diff options
Diffstat (limited to 'gcc/tree-scalar-evolution.c')
| -rw-r--r-- | gcc/tree-scalar-evolution.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/tree-scalar-evolution.c b/gcc/tree-scalar-evolution.c index f306ab8277c..ba15d52c68d 100644 --- a/gcc/tree-scalar-evolution.c +++ b/gcc/tree-scalar-evolution.c @@ -1712,6 +1712,15 @@ interpret_rhs_expr (struct loop *loop, gimple at_stmt, fold_convert (type, integer_minus_one_node)); break; + case BIT_NOT_EXPR: + /* Handle ~X as -1 - X. */ + chrec1 = analyze_scalar_evolution (loop, rhs1); + chrec1 = chrec_convert (type, chrec1, at_stmt); + res = chrec_fold_minus (type, + fold_convert (type, integer_minus_one_node), + chrec1); + break; + case MULT_EXPR: chrec1 = analyze_scalar_evolution (loop, rhs1); chrec2 = analyze_scalar_evolution (loop, rhs2); @@ -2215,6 +2224,24 @@ instantiate_scev_1 (basic_block instantiate_below, return chrec_convert (TREE_TYPE (chrec), op0, NULL); + case BIT_NOT_EXPR: + /* Handle ~X as -1 - X. */ + op0 = instantiate_scev_1 (instantiate_below, evolution_loop, + TREE_OPERAND (chrec, 0), + fold_conversions, cache, size_expr); + if (op0 == chrec_dont_know) + return chrec_dont_know; + + if (TREE_OPERAND (chrec, 0) != op0) + { + op0 = chrec_convert (type, op0, NULL); + chrec = chrec_fold_minus (type, + fold_convert (type, + integer_minus_one_node), + op0); + } + return chrec; + case SCEV_NOT_KNOWN: return chrec_dont_know; |