diff options
| author | rask <rask@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-09-09 19:21:59 +0000 |
|---|---|---|
| committer | rask <rask@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-09-09 19:21:59 +0000 |
| commit | 7333737f42f1f2b00a32fe2fbed73915b2a045d1 (patch) | |
| tree | 9cf93feb394109316dfdca4d1a5926ddbe2320f6 /gcc/simplify-rtx.c | |
| parent | 1b3841036e9cc0005835cc32e5983598e809ec24 (diff) | |
| download | gcc-7333737f42f1f2b00a32fe2fbed73915b2a045d1.tar.gz | |
PR target/30315
* config/i386/i386.h (CANONICALIZE_COMPARISON): Delete.
* simplify-rtx.c (simplify_relational_operation_1): Add the
canonicalization from i386.h.
* doc/md.texi (Canonicalization of Instructions): Document it.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@128305 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index ac91f2fc92a..02f9e2b4c36 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -3813,6 +3813,12 @@ simplify_relational_operation_1 (enum rtx_code code, enum machine_mode mode, } } + /* Canonicalize (LTU/GEU (PLUS a b) b) as (LTU/GEU (PLUS a b) a). */ + if ((code == LTU || code == GEU) + && GET_CODE (op0) == PLUS + && rtx_equal_p (op1, XEXP (op0, 1))) + return simplify_gen_relational (code, mode, cmp_mode, op0, XEXP (op0, 0)); + if (op1 == const0_rtx) { /* Canonicalize (GTU x 0) as (NE x 0). */ |