diff options
Diffstat (limited to 'gcc/cfgexpand.c')
| -rw-r--r-- | gcc/cfgexpand.c | 648 |
1 files changed, 648 insertions, 0 deletions
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index e550a4c8b7e..807ece0881a 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -1465,6 +1465,624 @@ expand_gimple_tailcall (basic_block bb, tree stmt, bool *can_fallthru) return bb; } +/* Return the difference between the floor and the truncated result of + a signed division by OP1 with remainder MOD. */ +static rtx +floor_sdiv_adjust (enum machine_mode mode, rtx mod, rtx op1) +{ + /* (mod != 0 ? (op1 / mod < 0 ? -1 : 0) : 0) */ + return gen_rtx_IF_THEN_ELSE + (mode, gen_rtx_NE (BImode, mod, const0_rtx), + gen_rtx_IF_THEN_ELSE + (mode, gen_rtx_LT (BImode, + gen_rtx_DIV (mode, op1, mod), + const0_rtx), + constm1_rtx, const0_rtx), + const0_rtx); +} + +/* Return the difference between the ceil and the truncated result of + a signed division by OP1 with remainder MOD. */ +static rtx +ceil_sdiv_adjust (enum machine_mode mode, rtx mod, rtx op1) +{ + /* (mod != 0 ? (op1 / mod > 0 ? 1 : 0) : 0) */ + return gen_rtx_IF_THEN_ELSE + (mode, gen_rtx_NE (BImode, mod, const0_rtx), + gen_rtx_IF_THEN_ELSE + (mode, gen_rtx_GT (BImode, + gen_rtx_DIV (mode, op1, mod), + const0_rtx), + const1_rtx, const0_rtx), + const0_rtx); +} + +/* Return the difference between the ceil and the truncated result of + an unsigned division by OP1 with remainder MOD. */ +static rtx +ceil_udiv_adjust (enum machine_mode mode, rtx mod, rtx op1 ATTRIBUTE_UNUSED) +{ + /* (mod != 0 ? 1 : 0) */ + return gen_rtx_IF_THEN_ELSE + (mode, gen_rtx_NE (BImode, mod, const0_rtx), + const1_rtx, const0_rtx); +} + +/* Return the difference between the rounded and the truncated result + of a signed division by OP1 with remainder MOD. Halfway cases are + rounded away from zero, rather than to the nearest even number. */ +static rtx +round_sdiv_adjust (enum machine_mode mode, rtx mod, rtx op1) +{ + /* (abs (mod) >= abs (op1) - abs (mod) + ? (op1 / mod > 0 ? 1 : -1) + : 0) */ + return gen_rtx_IF_THEN_ELSE + (mode, gen_rtx_GE (BImode, gen_rtx_ABS (mode, mod), + gen_rtx_MINUS (mode, + gen_rtx_ABS (mode, op1), + gen_rtx_ABS (mode, mod))), + gen_rtx_IF_THEN_ELSE + (mode, gen_rtx_GT (BImode, + gen_rtx_DIV (mode, op1, mod), + const0_rtx), + const1_rtx, constm1_rtx), + const0_rtx); +} + +/* Return the difference between the rounded and the truncated result + of a unsigned division by OP1 with remainder MOD. Halfway cases + are rounded away from zero, rather than to the nearest even + number. */ +static rtx +round_udiv_adjust (enum machine_mode mode, rtx mod, rtx op1) +{ + /* (mod >= op1 - mod ? 