65c2a8a0ae
This feature has never been used since its introduction, more than 3 years ago, in David Given's commitc93cb69of May 8, 2013. The commit was for "PowerPC and M68K work". I am not undoing the entire commit. I am only removing the stackadjust and stackoffset() feature. This commit removes the feature from my branch kernigh-linuxppc. This removal includes the mach/proto/ncg parts. The default branch already removed most of the feature, but kept the mach/proto/ncg parts. That removal happened in commit81778b6of May 13, 2013 (which was a merge; git diffaf0dede81778b6). The branch dtrg-experimental-powerpc merged the default branch but without the removal. That merge was commit4703db0fof Sep 15, 2016 (git diff8c94b134703db0). My branch kernigh-linuxppc is off branch dtrg-experimental-powerpc, so I can no longer get the removal by merging default. David Given described the stackadjust feature in https://sourceforge.net/p/tack/mailman/message/30814691/ The instruction stackadjust would add a value to the offset, and the function stackoffset() would return this offset. One would use this to track sp - fp, then omit the frame pointer by not keeping fp in a register.
57 lines
2.6 KiB
C
57 lines
2.6 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Id$ */
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extern int maxply; /* amount of lookahead allowed */
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extern int stackheight; /* # of tokens on fakestack */
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extern token_t fakestack[]; /* fakestack itself */
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extern int nallreg; /* number of allocated registers */
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extern int allreg[]; /* array of allocated registers */
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extern token_p curtoken; /* pointer to current token */
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extern result_t dollar[]; /* Values of $1,$2 etc.. */
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extern int nemlines; /* # of EM instructions in core */
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extern struct emline emlines[]; /* EM instructions itself */
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extern struct emline *emp; /* pointer to current instr */
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extern struct emline *saveemp; /* pointer to start of pattern */
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extern int tokpatlen; /* length of current stackpattern */
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extern rl_p curreglist; /* side effect of findcoerc() */
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#ifndef NDEBUG
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extern int Debug; /* on/off debug printout */
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#endif
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/*
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* Next descriptions are external declarations for tables created
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* by bootgram.
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* All definitions are to be found in tables.c (Not for humans)
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*/
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extern byte coderules[]; /* pseudo code for cg itself */
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extern char stregclass[]; /* static register class */
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extern struct reginfo machregs[]; /* register info */
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extern tkdef_t tokens[]; /* token info */
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extern node_t enodes[]; /* expression nodes */
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extern string codestrings[]; /* table of strings */
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extern set_t machsets[]; /* token expression table */
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extern inst_t tokeninstances[]; /* token instance description table */
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extern move_t moves[]; /* move descriptors */
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extern test_t tests[]; /* test descriptors */
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extern byte pattern[]; /* EM patterns */
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extern int pathash[256]; /* Indices into previous */
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extern c1_t c1coercs[]; /* coercions type 1 */
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#ifdef MAXSPLIT
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extern c2_t c2coercs[]; /* coercions type 2 */
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#endif /* MAXSPLIT */
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extern c3_t c3coercs[]; /* coercions type 3 */
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extern struct reginfo **reglist[]; /* lists of registers per property */
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#define eqregclass(r1,r2) (stregclass[r1]==stregclass[r2])
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#ifdef REGVARS
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extern int nregvar[]; /* # of register variables per type */
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extern int *rvnumbers[]; /* lists of numbers */
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#endif
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extern FILE *codefile;
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extern FILE *freopen();
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