Add test to verify new pass APIs and loop-vectorizer.

test/loopvectorize.c

@@ -0,0 +1,44 @@
+void ex1(float *A, float* B, float K, int start, int end) {
+    for (int i = start; i < end; ++i)
+        A[i] *= B[i] + K;
+}
+
+void ex2(float *A, float* B, float K, int n) {
+    for (int i = 0; i < n; ++i)
+        A[i] *= B[i] + K;
+}
+
+int ex3(int *A, int *B, int n) {
+    unsigned sum = 0;
+    for (int i = 0; i < n; ++i)
+        sum += A[i] + 5;
+    return sum;
+}
+
+void ex4(float *A, float* B, float K, int n) {
+    for (int i = 0; i < n; ++i)
+        A[i] = i;
+}
+
+int ex5(int *A, int *B, int n) {
+    unsigned sum = 0;
+    for (int i = 0; i < n; ++i)
+        if (A[i] > B[i])
+            sum += A[i] + 5;
+    return sum;
+}
+
+void ex6(int *A, int *B, int n) {
+    for (int i = n; i > 0; --i)
+        A[i] +=1;
+}
+
+void ex7(int *A, int *B, int n, int k) {
+    for (int i = 0; i < n; ++i)
+        A[i*7] += B[i*k];
+}
+
+void ex8(int *A, char *B, int n, int k) {
+    for (int i = 0; i < n; ++i)
+        A[i] += 4 * B[i];
+}