1 : 0) */ + return gen_rtx_IF_THEN_ELSE + (mode, gen_rtx_GE (BImode, mod, + gen_rtx_MINUS (mode, op1, mod)), + const1_rtx, const0_rtx); +} + + +/* Return an RTX equivalent to the value of the tree expression + EXP. */ + +static rtx +expand_debug_expr (tree exp) +{ + rtx op0 = NULL_RTX, op1 = NULL_RTX, op2 = NULL_RTX; + enum machine_mode mode = TYPE_MODE (TREE_TYPE (exp)); + int unsignedp = TYPE_UNSIGNED (TREE_TYPE (exp)); + + switch (TREE_CODE_CLASS (TREE_CODE (exp))) + { + case tcc_expression: + switch (TREE_CODE (exp)) + { + case COND_EXPR: + goto ternary; + + case TRUTH_ANDIF_EXPR: + case TRUTH_ORIF_EXPR: + case TRUTH_AND_EXPR: + case TRUTH_OR_EXPR: + case TRUTH_XOR_EXPR: + goto binary; + + case TRUTH_NOT_EXPR: + goto unary; + + default: + break; + } + break; + + ternary: + op2 = expand_debug_expr (TREE_OPERAND (exp, 2)); + if (!op2) + return NULL_RTX; + /* Fall through. */ + + binary: + case tcc_binary: + case tcc_comparison: + op1 = expand_debug_expr (TREE_OPERAND (exp, 1)); + if (!op1) + return NULL_RTX; + /* Fall through. */ + + unary: + case tcc_unary: + op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); + if (!op0) + return NULL_RTX; + break; + + case tcc_type: + case tcc_statement: + case tcc_gimple_stmt: + gcc_unreachable (); + + case tcc_constant: + case tcc_exceptional: + case tcc_declaration: + case tcc_reference: + case tcc_vl_exp: + break; + } + + switch (TREE_CODE (exp)) + { + case VAR_DECL: + case PARM_DECL: + case FUNCTION_DECL: + case LABEL_DECL: + case CONST_DECL: + case RESULT_DECL: + /* This decl was optimized away. */ + if (!DECL_RTL_SET_P (exp)) + return NULL; + + return DECL_RTL (exp); + + case INTEGER_CST: + case REAL_CST: + case FIXED_CST: + case COMPLEX_CST: + case STRING_CST: + op0 = expand_expr (exp, NULL_RTX, mode, + EXPAND_INITIALIZER | EXPAND_CONST_ADDRESS); + if (op0 && GET_MODE (op0) == VOIDmode && mode != VOIDmode) + return op0 = gen_rtx_CONST (mode, op0); + return op0; + + case NOP_EXPR: + case CONVERT_EXPR: + { + enum machine_mode inner_mode + = TYPE_MODE (TREE_TYPE (TREE_OPERAND (exp, 0))); + + if (mode == GET_MODE (op0)) + return op0; + + if (CONSTANT_P (op0) + || GET_MODE_BITSIZE (mode) <= GET_MODE_BITSIZE (GET_MODE (op0))) + op0 = simplify_gen_subreg (mode, op0, inner_mode, + subreg_lowpart_offset (mode, + inner_mode)); + else if (unsignedp) + op0 = gen_rtx_ZERO_EXTEND (mode, op0); + else + op0 = gen_rtx_SIGN_EXTEND (mode, op0); + + return op0; + } + + case INDIRECT_REF: + case ALIGN_INDIRECT_REF: + case MISALIGNED_INDIRECT_REF: + op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); + if (!op0) + return NULL; + + gcc_assert (GET_MODE (op0) == Pmode); + + if (TREE_CODE (exp) == ALIGN_INDIRECT_REF) + { + int align = TYPE_ALIGN_UNIT (TREE_TYPE (exp)); + op0 = gen_rtx_AND (Pmode, op0, GEN_INT (-align)); + } + + op0 = gen_rtx_MEM (mode, op0); + + set_mem_attributes (op0, exp, 0); + + return op0; + + case TARGET_MEM_REF: + if (TMR_SYMBOL (exp) && !DECL_RTL_SET_P (TMR_SYMBOL (exp))) + return NULL; + + op0 = expand_debug_expr + (tree_mem_ref_addr (build_pointer_type (TREE_TYPE (exp)), + exp)); + if (!op0) + return NULL; + + gcc_assert (GET_MODE (op0) == Pmode); + + op0 = gen_rtx_MEM (mode, op0); + + set_mem_attributes (op0, exp, 0); + + return op0; + + case ARRAY_REF: + case ARRAY_RANGE_REF: + case COMPONENT_REF: + case BIT_FIELD_REF: + case REALPART_EXPR: + case IMAGPART_EXPR: + case VIEW_CONVERT_EXPR: + { + enum machine_mode mode1; + HOST_WIDE_INT bitsize, bitpos; + tree offset; + int volatilep = 0; + tree tem = get_inner_reference (exp, &bitsize, &bitpos, &offset, + &mode1, &unsignedp, &volatilep, true); + + op0 = expand_debug_expr (tem); + + if (!op0) + return NULL; + + if (offset) + { + gcc_assert (MEM_P (op0)); + + op1 = expand_debug_expr (offset); + if (!op1) + return NULL; + + op0 = gen_rtx_MEM (mode, gen_rtx_PLUS (Pmode, XEXP (op0, 0), op1)); + } + + if (MEM_P (op0)) + { + if (bitpos >= BITS_PER_UNIT) + { + op0 = adjust_address_nv (op0, mode1, bitpos / BITS_PER_UNIT); + bitpos %= BITS_PER_UNIT; + } + else if (bitpos == 0 && bitsize == GET_MODE_BITSIZE (mode)) + op0 = adjust_address_nv (op0, mode, 0); + else if (GET_MODE (op0) != mode1) + op0 = adjust_address_nv (op0, mode1, 0); + else + op0 = copy_rtx (op0); + set_mem_attributes (op0, exp, 0); + } + + if (bitpos == 0 && mode == GET_MODE (op0)) + return op0; + + if ((bitpos % BITS_PER_UNIT) == 0 + && bitsize == GET_MODE_BITSIZE (mode1)) + return simplify_gen_subreg (mode, op0, + GET_MODE (op0) != VOIDmode + ? GET_MODE (op0) : mode1, + bitpos / BITS_PER_UNIT); + + return simplify_gen_ternary (SCALAR_INT_MODE_P (GET_MODE (op0)) + && TYPE_UNSIGNED (TREE_TYPE (exp)) + ? SIGN_EXTRACT + : ZERO_EXTRACT, mode, + GET_MODE (op0) != VOIDmode + ? GET_MODE (op0) : mode1, + op0, GEN_INT (bitsize), GEN_INT (bitpos)); + } + + case EXC_PTR_EXPR: + /* ??? Do not call get_exception_pointer(), we don't want to gen + it if it hasn't been created yet. */ + return get_exception_pointer (cfun); + + case FILTER_EXPR: + /* Likewise get_exception_filter(). */ + return get_exception_filter (cfun); + + case ABS_EXPR: + return gen_rtx_ABS (mode, op0); + + case NEGATE_EXPR: + return gen_rtx_NEG (mode, op0); + + case BIT_NOT_EXPR: + return gen_rtx_NOT (mode, op0); + + case FLOAT_EXPR: + if (unsignedp) + return gen_rtx_UNSIGNED_FLOAT (mode, op0); + else + return gen_rtx_FLOAT (mode, op0); + + case FIX_TRUNC_EXPR: + if (unsignedp) + return gen_rtx_UNSIGNED_FIX (mode, op0); + else + return gen_rtx_FIX (mode, op0); + + case POINTER_PLUS_EXPR: + case PLUS_EXPR: + return gen_rtx_PLUS (mode, op0, op1); + + case MINUS_EXPR: + return gen_rtx_MINUS (mode, op0, op1); + + case MULT_EXPR: + return gen_rtx_MULT (mode, op0, op1); + + case RDIV_EXPR: + case TRUNC_DIV_EXPR: + case EXACT_DIV_EXPR: + if (unsignedp) + return gen_rtx_UDIV (mode, op0, op1); + else + return gen_rtx_DIV (mode, op0, op1); + + case TRUNC_MOD_EXPR: + if (unsignedp) + return gen_rtx_UMOD (mode, op0, op1); + else + return gen_rtx_MOD (mode, op0, op1); + + case FLOOR_DIV_EXPR: + if (unsignedp) + return gen_rtx_UDIV (mode, op0, op1); + else + { + rtx div = gen_rtx_DIV (mode, op0, op1); + rtx mod = gen_rtx_MOD (mode, op0, op1); + rtx adj = floor_sdiv_adjust (mode, mod, op1); + return gen_rtx_PLUS (mode, div, adj); + } + + case FLOOR_MOD_EXPR: + if (unsignedp) + return gen_rtx_UMOD (mode, op0, op1); + else + { + rtx mod = gen_rtx_MOD (mode, op0, op1); + rtx adj = floor_sdiv_adjust (mode, mod, op1); + adj = gen_rtx_NEG (mode, gen_rtx_MULT (mode, adj, op1)); + return gen_rtx_PLUS (mode, mod, adj); + } + + case CEIL_DIV_EXPR: + if (unsignedp) + { + rtx div = gen_rtx_UDIV (mode, op0, op1); + rtx mod = gen_rtx_UMOD (mode, op0, op1); + rtx adj = ceil_udiv_adjust (mode, mod, op1); + return gen_rtx_PLUS (mode, div, adj); + } + else + { + rtx div = gen_rtx_DIV (mode, op0, op1); + rtx mod = gen_rtx_MOD (mode, op0, op1); + rtx adj = ceil_sdiv_adjust (mode, mod, op1); + return gen_rtx_PLUS (mode, div, adj); + } + + case CEIL_MOD_EXPR: + if (unsignedp) + { + rtx mod = gen_rtx_UMOD (mode, op0, op1); + rtx adj = ceil_udiv_adjust (mode, mod, op1); + adj = gen_rtx_NEG (mode, gen_rtx_MULT (mode, adj, op1)); + return gen_rtx_PLUS (mode, mod, adj); + } + else + { + rtx mod = gen_rtx_MOD (mode, op0, op1); + rtx adj = ceil_sdiv_adjust (mode, mod, op1); + adj = gen_rtx_NEG (mode, gen_rtx_MULT (mode, adj, op1)); + return gen_rtx_PLUS (mode, mod, adj); + } + + case ROUND_DIV_EXPR: + if (unsignedp) + { + rtx div = gen_rtx_UDIV (mode, op0, op1); + rtx mod = gen_rtx_UMOD (mode, op0, op1); + rtx adj = round_udiv_adjust (mode, mod, op1); + return gen_rtx_PLUS (mode, div, adj); + } + else + { + rtx div = gen_rtx_DIV (mode, op0, op1); + rtx mod = gen_rtx_MOD (mode, op0, op1); + rtx adj = round_sdiv_adjust (mode, mod, op1); + return gen_rtx_PLUS (mode, div, adj); + } + + case ROUND_MOD_EXPR: + if (unsignedp) + { + rtx mod = gen_rtx_UMOD (mode, op0, op1); + rtx adj = round_udiv_adjust (mode, mod, op1); + adj = gen_rtx_NEG (mode, gen_rtx_MULT (mode, adj, op1)); + return gen_rtx_PLUS (mode, mod, adj); + } + else + { + rtx mod = gen_rtx_MOD (mode, op0, op1); + rtx adj = round_sdiv_adjust (mode, mod, op1); + adj = gen_rtx_NEG (mode, gen_rtx_MULT (mode, adj, op1)); + return gen_rtx_PLUS (mode, mod, adj); + } + + case LSHIFT_EXPR: + return gen_rtx_ASHIFT (mode, op0, op1); + + case RSHIFT_EXPR: + if (unsignedp) + return gen_rtx_LSHIFTRT (mode, op0, op1); + else + return gen_rtx_ASHIFTRT (mode, op0, op1); + + case LROTATE_EXPR: + return gen_rtx_ROTATE (mode, op0, op1); + + case RROTATE_EXPR: + return gen_rtx_ROTATERT (mode, op0, op1); + + case MIN_EXPR: + if (unsignedp) + return gen_rtx_UMIN (mode, op0, op1); + else + return gen_rtx_SMIN (mode, op0, op1); + + case MAX_EXPR: + if (unsignedp) + return gen_rtx_UMAX (mode, op0, op1); + else + return gen_rtx_SMAX (mode, op0, op1); + + case BIT_AND_EXPR: + case TRUTH_AND_EXPR: + return gen_rtx_AND (mode, op0, op1); + + case BIT_IOR_EXPR: + case TRUTH_OR_EXPR: + return gen_rtx_IOR (mode, op0, op1); + + case BIT_XOR_EXPR: + case TRUTH_XOR_EXPR: + return gen_rtx_XOR (mode, op0, op1); + + case TRUTH_ANDIF_EXPR: + return gen_rtx_IF_THEN_ELSE (mode, op0, op1, const0_rtx); + + case TRUTH_ORIF_EXPR: + return gen_rtx_IF_THEN_ELSE (mode, op0, const_true_rtx, op1); + + case TRUTH_NOT_EXPR: + return gen_rtx_EQ (mode, op0, const0_rtx); + + case LT_EXPR: + if (unsignedp) + return gen_rtx_LTU (mode, op0, op1); + else + return gen_rtx_LT (mode, op0, op1); + + case LE_EXPR: + if (unsignedp) + return gen_rtx_LEU (mode, op0, op1); + else + return gen_rtx_LE (mode, op0, op1); + + case GT_EXPR: + if (unsignedp) + return gen_rtx_GTU (mode, op0, op1); + else + return gen_rtx_GT (mode, op0, op1); + + case GE_EXPR: + if (unsignedp) + return gen_rtx_GEU (mode, op0, op1); + else + return gen_rtx_GE (mode, op0, op1); + + case