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-rw-r--r--test/fixedbugs/issue29943.go28
1 files changed, 28 insertions, 0 deletions
diff --git a/test/fixedbugs/issue29943.go b/test/fixedbugs/issue29943.go
new file mode 100644
index 0000000..ff47de5
--- /dev/null
+++ b/test/fixedbugs/issue29943.go
@@ -0,0 +1,28 @@
+// run
+
+// Copyright 2019 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.
+
+// Code was miscompiled on ppc64le due to incorrect zero-extension
+// that was CSE'd.
+
+package main
+
+//go:noinline
+func g(i uint64) uint64 {
+ return uint64(uint32(i))
+}
+
+var sink uint64
+
+func main() {
+ for i := uint64(0); i < 1; i++ {
+ i32 := int32(i - 1)
+ sink = uint64((uint32(i32) << 1) ^ uint32((i32 >> 31)))
+ x := g(uint64(i32))
+ if x != uint64(uint32(i32)) {
+ panic(x)
+ }
+ }
+}