ssa: map range/next

cl/_testrt/makemap/in.go

@@ -4,9 +4,17 @@ func main() {
 	m := make(map[int]string)
 	m[1] = "hello"
 	m[2] = "world"
-	println(m[1], m[2])
+	m[3] = "llgo"
-	v, ok := m[2]
+	println(m[1], m[2], len(m))
-	println(v, ok)
+	for k, v := range m {
-	v2, ok := m[10]
+		println(k, ":", v)
-	println(v2, ok)
+	}
+	s := make(map[string]int, len(m))
+	for k, v := range m {
+		s[v] = k
+	}
+	id, ok := s["llgo"]
+	println("llgo", id, ok)
+	none, ok := s["go"]
+	println("go", none, ok)
 }

cl/_testrt/makemap/out.ll

@@ -16,6 +16,10 @@ source_filename = "main"
 @4 = private unnamed_addr constant [4 x i8] c"main", align 1
 @5 = private unnamed_addr constant [5 x i8] c"hello", align 1
 @6 = private unnamed_addr constant [5 x i8] c"world", align 1
+@7 = private unnamed_addr constant [4 x i8] c"llgo", align 1
+@8 = private unnamed_addr constant [1 x i8] c":", align 1
+@"map[_llgo_string]_llgo_int" = linkonce global ptr null, align 8
+@9 = private unnamed_addr constant [2 x i8] c"go", align 1
 
