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| author | Hans-Peter Nilsson <hp@axis.com> | 2007-09-10 07:30:16 +0000 |
|---|---|---|
| committer | Hans-Peter Nilsson <hp@gcc.gnu.org> | 2007-09-10 07:30:16 +0000 |
| commit | cf369845fd042cc7bd25cb8b824857af6f22f446 (patch) | |
| tree | d935db8207d63d42c6ee9905193bb02d1356dfd1 /gcc/simplify-rtx.c | |
| parent | 3b010fe32e4a3dde31344cf518daf0b016da5401 (diff) | |
| download | gcc-cf369845fd042cc7bd25cb8b824857af6f22f446.zip gcc-cf369845fd042cc7bd25cb8b824857af6f22f446.tar.gz gcc-cf369845fd042cc7bd25cb8b824857af6f22f446.tar.bz2 | |
simplify-rtx.c (simplify_relational_operation_1): For recent canonicalization, don't recurse if op1 equals both PLUS arguments.
* simplify-rtx.c (simplify_relational_operation_1): For recent
canonicalization, don't recurse if op1 equals both PLUS arguments.
From-SVN: r128323
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 02f9e2b..329a0ff 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -3816,7 +3816,9 @@ 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))) + && rtx_equal_p (op1, XEXP (op0, 1)) + /* Don't recurse "infinitely" for (LTU/GEU (PLUS b b) b). */ + && !rtx_equal_p (op1, XEXP (op0, 0))) return simplify_gen_relational (code, mode, cmp_mode, op0, XEXP (op0, 0)); if (op1 == const0_rtx) |