[sdcc-devel] [ sdcc-Patches-1144962 ] peepholes with labelRefCount for the mcs51 port

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Patches item #1144962, was opened at 2005-02-20 19:21
Message generated for change (Comment added) made by frief
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Frieder Ferlemann (frief)
Assigned to: Nobody/Anonymous (nobody)
Summary: peepholes with labelRefCount for the mcs51 port

Initial Comment:
I'd like to post this peephole here in the hope it gets some  
testing prior to inclusion into SDCC.  
 
The appended peephole file keeps track of the changes in  
the reference counters for the labels. It makes use of the 
new peephole keyword labelRefCountChange  (SDCC 2.4.8 
>961).  
  
SDCC can thus f.e. remove an unneeded ret in the following  
code:  
  
void u( unsigned char c);  
void v( unsigned char c);  
  
void t( unsigned char c)  
{  
  if( c ==35 )  
     u(65);  
  else  
     v(8);  
}  
 

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>Comment By: Frieder Ferlemann (frief)
Date: 2005-03-30 20:13

Message:
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Appending the patch Hubert sent to me.

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Comment By: Hubert Sack (hsack)
Date: 2005-03-29 20:52

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I added 2 more Peepholes for more effective code generated 
by the changes done by me in RFE 11 62 453

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Comment By: Frieder Ferlemann (frief)
Date: 2005-03-21 21:19

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Thank you for testing. Will commit some time after 2.5.0 is out.

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Comment By: Hubert Sack (hsack)
Date: 2005-03-09 10:49

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I tested the new peephole file and could not find any errors. 
But my sourcecode is small and easy, so I think somemore 
testing with more complex sourcecode is recommended. 

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