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ack/util/ego/ud/ud_copy.h

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Header --> Id
1994-06-24 11:31:16 +00:00
/* $Id$ */
Added copyright notice
1987-03-09 19:15:41 +00:00
/*
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
Initial revision
1984-11-26 14:35:32 +00:00
/* C O P Y P R O P A G A T I O N */
extern line_p *copies; /* table of copies; every entry points to the
* store-instruction.
*/
extern short *def_to_copynr; /* Table that maps a 'definition'-number to a
* 'copy' number.
*/
extern short nrcopies; /* number of copies in the current procedure
* (length of copies-table)
*/
More void, fewer clang warnings in util/ego Most warnings are for functions implicitly returning int. Change most of these functions to return void. (Traditional K&R C had no void type, but C89 has it.) Add prototypes to most function declarations in headers. This is easy, because ego declares most of its extern functions, and the comments listed most parameters. There were a few outdated or missing declarations, and a few .c files that failed to include an .h with the declarations. Add prototypes to a few function definitions in .c files. Most functions still have traditional K&R definitions. Most STATIC functions still don't have prototypes, because they have no earlier declaration where I would have added the prototype. Change some prototypes in util/ego/share/alloc.h. Functions newmap() and oldmap() handle an array of pointers to something; change the array's type from `short **` to `void **`. Callers use casts to go between `void **` and the correct type, like `line_p *`. Function oldtable() takes a `short *`, not a `short **`; I added the wrong type in 5bbbaf4. Make a few other changes to silence warnings. There are a few places where clang wants extra parentheses in the code. Edit util/ego/ra/build.lua to add the missing dependency on ra*.h; I needed this to prevent crashes from ra.
2019-10-31 22:05:22 +00:00
void copy_analysis(proc_p p); /*
Initial revision
1984-11-26 14:35:32 +00:00
* Determine which copies procedure p has.
* Compute C_IN(b), for every basic block b.
*/
More void, fewer clang warnings in util/ego Most warnings are for functions implicitly returning int. Change most of these functions to return void. (Traditional K&R C had no void type, but C89 has it.) Add prototypes to most function declarations in headers. This is easy, because ego declares most of its extern functions, and the comments listed most parameters. There were a few outdated or missing declarations, and a few .c files that failed to include an .h with the declarations. Add prototypes to a few function definitions in .c files. Most functions still have traditional K&R definitions. Most STATIC functions still don't have prototypes, because they have no earlier declaration where I would have added the prototype. Change some prototypes in util/ego/share/alloc.h. Functions newmap() and oldmap() handle an array of pointers to something; change the array's type from `short **` to `void **`. Callers use casts to go between `void **` and the correct type, like `line_p *`. Function oldtable() takes a `short *`, not a `short **`; I added the wrong type in 5bbbaf4. Make a few other changes to silence warnings. There are a few places where clang wants extra parentheses in the code. Edit util/ego/ra/build.lua to add the missing dependency on ra*.h; I needed this to prevent crashes from ra.
2019-10-31 22:05:22 +00:00
bool is_copy(line_p def); /*
Initial revision
1984-11-26 14:35:32 +00:00
* See if the definition def is also a 'copy',
* i.e. an statement of the form
* 'A := B' (or, in EM terminology:
* a sequence 'Load Variable; Store Variable').
*/
More void, fewer clang warnings in util/ego Most warnings are for functions implicitly returning int. Change most of these functions to return void. (Traditional K&R C had no void type, but C89 has it.) Add prototypes to most function declarations in headers. This is easy, because ego declares most of its extern functions, and the comments listed most parameters. There were a few outdated or missing declarations, and a few .c files that failed to include an .h with the declarations. Add prototypes to a few function definitions in .c files. Most functions still have traditional K&R definitions. Most STATIC functions still don't have prototypes, because they have no earlier declaration where I would have added the prototype. Change some prototypes in util/ego/share/alloc.h. Functions newmap() and oldmap() handle an array of pointers to something; change the array's type from `short **` to `void **`. Callers use casts to go between `void **` and the correct type, like `line_p *`. Function oldtable() takes a `short *`, not a `short **`; I added the wrong type in 5bbbaf4. Make a few other changes to silence warnings. There are a few places where clang wants extra parentheses in the code. Edit util/ego/ra/build.lua to add the missing dependency on ra*.h; I needed this to prevent crashes from ra.
2019-10-31 22:05:22 +00:00
void fold_var(line_p old, line_p new, bblock_p b);
/*
Initial revision
1984-11-26 14:35:32 +00:00
* The variable referenced by the
* EM instruction 'old' must be replaced
* by the variable referenced by 'new'.
*/
More void, fewer clang warnings in util/ego Most warnings are for functions implicitly returning int. Change most of these functions to return void. (Traditional K&R C had no void type, but C89 has it.) Add prototypes to most function declarations in headers. This is easy, because ego declares most of its extern functions, and the comments listed most parameters. There were a few outdated or missing declarations, and a few .c files that failed to include an .h with the declarations. Add prototypes to a few function definitions in .c files. Most functions still have traditional K&R definitions. Most STATIC functions still don't have prototypes, because they have no earlier declaration where I would have added the prototype. Change some prototypes in util/ego/share/alloc.h. Functions newmap() and oldmap() handle an array of pointers to something; change the array's type from `short **` to `void **`. Callers use casts to go between `void **` and the correct type, like `line_p *`. Function oldtable() takes a `short *`, not a `short **`; I added the wrong type in 5bbbaf4. Make a few other changes to silence warnings. There are a few places where clang wants extra parentheses in the code. Edit util/ego/ra/build.lua to add the missing dependency on ra*.h; I needed this to prevent crashes from ra.
2019-10-31 22:05:22 +00:00
bool value_retained(line_p copy, short defnr, line_p use, bblock_p b);
/*
Initial revision
1984-11-26 14:35:32 +00:00
* See if the right hand side variable of the
* copy still has the same value at 'use'.
* If the copy and the use are in the same
* basic block (defnr = 0), search from the
* copy to the use, to see if the rhs variable
* is changed. If the copy is in another block,
* defnr is the definition-number of the copy.
* Search from the beginning of the block to
* the use, to see if the rhs is changed;
* if not, check that the copy is in C_IN(b).
*/
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