diff options
Diffstat (limited to 'gcc/expr.cc')
| -rw-r--r-- | gcc/expr.cc | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/gcc/expr.cc b/gcc/expr.cc index 1c5874b..868fa6e 100644 --- a/gcc/expr.cc +++ b/gcc/expr.cc @@ -12952,12 +12952,16 @@ expand_single_bit_test (location_t loc, enum tree_code code, rtx inner0 = expand_expr (inner, NULL_RTX, VOIDmode, EXPAND_NORMAL); + if (CONST_SCALAR_INT_P (inner0)) + { + wide_int t = rtx_mode_t (inner0, operand_mode); + bool setp = (wi::lrshift (t, bitnum) & 1) != 0; + return (setp ^ (code == EQ_EXPR)) ? const1_rtx : const0_rtx; + } int bitpos = bitnum; - scalar_int_mode imode = as_a <scalar_int_mode>(GET_MODE (inner0)); - if (BYTES_BIG_ENDIAN) - bitpos = GET_MODE_BITSIZE (imode) - 1 - bitpos; + bitpos = GET_MODE_BITSIZE (operand_mode) - 1 - bitpos; inner0 = extract_bit_field (inner0, 1, bitpos, 1, target, operand_mode, mode, 0, NULL); |