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| author | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-09-26 06:08:48 +0000 |
|---|---|---|
| committer | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-09-26 06:08:48 +0000 |
| commit | 7be9cf34730bc4c652297872e2a8ecd367e5e965 (patch) | |
| tree | bcba3cef0778f2f0b0d3e849894990e81a56635a | |
| parent | 9b46e58b5f991b44214160833eb1ee64fdc43718 (diff) | |
| download | gcc-7be9cf34730bc4c652297872e2a8ecd367e5e965.tar.gz | |
* expr.c (emit_move_insn_1): If there is no move pattern for the
original mode, try using a pattern for the corresponding integer mode.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@71816 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/expr.c | 11 |
2 files changed, 16 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6ead1c02d1b..534e99b493a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2003-09-26 Richard Sandiford <rsandifo@redhat.com> + * expr.c (emit_move_insn_1): If there is no move pattern for the + original mode, try using a pattern for the corresponding integer mode. + +2003-09-26 Richard Sandiford <rsandifo@redhat.com> + * combine.c (if_then_else_cond): Tighten mode check. 2003-09-25 Nathanael Nerode <neroden@gcc.gnu.org> diff --git a/gcc/expr.c b/gcc/expr.c index 633f4a75537..6ad93c506ab 100644 --- a/gcc/expr.c +++ b/gcc/expr.c @@ -3491,6 +3491,17 @@ emit_move_insn_1 (rtx x, rtx y) return emit_insn (GEN_FCN (insn_code) (x, y)); } + /* Try using a move pattern for the corresponding integer mode. This is + only safe when simplify_subreg can convert MODE constants into integer + constants. At present, it can only do this reliably if the value + fits within a HOST_WIDE_INT. */ + else if (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT + && (submode = int_mode_for_mode (mode)) != BLKmode + && mov_optab->handlers[submode].insn_code != CODE_FOR_nothing) + return emit_insn (GEN_FCN (mov_optab->handlers[submode].insn_code) + (simplify_gen_subreg (submode, x, mode, 0), + simplify_gen_subreg (submode, y, mode, 0))); + /* This will handle any multi-word or full-word mode that lacks a move_insn pattern. However, you will get better code if you define such patterns, even if they must turn into multiple assembler instructions. */ |