diff options
| author | Jan Hubicka <jh@suse.cz> | 2002-01-25 22:46:07 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2002-01-25 21:46:07 +0000 |
| commit | 48d79c431ebc7d3b5e41ffc3d331cce06ca6a8c0 (patch) | |
| tree | e33410df67450dee1a095f29c172688a6e343cd5 | |
| parent | 995b5904391de6b8060e74e21654ed2ec5c8cd76 (diff) | |
| download | gcc-48d79c431ebc7d3b5e41ffc3d331cce06ca6a8c0.zip gcc-48d79c431ebc7d3b5e41ffc3d331cce06ca6a8c0.tar.gz gcc-48d79c431ebc7d3b5e41ffc3d331cce06ca6a8c0.tar.bz2 | |
unroll.c (unroll_loop): Lower final_value to nonmemory operand; avoid it's copies.
* unroll.c (unroll_loop): Lower final_value to nonmemory operand;
avoid it's copies.
From-SVN: r49224
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/unroll.c | 15 |
2 files changed, 19 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 713d625..4304801 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Fri Jan 25 22:42:49 CET 2002 Jan Hubicka <jh@suse.cz> + + * unroll.c (unroll_loop): Lower final_value to nonmemory operand; + avoid it's copies. + Fri Jan 25 08:26:19 2002 Richard Kenner <kenner@vlsi1.ultra.nyu.edu> * builtins.c (expand_builtin_strncpy): Use integer_zerop instead diff --git a/gcc/unroll.c b/gcc/unroll.c index ecddc31..9a0cfcf 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -930,6 +930,19 @@ unroll_loop (loop, insn_count, strength_reduce_p) start_sequence (); + /* Final value may have form of (PLUS val1 const1_rtx). We need + to convert it into general operand, so compute the real value. */ + + if (GET_CODE (final_value) == PLUS) + { + final_value = expand_simple_binop (mode, PLUS, + copy_rtx (XEXP (final_value, 0)), + copy_rtx (XEXP (final_value, 1)), + NULL_RTX, 0, OPTAB_LIB_WIDEN); + } + if (!nonmemory_operand (final_value, VOIDmode)) + final_value = force_reg (mode, copy_rtx (final_value)); + /* Calculate the difference between the final and initial values. Final value may be a (plus (reg x) (const_int 1)) rtx. Let the following cse pass simplify this if initial value is @@ -949,7 +962,7 @@ unroll_loop (loop, insn_count, strength_reduce_p) so we can pretend that the overflow value is 0/~0. */ if (cc == NE || less_p != neg_inc) - diff = expand_simple_binop (mode, MINUS, copy_rtx (final_value), + diff = expand_simple_binop (mode, MINUS, final_value, copy_rtx (initial_value), NULL_RTX, 0, OPTAB_LIB_WIDEN); else |