Loop Unrolling Transformation: Difference between revisions

Loop Unrolling Transformation (view source)

383 bytes removed , 1 March

2,557

edits

@@ Line 63: / Line 63: @@
 |-
 |<syntaxhighlight lang="c">
-/* The following code tests loop unroll transformation applied to a for loop: */
+#pragma EMX_TRANSFORMATION LoopUnroll { "unrollfactor": 3 }
+for (int i = 1; i < n; i++) {
+	printf("%d\n", i);
+}
-int main(void) {
-    int i;
-    int a[4];
-    #pragma EMX_TRANSFORMATION LoopUnroll { ”unrollfactor”: 4}
-    for (i = 0; i < 4; i++) {
-        a[i] = i;
-    }
-    return 0;
-}
 </syntaxhighlight>
 |<syntaxhighlight lang="c">
-/* The generated code includes all four iterations of the loop transformed into four separate statements.
+for (i = 1; (i + 2) < n; i = i + 3) {
- * The loop unrolling is full and the loop is removed.
+	printf("%d\n", i);
- */
+	printf("%d\n", i + 1);
+	printf("%d\n", i + 2);
+}
-int main(void) {
+for (; i < n; i = i + 1) {
-    int i;
+	printf("%d\n", i);
-    int a[4];
-    i = 0;
-    {
-        a[i] = i;
-    } {
-        a[i + 1 * 1] = i + 1 * 1;
-    } {
-        a[i + 1 * 2] = i + 1 * 2;
-    } {
-        a[i + 1 * 3] = i + 1 * 3;
-    }
-    return 0;
 }
 </syntaxhighlight>
 |}