 define void @main.init() {
 _llgo_0:
@@ -61,59 +65,213 @@ _llgo_0:
   store i64 2, ptr %16, align 4
   %17 = call ptr @"github.com/goplus/llgo/internal/runtime.MapAssign"(ptr %15, ptr %3, ptr %16)
   store %"github.com/goplus/llgo/internal/runtime.String" %14, ptr %17, align 8
-  %18 = load ptr, ptr @"map[_llgo_int]_llgo_string", align 8
+  %18 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
-  %19 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  %19 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %18, i32 0, i32 0
-  store i64 1, ptr %19, align 4
+  store ptr @7, ptr %19, align 8
-  %20 = call ptr @"github.com/goplus/llgo/internal/runtime.MapAccess1"(ptr %18, ptr %3, ptr %19)
+  %20 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %18, i32 0, i32 1
-  %21 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %20, align 8
+  store i64 4, ptr %20, align 4
+  %21 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %18, align 8
   %22 = load ptr, ptr @"map[_llgo_int]_llgo_string", align 8
   %23 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
-  store i64 2, ptr %23, align 4
+  store i64 3, ptr %23, align 4
-  %24 = call ptr @"github.com/goplus/llgo/internal/runtime.MapAccess1"(ptr %22, ptr %3, ptr %23)
+  %24 = call ptr @"github.com/goplus/llgo/internal/runtime.MapAssign"(ptr %22, ptr %3, ptr %23)
-  %25 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %24, align 8
+  store %"github.com/goplus/llgo/internal/runtime.String" %21, ptr %24, align 8
-  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %21)
+  %25 = load ptr, ptr @"map[_llgo_int]_llgo_string", align 8
+  %26 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  store i64 1, ptr %26, align 4
+  %27 = call ptr @"github.com/goplus/llgo/internal/runtime.MapAccess1"(ptr %25, ptr %3, ptr %26)
+  %28 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %27, align 8
+  %29 = load ptr, ptr @"map[_llgo_int]_llgo_string", align 8
+  %30 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  store i64 2, ptr %30, align 4
+  %31 = call ptr @"github.com/goplus/llgo/internal/runtime.MapAccess1"(ptr %29, ptr %3, ptr %30)
+  %32 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %31, align 8
+  %33 = load i64, ptr %3, align 4
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %28)
   call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
-  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %25)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %32)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %33)
   call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
-  %26 = load ptr, ptr @"map[_llgo_int]_llgo_string", align 8
+  %34 = load ptr, ptr @"map[_llgo_int]_llgo_string", align 8
-  %27 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+  %35 = call ptr @"github.com/goplus/llgo/internal/runtime.NewMapIter"(ptr %34, ptr %3)
-  store i64 2, ptr %27, align 4
+  br label %_llgo_1
-  %28 = call { ptr, i1 } @"github.com/goplus/llgo/internal/runtime.MapAccess2"(ptr %26, ptr %3, ptr %27)
+
-  %29 = extractvalue { ptr, i1 } %28, 0
+_llgo_1:                                          ; preds = %_llgo_2, %_llgo_0
-  %30 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %29, align 8
+  %36 = call { i1, ptr, ptr } @"github.com/goplus/llgo/internal/runtime.MapIterNext"(ptr %35)
-  %31 = extractvalue { ptr, i1 } %28, 1
+  %37 = extractvalue { i1, ptr, ptr } %36, 0
-  %32 = alloca { %"github.com/goplus/llgo/internal/runtime.String", i1 }, align 8
+  br i1 %37, label %_llgo_7, label %_llgo_8
-  %33 = getelementptr inbounds { %"github.com/goplus/llgo/internal/runtime.String", i1 }, ptr %32, i32 0, i32 0
+
-  store %"github.com/goplus/llgo/internal/runtime.String" %30, ptr %33, align 8
+_llgo_2:                                          ; preds = %_llgo_9
-  %34 = getelementptr inbounds { %"github.com/goplus/llgo/internal/runtime.String", i1 }, ptr %32, i32 0, i32 1
+  %38 = extractvalue { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" } %110, 1
-  store i1 %31, ptr %34, align 1
+  %39 = extractvalue { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" } %110, 2
-  %35 = load { %"github.com/goplus/llgo/internal/runtime.String", i1 }, ptr %32, align 8
+  %40 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
-  %36 = extractvalue { %"github.com/goplus/llgo/internal/runtime.String", i1 } %35, 0
+  %41 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %40, i32 0, i32 0
-  %37 = extractvalue { %"github.com/goplus/llgo/internal/runtime.String", i1 } %35, 1
+  store ptr @8, ptr %41, align 8
-  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %36)
+  %42 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %40, i32 0, i32 1
+  store i64 1, ptr %42, align 4
+  %43 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %40, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %38)
   call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
-  call void @"github.com/goplus/llgo/internal/runtime.PrintBool"(i1 %37)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %43)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %39)
