On Tue, 24 Nov 2015, Jakub Jelinek wrote:
> Hi!
>
> This is the GIMPLE side of Richard's i?86 uadd/usub overflow
> testing improvements. If unsigned addition or subtraction
> result is used both normally and in a GIMPLE_COND/COND_EXPR/tcc_comparison
> that tests if unsigned overflow happened, the patch replaces it shortly
> before expansion with {ADD,SUB}_OVERFLOW, so that RTL expansion can generate
> better code on it.
>
> Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
Ok.
Thanks,
Richard.
> 2015-11-24 Jakub Jelinek <ja...@redhat.com>
>
> PR target/67089
> * tree-ssa-math-opts.c (uaddsub_overflow_check_p,
> match_uaddsub_overflow): New functions.
> (pass_optimize_widening_mul::execute): Call match_uaddsub_overflow.
>
> * gcc.dg/pr67089-1.c: New test.
> * gcc.dg/pr67089-2.c: New test.
> * gcc.dg/pr67089-3.c: New test.
> * gcc.dg/pr67089-4.c: New test.
> * gcc.dg/pr67089-5.c: New test.
> * gcc.dg/pr67089-6.c: New test.
> * gcc.dg/pr67089-7.c: New test.
>
> --- gcc/tree-ssa-math-opts.c.jj 2015-11-18 11:19:23.000000000 +0100
> +++ gcc/tree-ssa-math-opts.c 2015-11-24 17:00:10.825900958 +0100
> @@ -3491,6 +3491,189 @@ convert_mult_to_fma (gimple *mul_stmt, t
> return true;
> }
>
> +
> +/* Helper function of match_uaddsub_overflow. Return 1
> + if USE_STMT is unsigned overflow check ovf != 0 for
> + STMT, -1 if USE_STMT is unsigned overflow check ovf == 0
> + and 0 otherwise. */
> +
> +static int
> +uaddsub_overflow_check_p (gimple *stmt, gimple *use_stmt)
> +{
> + enum tree_code ccode = ERROR_MARK;
> + tree crhs1 = NULL_TREE, crhs2 = NULL_TREE;
> + if (gimple_code (use_stmt) == GIMPLE_COND)
> + {
> + ccode = gimple_cond_code (use_stmt);
> + crhs1 = gimple_cond_lhs (use_stmt);
> + crhs2 = gimple_cond_rhs (use_stmt);
> + }
> + else if (is_gimple_assign (use_stmt))
> + {
> + if (gimple_assign_rhs_class (use_stmt) == GIMPLE_BINARY_RHS)
> + {
> + ccode = gimple_assign_rhs_code (use_stmt);
> + crhs1 = gimple_assign_rhs1 (use_stmt);
> + crhs2 = gimple_assign_rhs2 (use_stmt);
> + }
> + else if (gimple_assign_rhs_code (use_stmt) == COND_EXPR)
> + {
> + tree cond = gimple_assign_rhs1 (use_stmt);
> + if (COMPARISON_CLASS_P (cond))
> + {
> + ccode = TREE_CODE (cond);
> + crhs1 = TREE_OPERAND (cond, 0);
> + crhs2 = TREE_OPERAND (cond, 1);
> + }
> + else
> + return 0;
> + }
> + else
> + return 0;
> + }
> + else
> + return 0;
> +
> + if (TREE_CODE_CLASS (ccode) != tcc_comparison)
> + return 0;
> +
> + enum tree_code code = gimple_assign_rhs_code (stmt);
> + tree lhs = gimple_assign_lhs (stmt);
> + tree rhs1 = gimple_assign_rhs1 (stmt);
> + tree rhs2 = gimple_assign_rhs2 (stmt);
> +
> + switch (ccode)
> + {
> + case GT_EXPR:
> + case LE_EXPR:
> + /* r = a - b; r > a or r <= a
> + r = a + b; a > r or a <= r or b > r or b <= r. */
> + if ((code == MINUS_EXPR && crhs1 == lhs && crhs2 == rhs1)
> + || (code == PLUS_EXPR && (crhs1 == rhs1 || crhs1 == rhs2)
> + && crhs2 == lhs))
> + return ccode == GT_EXPR ? 1 : -1;
> + break;
> + case LT_EXPR:
> + case GE_EXPR:
> + /* r = a - b; a < r or a >= r
> + r = a + b; r < a or r >= a or r < b or r >= b. */
> + if ((code == MINUS_EXPR && crhs1 == rhs1 && crhs2 == lhs)
> + || (code == PLUS_EXPR && crhs1 == lhs
> + && (crhs2 == rhs1 || crhs2 == rhs2)))
> + return ccode == LT_EXPR ? 1 : -1;
> + break;
> + default:
> + break;
> + }
> + return 0;
> +}
> +
> +/* Recognize for unsigned x
> + x = y - z;
> + if (x > y)
> + where there are other uses of x and replace it with
> + _7 = SUB_OVERFLOW (y, z);
> + x = REALPART_EXPR <_7>;
> + _8 = IMAGPART_EXPR <_7>;
> + if (_8)
> + and similarly for addition. */
> +
> +static bool
> +match_uaddsub_overflow (gimple_stmt_iterator *gsi, gimple *stmt,
> + enum tree_code code)
> +{
> + tree lhs = gimple_assign_lhs (stmt);
> + tree type = TREE_TYPE (lhs);
> + use_operand_p use_p;
> + imm_use_iterator iter;
> + bool use_seen = false;
> + bool ovf_use_seen = false;
> + gimple *use_stmt;
> +
> + gcc_checking_assert (code == PLUS_EXPR || code == MINUS_EXPR);
> + if (!INTEGRAL_TYPE_P (type)
> + || !TYPE_UNSIGNED (type)
> + || has_zero_uses (lhs)
> + || has_single_use (lhs)
> + || optab_handler (code == PLUS_EXPR ? uaddv4_optab : usubv4_optab,
> + TYPE_MODE (type)) == CODE_FOR_nothing)
> + return false;
> +
> + FOR_EACH_IMM_USE_FAST (use_p, iter, lhs)
> + {
> + use_stmt = USE_STMT (use_p);
> + if (is_gimple_debug (use_stmt))
> + continue;
> +
> + if (uaddsub_overflow_check_p (stmt, use_stmt))
