diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 56 |
1 files changed, 56 insertions, 0 deletions
@@ -2203,6 +2203,42 @@ move_block_from_reg (regno, x, nregs, size) } } +/* Generate a PARALLEL rtx for a new non-consecutive group of registers from + ORIG, where ORIG is a non-consecutive group of registers represented by + a PARALLEL. The clone is identical to the original except in that the + original set of registers is replaced by a new set of pseudo registers. + The new set has the same modes as the original set. */ + +rtx +gen_group_rtx (orig) + rtx orig; +{ + int i, length; + rtx *tmps; + + if (GET_CODE (orig) != PARALLEL) + abort (); + + length = XVECLEN (orig, 0); + tmps = (rtx *) alloca (sizeof (rtx) * length); + + /* Skip a NULL entry in first slot. */ + i = XEXP (XVECEXP (orig, 0, 0), 0) ? 0 : 1; + + if (i) + tmps[0] = 0; + + for (; i < length; i++) + { + enum machine_mode mode = GET_MODE (XEXP (XVECEXP (orig, 0, i), 0)); + rtx offset = XEXP (XVECEXP (orig, 0, i), 1); + + tmps[i] = gen_rtx_EXPR_LIST (VOIDmode, gen_reg_rtx (mode), offset); + } + + return gen_rtx_PARALLEL (GET_MODE (orig), gen_rtvec_v (length, tmps)); +} + /* Emit code to move a block SRC to a block DST, where DST is non-consecutive registers represented by a PARALLEL. SSIZE represents the total size of block SRC in bytes, or -1 if not known. */ @@ -2324,6 +2360,26 @@ emit_group_load (dst, orig_src, ssize) emit_move_insn (XEXP (XVECEXP (dst, 0, i), 0), tmps[i]); } +/* Emit code to move a block SRC to block DST, where SRC and DST are + non-consecutive groups of registers, each represented by a PARALLEL. */ + +void +emit_group_move (dst, src) + rtx dst, src; +{ + int i; + + if (GET_CODE (src) != PARALLEL + || GET_CODE (dst) != PARALLEL + || XVECLEN (src, 0) != XVECLEN (dst, 0)) + abort (); + + /* Skip first entry if NULL. */ + for (i = XEXP (XVECEXP (src, 0, 0), 0) ? 0 : 1; i < XVECLEN (src, 0); i++) + emit_move_insn (XEXP (XVECEXP (dst, 0, i), 0), + XEXP (XVECEXP (src, 0, i), 0)); +} + /* Emit code to move a block SRC to a block DST, where SRC is non-consecutive registers represented by a PARALLEL. SSIZE represents the total size of block DST, or -1 if not known. */ |