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-rw-r--r--test/fixedbugs/issue43099.go34
1 files changed, 34 insertions, 0 deletions
diff --git a/test/fixedbugs/issue43099.go b/test/fixedbugs/issue43099.go
new file mode 100644
index 0000000..16f18e5
--- /dev/null
+++ b/test/fixedbugs/issue43099.go
@@ -0,0 +1,34 @@
+// compile
+
+// Copyright 2020 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.
+
+// Check to make sure we don't try to constant fold a divide by zero.
+// This is a tricky test, as we need a value that's not recognized as 0
+// until lowering (otherwise it gets handled in a different path).
+
+package p
+
+func f() {
+ var i int
+ var s string
+ for i > 0 {
+ _ = s[0]
+ i++
+ }
+
+ var c chan int
+ c <- 1 % i
+}
+
+func f32() uint32 {
+ s := "\x00\x00\x00\x00"
+ c := uint32(s[0]) | uint32(s[1])<<8 | uint32(s[2])<<16 | uint32(s[3])<<24
+ return 1 / c
+}
+func f64() uint64 {
+ s := "\x00\x00\x00\x00\x00\x00\x00\x00"
+ c := uint64(s[0]) | uint64(s[1])<<8 | uint64(s[2])<<16 | uint64(s[3])<<24 | uint64(s[4])<<32 | uint64(s[5])<<40 | uint64(s[6])<<48 | uint64(s[7])<<56
+ return 1 / c
+}