Optimize iszero(sub(x, y)) to eq(x, y).

2023-10-03 13:03:40 +00:00 · 2020-12-22 15:11:48 +01:00
parent 6bcae84610
commit d46da8e53c
3 changed files with 44 additions and 0 deletions
@@ -0,0 +1,16 @@
+{
+    let a := calldataload(0)
+    let b := calldataload(0x20)
+    let x := sub(a, b)
+    if gt(x, 0) {
+        sstore(0, 1)
+    }
+}
+// ----
+// step: expressionSimplifier
+//
+// {
+//     let _1 := 0
+//     let a := calldataload(_1)
+//     if iszero(eq(a, calldataload(0x20))) { sstore(_1, 1) }
+// }