Oops

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

diff --git a/src/mcs51/peeph.def b/src/mcs51/peeph.def
index a7c433e7ca463e944541df799d945c1408083807..2767ea86cfb6a69a65bc8aba96b46d6764d73902 100644 (file)
--- a/src/mcs51/peeph.def
+++ b/src/mcs51/peeph.def
@@ -219,6 +219,15 @@ replace {
 %2:
 } if labelInRange
 
+
+replace {
+        ljmp    %5
+} by {
+       ;       Peephole 244    replaced ljmp to ret with ret
+       ret
+} if labelIsReturnOnly
+
+
 replace {
         ljmp    %5
 %1:
@@ -2414,3 +2423,99 @@ replace {
 %3:
         sjmp    %5      
 } if labelInRange
+
+// applies to f.e. simplefloat.c (saving 1 cycle)
+replace {
+       mov     r%1,dpl
+       mov     a,r%1
+} by {
+        ;       Peephole 244.a  moving first to a instead of r%1
+       mov     a,dpl
+       mov     r%1,a
+}
+
+// applies to f.e. _itoa.c (saving 1 cycle)
+replace {
+       mov     r%1,dph
+       mov     a,r%1
+} by {
+        ;       Peephole 244.b  moving first to a instead of r%1
+       mov     a,dph
+       mov     r%1,a
+}
+
+
+// applies to f.e. bug-460010.c (saving 1 cycle)
+replace {
+       mov     r%1,a
+       mov     dpl,r%1
+} by {
+        ;       Peephole 244.c  loading dpl from a instead of r%1
+       mov     r%1,a
+       mov     dpl,a
+}
+
+replace {
+       mov     r%1,a
+       mov     dph,r%1
+} by {
+        ;       Peephole 244.d  loading dph from a instead of r%1
+       mov     r%1,a
+       mov     dph,a
+}
+
+// this one is safe but disables 245.a 245.b
+// please remove 245 if 245.a 245.b are found to be safe
+// applies to f.e. scott-compare.c
+replace {
+       clr     a
+       rlc     a
+       mov     r%1,a
+       cjne    a,#0x01,%2
+%2:    
+       clr     a
+       rlc     a
+       mov     r%1,a
+} by {
+        ;       Peephole 245    optimized complement (r%1 and acc set needed?)
+       cpl     c
+       clr     a
+       rlc     a
+       mov     r%1,a   
+} if labelRefCount %2 1
+
+// this one will not be triggered if 245 is present
+// please remove 245 if 245.a 245.b are found to be safe
+// applies to f.e. vprintf.c
+replace {
+       clr     a
+       rlc     a
+       mov     r%1,a
+       cjne    a,#0x01,%2
+%2:    
+       clr     a
+       rlc     a
+       mov     r%1,a
+       jz      %3
+} by {
+        ;       Peephole 245.a   optimized conditional jump (r%1 and acc not set!)
+       jc      %3
+} if labelRefCount %2 1
+
+// this one will not be triggered if 245 is present
+// please remove 245 if 245.a 245.b are found to be safe
+// applies to f.e. scott-compare.c
+replace {
+       clr     a
+       rlc     a
+       mov     r%1,a
+       cjne    a,#0x01,%2
+%2:    
+       clr     a
+       rlc     a
+       mov     r%1,a
+       jnz     %3
+} by {
+        ;       Peephole 245.b   optimized conditional jump (r%1 and acc not set!)
+       jnc     %3
+} if labelRefCount %2 1