diff options
Diffstat (limited to 'test/fixedbugs/issue41711.go')
-rw-r--r-- | test/fixedbugs/issue41711.go | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/fixedbugs/issue41711.go b/test/fixedbugs/issue41711.go new file mode 100644 index 0000000000..4e09440ba5 --- /dev/null +++ b/test/fixedbugs/issue41711.go @@ -0,0 +1,17 @@ +// compile -d=ssa/check/on + +// 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. + +package main + +func f() uint32 { + s := "food" + x := uint32(s[0]) + uint32(s[1])<<8 + uint32(s[2])<<16 + uint32(s[3])<<24 + // x is a constant, but that's not known until lowering. + // shifting it by 8 moves the high byte up into the high 32 bits of + // a 64-bit word. That word is not properly sign-extended by the faulty + // rule, which causes the compiler to fail. + return x << 8 +} |