> + ovf_use_seen = true;
> + else
> + use_seen = true;
> + if (ovf_use_seen && use_seen)
> + break;
> + }
> +
> + if (!ovf_use_seen || !use_seen)
> + return false;
> +
> + tree ctype = build_complex_type (type);
> + tree rhs1 = gimple_assign_rhs1 (stmt);
> + tree rhs2 = gimple_assign_rhs2 (stmt);
> + gcall *g = gimple_build_call_internal (code == PLUS_EXPR
> + ? IFN_ADD_OVERFLOW : IFN_SUB_OVERFLOW,
> + 2, rhs1, rhs2);
> + tree ctmp = make_ssa_name (ctype);
> + gimple_call_set_lhs (g, ctmp);
> + gsi_insert_before (gsi, g, GSI_SAME_STMT);
> + gassign *g2 = gimple_build_assign (lhs, REALPART_EXPR,
> + build1 (REALPART_EXPR, type, ctmp));
> + gsi_replace (gsi, g2, true);
> + tree ovf = make_ssa_name (type);
> + g2 = gimple_build_assign (ovf, IMAGPART_EXPR,
> + build1 (IMAGPART_EXPR, type, ctmp));
> + gsi_insert_after (gsi, g2, GSI_NEW_STMT);
> +
> + FOR_EACH_IMM_USE_STMT (use_stmt, iter, lhs)
> + {
> + if (is_gimple_debug (use_stmt))
> + continue;
> +
> + int ovf_use = uaddsub_overflow_check_p (stmt, use_stmt);
> + if (ovf_use == 0)
> + continue;
> + if (gimple_code (use_stmt) == GIMPLE_COND)
> + {
> + gcond *cond_stmt = as_a <gcond *> (use_stmt);
> + gimple_cond_set_lhs (cond_stmt, ovf);
> + gimple_cond_set_rhs (cond_stmt, build_int_cst (type, 0));
> + gimple_cond_set_code (cond_stmt, ovf_use == 1 ? NE_EXPR : EQ_EXPR);
> + }
> + else
> + {
> + gcc_checking_assert (is_gimple_assign (use_stmt));
> + if (gimple_assign_rhs_class (use_stmt) == GIMPLE_BINARY_RHS)
> + {
> + gimple_assign_set_rhs1 (use_stmt, ovf);
> + gimple_assign_set_rhs2 (use_stmt, build_int_cst (type, 0));
> + gimple_assign_set_rhs_code (use_stmt,
> + ovf_use == 1 ? NE_EXPR : EQ_EXPR);
> + }
> + else
> + {
> + gcc_checking_assert (gimple_assign_rhs_code (use_stmt)
> + == COND_EXPR);
> + tree cond = build2 (ovf_use == 1 ? NE_EXPR : EQ_EXPR,
> + boolean_type_node, ovf,
> + build_int_cst (type, 0));
> + gimple_assign_set_rhs1 (use_stmt, cond);
> + }
> + }
> + update_stmt (use_stmt);
> + }
> + return true;
> +}
> +
> +
> /* Find integer multiplications where the operands are extended from
> smaller types, and replace the MULT_EXPR with a WIDEN_MULT_EXPR
> where appropriate. */
> @@ -3563,7 +3746,8 @@ pass_optimize_widening_mul::execute (fun
>
> case PLUS_EXPR:
> case MINUS_EXPR:
> - convert_plusminus_to_widen (&gsi, stmt, code);
> + if (!convert_plusminus_to_widen (&gsi, stmt, code))
> + match_uaddsub_overflow (&gsi, stmt, code);
> break;
>
> default:;
> --- gcc/testsuite/gcc.dg/pr67089-1.c.jj 2015-11-24 18:16:30.817446026
> +0100
> +++ gcc/testsuite/gcc.dg/pr67089-1.c 2015-11-24 19:03:41.302284096 +0100
> @@ -0,0 +1,112 @@
> +/* PR target/67089 */
> +/* { dg-do run } */
> +/* { dg-options "-O2" } */
> +
> +extern void abort (void);
> +
> +int cnt, d;
> +
> +__attribute__((noinline, noclone))
> +void foo (int x)
> +{
> + asm volatile ("" : "+m" (d) : "g" (x) : "memory");
> + cnt++;
> +}
> +
> +#define T(n, type, op, cond) \
> +__attribute__((noinline, noclone)) \
> +type \
> +f##n (type x, type y) \
> +{ \
> + type r = op; \
> + cond; \
> + return r; \
> +}
> +
> +T (1, unsigned int, x - y, if (r > x) foo (0))
> +T (2, unsigned long, x - y, if (r <= x) foo (0))
> +T (3, unsigned short, x - y, if (x < r) foo (r))
> +T (4, unsigned long long, x - y, if (x >= r) foo (0))
> +T (5, unsigned int, x - y, if (r >= x) foo (0))
> +T (6, unsigned long, x - y, if (r < x) foo (0))
> +T (7, unsigned short, x - y, if (x <= r) foo (r))
> +T (8, unsigned long long, x - y, if (d || x > r) foo (0))
> +T (9, unsigned int, x - y, if (d || r > x) foo (0))
> +T (10, unsigned long, x - y, if (d || r <= x) foo (0))
> +T (11, unsigned char, x - y, if (d || x < r) foo (0))
> +T (12, unsigned long long, x - y, if (d || x >= r) foo (0))
> +T (13, unsigned int, x - y, if (d || r >= x) foo (0))
> +T (14, unsigned long, x - y, if (d || r < x) foo (0))
> +T (15, unsigned short, x - y, if (d || x <= r) foo (0))
> +T (16, unsigned long long, x - y, if (d || x > r) foo (0))
> +
> +int
> +main ()
> +{
> + if (f1 (5, 3) != 2U || cnt != 0) abort ();
> + if (f1 (5, 7) != -2U || cnt != 1) abort ();
> + if (f1 (5, 5) != 0U || cnt != 1) abort ();
> + if (f1 (5, 0) != 5U || cnt != 1) abort ();
> + if (f2 (7, 1) != 6UL || cnt != 2) abort ();
> + if (f2 (7, 8) != -1UL || cnt != 2) abort ();
> + if (f2 (9, 9) != 0UL || cnt != 3) abort ();
> + if (f2 (9, 0) != 9UL || cnt != 4) abort ();
> + if (f3 (15, 14) != 1 || cnt != 4) abort ();
