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| author | Wei Guozhi <carrot@google.com> | 2010-07-07 17:55:27 +0000 |
|---|---|---|
| committer | Jing Yu <jingyu@gcc.gnu.org> | 2010-07-07 17:55:27 +0000 |
| commit | ece53c911447fb9632b4e0596b5ec3e3f0a4de77 (patch) | |
| tree | d4bea74ec43fb7211269386251a79889cd9cc06b /gcc/config | |
| parent | 9730bc27c97e294a05b6d71f82f500de2890056b (diff) | |
| download | gcc-ece53c911447fb9632b4e0596b5ec3e3f0a4de77.zip gcc-ece53c911447fb9632b4e0596b5ec3e3f0a4de77.tar.gz gcc-ece53c911447fb9632b4e0596b5ec3e3f0a4de77.tar.bz2 | |
thumb2.md (peephole2 to convert zero_extract/compare of lowest bits to lshift/compare): New.
2010-07-07 Wei Guozhi <carrot@google.com>
* config/arm/thumb2.md (peephole2 to convert zero_extract/compare
of lowest bits to lshift/compare): New.
From-SVN: r161929
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/arm/thumb2.md | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/config/arm/thumb2.md b/gcc/config/arm/thumb2.md index 2e03b8d..77f1ac4 100644 --- a/gcc/config/arm/thumb2.md +++ b/gcc/config/arm/thumb2.md @@ -1501,3 +1501,26 @@ VOIDmode, operands[0], const0_rtx); ") +(define_peephole2 + [(set (match_operand:CC_NOOV 0 "cc_register" "") + (compare:CC_NOOV (zero_extract:SI + (match_operand:SI 1 "low_register_operand" "") + (match_operand:SI 2 "const_int_operand" "") + (const_int 0)) + (const_int 0))) + (match_scratch:SI 3 "l") + (set (pc) + (if_then_else (match_operator:CC_NOOV 4 "equality_operator" + [(match_dup 0) (const_int 0)]) + (match_operand 5 "" "") + (match_operand 6 "" "")))] + "TARGET_THUMB2 + && (INTVAL (operands[2]) > 0 && INTVAL (operands[2]) < 32)" + [(parallel [(set (match_dup 0) + (compare:CC_NOOV (ashift:SI (match_dup 1) (match_dup 2)) + (const_int 0))) + (clobber (match_dup 3))]) + (set (pc) + (if_then_else (match_op_dup 4 [(match_dup 0) (const_int 0)]) + (match_dup 5) (match_dup 6)))] + ") |