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| author | Martin Jambor <mjambor@suse.cz> | 2011-06-30 15:24:19 +0200 |
|---|---|---|
| committer | Martin Jambor <jamborm@gcc.gnu.org> | 2011-06-30 15:24:19 +0200 |
| commit | 7aa62ea1f86d6126485a01b7e91efe85544cc877 (patch) | |
| tree | b4e799d2e780d8dcdab0916f9db4969ba5b55613 /gcc/tree-sra.c | |
| parent | a32dae63a2b518137716c0de82befeeb47dbcab5 (diff) | |
| download | gcc-7aa62ea1f86d6126485a01b7e91efe85544cc877.zip gcc-7aa62ea1f86d6126485a01b7e91efe85544cc877.tar.gz gcc-7aa62ea1f86d6126485a01b7e91efe85544cc877.tar.bz2 | |
re PR tree-optimization/49094 (ARM aligned(1) attribute is sometimes dropped)
2011-06-30 Martin Jambor <mjambor@suse.cz>
PR tree-optimization/49094
* tree-sra.c (tree_non_mode_aligned_mem_p): New function.
(build_accesses_from_assign): Use it.
* testsuite/gcc.dg/tree-ssa/pr49094.c: New test.
From-SVN: r175703
Diffstat (limited to 'gcc/tree-sra.c')
| -rw-r--r-- | gcc/tree-sra.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/gcc/tree-sra.c b/gcc/tree-sra.c index 45ebd93..e45ff8a 100644 --- a/gcc/tree-sra.c +++ b/gcc/tree-sra.c @@ -1050,6 +1050,26 @@ disqualify_ops_if_throwing_stmt (gimple stmt, tree lhs, tree rhs) return false; } +/* Return true iff type of EXP is not sufficiently aligned. */ + +static bool +tree_non_mode_aligned_mem_p (tree exp) +{ + enum machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); + unsigned int align; + + if (TREE_CODE (exp) == SSA_NAME + || mode == BLKmode + || !STRICT_ALIGNMENT) + return false; + + align = get_object_alignment (exp, BIGGEST_ALIGNMENT); + if (GET_MODE_ALIGNMENT (mode) > align) + return true; + + return false; +} + /* Scan expressions occuring in STMT, create access structures for all accesses to candidates for scalarization and remove those candidates which occur in statements or expressions that prevent them from being split apart. Return @@ -1074,7 +1094,10 @@ build_accesses_from_assign (gimple stmt) lacc = build_access_from_expr_1 (lhs, stmt, true); if (lacc) - lacc->grp_assignment_write = 1; + { + lacc->grp_assignment_write = 1; + lacc->grp_unscalarizable_region |= tree_non_mode_aligned_mem_p (rhs); + } if (racc) { @@ -1082,6 +1105,7 @@ build_accesses_from_assign (gimple stmt) if (should_scalarize_away_bitmap && !gimple_has_volatile_ops (stmt) && !is_gimple_reg_type (racc->type)) bitmap_set_bit (should_scalarize_away_bitmap, DECL_UID (racc->base)); + racc->grp_unscalarizable_region |= tree_non_mode_aligned_mem_p (lhs); } if (lacc && racc |