issue32680.go

     1  // run -gcflags=-d=ssa/check/on
     2  
     3  // Copyright 2019 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // As of 2019-06, bug affects/ed amd64 and s390x.
     8  
     9  package main
    10  
    11  var foo = []byte{105, 57, 172, 152}
    12  
    13  func main() {
    14  	for i := 0; i < len(foo); i += 4 {
    15  		// Requires inlining and non-constant i
    16  		// Note the bug/fix also apply to different widths, but was unable to reproduce for those.
    17  		println(readLittleEndian32_2(foo[i], foo[i+1], foo[i+2], foo[i+3]))
    18  	}
    19  }
    20  
    21  func readLittleEndian32_2(a, b, c, d byte) uint32 {
    22  	return uint32(a) | (uint32(b) << 8) | (uint32(c) << 16) | (uint32(d) << 24)
    23  }
    24
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