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Diffstat (limited to 'code/tools/lcc/src/symbolic.c')
-rw-r--r--code/tools/lcc/src/symbolic.c494
1 files changed, 494 insertions, 0 deletions
diff --git a/code/tools/lcc/src/symbolic.c b/code/tools/lcc/src/symbolic.c
new file mode 100644
index 0000000..affa67a
--- /dev/null
+++ b/code/tools/lcc/src/symbolic.c
@@ -0,0 +1,494 @@
+#include <time.h>
+#include <ctype.h>
+#include "c.h"
+
+#define I(f) s_##f
+
+static Node *tail;
+static int off, maxoff, uid = 0, verbose = 0, html = 0;
+
+static const char *yyBEGIN(const char *tag) {
+ if (html)
+ print("<%s>", tag);
+ return tag;
+}
+
+static void yyEND(const char *tag) {
+ if (html)
+ print("</%s>", tag);
+ if (isupper(*tag))
+ print("\n");
+}
+
+#define BEGIN(tag) do { const char *yytag=yyBEGIN(#tag);
+#define END yyEND(yytag); } while (0)
+#define ITEM BEGIN(li)
+#define START BEGIN(LI)
+#define ANCHOR(attr,code) do { const char *yytag="a"; if (html) { printf("<a " #attr "=\""); code; print("\">"); }
+#define NEWLINE print(html ? "<br>\n" : "\n")
+
+static void emitCoord(Coordinate src) {
+ if (src.file && *src.file) {
+ ANCHOR(href,print("%s", src.file)); print("%s", src.file); END;
+ print(":");
+ }
+ print("%d.%d", src.y, src.x);
+}
+
+static void emitString(int len, const char *s) {
+ for ( ; len-- > 0; s++)
+ if (*s == '&' && html)
+ print("&amp;");
+ else if (*s == '<' && html)
+ print("&lt;");
+ else if (*s == '>' && html)
+ print("&lt;");
+ else if (*s == '"' || *s == '\\')
+ print("\\%c", *s);
+ else if (*s >= ' ' && *s < 0177)
+ print("%c", *s);
+ else
+ print("\\%d%d%d", (*s>>6)&3, (*s>>3)&7, *s&7);
+}
+
+static void emitSymRef(Symbol p) {
+ (*IR->defsymbol)(p);
+ ANCHOR(href,print("#%s", p->x.name)); BEGIN(code); print("%s", p->name); END; END;
+}
+
+static void emitSymbol(Symbol p) {
+ (*IR->defsymbol)(p);
+ ANCHOR(name,print("%s", p->x.name)); BEGIN(code); print("%s", p->name); END; END;
+ BEGIN(ul);
+#define xx(field,code) ITEM; if (!html) print(" "); print(#field "="); code; END
+ if (verbose && (src.y || src.x))
+ xx(src,emitCoord(p->src));
+ xx(type,print("%t", p->type));
+ xx(sclass,print("%k", p->sclass));
+ switch (p->scope) {
+ case CONSTANTS: xx(scope,print("CONSTANTS")); break;
+ case LABELS: xx(scope,print("LABELS")); break;
+ case GLOBAL: xx(scope,print("GLOBAL")); break;
+ case PARAM: xx(scope,print("PARAM")); break;
+ case LOCAL: xx(scope,print("LOCAL")); break;
+ default:
+ if (p->scope > LOCAL)
+ xx(scope,print("LOCAL+%d", p->scope-LOCAL));
+ else
+ xx(scope,print("%d", p->scope));
+ }
+ if (p->scope >= PARAM && p->sclass != STATIC)
+ xx(offset,print("%d", p->x.offset));
+ xx(ref,print("%f", p->ref));
+ if (p->temporary && p->u.t.cse)
+ xx(u.t.cse,print("%p", p->u.t.cse));
+ END;
+#undef xx
+}
+
+/* address - initialize q for addressing expression p+n */
+static void I(address)(Symbol q, Symbol p, long n) {
+ q->name = stringf("%s%s%D", p->name, n > 0 ? "+" : "", n);
+ (*IR->defsymbol)(q);
+ START; print("address "); emitSymbol(q); END;
+}
+
+/* blockbeg - start a block */