> + if (f3 (15, 25) != (unsigned short) -10 || cnt != 5) abort ();
> + if (f3 (15, 15) != 0 || cnt != 5) abort ();
> + if (f3 (15, 0) != 15 || cnt != 5) abort ();
> + if (f4 (9132, 9127) != 5ULL || cnt != 6) abort ();
> + if (f4 (9132, 9137) != -5ULL || cnt != 6) abort ();
> + if (f4 (9132, 9132) != 0 || cnt != 7) abort ();
> + if (f4 (9132, 0) != 9132ULL || cnt != 8) abort ();
> + if (f5 (5, 3) != 2U || cnt != 8) abort ();
> + if (f5 (5, 7) != -2U || cnt != 9) abort ();
> + if (f5 (5, 5) != 0U || cnt != 9) abort ();
> + if (f5 (5, 0) != 5U || cnt != 10) abort ();
> + if (f6 (7, 1) != 6UL || cnt != 11) abort ();
> + if (f6 (7, 8) != -1UL || cnt != 11) abort ();
> + if (f6 (9, 9) != 0UL || cnt != 12) abort ();
> + if (f6 (9, 0) != 9UL || cnt != 12) abort ();
> + if (f7 (15, 14) != 1 || cnt != 12) abort ();
> + if (f7 (15, 25) != (unsigned short) -10 || cnt != 13) abort ();
> + if (f7 (15, 15) != 0 || cnt != 13) abort ();
> + if (f7 (15, 0) != 15 || cnt != 14) abort ();
> + if (f8 (9132, 9127) != 5ULL || cnt != 15) abort ();
> + if (f8 (9132, 9137) != -5ULL || cnt != 15) abort ();
> + if (f8 (9132, 9132) != 0 || cnt != 16) abort ();
> + if (f8 (9132, 0) != 9132ULL || cnt != 16) abort ();
> + cnt = 0;
> + if (f9 (5, 3) != 2U || cnt != 0) abort ();
> + if (f9 (5, 7) != -2U || cnt != 1) abort ();
> + if (f9 (5, 5) != 0U || cnt != 1) abort ();
> + if (f9 (5, 0) != 5U || cnt != 1) abort ();
> + if (f10 (7, 1) != 6UL || cnt != 2) abort ();
> + if (f10 (7, 8) != -1UL || cnt != 2) abort ();
> + if (f10 (9, 9) != 0UL || cnt != 3) abort ();
> + if (f10 (9, 0) != 9UL || cnt != 4) abort ();
> + if (f11 (15, 14) != 1 || cnt != 4) abort ();
> + if (f11 (15, 25) != (unsigned char) -10 || cnt != 5) abort ();
> + if (f11 (15, 15) != 0 || cnt != 5) abort ();
> + if (f11 (15, 0) != 15 || cnt != 5) abort ();
> + if (f12 (9132, 9127) != 5ULL || cnt != 6) abort ();
> + if (f12 (9132, 9137) != -5ULL || cnt != 6) abort ();
> + if (f12 (9132, 9132) != 0 || cnt != 7) abort ();
> + if (f12 (9132, 0) != 9132ULL || cnt != 8) abort ();
> + if (f13 (5, 3) != 2U || cnt != 8) abort ();
> + if (f13 (5, 7) != -2U || cnt != 9) abort ();
> + if (f13 (5, 5) != 0U || cnt != 9) abort ();
> + if (f13 (5, 0) != 5U || cnt != 10) abort ();
> + if (f14 (7, 1) != 6UL || cnt != 11) abort ();
> + if (f14 (7, 8) != -1UL || cnt != 11) abort ();
> + if (f14 (9, 9) != 0UL || cnt != 12) abort ();
> + if (f14 (9, 0) != 9UL || cnt != 12) abort ();
> + if (f15 (15, 14) != 1 || cnt != 12) abort ();
> + if (f15 (15, 25) != (unsigned short) -10 || cnt != 13) abort ();
> + if (f15 (15, 15) != 0 || cnt != 13) abort ();
> + if (f15 (15, 0) != 15 || cnt != 14) abort ();
> + if (f16 (9132, 9127) != 5ULL || cnt != 15) abort ();
> + if (f16 (9132, 9137) != -5ULL || cnt != 15) abort ();
> + if (f16 (9132, 9132) != 0 || cnt != 16) abort ();
> + if (f16 (9132, 0) != 9132ULL || cnt != 16) abort ();
> + return 0;
> +}
> --- gcc/testsuite/gcc.dg/pr67089-2.c.jj 2015-11-24 18:18:51.804434548
> +0100
> +++ gcc/testsuite/gcc.dg/pr67089-2.c 2015-11-24 19:03:44.769234628 +0100
> @@ -0,0 +1,112 @@
> +/* PR target/67089 */
> +/* { dg-do run } */
> +/* { dg-options "-O2" } */
> +
> +extern void abort (void);
> +
> +int cnt, d;
> +
> +__attribute__((noinline, noclone))
> +void foo (int x)
> +{
> + asm volatile ("" : "+m" (d) : "g" (x) : "memory");
> + cnt++;
> +}
> +
> +#define T(n, type, op, cond) \
> +__attribute__((noinline, noclone)) \
> +type \
> +f##n (type x, type y) \
> +{ \
> + type r = op; \
> + cond; \
> + return r; \
> +}
> +
> +T (1, unsigned int, x - y, if (r > y) foo (0))
> +T (2, unsigned long, x - y, if (r <= y) foo (0))
> +T (3, unsigned short, x - y, if (y < r) foo (r))
> +T (4, unsigned long long, x - y, if (y >= r) foo (0))
> +T (5, unsigned int, x - y, if (r >= y) foo (0))
> +T (6, unsigned long, x - y, if (r < y) foo (0))
> +T (7, unsigned short, x - y, if (y <= r) foo (r))
> +T (8, unsigned long long, x - y, if (d || y > r) foo (0))
> +T (9, unsigned int, x - y, if (d || r > y) foo (0))
> +T (10, unsigned long, x - y, if (d || r <= y) foo (0))
> +T (11, unsigned char, x - y, if (d || y < r) foo (0))
> +T (12, unsigned long long, x - y, if (d || y >= r) foo (0))
> +T (13, unsigned int, x - y, if (d || r >= y) foo (0))
> +T (14, unsigned long, x - y, if (d || r < y) foo (0))
> +T (15, unsigned short, x - y, if (d || y <= r) foo (0))
> +T (16, unsigned long long, x - y, if (d || y > r) foo (0))
> +
> +int
> +main ()
> +{