   call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
-  %38 = load ptr, ptr @"map[_llgo_int]_llgo_string", align 8
+  br label %_llgo_1
-  %39 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 8)
+
-  store i64 10, ptr %39, align 4
+_llgo_3:                                          ; preds = %_llgo_9
-  %40 = call { ptr, i1 } @"github.com/goplus/llgo/internal/runtime.MapAccess2"(ptr %38, ptr %3, ptr %39)
+  %44 = load i64, ptr %3, align 4
-  %41 = extractvalue { ptr, i1 } %40, 0
+  %45 = load ptr, ptr @"map[_llgo_string]_llgo_int", align 8
-  %42 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %41, align 8
+  %46 = call ptr @"github.com/goplus/llgo/internal/runtime.MakeMap"(ptr %45, i64 %44)
-  %43 = extractvalue { ptr, i1 } %40, 1
+  %47 = load ptr, ptr @"map[_llgo_int]_llgo_string", align 8
-  %44 = alloca { %"github.com/goplus/llgo/internal/runtime.String", i1 }, align 8
+  %48 = call ptr @"github.com/goplus/llgo/internal/runtime.NewMapIter"(ptr %47, ptr %3)
-  %45 = getelementptr inbounds { %"github.com/goplus/llgo/internal/runtime.String", i1 }, ptr %44, i32 0, i32 0
+  br label %_llgo_4
-  store %"github.com/goplus/llgo/internal/runtime.String" %42, ptr %45, align 8
+
-  %46 = getelementptr inbounds { %"github.com/goplus/llgo/internal/runtime.String", i1 }, ptr %44, i32 0, i32 1
+_llgo_4:                                          ; preds = %_llgo_5, %_llgo_3
-  store i1 %43, ptr %46, align 1
+  %49 = call { i1, ptr, ptr } @"github.com/goplus/llgo/internal/runtime.MapIterNext"(ptr %48)
-  %47 = load { %"github.com/goplus/llgo/internal/runtime.String", i1 }, ptr %44, align 8
+  %50 = extractvalue { i1, ptr, ptr } %49, 0
-  %48 = extractvalue { %"github.com/goplus/llgo/internal/runtime.String", i1 } %47, 0
+  br i1 %50, label %_llgo_10, label %_llgo_11
-  %49 = extractvalue { %"github.com/goplus/llgo/internal/runtime.String", i1 } %47, 1
+
-  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %48)
+_llgo_5:                                          ; preds = %_llgo_12
+  %51 = extractvalue { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" } %126, 1
+  %52 = extractvalue { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" } %126, 2
+  %53 = load ptr, ptr @"map[_llgo_string]_llgo_int", align 8
+  %54 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 16)
+  store %"github.com/goplus/llgo/internal/runtime.String" %52, ptr %54, align 8
+  %55 = call ptr @"github.com/goplus/llgo/internal/runtime.MapAssign"(ptr %53, ptr %46, ptr %54)
+  store i64 %51, ptr %55, align 4
+  br label %_llgo_4
+
+_llgo_6:                                          ; preds = %_llgo_12
+  %56 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %57 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %56, i32 0, i32 0
+  store ptr @7, ptr %57, align 8
+  %58 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %56, i32 0, i32 1
+  store i64 4, ptr %58, align 4
+  %59 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %56, align 8
+  %60 = load ptr, ptr @"map[_llgo_string]_llgo_int", align 8
+  %61 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 16)
+  store %"github.com/goplus/llgo/internal/runtime.String" %59, ptr %61, align 8
+  %62 = call { ptr, i1 } @"github.com/goplus/llgo/internal/runtime.MapAccess2"(ptr %60, ptr %46, ptr %61)
+  %63 = extractvalue { ptr, i1 } %62, 0
+  %64 = load i64, ptr %63, align 4
+  %65 = extractvalue { ptr, i1 } %62, 1
+  %66 = alloca { i64, i1 }, align 8
+  %67 = getelementptr inbounds { i64, i1 }, ptr %66, i32 0, i32 0
+  store i64 %64, ptr %67, align 4
+  %68 = getelementptr inbounds { i64, i1 }, ptr %66, i32 0, i32 1
+  store i1 %65, ptr %68, align 1
+  %69 = load { i64, i1 }, ptr %66, align 4
+  %70 = extractvalue { i64, i1 } %69, 0
+  %71 = extractvalue { i64, i1 } %69, 1
+  %72 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %73 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %72, i32 0, i32 0
+  store ptr @7, ptr %73, align 8
+  %74 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %72, i32 0, i32 1
+  store i64 4, ptr %74, align 4
+  %75 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %72, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %75)
   call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
-  call void @"github.com/goplus/llgo/internal/runtime.PrintBool"(i1 %49)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %70)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintBool"(i1 %71)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
+  %76 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %77 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %76, i32 0, i32 0
+  store ptr @9, ptr %77, align 8
+  %78 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %76, i32 0, i32 1
+  store i64 2, ptr %78, align 4
+  %79 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %76, align 8
+  %80 = load ptr, ptr @"map[_llgo_string]_llgo_int", align 8
+  %81 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 16)
+  store %"github.com/goplus/llgo/internal/runtime.String" %79, ptr %81, align 8
