-structalias.c @@ -2943,6 +2943,14 @@ get_constraint_for_ssa_var (tree t, vec<ce_s> *results, bool address_p) if (node && node->alias && node->analyzed) { node = node->ultimate_alias_target (); + /* Canonicalize the PT uid of all aliases to the ultimate target. + ??? Hopefully the set of aliases can't change in a way that + changes the ultimate alias target. */ + gcc_assert ((! DECL_PT_UID_SET_P (node->decl) + || DECL_PT_UID (node->decl) == DECL_UID (node->decl)) + && (! DECL_PT_UID_SET_P (t) + || DECL_PT_UID (t) == DECL_UID (node->decl))); + DECL_PT_UID (t) = DECL_UID (node->decl); t = node->decl; } } |