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cmd/6g: fix undefined behavior in reg.c

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Update #8527

Fixes, cmd/6g/reg.c:847:24: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'

LGTM=minux, rsc
R=minux, rsc
CC=dvyukov, golang-codereviews
https://golang.org/cl/129290043
This commit is contained in:
Dave Cheney 2014-08-19 10:52:50 +10:00
parent 326f48eb9c
commit afb6221bf7
1 changed files with 1 additions and 1 deletions
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2
src/cmd/6g/reg.c
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@ -844,7 +844,7 @@ prop(Reg *r, Bits ref, Bits cal)
if(v == v1 || ((cal.b[j/32]>>(j&31))&1) == 0) {
for(; v1 != nil; v1 = v1->nextinnode) {
j = v1 - var;
cal.b[j/32] |= 1<<(j&31);
cal.b[j/32] |= 1UL<<(j&31);
}
}
}