diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 33 |
1 files changed, 19 insertions, 14 deletions
@@ -2163,19 +2163,20 @@ copy_blkmode_from_reg (tgtblk, srcreg, type) preserve_temp_slots (tgtblk); } - /* This code assumes srcreg is at least a full word. If it isn't, - copy it into a new pseudo which is a full word. */ + /* This code assumes srcreg is at least a full word. If it isn't, copy it + into a new pseudo which is a full word. - /* If FUNCTION_ARG_REG_LITTLE_ENDIAN is set and convert_to_mode does - a copy, the wrong part of the register gets copied so we fake - a type conversion in place. */ - + If FUNCTION_ARG_REG_LITTLE_ENDIAN is set and convert_to_mode does a copy, + the wrong part of the register gets copied so we fake a type conversion + in place. */ if (GET_MODE (srcreg) != BLKmode && GET_MODE_SIZE (GET_MODE (srcreg)) < UNITS_PER_WORD) - if (FUNCTION_ARG_REG_LITTLE_ENDIAN) - srcreg = simplify_gen_subreg (word_mode, srcreg, GET_MODE (srcreg), 0); - else - srcreg = convert_to_mode (word_mode, srcreg, TREE_UNSIGNED (type)); + { + if (FUNCTION_ARG_REG_LITTLE_ENDIAN) + srcreg = simplify_gen_subreg (word_mode, srcreg, GET_MODE (srcreg), 0); + else + srcreg = convert_to_mode (word_mode, srcreg, TREE_UNSIGNED (type)); + } /* Structures whose size is not a multiple of a word are aligned to the least significant byte (to the right). On a BYTES_BIG_ENDIAN @@ -3645,8 +3646,8 @@ expand_assignment (to, from, want_value, suggest_reg) if (mode1 == VOIDmode && want_value) tem = stabilize_reference (tem); - orig_to_rtx = to_rtx = expand_expr (tem, NULL_RTX, VOIDmode, - EXPAND_WRITE); + orig_to_rtx = to_rtx = expand_expr (tem, NULL_RTX, VOIDmode, 0); + if (offset != 0) { rtx offset_rtx = expand_expr (offset, NULL_RTX, VOIDmode, 0); @@ -5794,8 +5795,12 @@ highest_pow2_factor (exp) /* If the integer is expressable in a HOST_WIDE_INT, we can find the lowest bit that's a one. If the result is zero, pessimize by returning 1. This is overly-conservative, but such things should not - happen in the offset expressions that we are called with. */ - if (host_integerp (exp, 0)) + happen in the offset expressions that we are called with. If + the constant overlows, we some erroneous program, so return + BIGGEST_ALIGNMENT to avoid any later ICE. */ + if (TREE_CONSTANT_OVERFLOW (exp)) + return BIGGEST_ALIGNMENT; + else if (host_integerp (exp, 0)) { c0 = tree_low_cst (exp, 0); c0 = c0 < 0 ? - c0 : c0; |