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bug 155

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R=r
OCL=29619
CL=29619
This commit is contained in:
Ken Thompson 2009-05-29 14:42:24 -07:00
parent cc7c31baa4
commit 1c7bee0567
3 changed files with 3 additions and 7 deletions
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4
src/cmd/6g/ggen.c
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@ -557,13 +557,15 @@ cgen_shift(int op, Node *nl, Node *nr, Node *res)
Node n1, n2, n3;
int a;
Prog *p1;
uvlong sc;
a = optoas(op, nl->type);
if(nr->op == OLITERAL) {
regalloc(&n1, nl->type, res);
cgen(nl, &n1);
if(mpgetfix(nr->val.u.xval) >= nl->type->width*8) {
sc = mpgetfix(nr->val.u.xval);
if(sc >= nl->type->width*8) {
// large shift gets 2 shifts by width
nodconst(&n3, types[TUINT32], nl->type->width*8-1);
gins(a, &n3, &n1);

0
test/bugs/bug155.go → test/fixedbugs/bug155.go
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6
test/golden.out
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@ -104,12 +104,6 @@ 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