shithub: scc

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Move reguse update to moveto()

This function is going to be used for all the register transfer,
so it is the best place where update the registers.

--- a/cc2/cgen.c

+++ b/cc2/cgen.c

@@ -102,10 +102,8 @@

 		for (bp = reg8; (c = *bp); ++bp) {

 			if (reguse[c])

 				continue;

-			reguse[c] = np;

 			return c;

 		}

-		/* TODO: Move variable to stack using PUSH/POP */

 		break;

 	case 2:

 		for (bp = reg16; (c = *bp); ++bp) {

@@ -113,10 +111,8 @@

 			if (reguse[u] || reguse[l])

 				continue;

-			reguse[u] = reguse[l] = np;

 			return c;

 		}

-		/* TODO: Move variable to stack using PUSH/POP */

 		break;

 	}

 	abort();

@@ -140,6 +136,7 @@

 		default:

 			abort();

 		}

+		reguse[reg] = np;

 		break;

 	case 2:

 		switch (op) {

@@ -153,6 +150,7 @@

 		default:

 			abort();

 		}

+		reguse[upper[reg]] = reguse[lower[reg]] = np;

 		break;

 	default:

 		abort();