* config/h8300/h8300.md (a peephole2): Remove useless code.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@65039 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index be4f3dd..871f972 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2003-03-30  Kazu Hirata  <kazu@cs.umass.edu>
+
+       * config/h8300/h8300.md (a peephole2): Remove useless code.
+
 2003-03-29  Kazu Hirata  <kazu@cs.umass.edu>
 
        * config/h8300/h8300.md (*iorsi3_and_ashift): New.

diff --git a/gcc/config/h8300/h8300.md b/gcc/config/h8300/h8300.md
index 8c8ed6d..b63ed49 100644 (file)
--- a/gcc/config/h8300/h8300.md
+++ b/gcc/config/h8300/h8300.md
@@ -3934,6 +3934,9 @@
                     (const_int 8)))]
   "")
 
+;; If a load of mem:SI is followed by an AND that turns off the upper
+;; half, then we can load mem:HI instead.
+
 (define_peephole2
   [(set (match_operand:SI 0 "register_operand" "")
        (match_operand:SI 1 "memory_operand" ""))
@@ -3941,7 +3944,7 @@
        (and:SI (match_dup 0)
                (match_operand:SI 2 "const_int_operand" "")))]
   "(TARGET_H8300H || TARGET_H8300S)
-   && !(GET_CODE (operands[1]) == MEM && MEM_VOLATILE_P (operands[1]))
+   && !MEM_VOLATILE_P (operands[1])
    && (INTVAL (operands[2]) & ~0xffff) == 0
    && INTVAL (operands[2]) != 255"
   [(set (match_dup 3)