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[patch] h8300.md: Add comments for define_peephole2.
- From: Kazu Hirata <kazu at cs dot umass dot edu>
- To: gcc-patches at gcc dot gnu dot org
- Date: Sun, 01 Dec 2002 13:04:08 -0500 (EST)
- Subject: [patch] h8300.md: Add comments for define_peephole2.
Hi,
Attached is a patch to add comments for define_peephole2. Committed
as obvious.
Kazu Hirata
2002-12-01 Kazu Hirata <kazu@cs.umass.edu>
* config/h8300/h8300.md: Add comments for define_peephole2.
Index: h8300.md
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/h8300/h8300.md,v
retrieving revision 1.113
diff -u -r1.113 h8300.md
--- h8300.md 29 Nov 2002 16:24:58 -0000 1.113
+++ h8300.md 1 Dec 2002 17:59:21 -0000
@@ -2353,6 +2353,8 @@
;; PEEPHOLE PATTERNS
;; -----------------------------------------------------------------
+;; Convert (A >> B) & C to (A & 255) >> B if C == 255 >> B.
+
(define_peephole2
[(parallel
[(set (match_operand:HI 0 "register_operand" "")
@@ -2373,6 +2375,8 @@
(clobber (match_dup 2))])]
"")
+;; Convert (A << B) & C to (A & 255) << B if C == 255 << B.
+
(define_peephole2
[(parallel
[(set (match_operand:HI 0 "register_operand" "")
@@ -2393,6 +2397,8 @@
(clobber (match_dup 2))])]
"")
+;; Convert (A >> B) & C to (A & 255) >> B if C == 255 >> B.
+
(define_peephole2
[(parallel
[(set (match_operand:SI 0 "register_operand" "")
@@ -2413,6 +2419,8 @@
(clobber (match_dup 2))])]
"")
+;; Convert (A << B) & C to (A & 255) << B if C == 255 << B.
+
(define_peephole2
[(parallel
[(set (match_operand:SI 0 "register_operand" "")
@@ -2433,6 +2441,8 @@
(clobber (match_dup 2))])]
"")
+;; Convert (A >> B) & C to (A & 65535) >> B if C == 65535 >> B.
+
(define_peephole2
[(parallel
[(set (match_operand:SI 0 "register_operand" "")
@@ -2452,6 +2462,8 @@
(match_dup 1)))
(clobber (match_dup 2))])]
"")
+
+;; Convert (A << B) & C to (A & 65535) << B if C == 65535 << B.
(define_peephole2
[(parallel