fix: evaluate all function call arguments before setting registers

2025-02-28 00:27:26 +00:00
parent c31dd9de25
commit 41f76e50e0
1 changed files with 10 additions and 4 deletions
--- a/src/main/wacc/backend/asmGenerator.scala
+++ b/src/main/wacc/backend/asmGenerator.scala
@@ -392,10 +392,16 @@ object asmGenerator {
    var chain = Chain.empty[AsmLine]
    val microWacc.Call(target, args) = call

-    argRegs.zip(args).foldMap { (reg, expr) =>
-      chain ++= evalExprOntoStack(expr)
-      chain += stack.pop(Register(Q64, reg))
-    }
+    argRegs
+      .zip(args)
+      .map { (reg, expr) =>
+        chain ++= evalExprOntoStack(expr)
+        reg
+      }
+      .reverse
+      .foreach { reg =>
+        chain += stack.pop(Register(Q64, reg))
+      }

    args.drop(argRegs.size).foldMap {
      chain ++= evalExprOntoStack(_)