Storing an out of range constant into a variable should

ideally cause the compiler to give an error.  Right now 6g
warns about large shifts but does not give an error.  This CL
removes the out of range shift from shift.go, so that it will
work with gccgo, and adds a test case in bugs/ to be fixed at
a later date.

R=ken,r
DELTA=23  (9 added, 14 deleted, 0 changed)
OCL=16085
CL=16088

test/bugs/bug108.go

@@ -0,0 +1,10 @@
+// errchk $G $D/$F.go
+
+// 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() {
+	v := 1 << 1025;		// ERROR "overflow"
+}

test/golden.out

@@ -37,14 +37,6 @@ Hello World!
 =========== ken/rob2.go
 (defn foo (add 12 34))
 
-=========== ken/shift.go
-ken/shift.go:50: stupid shift: 1025
-ken/shift.go:51: stupid shift: 1025
-ken/shift.go:57: stupid shift: 1025
-ken/shift.go:58: stupid shift: 1025
-ken/shift.go:64: stupid shift: 1025
-ken/shift.go:65: stupid shift: 1025
-
 =========== ken/simpprint.go
 hello world
 
@@ -172,6 +164,10 @@ BUG: errchk: command succeeded unexpectedly:  6g bugs/bug104.go
 =========== bugs/bug107.go
 BUG: errchk: command succeeded unexpectedly:  6g bugs/bug107.go
 
+=========== bugs/bug108.go
+bugs/bug108.go:4: stupid shift: 1025
+BUG: errchk: command succeeded unexpectedly:  6g bugs/bug108.go
+
 =========== fixedbugs/bug016.go
 fixedbugs/bug016.go:7: overflow converting constant to <uint32>UINT32
 

test/ken/shift.go

@@ -51,22 +51,16 @@ main()
 	testi( int(1234) >>    0, 0,0,1);
 	testi( int(1234) <<    5, 0,1,0);
 	testi( int(1234) >>    5, 0,1,1);
-	testi( int(1234) << 1025, 0,2,0);
-	testi( int(1234) >> 1025, 0,2,1);
 
 	testi(int(-1234) <<    0, 1,0,0);
 	testi(int(-1234) >>    0, 1,0,1);
 	testi(int(-1234) <<    5, 1,1,0);
 	testi(int(-1234) >>    5, 1,1,1);
-	testi(int(-1234) << 1025, 1,2,0);
-	testi(int(-1234) >> 1025, 1,2,1);
 
 	testu(uint(5678) <<    0, 2,0,0);
 	testu(uint(5678) >>    0, 2,0,1);
 	testu(uint(5678) <<    5, 2,1,0);
 	testu(uint(5678) >>    5, 2,1,1);
-	testu(uint(5678) << 1025, 2,2,0);
-	testu(uint(5678) >> 1025, 2,2,1);
 
 	/*
 	 * test variable evaluations