From cffb5e953904cc662e538aaac3e465363b192c2c Mon Sep 17 00:00:00 2001
From: xushiwei <x@goplus.org>
Date: Mon, 6 May 2024 16:40:52 +0800
Subject: [PATCH] closureStub: SetTailCall

---
 cl/_testrt/callback/out.ll | 2 +-
 cl/_testrt/closure/out.ll  | 2 +-
 cl/_testrt/intgen/out.ll   | 2 +-
 ssa/package.go             | 1 +
 4 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/cl/_testrt/callback/out.ll b/cl/_testrt/callback/out.ll
index ae9e2a94..ec2be34b 100644
--- a/cl/_testrt/callback/out.ll
+++ b/cl/_testrt/callback/out.ll
@@ -57,7 +57,7 @@ declare void @"github.com/goplus/llgo/internal/runtime.init"()
 
 define linkonce void @__llgo_stub.main.print(ptr %0, ptr %1) {
 _llgo_0:
-  call void @main.print(ptr %1)
+  tail call void @main.print(ptr %1)
   ret void
 }
 
diff --git a/cl/_testrt/closure/out.ll b/cl/_testrt/closure/out.ll
index e4024527..f3bf7842 100644
--- a/cl/_testrt/closure/out.ll
+++ b/cl/_testrt/closure/out.ll
@@ -56,7 +56,7 @@ _llgo_0:
 
 define linkonce void @"__llgo_stub.main.main$1"(ptr %0, i64 %1, i64 %2) {
 _llgo_0:
-  call void @"main.main$1"(i64 %1, i64 %2)
+  tail call void @"main.main$1"(i64 %1, i64 %2)
   ret void
 }
 
diff --git a/cl/_testrt/intgen/out.ll b/cl/_testrt/intgen/out.ll
index d12316e5..ac5171bf 100644
--- a/cl/_testrt/intgen/out.ll
+++ b/cl/_testrt/intgen/out.ll
@@ -165,7 +165,7 @@ declare i32 @rand()
 
 define linkonce i32 @__llgo_stub.rand(ptr %0) {
 _llgo_0:
-  %1 = call i32 @rand()
+  %1 = tail call i32 @rand()
   ret i32 %1
 }
 
diff --git a/ssa/package.go b/ssa/package.go
index 6065e83a..ff5031a5 100644
--- a/ssa/package.go
+++ b/ssa/package.go
@@ -388,6 +388,7 @@ func (p Package) closureStub(b Builder, t *types.Struct, v Expr) Expr {
 		}
 		b := fn.MakeBody(1)
 		call := b.Call(v, args...)
+		call.impl.SetTailCall(true)
 		switch nret {
 		case 0:
 			b.impl.CreateRetVoid()