qbe

commit e53054c0764bd088b51f893dcb33b5321422eff7
parent b5d98b762f5838a9d2659ac6619f343f61970201
Author: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date:   Thu,  8 Oct 2015 22:02:32 -0400

allow multiple functions in file

Diffstat:
M
lisc/emit.c
 | 
1
-
M
lisc/lisc.h
 | 
2
+-
M
lisc/main.c
 | 
70
++++++++++++++++++++++++++++++++++++++++------------------------------
M
lisc/parse.c
 | 
16
++++------------

4 files changed, 45 insertions(+), 44 deletions(-)
diff --git a/lisc/emit.c b/lisc/emit.c
@@ -383,7 +383,6 @@ emitdat(Dat *d, FILE *f)
 		fprintf(f, ".data\n");
 		break;
 	case DEnd:
-		fprintf(f, "\n");
 		break;
 	case DName:
 		fprintf(f,
diff --git a/lisc/lisc.h b/lisc/lisc.h
@@ -307,7 +307,7 @@ Ref getcon(int64_t, Fn *);
 
 /* parse.c */
 extern OpDesc opdesc[NOp];
-Fn *parse(FILE *, void (Dat *));
+void parse(FILE *, void (Dat *), void (Fn *));
 void printfn(Fn *, FILE *);
 
 /* ssa.c */
diff --git a/lisc/main.c b/lisc/main.c
@@ -10,6 +10,8 @@ char debug['Z'+1] = {
 	['R'] = 0, /* reg. allocation */
 };
 
+static int dbg;
+
 void
 dumpts(Bits *b, Tmp *tmp, FILE *f)
 {
@@ -25,18 +27,51 @@ dumpts(Bits *b, Tmp *tmp, FILE *f)
 static void
 data(Dat *d)
 {
+	if (d->type == DEnd) {
+		puts("/* end data */\n");
+		freeall();
+	}
 	emitdat(d, stdout);
 }
 
+static void
+func(Fn *fn)
+{
+	int n;
+
+	if (debug['P']) {
+		fprintf(stderr, "\n> After parsing:\n");
+		printfn(fn, stderr);
+	}
+	isel(fn);
+	fillrpo(fn);
+	fillpreds(fn);
+	filllive(fn);
+	fillcost(fn);
+	fillphi(fn);
+	spill(fn);
+	rega(fn);
+	fillrpo(fn);
+	assert(fn->rpo[0] == fn->start);
+	for (n=0;; n++)
+		if (n == fn->nblk-1) {
+			fn->rpo[n]->link = 0;
+			break;
+		} else
+			fn->rpo[n]->link = fn->rpo[n+1];
+	if (!dbg) {
+		emitfn(fn, stdout);
+		puts("/* end function */\n");
+	} else
+		fprintf(stderr, "\n");
+	freeall();
+}
+
 int
 main(int ac, char *av[])
 {
 	char *o, *f;
 	FILE *inf;
-	Fn *fn;
-	int n, dbg;
-
-	dbg = 0;
 
 	if (ac > 1 && strncmp(av[1], "-d", 2) == 0) {
 		if (av[1][2] == 0) {
@@ -66,33 +101,8 @@ main(int ac, char *av[])
 		}
 	}
 
-	fn = parse(inf, data);
+	parse(inf, data, func);
 	fclose(inf);
-	if (debug['P']) {
-		fprintf(stderr, "\n> After parsing:\n");
-		printfn(fn, stderr);
-	}
-	isel(fn);
-	fillrpo(fn);
-	fillpreds(fn);
-	filllive(fn);
-	fillcost(fn);
-	fillphi(fn);
-	spill(fn);
-	rega(fn);
-	fillrpo(fn);
-	assert(fn->rpo[0] == fn->start);
-	for (n=0;; n++)
-		if (n == fn->nblk-1) {
-			fn->rpo[n]->link = 0;
-			break;
-		} else
-			fn->rpo[n]->link = fn->rpo[n+1];
-	if (!dbg)
-		emitfn(fn, stdout);
-	else
-		fprintf(stderr, "\n");
-	freeall();
 	exit(0);
 
 Usage:
diff --git a/lisc/parse.c b/lisc/parse.c
@@ -778,12 +778,9 @@ parsedat(void cb(Dat *))
 	cb(&d);
 }
 
-Fn *
-parse(FILE *f, void data(Dat *))
+void
+parse(FILE *f, void data(Dat *), void func(Fn *))
 {
-	Fn *fn;
-
-	fn = 0;
 	inf = f;
 	lnum = 1;
 	thead = TXXX;
@@ -791,12 +788,7 @@ parse(FILE *f, void data(Dat *))
 	for (;;)
 		switch (nextnl()) {
 		case TFunc:
-			if (fn)
-				/* todo, support multiple
-				 * functions per file
-				 */
-				diag("too many functions");
-			fn = parsefn();
+			func(parsefn());
 			break;
 		case TType:
 			parsetyp();
@@ -805,7 +797,7 @@ parse(FILE *f, void data(Dat *))
 			parsedat(data);
 			break;
 		case TEOF:
-			return fn;
+			return;
 		default:
 			err("top-level definition expected");
 			break;