New testcases for verifier

llvm-svn: 2763

test/Regression/Verifier/AmbiguousPhi.ll

@@ -0,0 +1,8 @@
+
+
+int "test"(int %i, int %j, bool %c) {
+	br bool %c, label %A, label %A
+A:
+	%a = phi int [%i, %0], [%j, %0]  ; Error, different values from same block!
+	ret int %a
+}

test/Regression/Verifier/PhiGrouping.ll

@@ -0,0 +1,15 @@
+
+
+int "test"(int %i, int %j, bool %c) {
+	br bool %c, label %A, label %B
+A:
+	br label %C
+B:
+	br label %C
+
+C:
+	%a = phi int [%i, %A], [%j, %B]
+	%x = add int %a, 0                 ; Error, PHI's should be grouped!
+	%b = phi int [%i, %A], [%j, %B]
+	ret int %x
+}