1 files changed, 154 insertions, 0 deletions
diff --git a/test/codegen/maps.go b/test/codegen/maps.go
new file mode 100644
index 0000000..ea3a70d
--- /dev/null
+++ b/test/codegen/maps.go
@@ -0,0 +1,154 @@
+// 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:"MOV[LQ]\t[$]5"
+	return m[5]
+}
+
+func AccessInt2(m map[int]int) bool {
+	// amd64:"MOV[LQ]\t[$]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
+}
+
+// ------------------- //
+//  String Conversion  //
+// ------------------- //
+
+func LookupStringConversionSimple(m map[string]int, bytes []byte) int {
+	// amd64:-`.*runtime\.slicebytetostring\(`
+	return m[string(bytes)]
+}
+
+func LookupStringConversionStructLit(m map[struct{ string }]int, bytes []byte) int {
+	// amd64:-`.*runtime\.slicebytetostring\(`
+	return m[struct{ string }{string(bytes)}]
+}
+
+func LookupStringConversionArrayLit(m map[[2]string]int, bytes []byte) int {
+	// amd64:-`.*runtime\.slicebytetostring\(`
+	return m[[2]string{string(bytes), string(bytes)}]
+}
+
+func LookupStringConversionNestedLit(m map[[1]struct{ s [1]string }]int, bytes []byte) int {
+	// amd64:-`.*runtime\.slicebytetostring\(`
+	return m[[1]struct{ s [1]string }{struct{ s [1]string }{s: [1]string{string(bytes)}}}]
+}
+
+func LookupStringConversionKeyedArrayLit(m map[[2]string]int, bytes []byte) int {
+	// amd64:-`.*runtime\.slicebytetostring\(`
+	return m[[2]string{0: string(bytes)}]
+}
+
+// ------------------- //
+//     Map Clear       //
+// ------------------- //
+
+// Optimization of map clear idiom (Issue #20138).
+
+func MapClearReflexive(m map[int]int) {
+	// amd64:`.*runtime\.mapclear`
+	// amd64:-`.*runtime\.mapiterinit`
+	for k := range m {
+		delete(m, k)
+	}
+}
+
+func MapClearIndirect(m map[int]int) {
+	s := struct{ m map[int]int }{m: m}
+	// amd64:`.*runtime\.mapclear`
+	// amd64:-`.*runtime\.mapiterinit`
+	for k := range s.m {
+		delete(s.m, k)
+	}
+}
+
+func MapClearPointer(m map[*byte]int) {
+	// amd64:`.*runtime\.mapclear`
+	// amd64:-`.*runtime\.mapiterinit`
+	for k := range m {
+		delete(m, k)
+	}
+}
+
+func MapClearNotReflexive(m map[float64]int) {
+	// amd64:`.*runtime\.mapiterinit`
+	// amd64:-`.*runtime\.mapclear`
+	for k := range m {
+		delete(m, k)
+	}
+}
+
+func MapClearInterface(m map[interface{}]int) {
+	// amd64:`.*runtime\.mapiterinit`
+	// amd64:-`.*runtime\.mapclear`
+	for k := range m {
+		delete(m, k)
+	}
+}
+
+func MapClearSideEffect(m map[int]int) int {
+	k := 0
+	// amd64:`.*runtime\.mapiterinit`
+	// amd64:-`.*runtime\.mapclear`
+	for k = range m {
+		delete(m, k)
+	}
+	return k
+}
+
+func MapLiteralSizing(x int) (map[int]int, map[int]int) {
+	// amd64:"MOVL\t[$]10,"
+	m := map[int]int{
+		0: 0,
+		1: 1,
+		2: 2,
+		3: 3,
+		4: 4,
+		5: 5,
+		6: 6,
+		7: 7,
+		8: 8,
+		9: 9,
+	}
+	// amd64:"MOVL\t[$]10,"
+	n := map[int]int{
+		0: x,
+		1: x,
+		2: x,
+		3: x,
+		4: x,
+		5: x,
+		6: x,
+		7: x,
+		8: x,
+		9: x,
+	}
+	return m, n
+}