diff options
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 1f603711cf7..ad003d83cd5 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -3224,9 +3224,7 @@ simplify_binary_operation_1 (enum rtx_code code, machine_mode mode, GET_MODE (SUBREG_REG (op0)), XEXP (SUBREG_REG (op0), 0), tmp); - return simplify_gen_subreg (mode, tmp, inner_mode, - subreg_lowpart_offset (mode, - inner_mode)); + return lowpart_subreg (mode, tmp, inner_mode); } canonicalize_shift: if (SHIFT_COUNT_TRUNCATED && CONST_INT_P (op1)) @@ -6027,6 +6025,17 @@ simplify_gen_subreg (machine_mode outermode, rtx op, return NULL_RTX; } +/* Generates a subreg to get the least significant part of EXPR (in mode + INNER_MODE) to OUTER_MODE. */ + +rtx +lowpart_subreg (machine_mode outer_mode, rtx expr, + machine_mode inner_mode) +{ + return simplify_gen_subreg (outer_mode, expr, inner_mode, + subreg_lowpart_offset (outer_mode, inner_mode)); +} + /* Simplify X, an rtx expression. Return the simplified expression or NULL if no simplifications |