Constant Propagation Transformation: Difference between revisions

Constant Propagation Transformation (view source)

625 bytes added , 13 February

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 ConstPropagation is typically used to generate a clearer code, to reduce complexity for dependency analysis and increase potential for better optimization possibilities.
 ===Example===
-The following code tests ConstPropagation applied to main function. In the given example, variables a, b and c are known. They are propagated to the rest of the body of
+{| class="wikitable"
+! Input Code
+!Result
+|-
+|The following code tests ConstPropagation applied to main function.
+In the given example, variables a, b and c are known.
+They are propagated to the rest of the body of main.
+|The following code is the generated code after the transformation has been applied.
+|-
+|<syntaxhighlight lang="c">
+#pragma EMX_TRANSFORMATION ConstPropagation
+int main(void) {
+    int a = 2;
+    int b = a;
+    int c, d;
+    c = 2 + 2;
+    d = b + c;
+    return 0;
+}
+</syntaxhighlight>
+|<pre>int main(void) {
+int a = 2;
+int b = a;
+int c;
+int d;
+c = 4;
+d = 6;
+return 0;
+}
+</pre>
+|-
+|
+|
+|}The following code tests ConstPropagation applied to main function. In the given example, variables a, b and c are known. They are propagated to the rest of the body of
 main. <syntaxhighlight lang="c">