64-bit integer math bugs

R=r
DELTA=46  (46 added, 0 deleted, 0 changed)
OCL=29569
CL=29614

test/bugs/bug155.go

+// $G $D/$F.go && $L $F.$A || echo BUG: bug155
+
+// Copyright 2009 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
+
+const big uint64 = 1<<63
+
+func f(a uint64) uint64 {
+	return a << big
+}
+
+func main() {
+	f(1)
+}
+
+/*
+main·f: doasm: notfound from=75 to=13 (82)    SHLQ    $-9223372036854775808,BX
+main·f: doasm: notfound from=75 to=13 (82)    SHLQ    $-9223372036854775808,BX
+main·f: doasm: notfound from=75 to=13 (82)    SHLQ    $-9223372036854775808,BX
+*/

test/bugs/bug156.go

+// $G $D/$F.go || echo BUG: bug156
+
+// Copyright 2009 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(a int64) int64 {
+	const b int64 = 0;
+	n := a &^ b;
+	return n;
+}
+
+func main() {
+	f(1)
+}
+
+/*
+bug156.go:7: constant 18446744073709551615 overflows int64
+*/

test/golden.out

@@ -104,6 +104,16 @@ BUG should compile
 5 7
 BUG: should crash
 
+=========== bugs/bug155.go
+main·f: doasm: notfound from=75 to=13 (82)    SHLQ    $-9223372036854775808,BX
+main·f: doasm: notfound from=75 to=13 (82)    SHLQ    $-9223372036854775808,BX
+main·f: doasm: notfound from=75 to=13 (82)    SHLQ    $-9223372036854775808,BX
+BUG: bug155
+
+=========== bugs/bug156.go
+bugs/bug156.go:7: constant 18446744073709551615 overflows int64
+BUG: bug156
+
 =========== fixedbugs/bug016.go
 fixedbugs/bug016.go:7: constant -3 overflows uint