> + if (f1 (5, 3) != 2U || cnt != 0) abort ();
> + if (f1 (5, 7) != -2U || cnt != 1) abort ();
> + if (f1 (5, 5) != 0U || cnt != 1) abort ();
> + if (f1 (5, 0) != 5U || cnt != 2) abort ();
> + if (f2 (7, 1) != 6UL || cnt != 2) abort ();
> + if (f2 (7, 8) != -1UL || cnt != 2) abort ();
> + if (f2 (9, 9) != 0UL || cnt != 3) abort ();
> + if (f2 (9, 0) != 9UL || cnt != 3) abort ();
> + if (f3 (15, 14) != 1 || cnt != 3) abort ();
> + if (f3 (15, 25) != (unsigned short) -10 || cnt != 4) abort ();
> + if (f3 (15, 15) != 0 || cnt != 4) abort ();
> + if (f3 (15, 0) != 15 || cnt != 5) abort ();
> + if (f4 (9132, 9127) != 5ULL || cnt != 6) abort ();
> + if (f4 (9132, 9137) != -5ULL || cnt != 6) abort ();
> + if (f4 (9132, 9132) != 0 || cnt != 7) abort ();
> + if (f4 (9132, 0) != 9132ULL || cnt != 7) abort ();
> + if (f5 (5, 3) != 2U || cnt != 7) abort ();
> + if (f5 (5, 7) != -2U || cnt != 8) abort ();
> + if (f5 (5, 5) != 0U || cnt != 8) abort ();
> + if (f5 (5, 0) != 5U || cnt != 9) abort ();
> + if (f6 (7, 1) != 6UL || cnt != 9) abort ();
> + if (f6 (7, 8) != -1UL || cnt != 9) abort ();
> + if (f6 (9, 9) != 0UL || cnt != 10) abort ();
> + if (f6 (9, 0) != 9UL || cnt != 10) abort ();
> + if (f7 (15, 14) != 1 || cnt != 10) abort ();
> + if (f7 (15, 25) != (unsigned short) -10 || cnt != 11) abort ();
> + if (f7 (15, 15) != 0 || cnt != 11) abort ();
> + if (f7 (15, 0) != 15 || cnt != 12) abort ();
> + if (f8 (9132, 9127) != 5ULL || cnt != 13) abort ();
> + if (f8 (9132, 9137) != -5ULL || cnt != 13) abort ();
> + if (f8 (9132, 9132) != 0 || cnt != 14) abort ();
> + if (f8 (9132, 0) != 9132ULL || cnt != 14) abort ();
> + cnt = 0;
> + if (f9 (5, 3) != 2U || cnt != 0) abort ();
> + if (f9 (5, 7) != -2U || cnt != 1) abort ();
> + if (f9 (5, 5) != 0U || cnt != 1) abort ();
> + if (f9 (5, 0) != 5U || cnt != 2) abort ();
> + if (f10 (7, 1) != 6UL || cnt != 2) abort ();
> + if (f10 (7, 8) != -1UL || cnt != 2) abort ();
> + if (f10 (9, 9) != 0UL || cnt != 3) abort ();
> + if (f10 (9, 0) != 9UL || cnt != 3) abort ();
> + if (f11 (15, 14) != 1 || cnt != 3) abort ();
> + if (f11 (15, 25) != (unsigned char) -10 || cnt != 4) abort ();
> + if (f11 (15, 15) != 0 || cnt != 4) abort ();
> + if (f11 (15, 0) != 15 || cnt != 5) abort ();
> + if (f12 (9132, 9127) != 5ULL || cnt != 6) abort ();
> + if (f12 (9132, 9137) != -5ULL || cnt != 6) abort ();
> + if (f12 (9132, 9132) != 0 || cnt != 7) abort ();
> + if (f12 (9132, 0) != 9132ULL || cnt != 7) abort ();
> + if (f13 (5, 3) != 2U || cnt != 7) abort ();
> + if (f13 (5, 7) != -2U || cnt != 8) abort ();
> + if (f13 (5, 5) != 0U || cnt != 8) abort ();
> + if (f13 (5, 0) != 5U || cnt != 9) abort ();
> + if (f14 (7, 1) != 6UL || cnt != 9) abort ();
> + if (f14 (7, 8) != -1UL || cnt != 9) abort ();
> + if (f14 (9, 9) != 0UL || cnt != 10) abort ();
> + if (f14 (9, 0) != 9UL || cnt != 10) abort ();
> + if (f15 (15, 14) != 1 || cnt != 10) abort ();
> + if (f15 (15, 25) != (unsigned short) -10 || cnt != 11) abort ();
> + if (f15 (15, 15) != 0 || cnt != 11) abort ();
> + if (f15 (15, 0) != 15 || cnt != 12) abort ();
> + if (f16 (9132, 9127) != 5ULL || cnt != 13) abort ();
> + if (f16 (9132, 9137) != -5ULL || cnt != 13) abort ();
> + if (f16 (9132, 9132) != 0 || cnt != 14) abort ();
> + if (f16 (9132, 0) != 9132ULL || cnt != 14) abort ();
> + return 0;
> +}
> --- gcc/testsuite/gcc.dg/pr67089-3.c.jj 2015-11-24 18:28:05.788530792
> +0100
> +++ gcc/testsuite/gcc.dg/pr67089-3.c 2015-11-24 19:03:48.375183177 +0100
> @@ -0,0 +1,112 @@
> +/* PR target/67089 */
> +/* { dg-do run } */
> +/* { dg-options "-O2" } */
> +
> +extern void abort (void);
> +
> +int cnt, d;
> +
> +__attribute__((noinline, noclone))
> +void foo (int x)
> +{
> + asm volatile ("" : "+m" (d) : "g" (x) : "memory");
> + cnt++;
> +}
> +
> +#define T(n, type, op, cond) \
> +__attribute__((noinline, noclone)) \
> +type \
> +f##n (type x, type y) \
> +{ \
> + type r = op; \
> + cond; \
> + return r; \
> +}
> +
> +T (1, unsigned int, x + y, if (r > x) foo (0))
> +T (2, unsigned long, x + y, if (r <= x) foo (0))
> +T (3, unsigned short, x + y, if (x < r) foo (r))
> +T (4, unsigned long long, x + y, if (x >= r) foo (0))
> +T (5, unsigned int, x + y, if (r >= x) foo (0))
> +T (6, unsigned long, x + y, if (r < x) foo (0))
> +T (7, unsigned short, x + y, if (x <= r) foo (r))
> +T (8, unsigned long long, x + y, if (d || x > r) foo (0))
> +T (9, unsigned int, x + y, if (d || r > x) foo (0))
