1 files changed, 41 insertions, 0 deletions
diff --git a/test/codegen/logic.go b/test/codegen/logic.go
new file mode 100644
index 0000000..ac33f91
--- /dev/null
+++ b/test/codegen/logic.go
@@ -0,0 +1,41 @@
+// 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
+
+// Test to make sure that (CMPQ (ANDQ x y) [0]) does not get rewritten to
+// (TESTQ x y) if the ANDQ has other uses. If that rewrite happens, then one
+// of the args of the ANDQ needs to be saved so it can be used as the arg to TESTQ.
+func andWithUse(x, y int) int {
+	z := x & y
+	// amd64:`TESTQ\s(AX, AX|BX, BX|CX, CX|DX, DX|SI, SI|DI, DI|R8, R8|R9, R9|R10, R10|R11, R11|R12, R12|R13, R13|R15, R15)`
+	if z == 0 {
+		return 77
+	}
+	// use z by returning it
+	return z
+}
+
+// Verify (OR x (NOT y)) rewrites to (ORN x y) where supported
+func ornot(x, y int) int {
+	// ppc64x:"ORN"
+	z := x | ^y
+	return z
+}
+
+// Verify that (OR (NOT x) (NOT y)) rewrites to (NOT (AND x y))
+func orDemorgans(x, y int) int {
+	// amd64:"AND",-"OR"
+	z := ^x | ^y
+	return z
+}
+
+// Verify that (AND (NOT x) (NOT y)) rewrites to (NOT (OR x y))
+func andDemorgans(x, y int) int {
+	// amd64:"OR",-"AND"
+	z := ^x & ^y
+	return z
+}