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| author | Richard Biener <rguenther@suse.de> | 2014-04-28 14:36:13 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2014-04-28 14:36:13 +0000 |
| commit | 22869a37b0d0bb3107a6a55d95a08dd243bc50fc (patch) | |
| tree | 51d32838b9998a12218d4e27734aff397aed9cb6 /gcc/tree-ssa-ccp.c | |
| parent | 771c950116f7b08a45eecb6334954cfe8891a587 (diff) | |
| download | gcc-22869a37b0d0bb3107a6a55d95a08dd243bc50fc.zip gcc-22869a37b0d0bb3107a6a55d95a08dd243bc50fc.tar.gz gcc-22869a37b0d0bb3107a6a55d95a08dd243bc50fc.tar.bz2 | |
re PR middle-end/60092 (posix_memalign not recognized to derive alias and alignment info)
2014-04-28 Richard Biener <rguenther@suse.de>
PR middle-end/60092
* builtins.def (DEF_C11_BUILTIN): Add.
(BUILT_IN_ALIGNED_ALLOC): Likewise.
* coretypes.h (enum function_class): Add function_c11_misc.
* tree-ssa-alias.c (ref_maybe_used_by_call_p_1): Handle
BUILT_IN_ALIGNED_ALLOC like BUILT_IN_MALLOC.
(call_may_clobber_ref_p_1): Likewise.
* tree-ssa-dce.c (mark_stmt_if_obviously_necessary): Likewise.
(mark_all_reaching_defs_necessary_1): Likewise.
(propagate_necessity): Likewise.
(eliminate_unnecessary_stmts): Likewise.
* tree-ssa-ccp.c (evaluate_stmt): Handle BUILT_IN_ALIGNED_ALLOC.
ada/
* gcc-interface/utils.c: Define flag_isoc11.
lto/
* lto-lang.c: Define flag_isoc11.
* gcc.dg/tree-ssa/alias-32.c: New testcase.
* gcc.dg/vect/pr60092.c: Likewise.
From-SVN: r209863
Diffstat (limited to 'gcc/tree-ssa-ccp.c')
| -rw-r--r-- | gcc/tree-ssa-ccp.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c index 257d108..5e6b4d8 100644 --- a/gcc/tree-ssa-ccp.c +++ b/gcc/tree-ssa-ccp.c @@ -1762,6 +1762,25 @@ evaluate_stmt (gimple stmt) val = bit_value_assume_aligned (stmt, NULL_TREE, val, false); break; + case BUILT_IN_ALIGNED_ALLOC: + { + tree align = get_constant_value (gimple_call_arg (stmt, 0)); + if (align + && tree_fits_uhwi_p (align)) + { + unsigned HOST_WIDE_INT aligni = tree_to_uhwi (align); + if (aligni > 1 + /* align must be power-of-two */ + && (aligni & (aligni - 1)) == 0) + { + val.lattice_val = CONSTANT; + val.value = build_int_cst (ptr_type_node, 0); + val.mask = double_int::from_shwi (-aligni); + } + } + break; + } + default:; } } |