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[release-branch.go1] cmd/cc: fix uint right shift in constant evaluation

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««« backport aa2d2fa1e5a9
cmd/cc: fix uint right shift in constant evaluation
        Fixes #3664.

R=golang-dev, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/6249048

»»»
This commit is contained in:
Shenghou Ma 2012-06-13 16:24:15 -04:00
parent 536be05e32
commit b260999d4c
1 changed files with 4 additions and 1 deletions
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5
src/cmd/cc/scon.c
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@ -175,7 +175,10 @@ evconst(Node *n)
break;
case OLSHR:
v = (uvlong)l->vconst >> r->vconst;
if(l->type->width != sizeof(uvlong))
v = ((uvlong)l->vconst & 0xffffffffULL) >> r->vconst;
else
v = (uvlong)l->vconst >> r->vconst;
break;
case OASHR: