diff options
| author | Richard Kenner <kenner@vlsi1.ultra.nyu.edu> | 1999-03-20 21:22:08 +0000 |
|---|---|---|
| committer | Richard Kenner <kenner@vlsi1.ultra.nyu.edu> | 1999-03-20 21:22:08 +0000 |
| commit | f0b3f39262c3a2f8e9d268842832ca8c0595c8ec (patch) | |
| tree | c776f0b5cc6db2e605f325591f50648b356da8c7 | |
| parent | 36ef2644ee6bdcf9be56b3af95bc4e9ad9a18c62 (diff) | |
(simplify_comparison): When making comparison in wider mode, check for
having commuted an AND and a SUBREG.
git-svn-id: https://gcc.gnu.org/svn/gcc/branches/premerge-fsf-branch@25873 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/combine.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 92c66264175..31d2814b6cd 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -1,5 +1,5 @@ /* Optimize by combining instructions for GNU compiler. - Copyright (C) 1987, 88, 92-97, 1998 Free Software Foundation, Inc. + Copyright (C) 1987, 88, 92-98, 1999 Free Software Foundation, Inc. This file is part of GNU CC. @@ -10257,6 +10257,17 @@ simplify_comparison (code, pop0, pop1) && (num_sign_bit_copies (op1, tmode) > GET_MODE_BITSIZE (tmode) - GET_MODE_BITSIZE (mode)))) { + /* If OP0 is an AND and we don't have an AND in MODE either, + make a new AND in the proper mode. */ + if (GET_CODE (op0) == AND + && (add_optab->handlers[(int) mode].insn_code + == CODE_FOR_nothing)) + op0 = gen_binary (AND, tmode, + gen_lowpart_for_combine (tmode, + XEXP (op0, 0)), + gen_lowpart_for_combine (tmode, + XEXP (op0, 1))); + op0 = gen_lowpart_for_combine (tmode, op0); op1 = gen_lowpart_for_combine (tmode, op1); break; |