> +T (10, unsigned long, x + y, if (d || r <= x) foo (0))
> +T (11, unsigned char, x + y, if (d || x < r) foo (0))
> +T (12, unsigned long long, x + y, if (d || x >= r) foo (0))
> +T (13, unsigned int, x + y, if (d || r >= x) foo (0))
> +T (14, unsigned long, x + y, if (d || r < x) foo (0))
> +T (15, unsigned short, x + y, if (d || x <= r) foo (0))
> +T (16, unsigned long long, x + y, if (d || x > r) foo (0))
> +
> +int
> +main ()
> +{
> + if (f1 (-7U, 0) != -7U || cnt != 0) abort ();
> + if (f1 (-7U, 6) != -1U || cnt != 1) abort ();
> + if (f1 (-7U, 7) != 0U || cnt != 1) abort ();
> + if (f1 (-7U, 8) != 1U || cnt != 1) abort ();
> + if (f2 (-9UL, 0) != -9UL || cnt != 2) abort ();
> + if (f2 (-9UL, 8) != -1UL || cnt != 2) abort ();
> + if (f2 (-9UL, 9) != 0UL || cnt != 3) abort ();
> + if (f2 (-9UL, 10) != 1UL || cnt != 4) abort ();
> + if (f3 (-15, 0) != (unsigned short) -15 || cnt != 4) abort ();
> + if (f3 (-15, 14) != (unsigned short) -1 || cnt != 5) abort ();
> + if (f3 (-15, 15) != 0 || cnt != 5) abort ();
> + if (f3 (-15, 16) != 1 || cnt != 5) abort ();
> + if (f4 (-9132ULL, 0) != -9132ULL || cnt != 6) abort ();
> + if (f4 (-9132ULL, 9131) != -1ULL || cnt != 6) abort ();
> + if (f4 (-9132ULL, 9132) != 0 || cnt != 7) abort ();
> + if (f4 (-9132ULL, 9133) != 1ULL || cnt != 8) abort ();
> + if (f5 (-7U, 0) != -7U || cnt != 9) abort ();
> + if (f5 (-7U, 6) != -1U || cnt != 10) abort ();
> + if (f5 (-7U, 7) != 0U || cnt != 10) abort ();
> + if (f5 (-7U, 8) != 1U || cnt != 10) abort ();
> + if (f6 (-9UL, 0) != -9UL || cnt != 10) abort ();
> + if (f6 (-9UL, 8) != -1UL || cnt != 10) abort ();
> + if (f6 (-9UL, 9) != 0UL || cnt != 11) abort ();
> + if (f6 (-9UL, 10) != 1UL || cnt != 12) abort ();
> + if (f7 (-15, 0) != (unsigned short) -15 || cnt != 13) abort ();
> + if (f7 (-15, 14) != (unsigned short) -1 || cnt != 14) abort ();
> + if (f7 (-15, 15) != 0 || cnt != 14) abort ();
> + if (f7 (-15, 16) != 1 || cnt != 14) abort ();
> + if (f8 (-9132ULL, 0) != -9132ULL || cnt != 14) abort ();
> + if (f8 (-9132ULL, 9131) != -1ULL || cnt != 14) abort ();
> + if (f8 (-9132ULL, 9132) != 0 || cnt != 15) abort ();
> + if (f8 (-9132ULL, 9133) != 1ULL || cnt != 16) abort ();
> + cnt = 0;
> + if (f9 (-7U, 0) != -7U || cnt != 0) abort ();
> + if (f9 (-7U, 6) != -1U || cnt != 1) abort ();
> + if (f9 (-7U, 7) != 0U || cnt != 1) abort ();
> + if (f9 (-7U, 8) != 1U || cnt != 1) abort ();
> + if (f10 (-9UL, 0) != -9UL || cnt != 2) abort ();
> + if (f10 (-9UL, 8) != -1UL || cnt != 2) abort ();
> + if (f10 (-9UL, 9) != 0UL || cnt != 3) abort ();
> + if (f10 (-9UL, 10) != 1UL || cnt != 4) abort ();
> + if (f11 (-15, 0) != (unsigned char) -15 || cnt != 4) abort ();
> + if (f11 (-15, 14) != (unsigned char) -1 || cnt != 5) abort ();
> + if (f11 (-15, 15) != 0 || cnt != 5) abort ();
> + if (f11 (-15, 16) != 1 || cnt != 5) abort ();
> + if (f12 (-9132ULL, 0) != -9132ULL || cnt != 6) abort ();
> + if (f12 (-9132ULL, 9131) != -1ULL || cnt != 6) abort ();
> + if (f12 (-9132ULL, 9132) != 0 || cnt != 7) abort ();
> + if (f12 (-9132ULL, 9133) != 1ULL || cnt != 8) abort ();
> + if (f13 (-7U, 0) != -7U || cnt != 9) abort ();
> + if (f13 (-7U, 6) != -1U || cnt != 10) abort ();
> + if (f13 (-7U, 7) != 0U || cnt != 10) abort ();
> + if (f13 (-7U, 8) != 1U || cnt != 10) abort ();
> + if (f14 (-9UL, 0) != -9UL || cnt != 10) abort ();
> + if (f14 (-9UL, 8) != -1UL || cnt != 10) abort ();
> + if (f14 (-9UL, 9) != 0UL || cnt != 11) abort ();
> + if (f14 (-9UL, 10) != 1UL || cnt != 12) abort ();
> + if (f15 (-15, 0) != (unsigned short) -15 || cnt != 13) abort ();
> + if (f15 (-15, 14) != (unsigned short) -1 || cnt != 14) abort ();
> + if (f15 (-15, 15) != 0 || cnt != 14) abort ();
> + if (f15 (-15, 16) != 1 || cnt != 14) abort ();
> + if (f16 (-9132ULL, 0) != -9132ULL || cnt != 14) abort ();
> + if (f16 (-9132ULL, 9131) != -1ULL || cnt != 14) abort ();
> + if (f16 (-9132ULL, 9132) != 0 || cnt != 15) abort ();
> + if (f16 (-9132ULL, 9133) != 1ULL || cnt != 16) abort ();
> + return 0;
> +}
> --- gcc/testsuite/gcc.dg/pr67089-4.c.jj 2015-11-24 18:42:04.482600934
> +0100
> +++ gcc/testsuite/gcc.dg/pr67089-4.c 2015-11-24 19:15:19.155412082 +0100
> @@ -0,0 +1,112 @@
> +/* PR target/67089 */
> +/* { dg-do run } */
> +/* { dg-options "-O2" } */
> +
> +extern void abort (void);
> +
> +int cnt, d;
> +
> +__attribute__((noinline, noclone))
> +void foo (int x)
> +{
> + asm volatile ("" : "+m" (d) : "g" (x) : "memory");
