cmd/gc: re-order some OFOO constants. Rename ORRC to ORROTC to be

consistent with OLROT. Delete unused OBAD, OLRC.

R=rsc, dave
CC=golang-dev
https://golang.org/cl/6489082

src/cmd/6g/ggen.c

@@ -758,7 +758,7 @@ divbymul:
 			// need to add numerator accounting for overflow
 			gins(optoas(OADD, nl->type), &n1, &dx);
 			nodconst(&n2, nl->type, 1);
-			gins(optoas(ORRC, nl->type), &n2, &dx);
+			gins(optoas(ORROTC, nl->type), &n2, &dx);
 			nodconst(&n2, nl->type, m.s-1);
 			gins(optoas(ORSH, nl->type), &n2, &dx);
 		} else {

src/cmd/6g/gsubr.c

@@ -1724,23 +1724,23 @@ optoas(int op, Type *t)
 		a = ASARQ;
 		break;
 
-	case CASE(ORRC, TINT8):
-	case CASE(ORRC, TUINT8):
+	case CASE(ORROTC, TINT8):
+	case CASE(ORROTC, TUINT8):
 		a = ARCRB;
 		break;
 
-	case CASE(ORRC, TINT16):
-	case CASE(ORRC, TUINT16):
+	case CASE(ORROTC, TINT16):
+	case CASE(ORROTC, TUINT16):
 		a = ARCRW;
 		break;
 
-	case CASE(ORRC, TINT32):
-	case CASE(ORRC, TUINT32):
+	case CASE(ORROTC, TINT32):
+	case CASE(ORROTC, TUINT32):
 		a = ARCRL;
 		break;
 
-	case CASE(ORRC, TINT64):
-	case CASE(ORRC, TUINT64):
+	case CASE(ORROTC, TINT64):
+	case CASE(ORROTC, TUINT64):
 		a = ARCRQ;
 		break;
 

src/cmd/gc/go.h

@@ -431,7 +431,6 @@ enum
 	OAS2MAPR,	// x, ok = m["foo"]
 	OAS2DOTTYPE,	// x, ok = I.(int)
 	OASOP,	// x += y
-	OBAD,	// unused.
 	OCALL,	// function call, method call or type conversion, possibly preceded by defer or go.
 	OCALLFUNC,	// f()
 	OCALLMETH,	// t.Method()
@@ -479,12 +478,6 @@ enum
 	OMAKECHAN,	// make(chan int)
 	OMAKEMAP,	// make(map[string]int)
 	OMAKESLICE,	// make([]int, 0)
-
-	// TODO: move these to the "for back ends" section, like OLROT.
-	OHMUL, // high-mul. 386/amd64: AMUL/AIMUL for unsigned/signed (OMUL uses AIMUL for both).
-	ORRC, // right rotate-carry. 386/amd64: ARCR.
-	OLRC, // unused.
-
 	OMUL,	// x * y
 	ODIV,	// x / y
 	OMOD,	// x % y
@@ -553,14 +546,18 @@ enum
 	OEFACE,	// itable and data words of an empty-interface value.
 	OITAB,	// itable word of an interface value.
 
-	// for back ends
-	OCMP,	// compare. 386/amd64: ACMP.
-	ODEC,	// decrement. 386/amd64: ADEC.
-	OEXTEND,	// extend. 386/amd64: ACWD/ACDQ/ACQO.
-	OINC,	// increment. 386/amd64: AINC.
-	OREGISTER,	// an arch-specific register.
+	// arch-specific registers
+	OREGISTER,	// a register, such as AX.
 	OINDREG,	// offset plus indirect of a register, such as 8(SP).
-	OLROT,	// rotate left. 386/amd64: AROL.
+
+	// 386/amd64-specific opcodes
+	OCMP,	// compare: ACMP.
+	ODEC,	// decrement: ADEC.
+	OINC,	// increment: AINC.
+	OEXTEND,	// extend: ACWD/ACDQ/ACQO.
+	OHMUL, // high mul: AMUL/AIMUL for unsigned/signed (OMUL uses AIMUL for both).
+	OLROT,	// left rotate: AROL.
+	ORROTC, // right rotate-carry: ARCR.
 
 	OEND,
 };