Submitter | Kenneth Zadeck |
---|---|

Date | Oct. 31, 2012, 6:19 p.m. |

Message ID | <50916BB1.1050507@naturalbridge.com> |

Download | mbox | patch |

Permalink | /patch/195984/ |

State | New |

Headers | show |

## Comments

## Patch

@@ -1373,302 +1411,87 @@ simplify_const_unary_operation (enum rtx_code code, enum machine_mode mode, return CONST_DOUBLE_FROM_REAL_VALUE (d, mode); } - if (CONST_INT_P (op) - && width <= HOST_BITS_PER_WIDE_INT && width > 0) + if (CONST_SCALAR_INT_P (op) && width > 0) { - HOST_WIDE_INT arg0 = INTVAL (op); - HOST_WIDE_INT val; + wide_int result; + enum machine_mode imode = op_mode == VOIDmode ? mode : op_mode; + wide_int op0 = wide_int::from_rtx (op, imode); + +#if TARGET_SUPPORTS_WIDE_INT == 0 + /* This assert keeps the simplification from producing a result + that cannot be represented in a CONST_DOUBLE but a lot of + upstream callers expect that this function never fails to + simplify something and so you if you added this to the test + above the code would die later anyway. If this assert + happens, you just need to make the port support wide int. */ + gcc_assert (width <= HOST_BITS_PER_DOUBLE_INT); +#endif switch (code) { case NOT: - val = ~ arg0; + result = ~op0; break; case NEG: - val = - arg0; + result = op0.neg (); break; case ABS: - val = (arg0 >= 0 ? arg0 : - arg0); + result = op0.abs (); break; case FFS: - arg0 &= GET_MODE_MASK (mode); - val = ffs_hwi (arg0); + result = op0.ffs (); break; case CLZ: - arg0 &= GET_MODE_MASK (mode); - if (arg0 == 0 && CLZ_DEFINED_VALUE_AT_ZERO (mode, val)) - ; - else - val = GET_MODE_PRECISION (mode) - floor_log2 (arg0) - 1; + result = op0.clz (GET_MODE_BITSIZE (mode), + GET_MODE_PRECISION (mode)); break; case CLRSB: - arg0 &= GET_MODE_MASK (mode); - if (arg0 == 0) - val = GET_MODE_PRECISION (mode) - 1; - else if (arg0 >= 0) - val = GET_MODE_PRECISION (mode) - floor_log2 (arg0) - 2; - else if (arg0 < 0) - val = GET_MODE_PRECISION (mode) - floor_log2 (~arg0) - 2; + result = op0.clrsb (GET_MODE_BITSIZE (mode), + GET_MODE_PRECISION (mode)); break; - + case CTZ: - arg0 &= GET_MODE_MASK (mode); - if (arg0 == 0) - { - /* Even if the value at zero is undefined, we have to come - up with some replacement. Seems good enough. */ - if (! CTZ_DEFINED_VALUE_AT_ZERO (mode, val)) - val = GET_MODE_PRECISION (mode); - } - else - val = ctz_hwi (arg0); + result = op0.ctz (GET_MODE_BITSIZE (mode), + GET_MODE_PRECISION (mode)); break; case POPCOUNT: - arg0 &= GET_MODE_MASK (mode); - val = 0; - while (arg0) - val++, arg0 &= arg0 - 1; + result = op0.popcount (GET_MODE_BITSIZE (mode), + GET_MODE_PRECISION (mode)); break; case PARITY: - arg0 &= GET_MODE_MASK (mode); - val = 0; - while (arg0) - val++, arg0 &= arg0 - 1; - val &= 1; + result = op0.parity (GET_MODE_BITSIZE (mode), + GET_MODE_PRECISION (mode)); break; case BSWAP: - { - unsigned int s; - - val = 0; - for (s = 0; s < width; s += 8) - { - unsigned int d = width - s - 8; - unsigned HOST_WIDE_INT byte; - byte = (arg0 >> s) & 0xff; - val |= byte << d; - } - } + result = op0.bswap (); break; case TRUNCATE: - val = arg0; + result = op0.sext (mode); break; case ZERO_EXTEND: - /* When zero-extending a CONST_INT, we need to know its - original mode. */ - gcc_assert (op_mode != VOIDmode); - if (op_width == HOST_BITS_PER_WIDE_INT) - { - /* If we were really extending the mode, - we would have to distinguish between zero-extension - and sign-extension. */ - gcc_assert (width == op_width); - val = arg0; - } - else if (GET_MODE_BITSIZE (op_mode) < HOST_BITS_PER_WIDE_INT) - val = arg0 & GET_MODE_MASK (op_mode); - else - return 0; + result = op0.zext (mode); break; case SIGN_EXTEND: - if (op_mode == VOIDmode) - op_mode = mode; - op_width = GET_MODE_PRECISION (op_mode); - if (op_width == HOST_BITS_PER_WIDE_INT) - { - /* If we were really extending the mode, - we would have to distinguish between zero-extension - and sign-extension. */ - gcc_assert (width == op_width); - val = arg0; - } - else if (op_width < HOST_BITS_PER_WIDE_INT) - { - val = arg0 & GET_MODE_MASK (op_mode); - if (val_signbit_known_set_p (op_mode, val)) - val |= ~GET_MODE_MASK (op_mode); - } - else - return 0; + result = op0.sext (mode); break; case SQRT: - case FLOAT_EXTEND: - case FLOAT_TRUNCATE: - case SS_TRUNCATE: - case US_TRUNCATE: - case SS_NEG: - case US_NEG: - case SS_ABS: - return 0; - - default: - gcc_unreachable (); - } - - return gen_int_mode (val, mode); - } - - /* We can do some operations on integer CONST_DOUBLEs. Also allow - for a DImode operation on a CONST_INT. */ - else if (width <= HOST_BITS_PER_DOUBLE_INT - && (CONST_DOUBLE_AS_INT_P (op) || CONST_INT_P (op))) - { - double_int first, value; - - if (CONST_DOUBLE_AS_INT_P (op)) - first = double_int::from_pair (CONST_DOUBLE_HIGH (op), - CONST_DOUBLE_LOW (op)); - else - first = double_int::from_shwi (INTVAL (op)); - - switch (code) - { - case NOT: - value = ~first; - break; - - case NEG: - value = -first; - break; - - case ABS: - if (first.is_negative ()) - value = -first; - else - value = first; - break; - - case FFS: - value.high = 0; - if (first.low != 0) - value.low = ffs_hwi (first.low); - else if (first.high != 0) - value.low = HOST_BITS_PER_WIDE_INT + ffs_hwi (first.high); - else - value.low = 0; - break; - - case CLZ: - value.high = 0; - if (first.high != 0) - value.low = GET_MODE_PRECISION (mode) - floor_log2 (first.high) - 1 - - HOST_BITS_PER_WIDE_INT; - else if (first.low != 0) - value.low = GET_MODE_PRECISION (mode) - floor_log2 (first.low) - 1; - else if (! CLZ_DEFINED_VALUE_AT_ZERO (mode, value.low)) - value.low = GET_MODE_PRECISION (mode); - break; - - case CTZ: - value.high = 0; - if (first.low != 0) - value.low = ctz_hwi (first.low); - else if (first.high != 0) - value.low = HOST_BITS_PER_WIDE_INT + ctz_hwi (first.high); - else if (! CTZ_DEFINED_VALUE_AT_ZERO (mode, value.low)) - value.low = GET_MODE_PRECISION (mode); - break; - - case POPCOUNT: - value = double_int_zero; - while (first.low) - { - value.low++; - first.low &= first.low - 1; - } - while (first.high) - { - value.low++; - first.high &= first.high - 1; - } - break; - - case PARITY: - value = double_int_zero; - while (first.low) - { - value.low++; - first.low &= first.low - 1; - } - while (first.high) - { - value.low++; - first.high &= first.high - 1; - } - value.low &= 1; - break; - - case BSWAP: - { - unsigned int s; - - value = double_int_zero; - for (s = 0; s < width; s += 8) - { - unsigned int d = width - s - 8; - unsigned HOST_WIDE_INT byte; - - if (s < HOST_BITS_PER_WIDE_INT) - byte = (first.low >> s) & 0xff; - else - byte = (first.high >> (s - HOST_BITS_PER_WIDE_INT)) & 0xff; - - if (d < HOST_BITS_PER_WIDE_INT) - value.low |= byte << d; - else - value.high |= byte << (d - HOST_BITS_PER_WIDE_INT); - } - } - break; - - case TRUNCATE: - /* This is just a change-of-mode, so do nothing. */ - value = first; - break; - - case ZERO_EXTEND: - gcc_assert (op_mode != VOIDmode); - - if (op_width > HOST_BITS_PER_WIDE_INT) - return 0; - - value = double_int::from_uhwi (first.low & GET_MODE_MASK (op_mode)); - break; - - case SIGN_EXTEND: - if (op_mode == VOIDmode - || op_width > HOST_BITS_PER_WIDE_INT) - return 0; - else - { - value.low = first.low & GET_MODE_MASK (op_mode); - if (val_signbit_known_set_p (op_mode, value.low)) - value.low |= ~GET_MODE_MASK (op_mode); - - value.high = HWI_SIGN_EXTEND (value.low); - } - break; - - case SQRT: - return 0; - default: return 0; } - return immed_double_int_const (value, mode); + return immed_wide_int_const (result, mode); }