> + cnt++;
> +}
> +
> +#define T(n, type, op, cond) \
> +__attribute__((noinline, noclone)) \
> +type \
> +f##n (type x, type y) \
> +{ \
> + type r = op; \
> + cond; \
> + return r; \
> +}
> +
> +T (1, unsigned int, x + y, if (r > y) foo (0))
> +T (2, unsigned long, x + y, if (r <= y) foo (0))
> +T (3, unsigned short, x + y, if (y < r) foo (r))
> +T (4, unsigned long long, x + y, if (y >= r) foo (0))
> +T (5, unsigned int, x + y, if (r >= y) foo (0))
> +T (6, unsigned long, x + y, if (r < y) foo (0))
> +T (7, unsigned short, x + y, if (y <= r) foo (r))
> +T (8, unsigned long long, x + y, if (d || y > r) foo (0))
> +T (9, unsigned int, x + y, if (d || r > y) foo (0))
> +T (10, unsigned long, x + y, if (d || r <= y) foo (0))
> +T (11, unsigned char, x + y, if (d || y < r) foo (0))
> +T (12, unsigned long long, x + y, if (d || y >= r) foo (0))
> +T (13, unsigned int, x + y, if (d || r >= y) foo (0))
> +T (14, unsigned long, x + y, if (d || r < y) foo (0))
> +T (15, unsigned short, x + y, if (d || y <= r) foo (0))
> +T (16, unsigned long long, x + y, if (d || y > r) foo (0))
> +
> +int
> +main ()
> +{
> + if (f1 (-7U, 0) != -7U || cnt != 1) abort ();
> + if (f1 (-7U, 6) != -1U || cnt != 2) abort ();
> + if (f1 (-7U, 7) != 0U || cnt != 2) abort ();
> + if (f1 (-7U, 8) != 1U || cnt != 2) abort ();
> + if (f2 (-9UL, 0) != -9UL || cnt != 2) abort ();
> + if (f2 (-9UL, 8) != -1UL || cnt != 2) abort ();
> + if (f2 (-9UL, 9) != 0UL || cnt != 3) abort ();
> + if (f2 (-9UL, 10) != 1UL || cnt != 4) abort ();
> + if (f3 (-15, 0) != (unsigned short) -15 || cnt != 5) abort ();
> + if (f3 (-15, 14) != (unsigned short) -1 || cnt != 6) abort ();
> + if (f3 (-15, 15) != 0 || cnt != 6) abort ();
> + if (f3 (-15, 16) != 1 || cnt != 6) abort ();
> + if (f4 (-9132ULL, 0) != -9132ULL || cnt != 6) abort ();
> + if (f4 (-9132ULL, 9131) != -1ULL || cnt != 6) abort ();
> + if (f4 (-9132ULL, 9132) != 0 || cnt != 7) abort ();
> + if (f4 (-9132ULL, 9133) != 1ULL || cnt != 8) abort ();
> + if (f5 (-7U, 0) != -7U || cnt != 9) abort ();
> + if (f5 (-7U, 6) != -1U || cnt != 10) abort ();
> + if (f5 (-7U, 7) != 0U || cnt != 10) abort ();
> + if (f5 (-7U, 8) != 1U || cnt != 10) abort ();
> + if (f6 (-9UL, 0) != -9UL || cnt != 10) abort ();
> + if (f6 (-9UL, 8) != -1UL || cnt != 10) abort ();
> + if (f6 (-9UL, 9) != 0UL || cnt != 11) abort ();
> + if (f6 (-9UL, 10) != 1UL || cnt != 12) abort ();
> + if (f7 (-15, 0) != (unsigned short) -15 || cnt != 13) abort ();
> + if (f7 (-15, 14) != (unsigned short) -1 || cnt != 14) abort ();
> + if (f7 (-15, 15) != 0 || cnt != 14) abort ();
> + if (f7 (-15, 16) != 1 || cnt != 14) abort ();
> + if (f8 (-9132ULL, 0) != -9132ULL || cnt != 14) abort ();
> + if (f8 (-9132ULL, 9131) != -1ULL || cnt != 14) abort ();
> + if (f8 (-9132ULL, 9132) != 0 || cnt != 15) abort ();
> + if (f8 (-9132ULL, 9133) != 1ULL || cnt != 16) abort ();
> + cnt = 0;
> + if (f9 (-7U, 0) != -7U || cnt != 1) abort ();
> + if (f9 (-7U, 6) != -1U || cnt != 2) abort ();
> + if (f9 (-7U, 7) != 0U || cnt != 2) abort ();
> + if (f9 (-7U, 8) != 1U || cnt != 2) abort ();
> + if (f10 (-9UL, 0) != -9UL || cnt != 2) abort ();
> + if (f10 (-9UL, 8) != -1UL || cnt != 2) abort ();
> + if (f10 (-9UL, 9) != 0UL || cnt != 3) abort ();
> + if (f10 (-9UL, 10) != 1UL || cnt != 4) abort ();
> + if (f11 (-15, 0) != (unsigned char) -15 || cnt != 5) abort ();
> + if (f11 (-15, 14) != (unsigned char) -1 || cnt != 6) abort ();
> + if (f11 (-15, 15) != 0 || cnt != 6) abort ();
> + if (f11 (-15, 16) != 1 || cnt != 6) abort ();
> + if (f12 (-9132ULL, 0) != -9132ULL || cnt != 6) abort ();
> + if (f12 (-9132ULL, 9131) != -1ULL || cnt != 6) abort ();
> + if (f12 (-9132ULL, 9132) != 0 || cnt != 7) abort ();
> + if (f12 (-9132ULL, 9133) != 1ULL || cnt != 8) abort ();
> + if (f13 (-7U, 0) != -7U || cnt != 9) abort ();
> + if (f13 (-7U, 6) != -1U || cnt != 10) abort ();
> + if (f13 (-7U, 7) != 0U || cnt != 10) abort ();
> + if (f13 (-7U, 8) != 1U || cnt != 10) abort ();
> + if (f14 (-9UL, 0) != -9UL || cnt != 10) abort ();
> + if (f14 (-9UL, 8) != -1UL || cnt != 10) abort ();
> + if (f14 (-9UL, 9) != 0UL || cnt != 11) abort ();
> + if (f14 (-9UL, 10) != 1UL || cnt != 12) abort ();
> + if (f15 (-15, 0) != (unsigned short) -15 || cnt != 13) abort ();
> + if (f15 (-15, 14) != (unsigned short) -1 || cnt != 14) abort ();
> + if (f15 (-15, 15) != 0 || cnt != 14) abort ();
> + if (f15 (-15, 16) != 1 || cnt != 14) abort ();