+static void I(blockbeg)(Env *e) {
+ e->offset = off;
+ START; print("blockbeg off=%d", off); END;
+}
+
+/* blockend - start a block */
+static void I(blockend)(Env *e) {
+ if (off > maxoff)
+ maxoff = off;
+ START; print("blockend off=%d", off); END;
+ off = e->offset;
+}
+
+/* defaddress - initialize an address */
+static void I(defaddress)(Symbol p){
+ START; print("defaddress "); emitSymRef(p); END;
+}
+
+/* defconst - define a constant */
+static void I(defconst)(int suffix, int size, Value v) {
+ START;
+ print("defconst ");
+ switch (suffix) {
+ case I:
+ print("int.%d ", size);
+ BEGIN(code);
+ if (size > sizeof (int))
+ print("%D", v.i);
+ else
+ print("%d", (int)v.i);
+ END;
+ break;
+ case U:
+ print("unsigned.%d ", size);
+ BEGIN(code);
+ if (size > sizeof (unsigned))
+ print("%U", v.u);
+ else
+ print("%u", (unsigned)v.u);
+ END;
+ break;
+ case P: print("void*.%d ", size); BEGIN(code); print("%p", v.p); END; break;
+ case F: print("float.%d ", size); BEGIN(code); print("%g", (double)v.d); END; break;
+ default: assert(0);
+ }
+ END;
+}
+
+/* defstring - emit a string constant */
+static void I(defstring)(int len, char *s) {
+ START; print("defstring ");
+ BEGIN(code); print("\""); emitString(len, s); print("\""); END;
+ END;
+}
+
+/* defsymbol - define a symbol: initialize p->x */
+static void I(defsymbol)(Symbol p) {
+ if (p->x.name == NULL)
+ p->x.name = stringd(++uid);
+}
+
+/* emit - emit the dags on list p */
+static void I(emit)(Node p){
+ ITEM;
+ if (!html)
+ print(" ");
+ for (; p; p = p->x.next) {
+ if (p->op == LABEL+V) {
+ assert(p->syms[0]);
+ ANCHOR(name,print("%s", p->syms[0]->x.name));
+ BEGIN(code); print("%s", p->syms[0]->name); END;
+ END;
+ print(":");
+ } else {
+ int i;
+ if (p->x.listed) {
+ BEGIN(strong); print("%d", p->x.inst); END; print("'");
+ print(" %s", opname(p->op));
+ } else
+ print("%d. %s", p->x.inst, opname(p->op));
+ if (p->count > 1)
+ print(" count=%d", p->count);
+ for (i = 0; i < NELEMS(p->kids) && p->kids[i]; i++)
+ print(" #%d", p->kids[i]->x.inst);
+ if (generic(p->op) == CALL && p->syms[0] && p->syms[0]->type)
+ print(" {%t}", p->syms[0]->type);
+ else
+ for (i = 0; i < NELEMS(p->syms) && p->syms[i]; i++) {
+ print(" ");
+ if (p->syms[i]->scope == CONSTANTS)
+ print(p->syms[i]->name);
+ else
+ emitSymRef(p->syms[i]);
+ }
+ }
+ NEWLINE;
+ }
+ END;
+}
+
+/* export - announce p as exported */
+static void I(export)(Symbol p) {
+ START; print("export "); emitSymRef(p); END;
+}
+
+/* function - generate code for a function */
+static void I(function)(Symbol f, Symbol caller[], Symbol callee[], int ncalls) {
+ int i;
+
+ (*IR->defsymbol)(f);
+ off = 0;
+ for (i = 0; caller[i] && callee[i]; i++) {
+ off = roundup(off, caller[i]->type->align);
+ caller[i]->x.offset = callee[i]->x.offset = off;
+ off += caller[i]->type->size;
+ }
+ if (!html) {
+ print("function ");
+ emitSymbol(f);
+ print(" ncalls=%d\n", ncalls);
+ for (i = 0; caller[i]; i++)
+ START; print("caller "); emitSymbol(caller[i]); END;
+ for (i = 0; callee[i]; i++)