+  %82 = call { ptr, i1 } @"github.com/goplus/llgo/internal/runtime.MapAccess2"(ptr %80, ptr %46, ptr %81)
+  %83 = extractvalue { ptr, i1 } %82, 0
+  %84 = load i64, ptr %83, align 4
+  %85 = extractvalue { ptr, i1 } %82, 1
+  %86 = alloca { i64, i1 }, align 8
+  %87 = getelementptr inbounds { i64, i1 }, ptr %86, i32 0, i32 0
+  store i64 %84, ptr %87, align 4
+  %88 = getelementptr inbounds { i64, i1 }, ptr %86, i32 0, i32 1
+  store i1 %85, ptr %88, align 1
+  %89 = load { i64, i1 }, ptr %86, align 4
+  %90 = extractvalue { i64, i1 } %89, 0
+  %91 = extractvalue { i64, i1 } %89, 1
+  %92 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %93 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %92, i32 0, i32 0
+  store ptr @9, ptr %93, align 8
+  %94 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %92, i32 0, i32 1
+  store i64 2, ptr %94, align 4
+  %95 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %92, align 8
+  call void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com/goplus/llgo/internal/runtime.String" %95)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %90)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 32)
+  call void @"github.com/goplus/llgo/internal/runtime.PrintBool"(i1 %91)
   call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
   ret i32 0
+
+_llgo_7:                                          ; preds = %_llgo_1
+  %96 = extractvalue { i1, ptr, ptr } %36, 1
+  %97 = extractvalue { i1, ptr, ptr } %36, 2
+  %98 = load i64, ptr %96, align 4
+  %99 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %97, align 8
+  %100 = alloca { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, align 8
+  %101 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %100, i32 0, i32 0
+  store i1 true, ptr %101, align 1
+  %102 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %100, i32 0, i32 1
+  store i64 %98, ptr %102, align 4
+  %103 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %100, i32 0, i32 2
+  store %"github.com/goplus/llgo/internal/runtime.String" %99, ptr %103, align 8
+  %104 = load { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %100, align 8
+  br label %_llgo_9
+
+_llgo_8:                                          ; preds = %_llgo_1
+  %105 = alloca { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, align 8
+  %106 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %105, i32 0, i32 0
+  store i1 false, ptr %106, align 1
+  %107 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %105, i32 0, i32 1
+  store i64 0, ptr %107, align 4
+  %108 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %105, i32 0, i32 2
+  store %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, ptr %108, align 8
+  %109 = load { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %105, align 8
+  br label %_llgo_9
+
+_llgo_9:                                          ; preds = %_llgo_8, %_llgo_7
+  %110 = phi { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" } [ %104, %_llgo_7 ], [ %109, %_llgo_8 ]
+  %111 = extractvalue { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" } %110, 0
+  br i1 %111, label %_llgo_2, label %_llgo_3
+
+_llgo_10:                                         ; preds = %_llgo_4
+  %112 = extractvalue { i1, ptr, ptr } %49, 1
+  %113 = extractvalue { i1, ptr, ptr } %49, 2
+  %114 = load i64, ptr %112, align 4
+  %115 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %113, align 8
+  %116 = alloca { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, align 8
+  %117 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %116, i32 0, i32 0
+  store i1 true, ptr %117, align 1
+  %118 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %116, i32 0, i32 1
+  store i64 %114, ptr %118, align 4
+  %119 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %116, i32 0, i32 2
+  store %"github.com/goplus/llgo/internal/runtime.String" %115, ptr %119, align 8
+  %120 = load { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %116, align 8
+  br label %_llgo_12
+
+_llgo_11:                                         ; preds = %_llgo_4
+  %121 = alloca { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, align 8
+  %122 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %121, i32 0, i32 0
+  store i1 false, ptr %122, align 1
+  %123 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %121, i32 0, i32 1
+  store i64 0, ptr %123, align 4
+  %124 = getelementptr inbounds { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %121, i32 0, i32 2
+  store %"github.com/goplus/llgo/internal/runtime.String" zeroinitializer, ptr %124, align 8
+  %125 = load { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" }, ptr %121, align 8
+  br label %_llgo_12
+
+_llgo_12:                                         ; preds = %_llgo_11, %_llgo_10
+  %126 = phi { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" } [ %120, %_llgo_10 ], [ %125, %_llgo_11 ]
+  %127 = extractvalue { i1, i64, %"github.com/goplus/llgo/internal/runtime.String" } %126, 0
+  br i1 %127, label %_llgo_5, label %_llgo_6
 }
 
