cmd/compile: fix print/println when input is uint

Fixes #21887

Change-Id: I30e8e03ecfb67a2c4deedc2c8436da4c4782136d
Reviewed-on: https://go-review.googlesource.com/63971
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>

src/cmd/compile/internal/gc/walk.go

@@ -2127,13 +2127,13 @@ func walkprint(nn *Node, init *Nodes) *Node {
 		case TSLICE:
 			on = syslook("printslice")
 			on = substArgTypes(on, n.Type) // any-1
-		case TUINT64:
+		case TUINT, TUINT8, TUINT16, TUINT32, TUINT64, TUINTPTR:
 			if isRuntimePkg(n.Type.Sym.Pkg) && n.Type.Sym.Name == "hex" {
 				on = syslook("printhex")
 			} else {
 				on = syslook("printuint")
 			}
-		case TINT, TUINT, TUINTPTR, TINT8, TUINT8, TINT16, TUINT16, TINT32, TUINT32, TINT64:
+		case TINT, TINT8, TINT16, TINT32, TINT64:
 			on = syslook("printint")
 		case TFLOAT32, TFLOAT64:
 			on = syslook("printfloat")

test/fixedbugs/issue21887.go

@@ -0,0 +1,25 @@
+// cmpout
+
+// Copyright 2017 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.
+
+// Issue 21887: println(^uint(0)) fails to compile
+
+package main
+
+import "strconv"
+
+func main() {
+	if strconv.IntSize == 32 {
+		println(^uint(0))
+	} else {
+		println(^uint32(0))
+	}
+
+	if strconv.IntSize == 64 {
+		println(^uint(0))
+	} else {
+		println(^uint64(0))
+	}
+}

test/fixedbugs/issue21887.out

@@ -0,0 +1,2 @@
+4294967295
+18446744073709551615

test/print.go

@@ -19,6 +19,11 @@ func main() {
 	println(([]int)(nil))       // printslice
 	println(int64(-7))          // printint
 	println(uint64(7))          // printuint
+	println(uint32(7))          // printuint
+	println(uint16(7))          // printuint
+	println(uint8(7))           // printuint
+	println(uint(7))            // printuint
+	println(uintptr(7))         // printuint
 	println(8.0)                // printfloat
 	println(complex(9.0, 10.0)) // printcomplex
 	println(true)               // printbool
@@ -28,11 +33,18 @@ func main() {
 
 	// test goprintf
 	defer println((interface{})(nil))
-	defer println((interface{f()})(nil))
+	defer println((interface {
+		f()
+	})(nil))
 	defer println((map[int]int)(nil))
 	defer println(([]int)(nil))
 	defer println(int64(-11))
 	defer println(uint64(12))
+	defer println(uint32(12))
+	defer println(uint16(12))
+	defer println(uint8(12))
+	defer println(uint(12))
+	defer println(uintptr(12))
 	defer println(13.0)
 	defer println(complex(14.0, 15.0))
 	defer println(true)

test/print.out

@@ -4,6 +4,11 @@
 [0/0]0x0
 -7
 7
+7
+7
+7
+7
+7
 +8.000000e+000
 (+9.000000e+000+1.000000e+001i)
 true
@@ -17,6 +22,11 @@ true
 (+1.400000e+001+1.500000e+001i)
 +1.300000e+001
 12
+12
+12
+12
+12
+12
 -11
 [0/0]0x0
 0x0