new layout, put LICENSE in root

1 files changed, 140 insertions, 0 deletions

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..c1664be
--- /dev/null
+++ b/main.c
@@ -0,0 +1,140 @@
+#include "all.h"
+#include "config.h"
+#include <ctype.h>
+#include <getopt.h>
+
+char debug['Z'+1] = {
+	['P'] = 0, /* parsing */
+	['A'] = 0, /* abi lowering */
+	['I'] = 0, /* instruction selection */
+	['L'] = 0, /* liveness */
+	['M'] = 0, /* memory optimization */
+	['N'] = 0, /* ssa construction */
+	['C'] = 0, /* copy elimination */
+	['S'] = 0, /* spilling */
+	['R'] = 0, /* reg. allocation */
+};
+
+static FILE *outf;
+static int dbg;
+
+static void
+data(Dat *d)
+{
+	if (dbg)
+		return;
+	if (d->type == DEnd) {
+		fputs("/* end data */\n\n", outf);
+		freeall();
+	}
+	emitdat(d, outf);
+}
+
+static void
+func(Fn *fn)
+{
+	int n;
+
+	if (dbg)
+		fprintf(stderr, "**** Function %s ****", fn->name);
+	if (debug['P']) {
+		fprintf(stderr, "\n> After parsing:\n");
+		printfn(fn, stderr);
+	}
+	fillrpo(fn);
+	fillpreds(fn);
+	filluse(fn);
+	memopt(fn);
+	ssa(fn);
+	filluse(fn);
+	copy(fn);
+	filluse(fn);
+	isel(fn);
+	filllive(fn);
+	fillcost(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, outf);
+		fprintf(outf, "/* end function %s */\n\n", fn->name);
+	} else
+		fprintf(stderr, "\n");
+	freeall();
+}
+
+int
+main(int ac, char *av[])
+{
+	FILE *inf;
+	char *f;
+	int c, asm;
+
+	asm = Defaultasm;
+	outf = stdout;
+	while ((c = getopt(ac, av, "d:o:G:")) != -1)
+		switch (c) {
+		case 'd':
+			for (; *optarg; optarg++)
+				if (isalpha(*optarg)) {
+					debug[toupper(*optarg)] = 1;
+					dbg = 1;
+				}
+			break;
+		case 'o':
+			if (strcmp(optarg, "-") != 0)
+				outf = fopen(optarg, "w");
+			break;
+		case 'G':
+			if (strcmp(optarg, "e") == 0)
+				asm = Gaself;
+			else if (strcmp(optarg, "m") == 0)
+				asm = Gasmacho;
+			else {
+				fprintf(stderr, "unknown gas flavor '%s'\n", optarg);
+				exit(1);
+			}
+			break;
+		default:
+			fprintf(stderr, "usage: %s [-d <flags>] [-o out] {file.ssa, -}\n", av[0]);
+			exit(1);
+		}
+
+	switch (asm) {
+	case Gaself:
+		locprefix = ".L";
+		symprefix = "";
+		break;
+	case Gasmacho:
+		locprefix = "L";
+		symprefix = "_";
+		break;
+	}
+
+	do {
+		f = av[optind];
+		if (!f || strcmp(f, "-") == 0) {
+			inf = stdin;
+			f = "-";
+		} else {
+			inf = fopen(f, "r");
+			if (!inf) {
+				fprintf(stderr, "cannot open '%s'\n", f);
+				exit(1);
+			}
+		}
+		parse(inf, f, data, func);
+	} while (++optind < ac);
+
+	if (!dbg)
+		emitfin(outf);
+
+	exit(0);
+}