 declare void @"github.com/goplus/llgo/internal/runtime.init"()
@@ -215,6 +373,101 @@ _llgo_1:                                          ; preds = %_llgo_0
   br label %_llgo_2
 
 _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  %63 = load ptr, ptr @"map[_llgo_string]_llgo_int", align 8
+  %64 = icmp eq ptr %63, null
+  br i1 %64, label %_llgo_3, label %_llgo_4
+
+_llgo_3:                                          ; preds = %_llgo_2
+  %65 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 24)
+  %66 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 2)
+  %67 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %68 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %67, i32 0, i32 0
+  store ptr @0, ptr %68, align 8
+  %69 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %67, i32 0, i32 1
+  store i64 7, ptr %69, align 4
+  %70 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %67, align 8
+  %71 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %72 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %71, i32 0, i32 0
+  store ptr null, ptr %72, align 8
+  %73 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %71, i32 0, i32 1
+  store i64 0, ptr %73, align 4
+  %74 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %71, align 8
+  %75 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 8)
+  %76 = call ptr @"github.com/goplus/llgo/internal/runtime.ArrayOf"(i64 8, ptr %75)
+  %77 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %70, ptr %76, i64 0, %"github.com/goplus/llgo/internal/runtime.String" %74, i1 false)
+  %78 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %79 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %78, i32 0, i32 0
+  store ptr @1, ptr %79, align 8
+  %80 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %78, i32 0, i32 1
+  store i64 4, ptr %80, align 4
+  %81 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %78, align 8
+  %82 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %83 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %82, i32 0, i32 0
+  store ptr null, ptr %83, align 8
+  %84 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %82, i32 0, i32 1
+  store i64 0, ptr %84, align 4
+  %85 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %82, align 8
+  %86 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 24)
+  %87 = call ptr @"github.com/goplus/llgo/internal/runtime.ArrayOf"(i64 8, ptr %86)
+  %88 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %81, ptr %87, i64 8, %"github.com/goplus/llgo/internal/runtime.String" %85, i1 false)
+  %89 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %90 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %89, i32 0, i32 0
+  store ptr @2, ptr %90, align 8
+  %91 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %89, i32 0, i32 1
+  store i64 5, ptr %91, align 4
+  %92 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %89, align 8
+  %93 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %94 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %93, i32 0, i32 0
+  store ptr null, ptr %94, align 8
+  %95 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %93, i32 0, i32 1
+  store i64 0, ptr %95, align 4
+  %96 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %93, align 8
+  %97 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 2)
+  %98 = call ptr @"github.com/goplus/llgo/internal/runtime.ArrayOf"(i64 8, ptr %97)
+  %99 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %92, ptr %98, i64 136, %"github.com/goplus/llgo/internal/runtime.String" %96, i1 false)
+  %100 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %101 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %100, i32 0, i32 0
+  store ptr @3, ptr %101, align 8
+  %102 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %100, i32 0, i32 1
+  store i64 8, ptr %102, align 4
+  %103 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %100, align 8
+  %104 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %105 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %104, i32 0, i32 0
+  store ptr null, ptr %105, align 8
+  %106 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %104, i32 0, i32 1
+  store i64 0, ptr %106, align 4
+  %107 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %104, align 8
+  %108 = call ptr @"github.com/goplus/llgo/internal/runtime.Basic"(i64 26)
+  %109 = call %"github.com/goplus/llgo/internal/abi.StructField" @"github.com/goplus/llgo/internal/runtime.StructField"(%"github.com/goplus/llgo/internal/runtime.String" %103, ptr %108, i64 200, %"github.com/goplus/llgo/internal/runtime.String" %107, i1 false)
+  %110 = alloca %"github.com/goplus/llgo/internal/runtime.String", align 8
+  %111 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %110, i32 0, i32 0
+  store ptr @4, ptr %111, align 8
+  %112 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.String", ptr %110, i32 0, i32 1
+  store i64 4, ptr %112, align 4
+  %113 = load %"github.com/goplus/llgo/internal/runtime.String", ptr %110, align 8
+  %114 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocU"(i64 224)
+  %115 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %114, i64 0
+  store %"github.com/goplus/llgo/internal/abi.StructField" %77, ptr %115, align 8
+  %116 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %114, i64 1
+  store %"github.com/goplus/llgo/internal/abi.StructField" %88, ptr %116, align 8
+  %117 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %114, i64 2
+  store %"github.com/goplus/llgo/internal/abi.StructField" %99, ptr %117, align 8
+  %118 = getelementptr %"github.com/goplus/llgo/internal/abi.StructField", ptr %114, i64 3
+  store %"github.com/goplus/llgo/internal/abi.StructField" %109, ptr %118, align 8
+  %119 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
+  %120 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %119, i32 0, i32 0
+  store ptr %114, ptr %120, align 8
+  %121 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %119, i32 0, i32 1
+  store i64 4, ptr %121, align 4
+  %122 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %119, i32 0, i32 2
+  store i64 4, ptr %122, align 4
+  %123 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %119, align 8
+  %124 = call ptr @"github.com/goplus/llgo/internal/runtime.Struct"(%"github.com/goplus/llgo/internal/runtime.String" %113, i64 208, %"github.com/goplus/llgo/internal/runtime.Slice" %123)
+  %125 = call ptr @"github.com/goplus/llgo/internal/runtime.MapOf"(ptr %65, ptr %66, ptr %124, i64 12)
+  store ptr %125, ptr @"map[_llgo_string]_llgo_int", align 8
+  br label %_llgo_4
+
+_llgo_4:                                          ; preds = %_llgo_3, %_llgo_2
   ret void
 }
 
@@ -240,6 +493,12 @@ declare void @"github.com/goplus/llgo/internal/runtime.PrintString"(%"github.com
 
 declare void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8)
 
+declare void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.NewMapIter"(ptr, ptr)
+
+declare { i1, ptr, ptr } @"github.com/goplus/llgo/internal/runtime.MapIterNext"(ptr)
+
 declare { ptr, i1 } @"github.com/goplus/llgo/internal/runtime.MapAccess2"(ptr, ptr, ptr)
 
 declare void @"github.com/goplus/llgo/internal/runtime.PrintBool"(i1)

cl/compile.go

@@ -574,8 +574,12 @@ func (p *context) compileInstrOrValue(b llssa.Builder, iv instrOrValue, asValue
 		x := p.compileValue(b, v.X)
 		ret = b.Range(x)
 	case *ssa.Next:
+		var typ llssa.Type
+		if !v.IsString {
+			typ = p.prog.Type(v.Iter.(*ssa.Range).X.Type(), llssa.InGo)
+		}
 		iter := p.compileValue(b, v.Iter)
-		ret = b.Next(iter, v.IsString)
+		ret = b.Next(typ, iter, v.IsString)
 	case *ssa.ChangeInterface:
 		t := v.Type()
 		x := p.compileValue(b, v.X)

internal/runtime/z_map.go

@@ -57,6 +57,22 @@ func MapAccess2(t *maptype, h *hmap, key unsafe.Pointer) (unsafe.Pointer, bool)
 	return mapaccess2(t, h, key)
 }
 
+func NewMapIter(t *maptype, h *hmap) *hiter {
+	var it hiter
+	mapiterinit(t, h, &it)
+	return &it
+}
+
+func MapIterNext(it *hiter) (ok bool, k unsafe.Pointer, v unsafe.Pointer) {
+	if it.key == nil {
+		return
+	}
+	ok = true
+	k, v = it.key, it.elem
+	mapiternext(it)
+	return
+}
+
 func mapKeyEqual(t *maptype, p, q unsafe.Pointer) bool {
 	if isDirectIface(t.Key) {
 		switch t.Key.Size_ {

ssa/datastruct.go

@@ -548,8 +548,11 @@ func (b Builder) Range(x Expr) Expr {
 	switch x.kind {
 	case vkString:
 		return b.InlineCall(b.Pkg.rtFunc("NewStringIter"), x)
+	case vkMap:
+		typ := b.abiType(x.raw.Type)
+		return b.InlineCall(b.Pkg.rtFunc("NewMapIter"), typ, x)
 	}
-	panic("todo")
+	panic("unsupport range for " + x.raw.Type.String())
 }
 
 // The Next instruction reads and advances the (map or string)
@@ -570,11 +573,41 @@ func (b Builder) Range(x Expr) Expr {
 // Example printed form:
 //
 //	t1 = next t0
-func (b Builder) Next(iter Expr, isString bool) (ret Expr) {
+func (b Builder) Next(typ Type, iter Expr, isString bool) Expr {
 	if isString {
 		return b.InlineCall(b.Pkg.rtFunc("StringIterNext"), iter)
 	}
-	panic("todo")
+	prog := b.Prog
+	ktyp := prog.Type(typ.raw.Type.(*types.Map).Key(), InGo)
+	vtyp := prog.Type(typ.raw.Type.(*types.Map).Elem(), InGo)
+	rets := b.InlineCall(b.Pkg.rtFunc("MapIterNext"), iter)
+	ok := b.impl.CreateExtractValue(rets.impl, 0, "")
+	t := prog.Struct(prog.Bool(), ktyp, vtyp)
+	blks := b.Func.MakeBlocks(3)
+	b.If(Expr{ok, prog.Bool()}, blks[0], blks[1])
+	b.SetBlockEx(blks[2], AtEnd, false)
+	phi := b.Phi(t)
+	phi.AddIncoming(b, blks[:2], func(i int, blk BasicBlock) Expr {
+		b.SetBlockEx(blk, AtEnd, false)
+		if i == 0 {
+			k := b.impl.CreateExtractValue(rets.impl, 1, "")
+			v := b.impl.CreateExtractValue(rets.impl, 2, "")
+			valTrue := aggregateValue(b.impl, t.ll, prog.BoolVal(true).impl,
+				llvm.CreateLoad(b.impl, ktyp.ll, k),
+				llvm.CreateLoad(b.impl, vtyp.ll, v))
+			b.Jump(blks[2])
+			return Expr{valTrue, t}
+		}
+		valFalse := aggregateValue(b.impl, t.ll, prog.BoolVal(false).impl,
+			llvm.ConstNull(ktyp.ll),
+			llvm.ConstNull(vtyp.ll))
+		b.Jump(blks[2])
+		return Expr{valFalse, t}
+	})
+	b.SetBlockEx(blks[2], AtEnd, false)
+	b.blk.last = blks[2].last
+	return phi.Expr
+
 }
 
 // The MakeChan instruction creates a new channel object and yields a