+ START; print("callee "); emitSymbol(callee[i]); END;
+ } else {
+ START;
+ print("function");
+ BEGIN(UL);
+#define xx(field,code) ITEM; print(#field "="); code; END
+ xx(f,emitSymbol(f));
+ xx(ncalls,print("%d", ncalls));
+ if (caller[0]) {
+ ITEM; print("caller"); BEGIN(OL);
+ for (i = 0; caller[i]; i++)
+ ITEM; emitSymbol(caller[i]); END;
+ END; END;
+ ITEM; print("callee"); BEGIN(OL);
+ for (i = 0; callee[i]; i++)
+ ITEM; emitSymbol(callee[i]); END;
+ END; END;
+ } else {
+ xx(caller,BEGIN(em); print("empty"); END);
+ xx(callee,BEGIN(em); print("empty"); END);
+ }
+ END;
+ END;
+ }
+ maxoff = off = 0;
+ gencode(caller, callee);
+ if (html)
+ START; print("emitcode"); BEGIN(ul); emitcode(); END; END;
+ else
+ emitcode();
+ START; print("maxoff=%d", maxoff); END;
+#undef xx
+}
+
+/* visit - generate code for *p */
+static int visit(Node p, int n) {
+ if (p && p->x.inst == 0) {
+ p->x.inst = ++n;
+ n = visit(p->kids[0], n);
+ n = visit(p->kids[1], n);
+ *tail = p;
+ tail = &p->x.next;
+ }
+ return n;
+}
+
+/* gen0 - generate code for the dags on list p */
+static Node I(gen)(Node p) {
+ int n;
+ Node nodelist;
+
+ tail = &nodelist;
+ for (n = 0; p; p = p->link) {
+ switch (generic(p->op)) { /* check for valid forest */
+ case CALL:
+ assert(IR->wants_dag || p->count == 0);
+ break;
+ case ARG:
+ case ASGN: case JUMP: case LABEL: case RET:
+ case EQ: case GE: case GT: case LE: case LT: case NE:
+ assert(p->count == 0);
+ break;
+ case INDIR:
+ assert(IR->wants_dag && p->count > 0);
+ break;
+ default:
+ assert(0);
+ }
+ check(p);
+ p->x.listed = 1;
+ n = visit(p, n);
+ }
+ *tail = 0;
+ return nodelist;
+}
+
+/* global - announce a global */
+static void I(global)(Symbol p) {
+ START; print("global "); emitSymbol(p); END;
+}
+
+/* import - import a symbol */
+static void I(import)(Symbol p) {
+ START; print("import "); emitSymRef(p); END;
+}
+
+/* local - local variable */
+static void I(local)(Symbol p) {
+ if (p->temporary)
+ p->name = stringf("t%s", p->name);
+ (*IR->defsymbol)(p);
+ off = roundup(off, p->type->align);
+ p->x.offset = off;
+ off += p->type->size;
+ START; print(p->temporary ? "temporary " : "local "); emitSymbol(p); END;
+}
+
+/* progbeg - beginning of program */
+static void I(progbeg)(int argc, char *argv[]) {
+ int i;
+
+ for (i = 1; i < argc; i++)
+ if (strcmp(argv[i], "-v") == 0)
+ verbose++;
+ else if (strcmp(argv[i], "-html") == 0)
+ html++;
+ if (html) {
+ print("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2 Final//EN\">\n");
+ print("<html>");
+ BEGIN(head);
+ if (firstfile && *firstfile)
+ BEGIN(title); emitString(strlen(firstfile), firstfile); END;
+ print("<link rev=made href=\"mailto:drh@microsoft.com\">\n");
+ END;
+ print("<body>\n");
+ if (firstfile && *firstfile)
+ BEGIN(h1); emitString(strlen(firstfile), firstfile); END;
+ BEGIN(P); BEGIN(em);
+ print("Links lead from uses of identifiers and labels to their definitions.");
+ END; END;
+ print("<ul>\n");
+ START;
+ print("progbeg");
+ BEGIN(ol);
+ for (i = 1; i < argc; i++) {
+ ITEM;
