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| author | Richard Biener <rguenther@suse.de> | 2017-07-18 07:35:40 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-07-18 07:35:40 +0000 |
| commit | f9bfe3f57e74f85d2d548ba470303f1feb97f3bf (patch) | |
| tree | 9ec1e7a1891bb4a5f04d44bddc9d387b26111adb /gcc/tree-ssa-pre.c | |
| parent | d2e78d766294a5e548c2eaf92f07a8f768120e1c (diff) | |
| download | gcc-f9bfe3f57e74f85d2d548ba470303f1feb97f3bf.zip gcc-f9bfe3f57e74f85d2d548ba470303f1feb97f3bf.tar.gz gcc-f9bfe3f57e74f85d2d548ba470303f1feb97f3bf.tar.bz2 | |
re PR tree-optimization/80620 (gcc produces wrong code with -O3)
2017-07-18 Richard Biener <rguenther@suse.de>
PR tree-optimization/80620
PR tree-optimization/81403
* tree-ssa-pre.c (phi_translate_1): Clear range and points-to
info when re-using a VN table entry.
* gcc.dg/torture/pr80620.c: New testcase.
* gcc.dg/torture/pr81403.c: Likewise.
From-SVN: r250297
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 2a431c9..0ec3d3c 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -1489,6 +1489,45 @@ phi_translate_1 (pre_expr expr, bitmap_set_t set1, bitmap_set_t set2, PRE_EXPR_NARY (expr) = nary; new_val_id = nary->value_id; get_or_alloc_expression_id (expr); + /* When we end up re-using a value number make sure that + doesn't have unrelated (which we can't check here) + range or points-to info on it. */ + if (result + && INTEGRAL_TYPE_P (TREE_TYPE (result)) + && SSA_NAME_RANGE_INFO (result) + && ! SSA_NAME_IS_DEFAULT_DEF (result)) + { + if (! VN_INFO (result)->info.range_info) + { + VN_INFO (result)->info.range_info + = SSA_NAME_RANGE_INFO (result); + VN_INFO (result)->range_info_anti_range_p + = SSA_NAME_ANTI_RANGE_P (result); + } + if (dump_file && (dump_flags & TDF_DETAILS)) + { + fprintf (dump_file, "clearing range info of "); + print_generic_expr (dump_file, result); + fprintf (dump_file, "\n"); + } + SSA_NAME_RANGE_INFO (result) = NULL; + } + else if (result + && POINTER_TYPE_P (TREE_TYPE (result)) + && SSA_NAME_PTR_INFO (result) + && ! SSA_NAME_IS_DEFAULT_DEF (result)) + { + if (! VN_INFO (result)->info.ptr_info) + VN_INFO (result)->info.ptr_info + = SSA_NAME_PTR_INFO (result); + if (dump_file && (dump_flags & TDF_DETAILS)) + { + fprintf (dump_file, "clearing points-to info of "); + print_generic_expr (dump_file, result); + fprintf (dump_file, "\n"); + } + SSA_NAME_PTR_INFO (result) = NULL; + } } else { |