> + if (f16 (-9132ULL, 0) != -9132ULL || cnt != 14) abort ();
> + if (f16 (-9132ULL, 9131) != -1ULL || cnt != 14) abort ();
> + if (f16 (-9132ULL, 9132) != 0 || cnt != 15) abort ();
> + if (f16 (-9132ULL, 9133) != 1ULL || cnt != 16) abort ();
> + return 0;
> +}
> --- gcc/testsuite/gcc.dg/pr67089-5.c.jj 2015-11-24 19:03:19.571594157
> +0100
> +++ gcc/testsuite/gcc.dg/pr67089-5.c 2015-11-24 19:31:29.707645365 +0100
> @@ -0,0 +1,82 @@
> +/* PR target/67089 */
> +/* { dg-do run } */
> +/* { dg-options "-O2 -ftree-loop-if-convert" } */
> +
> +extern void abort (void);
> +
> +int cnt;
> +unsigned int a[16], b[16], c[16];
> +
> +__attribute__((noinline, noclone))
> +void foo (int x)
> +{
> + asm volatile ("" : : "g" (x) : "memory");
> + cnt++;
> +}
> +
> +__attribute__((noinline, noclone)) void
> +f0 (unsigned int x)
> +{
> + for (int i = 0; i < 16; i++)
> + {
> + unsigned int r = x - a[i];
> + b[i] = r;
> + c[i] = r > x ? 7 : x;
> + }
> +}
> +
> +#define T(n, type, op, cond) \
> +__attribute__((noinline, noclone)) \
> +type \
> +f##n (type x) \
> +{ \
> + type r = op; \
> + cond; \
> + return r; \
> +}
> +
> +T (1, unsigned int, x - 2U, if (r > x) foo (0))
> +T (2, unsigned long, x - 2U, if (r <= x) foo (0))
> +T (3, unsigned short, 2U - x, if (r > 2U) foo (0))
> +T (4, unsigned char, 2U - x, if (r <= 2U) foo (0))
> +T (5, unsigned int, x + -2U, if (r > x) foo (0))
> +T (6, unsigned long, x + -2UL, if (r <= x) foo (0))
> +T (7, unsigned short, (unsigned short) -2 + x, if (r > (unsigned short) -2)
> foo (0))
> +T (8, unsigned char, (unsigned char) -2 + x, if (r <= (unsigned char) -2)
> foo (0))
> +
> +int
> +main ()
> +{
> + int i;
> + for (i = 0; i < 16; i++)
> + a[i] = i - 7;
> + f0 (5);
> + for (i = 0; i < 16; i++)
> + if (b[i] != 12U - i || c[i] != 7 - 2 * (i >= 7 && i < 13))
> + abort ();
> + if (f1 (3) != 1 || cnt != 0) abort ();
> + if (f1 (2) != 0 || cnt != 0) abort ();
> + if (f1 (1) != -1U || cnt != 1) abort ();
> + if (f2 (3) != 1 || cnt != 2) abort ();
> + if (f2 (2) != 0 || cnt != 3) abort ();
> + if (f2 (1) != -1UL || cnt != 3) abort ();
> + if (f3 (3) != (unsigned short) -1 || cnt != 4) abort ();
> + if (f3 (2) != 0 || cnt != 4) abort ();
> + if (f3 (1) != 1 || cnt != 4) abort ();
> + if (f4 (3) != (unsigned char) -1 || cnt != 4) abort ();
> + if (f4 (2) != 0 || cnt != 5) abort ();
> + if (f4 (1) != 1 || cnt != 6) abort ();
> + if (f5 (3) != 1 || cnt != 6) abort ();
> + if (f5 (2) != 0 || cnt != 6) abort ();
> + if (f5 (1) != -1U || cnt != 7) abort ();
> + if (f6 (3) != 1 || cnt != 8) abort ();
> + if (f6 (2) != 0 || cnt != 9) abort ();
> + if (f6 (1) != -1UL || cnt != 9) abort ();
> + if (f7 (3) != 1 || cnt != 9) abort ();
> + if (f7 (2) != 0 || cnt != 9) abort ();
> + if (f7 (1) != (unsigned short) -1 || cnt != 10) abort ();
> + if (f8 (3) != 1 || cnt != 11) abort ();
> + if (f8 (2) != 0 || cnt != 12) abort ();
> + if (f8 (1) != (unsigned char) -1 || cnt != 12) abort ();
> + return 0;
> +}
> --- gcc/testsuite/gcc.dg/pr67089-6.c.jj 2015-11-24 19:16:02.898794422
> +0100
> +++ gcc/testsuite/gcc.dg/pr67089-6.c 2015-11-24 19:32:09.928077054 +0100
> @@ -0,0 +1,62 @@
> +/* PR target/67089 */
> +/* { dg-do compile } */
> +/* { dg-options "-O2 -ftree-loop-if-convert -fdump-tree-widening_mul" } */
> +
> +extern void abort (void);
> +
> +int cnt;
> +unsigned int a[16], b[16], c[16], d;
> +void foo (int x);
> +
> +__attribute__((noinline, noclone)) void
> +f0 (unsigned int x)
> +{
> + for (int i = 0; i < 16; i++)
> + {
> + unsigned int r = x - a[i];
> + b[i] = r;
> + c[i] = r > x ? 7 : x;
> + }
> +}
> +
> +#define T(n, type, op, cond) \
> +__attribute__((noinline, noclone)) \
> +type \
> +f##n (type x, type y) \
> +{ \
> + type r = op; \
> + cond; \
> + return r; \
> +}
> +
> +T (1, unsigned int, x - y, if (r > x) foo (0))
> +T (2, unsigned long, x - y, if (r <= x) foo (0))
> +T (3, unsigned short, x - y, if (x < r) foo (r))
> +T (4, unsigned long long, x - y, if (x >= r) foo (0))
> +T (5, unsigned int, x - y, if (d || r > x) foo (0))
> +T (6, unsigned long, x - y, if (d || r <= x) foo (0))
> +T (7, unsigned char, x - y, if (d || x < r) foo (0))
> +T (8, unsigned long long, x - y, if (d || x >= r) foo (0))
> +T (9, unsigned int, x + y, if (r >= x) foo (0))
> +T (10, unsigned long, x + y, if (r < x) foo (0))
> +T (11, unsigned short, x + y, if (x <= r) foo (r))
> +T (12, unsigned long long, x + y, if (d || x > r) foo (0))
