* src/SDCCpeeph.c (deadMove),

[fw/sdcc] / src / mcs51 / peeph.def

diff --git a/src/mcs51/peeph.def b/src/mcs51/peeph.def
index feab2599b201b4e814aa9cad9fffbbdb123c41dd..e0ea01950bc2b68fd0e8b3ddf6cbae2cc6453525 100644 (file)
--- a/src/mcs51/peeph.def
+++ b/src/mcs51/peeph.def
@@ -1,20 +1,3 @@
-//replace restart {
-//       pop  %1
-//       push %1
-//} by {
-//       ;       Peephole 1     removed pop %1 push %1 (not push pop)
-//}
-
-//replace restart {
-//       pop  %1
-//       mov  %2,%3
-//       push %1
-//} by {
-//       ;       Peephole 2     removed pop %1 push %1 (not push pop)
-//       mov  %2,%3
-//}
-
-//
 // added by Jean Louis VERN for
 // his shift stuff
 replace {
@@ -4609,9 +4592,22 @@ replace {
 } if labelRefCount(%3 1), labelRefCountChange(%3 -1)
 
 
+replace restart {
+       pop     ar%1
+} by {
+       ;       Peephole 300    pop ar%1 removed
+} if deadMove %1
+
+replace {
+       mov     r%1,%2
+} by {
+       ;       Peephole 301    mov r%1,%2 removed
+} if notVolatile(%2), deadMove(%1)
+
+
 // should be one of the last peepholes
 replace{
 %1:
 } by {
-       ;       Peephole 300    removed redundant label %1
+       ;       Peephole 400    removed redundant label %1
 } if labelRefCount(%1 0)