RFE #2484693 and peephole improvements

[fw/sdcc] / doc / random-notes.txt

diff --git a/doc/random-notes.txt b/doc/random-notes.txt
index fc8f443d24aed5f59b21b5074f917aab48801a4f..301c6de537e14644a9957a6c7883f5e811ec3f4d 100644 (file)
--- a/doc/random-notes.txt
+++ b/doc/random-notes.txt
@@ -8,7 +8,7 @@ Lets trace how the register allocator in the mcs51 port works.
 
 Some concepts:
 eBBlock
 
 Some concepts:
 eBBlock

-       A basic block.  I cant remeber the conditions, but a basic block
+       A basic block.  I can't remember the conditions, but a basic block

 is one that is easy to optimise and analyse.  I guess this means that it has
 a nice set of assignments and a reasonably straight flow.
 iCode
 is one that is easy to optimise and analyse.  I guess this means that it has
 a nice set of assignments and a reasonably straight flow.
 iCode


@@ -33,14 +33,14 @@ In pseudo code,
        Remove any unneded iTemps that are just used in assignments.
        Mark anything that can be rematerialised as rematerialisable.
           There is no way I spelt that correctly.  Something is rematerialisable
        Remove any unneded iTemps that are just used in assignments.
        Mark anything that can be rematerialised as rematerialisable.
           There is no way I spelt that correctly.  Something is rematerialisable

-          if it can be generated easily and is constant, and hence dosnt need
+          if it can be generated easily and is constant, and hence dosn't need

           to be cached away in an iTemp.  An example is the address of something.
           to be cached away in an iTemp.  An example is the address of something.

-       Packs iTemps that are only used once into normally unavailble registers.
+       Packs iTemps that are only used once into normally unavailable registers.

     Register packing removes unneeded iTemps.
     Register packing removes unneeded iTemps.

-2.  Determine what number and type of regsiters are needed for each
+2.  Determine what number and type of registers are needed for each

     live range.
     It does
     live range.
     It does

-       If the iTemp lives for zero time, dont bother assigning
+       If the iTemp lives for zero time, don't bother assigning

        If its not an iTemp, skip for now.
        If its a conditional (determined in the register packing), skip as it will
        be stored in carry.
        If its not an iTemp, skip for now.
        If its a conditional (determined in the register packing), skip as it will
        be stored in carry.


@@ -103,7 +103,7 @@ iCode.
                   iCode when this icode is allocated.
 
         ->seq  - sequence number of the iCode given in
                   iCode when this icode is allocated.
 
         ->seq  - sequence number of the iCode given in

-                acesnding order of execution.
+                ascending order of execution.

 
 operand.
 -------
 
 operand.
 -------


@@ -180,7 +180,7 @@ It seems that IS_SPEC() is being set, deferencing *s so that it's size
 is sizeof(char) == 1.  It's either a SPECIFIER or a DECLARATOR - seems that
 were the wrong way around.  This is set in SDCCsymt.c, SDCCval.c, and the 
 yacc file. SDCCsymt.c and SDCCval.c havnt really changed in 5 days - must
 is sizeof(char) == 1.  It's either a SPECIFIER or a DECLARATOR - seems that
 were the wrong way around.  This is set in SDCCsymt.c, SDCCval.c, and the 
 yacc file. SDCCsymt.c and SDCCval.c havnt really changed in 5 days - must

-be SDCC.y.  Nope, no changes.  diff against 5 days ago shows only intersting
+be SDCC.y.  Nope, no changes.  diff against 5 days ago shows only interesting

 changes are in SDCCicode.  Same with -14 days.
 
 Michael
 changes are in SDCCicode.  Same with -14 days.
 
 Michael