[dev.ssa] cmd/compile/ssa: fix unit tests

Fix out of bounds array panic due to CL 11238.

Change-Id: Id8a46f1ee20cb1f46775d0c04cc4944d729dfceb
Reviewed-on: https://go-review.googlesource.com/11540Reviewed-by: Keith Randall <khr@golang.org>

src/cmd/compile/internal/ssa/check.go

@@ -105,6 +105,9 @@ func checkFunc(f *Func) {
 			}
 
 			if v.Op == OpAddr {
+				if len(v.Args) == 0 {
+					f.Fatalf("no args for OpAddr %s", v.LongString())
+				}
 				if v.Args[0].Op != OpSP && v.Args[0].Op != OpSB {
 					f.Fatalf("bad arg to OpAddr %v", v)
 				}

src/cmd/compile/internal/ssa/deadstore_test.go

@@ -14,9 +14,10 @@ func TestDeadStore(t *testing.T) {
 	fun := Fun(c, "entry",
 		Bloc("entry",
 			Valu("start", OpArg, TypeMem, 0, ".mem"),
+			Valu("sb", OpSB, TypeInvalid, 0, nil),
 			Valu("v", OpConst, TypeBool, 0, true),
-			Valu("addr1", OpAddr, ptrType, 0, nil),
-			Valu("addr2", OpAddr, ptrType, 0, nil),
+			Valu("addr1", OpAddr, ptrType, 0, nil, "sb"),
+			Valu("addr2", OpAddr, ptrType, 0, nil, "sb"),
 			Valu("store1", OpStore, TypeMem, 0, nil, "addr1", "v", "start"),
 			Valu("store2", OpStore, TypeMem, 0, nil, "addr2", "v", "store1"),
 			Valu("store3", OpStore, TypeMem, 0, nil, "addr1", "v", "store2"),
@@ -40,8 +41,9 @@ func TestDeadStorePhi(t *testing.T) {
 	fun := Fun(c, "entry",
 		Bloc("entry",
 			Valu("start", OpArg, TypeMem, 0, ".mem"),
+			Valu("sb", OpSB, TypeInvalid, 0, nil),
 			Valu("v", OpConst, TypeBool, 0, true),
-			Valu("addr", OpAddr, ptrType, 0, nil),
+			Valu("addr", OpAddr, ptrType, 0, nil, "sb"),
 			Goto("loop")),
 		Bloc("loop",
 			Valu("phi", OpPhi, TypeMem, 0, nil, "start", "store"),
@@ -66,9 +68,10 @@ func TestDeadStoreTypes(t *testing.T) {
 	fun := Fun(c, "entry",
 		Bloc("entry",
 			Valu("start", OpArg, TypeMem, 0, ".mem"),
+			Valu("sb", OpSB, TypeInvalid, 0, nil),
 			Valu("v", OpConst, TypeBool, 0, true),
-			Valu("addr1", OpAddr, t1, 0, nil),
-			Valu("addr2", OpAddr, t2, 0, nil),
+			Valu("addr1", OpAddr, t1, 0, nil, "sb"),
+			Valu("addr2", OpAddr, t2, 0, nil, "sb"),
 			Valu("store1", OpStore, TypeMem, 0, nil, "addr1", "v", "start"),
 			Valu("store2", OpStore, TypeMem, 0, nil, "addr2", "v", "store1"),
 			Goto("exit")),