From 53d1c39119e590f17fc04ccd45d0789128d03597 Mon Sep 17 00:00:00 2001
From: metagn <metagngn@gmail.com>
Date: Fri, 1 Nov 2024 19:53:06 +0300
Subject: [PATCH] fix computed goto

---
 compiler/cbuilderstmts.nim | 15 ++++++++++-----
 compiler/ccgstmts.nim      |  4 ++--
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/compiler/cbuilderstmts.nim b/compiler/cbuilderstmts.nim
index a4014628ad91..2099d45d1969 100644
--- a/compiler/cbuilderstmts.nim
+++ b/compiler/cbuilderstmts.nim
@@ -257,24 +257,29 @@ proc addLabel(builder: var Builder, name: TLabel) =
 proc addReturn(builder: var Builder) =
   builder.add("return;\n")
 
-proc addReturn(builder: var Builder, value: string) =
+proc addReturn(builder: var Builder, value: Snippet) =
   builder.add("return ")
   builder.add(value)
   builder.add(";\n")
 
-template addGoto(builder: var Builder, label: TLabel) =
+proc addGoto(builder: var Builder, label: TLabel) =
   builder.add("goto ")
   builder.add(label)
   builder.add(";\n")
 
-template addBreak(builder: var Builder) =
+proc addComputedGoto(builder: var Builder, value: Snippet) =
+  builder.add("goto *")
+  builder.add(value)
+  builder.add(";\n")
+
+proc addBreak(builder: var Builder) =
   builder.add("break;")
 
-template addIncr(builder: var Builder, val: Snippet) =
+proc addIncr(builder: var Builder, val: Snippet) =
   builder.add(val)
   builder.add("++;\n")
 
-template addDecr(builder: var Builder, val: Snippet) =
+proc addDecr(builder: var Builder, val: Snippet) =
   builder.add(val)
   builder.add("--;\n")
 
diff --git a/compiler/ccgstmts.nim b/compiler/ccgstmts.nim
index a384b6b0313b..054770459781 100644
--- a/compiler/ccgstmts.nim
+++ b/compiler/ccgstmts.nim
@@ -644,7 +644,7 @@ proc genComputedGoto(p: BProc; n: PNode) =
   var a: TLoc = initLocExpr(p, caseStmt[0])
   let ra = a.rdLoc
   # first goto:
-  p.s(cpsStmts).addGoto(cDeref(subscript(tmp, ra)))
+  p.s(cpsStmts).addComputedGoto(subscript(tmp, ra))
 
   for i in 1..<caseStmt.len:
     var scope: ScopeBuilder
@@ -682,7 +682,7 @@ proc genComputedGoto(p: BProc; n: PNode) =
 
     var a: TLoc = initLocExpr(p, caseStmt[0])
     let ra = a.rdLoc
-    p.s(cpsStmts).addGoto(cDeref(subscript(tmp, ra)))
+    p.s(cpsStmts).addComputedGoto(subscript(tmp, ra))
     endSimpleBlock(p, scope)
 
   for j in casePos+1..<n.len: