test/codegen: port maps test to codegen

And delete them from asm_test.

Change-Id: I3cf0934706a640136cb0f646509174f8c1bf3363
Reviewed-on: https://go-review.googlesource.com/101395
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Giovanni Bajo <rasky@develer.com>

src/cmd/compile/internal/gc/asm_test.go

@@ -279,41 +279,6 @@ var linuxAMD64Tests = []*asmTest{
 		`,
 		pos: []string{"\tSHLQ\t\\$5,", "\tLEAQ\t\\(.*\\)\\(.*\\*2\\),"},
 	},
-	{
-		fn: `
-		func f33(m map[int]int) int {
-			return m[5]
-		}
-		`,
-		pos: []string{"\tMOVQ\t[$]5,"},
-	},
-	// Direct use of constants in fast map access calls. Issue 19015.
-	{
-		fn: `
-		func f34(m map[int]int) bool {
-			_, ok := m[5]
-			return ok
-		}
-		`,
-		pos: []string{"\tMOVQ\t[$]5,"},
-	},
-	{
-		fn: `
-		func f35(m map[string]int) int {
-			return m["abc"]
-		}
-		`,
-		pos: []string{"\"abc\""},
-	},
-	{
-		fn: `
-		func f36(m map[string]int) bool {
-			_, ok := m["abc"]
-			return ok
-		}
-		`,
-		pos: []string{"\"abc\""},
-	},
 	// Bit test ops on amd64, issue 18943.
 	{
 		fn: `

test/codegen/maps.go

@@ -0,0 +1,38 @@
+// asmcheck
+
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package codegen
+
+// This file contains code generation tests related to the handling of
+// map types.
+
+// ------------------- //
+//     Access Const    //
+// ------------------- //
+
+// Direct use of constants in fast map access calls (Issue #19015).
+
+func AccessInt1(m map[int]int) int {
+	// amd64:"MOVQ\t[$]5"
+	return m[5]
+}
+
+func AccessInt2(m map[int]int) bool {
+	// amd64:"MOVQ\t[$]5"
+	_, ok := m[5]
+	return ok
+}
+
+func AccessString1(m map[string]int) int {
+	// amd64:`.*"abc"`
+	return m["abc"]
+}
+
+func AccessString2(m map[string]int) bool {
+	// amd64:`.*"abc"`
+	_, ok := m["abc"]
+	return ok
+}