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Commit 1c7bee05 authored by Ken Thompson's avatar Ken Thompson
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bug 155 

R=r
OCL=29619
CL=29619
parent cc7c31ba
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Inline Side-by-side
Showing with 3 additions and 7 deletions
src/cmd/6g/ggen.c
View file @ 1c7bee05
...@@ -557,13 +557,15 @@ cgen_shift(int op, Node *nl, Node *nr, Node *res) ...@@ -557,13 +557,15 @@ cgen_shift(int op, Node *nl, Node *nr, Node *res)
Node n1, n2, n3; Node n1, n2, n3;
int a; int a;
Prog *p1; Prog *p1;
uvlong sc;
a = optoas(op, nl->type); a = optoas(op, nl->type);
if(nr->op == OLITERAL) { if(nr->op == OLITERAL) {
regalloc(&n1, nl->type, res); regalloc(&n1, nl->type, res);
cgen(nl, &n1); 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 // large shift gets 2 shifts by width
nodconst(&n3, types[TUINT32], nl->type->width*8-1); nodconst(&n3, types[TUINT32], nl->type->width*8-1);
gins(a, &n3, &n1); gins(a, &n3, &n1);
......
test/golden.out
View file @ 1c7bee05
...@@ -104,12 +104,6 @@ BUG should compile ...@@ -104,12 +104,6 @@ BUG should compile
5 7 5 7
BUG: should crash 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
bugs/bug156.go:7: constant 18446744073709551615 overflows int64 bugs/bug156.go:7: constant 18446744073709551615 overflows int64
BUG: bug156 BUG: bug156
......
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