Adding upstream version 1.19.8.upstream/1.19.8upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 35 insertions, 0 deletions

diff --git a/test/codegen/clobberdead.go b/test/codegen/clobberdead.go
new file mode 100644
index 0000000..732be5f
--- /dev/null
+++ b/test/codegen/clobberdead.go
@@ -0,0 +1,35 @@
+// asmcheck -gcflags=-clobberdead
+
+// +build amd64 arm64
+
+// Copyright 2021 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
+
+type T [2]*int // contain pointer, not SSA-able (so locals are not registerized)
+
+var p1, p2, p3 T
+
+func F() {
+	// 3735936685 is 0xdeaddead. On ARM64 R27 is REGTMP.
+	// clobber x, y at entry. not clobber z (stack object).
+	// amd64:`MOVL\t\$3735936685, command-line-arguments\.x`, `MOVL\t\$3735936685, command-line-arguments\.y`, -`MOVL\t\$3735936685, command-line-arguments\.z`
+	// arm64:`MOVW\tR27, command-line-arguments\.x`, `MOVW\tR27, command-line-arguments\.y`, -`MOVW\tR27, command-line-arguments\.z`
+	x, y, z := p1, p2, p3
+	addrTaken(&z)
+	// x is dead at the call (the value of x is loaded before the CALL), y is not
+	// amd64:`MOVL\t\$3735936685, command-line-arguments\.x`, -`MOVL\t\$3735936685, command-line-arguments\.y`
+	// arm64:`MOVW\tR27, command-line-arguments\.x`, -`MOVW\tR27, command-line-arguments\.y`
+	use(x)
+	// amd64:`MOVL\t\$3735936685, command-line-arguments\.x`, `MOVL\t\$3735936685, command-line-arguments\.y`
+	// arm64:`MOVW\tR27, command-line-arguments\.x`, `MOVW\tR27, command-line-arguments\.y`
+	use(y)
+}
+
+//go:noinline
+func use(T) {}
+
+//go:noinline
+func addrTaken(*T) {}