From 87881df4376db39e90b1b52230d4924f6b99523b Mon Sep 17 00:00:00 2001
From: tutugordillo <tutugordillo@gmail.com>
Date: Fri, 22 Nov 2024 11:48:33 +0100
Subject: [PATCH] function yul

---
 examples/function/function.yul | 73 ++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 examples/function/function.yul

diff --git a/examples/function/function.yul b/examples/function/function.yul
new file mode 100644
index 00000000..90c4b380
--- /dev/null
+++ b/examples/function/function.yul
@@ -0,0 +1,73 @@
+{
+    function f(a, b) -> r {
+        let x := add(a,b)
+        r := sub(x,a)
+    }
+    function g() {
+        sstore(0x01, 0x0101)
+    }
+    function h(x) {
+        h(f(x, 0))
+        g()
+    }
+    function i() -> v, w {
+        v := 0x0202
+        w := 0x0303
+    }
+    let x, y := i()
+    h(x)
+    h(y)
+}
+// ----
+// digraph CFG {
+// nodesep=0.7;
+// node[shape=box];
+//
+// Entry [label="Entry"];
+// Entry -> Block0;
+// Block0 [label="\
+// i: [ RET[i] ] => [ TMP[i, 0] TMP[i, 1] ]\l\
+// Assignment(x, y): [ TMP[i, 0] TMP[i, 1] ] => [ x y ]\l\
+// h: [ x ] => [ ]\l\
+// "];
+// Block0Exit [label="Terminated"];
+// Block0 -> Block0Exit;
+//
+// FunctionEntry_f_1 [label="function f(a, b) -> r"];
+// FunctionEntry_f_1 -> Block1;
+// Block1 [label="\
+// add: [ b a ] => [ TMP[add, 0] ]\l\
+// Assignment(x): [ TMP[add, 0] ] => [ x ]\l\
+// sub: [ a x ] => [ TMP[sub, 0] ]\l\
+// Assignment(r): [ TMP[sub, 0] ] => [ r ]\l\
+// "];
+// Block1Exit [label="FunctionReturn[f]"];
+// Block1 -> Block1Exit;
+//
+// FunctionEntry_g_2 [label="function g()"];
+// FunctionEntry_g_2 -> Block2;
+// Block2 [label="\
+// sstore: [ 0x0101 0x01 ] => [ ]\l\
+// "];
+// Block2Exit [label="FunctionReturn[g]"];
+// Block2 -> Block2Exit;
+//
+// FunctionEntry_h_3 [label="function h(x)"];
+// FunctionEntry_h_3 -> Block3;
+// Block3 [label="\
+// f: [ RET[f] 0x00 x ] => [ TMP[f, 0] ]\l\
+// h: [ TMP[f, 0] ] => [ ]\l\
+// "];
+// Block3Exit [label="Terminated"];
+// Block3 -> Block3Exit;
+//
+// FunctionEntry_i_4 [label="function i() -> v, w"];
+// FunctionEntry_i_4 -> Block4;
+// Block4 [label="\
+// Assignment(v): [ 0x0202 ] => [ v ]\l\
+// Assignment(w): [ 0x0303 ] => [ w ]\l\
+// "];
+// Block4Exit [label="FunctionReturn[i]"];
+// Block4 -> Block4Exit;
+//
+// }