1 files changed, 71 insertions, 0 deletions
diff --git a/misc/cgo/testshared/testdata/global/main.go b/misc/cgo/testshared/testdata/global/main.go
new file mode 100644
index 0000000..f43e7c3
--- /dev/null
+++ b/misc/cgo/testshared/testdata/global/main.go
@@ -0,0 +1,71 @@
+// Copyright 2017 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 main
+
+import (
+	"testshared/globallib"
+)
+
+//go:noinline
+func testLoop() {
+	for i, s := range globallib.Data {
+		if s != int64(i) {
+			panic("testLoop: mismatch")
+		}
+	}
+}
+
+//go:noinline
+func ptrData() *[1<<20 + 10]int64 {
+	return &globallib.Data
+}
+
+//go:noinline
+func testMediumOffset() {
+	for i, s := range globallib.Data[1<<16-2:] {
+		if s != int64(i)+1<<16-2 {
+			panic("testMediumOffset: index mismatch")
+		}
+	}
+
+	x := globallib.Data[1<<16-1]
+	if x != 1<<16-1 {
+		panic("testMediumOffset: direct mismatch")
+	}
+
+	y := &globallib.Data[1<<16-3]
+	if y != &ptrData()[1<<16-3] {
+		panic("testMediumOffset: address mismatch")
+	}
+}
+
+//go:noinline
+func testLargeOffset() {
+	for i, s := range globallib.Data[1<<20:] {
+		if s != int64(i)+1<<20 {
+			panic("testLargeOffset: index mismatch")
+		}
+	}
+
+	x := globallib.Data[1<<20+1]
+	if x != 1<<20+1 {
+		panic("testLargeOffset: direct mismatch")
+	}
+
+	y := &globallib.Data[1<<20+2]
+	if y != &ptrData()[1<<20+2] {
+		panic("testLargeOffset: address mismatch")
+	}
+}
+
+func main() {
+	testLoop()
+
+	// SSA rules commonly merge offsets into addresses. These
+	// tests access global data in different ways to try
+	// and exercise different SSA rules.
+	testMediumOffset()
+	testLargeOffset()
+}