EQ_EXPR: + return gen_rtx_EQ (mode, op0, op1); + + case NE_EXPR: + return gen_rtx_NE (mode, op0, op1); + + case UNORDERED_EXPR: + return gen_rtx_UNORDERED (mode, op0, op1); + + case ORDERED_EXPR: + return gen_rtx_ORDERED (mode, op0, op1); + + case UNLT_EXPR: + return gen_rtx_UNLT (mode, op0, op1); + + case UNLE_EXPR: + return gen_rtx_UNLE (mode, op0, op1); + + case UNGT_EXPR: + return gen_rtx_UNGT (mode, op0, op1); + + case UNGE_EXPR: + return gen_rtx_UNGE (mode, op0, op1); + + case UNEQ_EXPR: + return gen_rtx_UNEQ (mode, op0, op1); + + case LTGT_EXPR: + return gen_rtx_LTGT (mode, op0, op1); + + case COND_EXPR: + return gen_rtx_IF_THEN_ELSE (mode, op0, op1, op2); + + case COMPLEX_EXPR: + gcc_assert (COMPLEX_MODE_P (mode)); + if (GET_MODE (op0) == VOIDmode) + op0 = gen_rtx_CONST (GET_MODE_INNER (mode), op0); + if (GET_MODE (op1) == VOIDmode) + op1 = gen_rtx_CONST (GET_MODE_INNER (mode), op1); + return gen_rtx_CONCAT (mode, op0, op1); + + case ADDR_EXPR: + op0 = expand_debug_expr (TREE_OPERAND (exp, 0)); + if (!op0 || !MEM_P (op0)) + return NULL; + + return XEXP (op0, 0); + + case VECTOR_CST: + exp = build_constructor_from_list (TREE_TYPE (exp), + TREE_VECTOR_CST_ELTS (exp)); + /* Fall through. */ + + case CONSTRUCTOR: + if (TREE_CODE (TREE_TYPE (exp)) == VECTOR_TYPE) + { + unsigned i; + tree val; + + op0 = gen_rtx_CONCATN + (mode, rtvec_alloc (TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp)))); + + FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (exp), i, val) + { + op1 = expand_debug_expr (val); + if (!op1) + return NULL; + XVECEXP (op0, 0, i) = op1; + } + + if (i < TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp))) + { + op1 = expand_debug_expr + (fold_convert (TREE_TYPE (TREE_TYPE (exp)), integer_zero_node)); + + if (!op1) + return NULL; + + for (; i < TYPE_VECTOR_SUBPARTS (TREE_TYPE (exp)); i++) + XVECEXP (op0, 0, i) = op1; + } + + return op0; + } + else + goto flag_unsupported; + + case CALL_EXPR: + /* ??? Maybe handle some builtins? */ + return NULL; + + /* SSA names of optimized-away variables can survive un-SSA. */ + case SSA_NAME: + case ERROR_MARK: + return NULL; + + + default: + flag_unsupported: +#if 0 + return NULL; +#endif + debug_tree (exp); + gcc_unreachable (); + } +} + /* Expand basic block BB from GIMPLE trees to RTL. */ static basic_block @@ -1575,6 +2193,36 @@ expand_gimple_basic_block (basic_block bb) if (new_bb) return new_bb; } + else if (TREE_CODE (stmt) == VAR_DEBUG_VALUE) + { + tree var = VAR_DEBUG_VALUE_VAR (stmt); + tree value = VAR_DEBUG_VALUE_VALUE (stmt); + rtx val; + + last = get_last_insn (); + + if (value == VAR_DEBUG_VALUE_NOVALUE) + val = NULL_RTX; + else + val = expand_debug_expr (value); + + if (!val) + val = gen_rtx_UNKNOWN_VAR_LOC (VOIDmode); + + val = gen_rtx_VAR_LOCATION + (VOIDmode, var, val, VAR_INIT_STATUS_INITIALIZED); + + val = emit_debug_insn (val); + + maybe_dump_rtl_for_tree_stmt (stmt, last); + + if (last != PREV_INSN (val)) + { + debug_generic_expr (stmt); + debug_rtx_range (NEXT_INSN (last), get_last_insn ()); + gcc_unreachable (); + } + } else { tree call = get_call_expr_in (stmt); |