diff options
| author | Ian Lance Taylor <iant@google.com> | 2007-01-28 05:15:06 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2007-01-28 05:15:06 +0000 |
| commit | eeef0e452e98fe6424ce65fb25fba15c59151848 (patch) | |
| tree | 0e2fc9b10a02a481f17a188d9e01389ef7691fb4 /gcc/convert.c | |
| parent | b73a6056563470e5b99e79a0dc769c351e906e6e (diff) | |
| download | gcc-eeef0e452e98fe6424ce65fb25fba15c59151848.tar.gz | |
common.opt: Add fstrict-overflow.
./: * common.opt: Add fstrict-overflow.
* opts.c (decode_options): Set flag_strict_overflow if -O2.
* flags.h (TYPE_OVERFLOW_WRAPS): Define.
(TYPE_OVERFLOW_UNDEFINED): Define.
(TYPE_OVERFLOW_TRAPS): Define. This replaces TYPE_TRAP_SIGNED.
Replace all uses.
* tree.h (TYPE_TRAP_SIGNED): Don't define.
* fold-const.c (negate_expr_p): Use TYPE_OVERFLOW_UNDEFINED.
(fold_negate_expr): Likewise.
(make_range): Likewise.
(extract_muldiv_1): Likewise.
(maybe_canonicalize_comparison): Likewise.
(fold_comparison): Likewise.
(fold_binary): Likewise.
(tree_expr_nonnegative_p): Likewise.
(tree_expr_nonzero_p): Likewise.
* tree-vrp.c (compare_values): Likewise.
(extract_range_from_binary_expr): Likewise.
(extract_range_from_unary_expr): Likewise.
* tree-ssa-loop-niter.c (infer_loop_bounds_from_signedness):
Likewise.
(nowrap_type_p): Likewise.
* tree-scalar-evolution.c (simple_iv): Likewise.
* fold-const.c (negate_expr_p): Use TYPE_OVERFLOW_WRAPS.
(build_range_check): Likewise.
(extract_muldiv_1): Likewise.
(fold_comparison): Likewise.
* tree-vrp.c (vrp_int_const_binop): Likewise.
(extract_range_from_unary_expr): Likewise.
* convert.c (convert_to_integer): Likewise.
* fold-const.c (fold_negate_expr): Use TYPE_OVERFLOW_TRAPS.
(fold_comparison): Likewise.
(fold_binary): Likewise.
* optabs.c (optab_for_tree_code): Likewise.
* tree-vectorizer.c (vect_is_simple_reduction): Likewise.
* simplify-rtx.c (simplify_const_relational_operation): Check
flag_strict_overflow and flag_trapv.
(simplify_const_relational_operation): Likewise.
* doc/invoke.texi (Option Summary): Mention -fstrict-overflow.
(Optimize Options): Add -fstrict-overflow to -O2 list. Document
-fstrict-overflow.
testsuite/:
* gcc.dg/strict-overflow-1.c: New test.
* gcc.dg/no-strict-overflow-1.c: New test.
* gcc.dg/strict-overflow-2.c: New test.
* gcc.dg/no-strict-overflow-2.c: New test.
* gcc.dg/strict-overflow-3.c: New test.
* gcc.dg/no-strict-overflow-3.c: New test.
* gcc.dg/strict-overflow-4.c: New test.
* gcc.dg/no-strict-overflow-4.c: New test.
* gcc.dg/fold-mod-1.c: Add -fstrict-overflow option.
* gcc.dg/pr15784-1.c: Likewise.
* gcc.dg/pr20922-1.c: Likewise.
* gcc.dg/pr20922-3.c: Likewise.
* gcc.dg/pr20922-4.c: Likewise.
* gcc.dg/pr20922-6.c: Likewise.
* gcc.dg/compare-4.c: Likewise.
* gcc.dg/torture/pr26898-1.c: Likewise.
* gcc.dg/tree-ssa/divide-1.c: Likewise.
* gcc.dg/tree-ssa/divide-2.c: Likewise.
* gcc.dg/tree-ssa/divide-3.c: Likewise.
* gcc.dg/tree-ssa/divide-4.c: Likewise.
* gcc.dg/tree-ssa/pr14490-1.c: Likewise.
* gcc.dg/tree-ssa/pr14490-3.c: Likewise.
* gcc.dg/tree-ssa/pr21082.c: Likewise.
* gcc.dg/tree-ssa/pr26899.c: Likewise.
* g++.dg/tree-ssa/pr21082.C: Likewise.
From-SVN: r121254
Diffstat (limited to 'gcc/convert.c')
| -rw-r--r-- | gcc/convert.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/gcc/convert.c b/gcc/convert.c index b7d26ee3c0a..af97d2a7590 100644 --- a/gcc/convert.c +++ b/gcc/convert.c @@ -661,11 +661,10 @@ convert_to_integer (tree type, tree expr) PLUS_EXPR or MINUS_EXPR in an unsigned type. Otherwise, we would introduce signed-overflow undefinedness. */ - || (!flag_wrapv + || ((!TYPE_OVERFLOW_WRAPS (TREE_TYPE (arg0)) + || !TYPE_OVERFLOW_WRAPS (TREE_TYPE (arg1))) && (ex_form == PLUS_EXPR - || ex_form == MINUS_EXPR) - && (!TYPE_UNSIGNED (TREE_TYPE (arg0)) - || !TYPE_UNSIGNED (TREE_TYPE (arg1))))) + || ex_form == MINUS_EXPR))) typex = lang_hooks.types.unsigned_type (typex); else typex = lang_hooks.types.signed_type (typex); |