+ BEGIN(code); print("\""); emitString(strlen(argv[i]), argv[i]); print("\""); END;
+ END;
+ }
+ END;
+ END;
+ }
+}
+
+/* progend - end of program */
+static void I(progend)(void) {
+ START; print("progend"); END;
+ if (html) {
+ time_t t;
+ print("</ul>\n");
+ time(&t);
+ print("<hr><address>%s</address>\n", ctime(&t));
+ print("</body></html>\n");
+ }
+}
+
+/* segment - switch to segment s */
+static void I(segment)(int s) {
+ START; print("segment %s", &"text\0bss\0.data\0lit\0.sym\0."[5*s-5]); END;
+}
+
+/* space - initialize n bytes of space */
+static void I(space)(int n) {
+ START; print("space %d", n); END;
+}
+
+static void I(stabblock)(int brace, int lev, Symbol *p) {}
+
+/* stabend - finalize stab output */
+static void I(stabend)(Coordinate *cp, Symbol p, Coordinate **cpp, Symbol *sp, Symbol *stab) {
+ int i;
+
+ if (p)
+ emitSymRef(p);
+ print("\n");
+ if (cpp && sp)
+ for (i = 0; cpp[i] && sp[i]; i++) {
+ print("%w.%d: ", cpp[i], cpp[i]->x);
+ emitSymRef(sp[i]);
+ print("\n");
+ }
+}
+
+static void I(stabfend)(Symbol p, int lineno) {}
+static void I(stabinit)(char *file, int argc, char *argv[]) {}
+
+/* stabline - emit line number information for source coordinate *cp */
+static void I(stabline)(Coordinate *cp) {
+ if (cp->file)
+ print("%s:", cp->file);
+ print("%d.%d:\n", cp->y, cp->x);
+}
+
+static void I(stabsym)(Symbol p) {}
+static void I(stabtype)(Symbol p) {}
+
+Interface symbolicIR = {
+ {1, 1, 0}, /* char */
+ {2, 2, 0}, /* short */
+ {4, 4, 0}, /* int */
+ {4, 4, 0}, /* long */
+ {4, 4, 0}, /* long long */
+ {4, 4, 1}, /* float */
+ {8, 8, 1}, /* double */
+ {8, 8, 1}, /* long double */
+ {4, 4, 0}, /* T* */
+ {0, 4, 0}, /* struct */
+ 0, /* little_endian */
+ 0, /* mulops_calls */
+ 0, /* wants_callb */
+ 1, /* wants_argb */
+ 1, /* left_to_right */
+ 1, /* wants_dag */
+ 0, /* unsigned_char */
+ I(address),
+ I(blockbeg),
+ I(blockend),
+ I(defaddress),
+ I(defconst),
+ I(defstring),
+ I(defsymbol),
+ I(emit),
+ I(export),
+ I(function),
+ I(gen),
+ I(global),
+ I(import),
+ I(local),
+ I(progbeg),
+ I(progend),
+ I(segment),
+ I(space),
+ I(stabblock),
+ I(stabend),
+ I(stabfend),
+ I(stabinit),
+ I(stabline),
+ I(stabsym),
+ I(stabtype)
+};
+
+Interface symbolic64IR = {
+ {1, 1, 0}, /* char */
+ {2, 2, 0}, /* short */
+ {4, 4, 0}, /* int */
+ {8, 8, 0}, /* long */
+ {8, 8, 0}, /* long long */
+ {4, 4, 1}, /* float */
+ {8, 8, 1}, /* double */
+ {8, 8, 1}, /* long double */
+ {8, 8, 0}, /* T* */
+ {0, 1, 0}, /* struct */
+ 1, /* little_endian */
+ 0, /* mulops_calls */
+ 0, /* wants_callb */
+ 1, /* wants_argb */
+ 1, /* left_to_right */
+ 1, /* wants_dag */
+ 0, /* unsigned_char */
+ I(address),
+ I(blockbeg),
+ I(blockend),
+ I(defaddress),
+ I(defconst),
+ I(defstring),
+ I(defsymbol),
+ I(emit),
+ I(export),
+ I(function),
+ I(gen),
+ I(global),
+ I(import),
+ I(local),
+ I(progbeg),
+ I(progend),
+ I(segment),
+ I(space),
+ I(stabblock),
+ I(stabend),
+ I(stabfend),
+ I(stabinit),
+ I(stabline),
+ I(stabsym),
+ I(stabtype)
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 05:29:16 +0000