Miscellaneous cleanups:

* Convert post to pre-increment for for loops
  * Use generic programming more
  * Use new Value::cast* instructions
  * Use new Module, Method, & BasicBlock forwarding methods
  * Use new facilities in STLExtras.h
  * Use new Instruction::isPHINode() method


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96 91177308-0d34-0410-b5e6-96231b3b80d8

test/sccptest.ll

@@ -0,0 +1,36 @@
+implementation
+
+int "test function"(int %i0, int %j0)
+	%i1 = int 1
+	%j1 = int 1
+	%k1 = int 0
+begin
+BB1:
+	br label %BB2
+BB2:
+	%j2 = phi int [%j4, %BB7], [%j1, %BB1]
+	%k2 = phi int [%k4, %BB7], [%k1, %BB1]
+	%kcond = setlt int %k2, 100
+	br bool %kcond, label %BB3, label %BB4
+
+BB3:
+	%jcond = setlt int %j2, 20
+	br bool %jcond, label %BB5, label %BB6
+
+BB4:
+	ret int %j2
+
+BB5:
+	%k3 = add int %k2, 1
+	br label %BB7
+
+BB6:
+	%k5 = add int %k2, 1
+	br label %BB7
+
+BB7:
+	%j4 = phi int [%i1, %BB5], [%k2, %BB6]
+	%k4 = phi int [%k3, %BB5], [%k5, %BB6]
+	br label %BB2
+end
+