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Annotation of 43BSD/lib/pcc/DEBUGS, revision 1.1.1.1

1.1       root        1: Copyright (c) 1985 Regents of the University of California.
                      2: All rights reserved.  The Berkeley software License Agreement
                      3: specifies the terms and conditions for redistribution.
                      4: 
                      5:        @(#)DEBUGS      5.1 (Berkeley) 1/8/86
                      6: 
                      7: WHAT THE DEBUG FLAGS MEAN:
                      8: 
                      9: Debug flags preceded with an X are first pass flags; the rest are
                     10: second pass flags.
                     11: 
                     12: -Xa:   Print the actions taken for each operator as parse trees are
                     13:        assembled, from buildtree().
                     14: 
                     15: -Xb:   Extra information from buildtree() on parse tree assembly.  May
                     16:        be used to increase the information from -Xa.
                     17: 
                     18: -Xd:   Print information about declarations, from many places in pftn.c.
                     19:        May be repeated to get still more information.
                     20: 
                     21: -Xi:   Information about initializations, from several places in pftn.c.
                     22: 
                     23: -a:    From rallo(), print the address of the tree being worked on for
                     24:        the purpose of allocating registers, and indicate what this
                     25:        tree's requirements have been determined to be.
                     26: 
                     27: -e:    Print the expression tree at useful places, e.g. when an
                     28:        expression appears in the intermediate code file as a
                     29:        statement, or just before store() is called in codgen().
                     30: 
                     31: -l:    Print line number and file name at the end of every statement.
                     32: 
                     33: -o:    Print the expression tree when order() is called, and whenever
                     34:        the loop in order() takes us to the top after a rewrite.  Also
                     35:        prints the tree with extra info when a rewrite is forced due
                     36:        lack of a matching template.
                     37: 
                     38: -r:    Identify the register being worked on and what's in it and
                     39:        sometimes why it's being worked on, from rfree(), rbusy() and
                     40:        reclaim().
                     41: 
                     42: -s:    From tshape(), print the address of the given node and the
                     43:        shape that it's being tested against.  The opcode for the node
                     44:        is also printed.
                     45: 
                     46: -t:    From ttype(), print the node type and the type template which
                     47:        the node is being tested against.
                     48: 
                     49: -u:    Previously used to debug the Sethi-Ullman algorithm, currently
                     50:        defunct.
                     51: 
                     52: -v:    Report on multi-level tree matching.  Very verbose.
                     53: 
                     54: -x:    Prints intermediate code instructions in mainp2(); also used to
                     55:        debug zzzcode(), the routine that does specialized template
                     56:        interpretation.

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