> +T (13, unsigned int, x + y, if (d || r >= x) foo (0))
> +T (14, unsigned long, x + y, if (d || r < x) foo (0))
> +T (15, unsigned short, x + y, if (d || x <= r) foo (0))
> +T (16, unsigned long long, x + y, if (d || x > r) foo (0))
> +T (17, unsigned int, x + y, if (r >= y) foo (0))
> +T (18, unsigned long, x + y, if (r < y) foo (0))
> +T (19, unsigned short, x + y, if (y <= r) foo (r))
> +T (20, unsigned long long, x + y, if (d || y > r) foo (0))
> +T (21, unsigned int, x + y, if (d || r >= y) foo (0))
> +T (22, unsigned long, x + y, if (d || r < y) foo (0))
> +T (23, unsigned short, x + y, if (d || y <= r) foo (0))
> +T (24, unsigned long long, x + y, if (d || y > r) foo (0))
> +T (25, unsigned short, 2U - x, if (r > 2U) foo (0))
> +T (26, unsigned char, 2U - x, if (r <= 2U) foo (0))
> +
> +/* { dg-final { scan-tree-dump-times "ADD_OVERFLOW" 16 "widening_mul" {
> target { { i?86-*-* x86_64-*-* } && { ! ia32 } } } } } */
> +/* { dg-final { scan-tree-dump-times "SUB_OVERFLOW" 11 "widening_mul" {
> target { { i?86-*-* x86_64-*-* } && { ! ia32 } } } } } */
> +/* { dg-final { scan-tree-dump-times "ADD_OVERFLOW" 12 "widening_mul" {
> target { { i?86-*-* x86_64-*-* } && ia32 } } } } */
> +/* { dg-final { scan-tree-dump-times "SUB_OVERFLOW" 9 "widening_mul" {
> target { { i?86-*-* x86_64-*-* } && ia32 } } } } */
> --- gcc/testsuite/gcc.dg/pr67089-7.c.jj 2015-11-24 19:32:30.332788737
> +0100
> +++ gcc/testsuite/gcc.dg/pr67089-7.c 2015-11-24 19:37:12.304804499 +0100
> @@ -0,0 +1,62 @@
> +/* PR target/67089 */
> +/* { dg-do compile } */
> +/* { dg-options "-O2 -ftree-loop-if-convert -fdump-tree-widening_mul" } */
> +
> +extern void abort (void);
> +
> +int cnt, d;
> +void foo (int x);
> +
> +#define T(n, type, op, cond) \
> +__attribute__((noinline, noclone)) \
> +type \
> +f##n (type x, type y) \
> +{ \
> + type r = op; \
> + cond; \
> + return r; \
> +}
> +
> +T (1, unsigned int, x - y, if (r >= x) foo (0))
> +T (2, unsigned long, x - y, if (r < x) foo (0))
> +T (3, unsigned short, x - y, if (x <= r) foo (r))
> +T (4, unsigned long long, x - y, if (d || x > r) foo (0))
> +T (5, unsigned int, x - y, if (d || r >= x) foo (0))
> +T (6, unsigned long, x - y, if (d || r < x) foo (0))
> +T (7, unsigned short, x - y, if (d || x <= r) foo (0))
> +T (8, unsigned long long, x - y, if (d || x > r) foo (0))
> +T (9, unsigned int, x - y, if (r > y) foo (0))
> +T (10, unsigned long, x - y, if (r <= y) foo (0))
> +T (11, unsigned short, x - y, if (y < r) foo (r))
> +T (12, unsigned long long, x - y, if (y >= r) foo (0))
> +T (13, unsigned int, x - y, if (r >= y) foo (0))
> +T (14, unsigned long, x - y, if (r < y) foo (0))
> +T (15, unsigned short, x - y, if (y <= r) foo (r))
> +T (16, unsigned long long, x - y, if (d || y > r) foo (0))
> +T (17, unsigned int, x - y, if (d || r > y) foo (0))
> +T (18, unsigned long, x - y, if (d || r <= y) foo (0))
> +T (19, unsigned char, x - y, if (d || y < r) foo (0))
> +T (20, unsigned long long, x - y, if (d || y >= r) foo (0))
> +T (21, unsigned int, x - y, if (d || r >= y) foo (0))
> +T (22, unsigned long, x - y, if (d || r < y) foo (0))
> +T (23, unsigned short, x - y, if (d || y <= r) foo (0))
> +T (24, unsigned long long, x - y, if (d || y > r) foo (0))
> +T (25, unsigned int, x + y, if (r > x) foo (0))
> +T (26, unsigned long, x + y, if (r <= x) foo (0))
> +T (27, unsigned short, x + y, if (x < r) foo (r))
> +T (28, unsigned long long, x + y, if (x >= r) foo (0))
> +T (29, unsigned int, x + y, if (d || r > x) foo (0))
> +T (30, unsigned long, x + y, if (d || r <= x) foo (0))
> +T (31, unsigned char, x + y, if (d || x < r) foo (0))
> +T (32, unsigned long long, x + y, if (d || x >= r) foo (0))
> +T (33, unsigned int, x + y, if (r > y) foo (0))
> +T (34, unsigned long, x + y, if (r <= y) foo (0))
> +T (35, unsigned short, x + y, if (y < r) foo (r))
> +T (36, unsigned long long, x + y, if (y >= r) foo (0))
> +T (37, unsigned int, x + y, if (d || r > y) foo (0))
> +T (38, unsigned long, x + y, if (d || r <= y) foo (0))
> +T (39, unsigned char, x + y, if (d || y < r) foo (0))
> +T (40, unsigned long long, x + y, if (d || y >= r) foo (0))
> +
> +/* { dg-final { scan-tree-dump-not "ADD_OVERFLOW" "widening_mul" } } */
> +/* { dg-final { scan-tree-dump-not "SUB_OVERFLOW" "widening_mul" } } */
>
> Jakub
>
>
--
Richard Biener <rguent...@suse.de>
SUSE LINUX GmbH, GF: Felix Imendoerffer, Jane Smithard, Graham Norton, HRB
21284 (AG Nuernberg)
