diff options
Diffstat (limited to 'src/cmd/6g/cgen.c')
| -rw-r--r-- | src/cmd/6g/cgen.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/cmd/6g/cgen.c b/src/cmd/6g/cgen.c index ae1309142..4dd505b08 100644 --- a/src/cmd/6g/cgen.c +++ b/src/cmd/6g/cgen.c @@ -1585,6 +1585,13 @@ componentgen(Node *nr, Node *nl) freer = 1; } } + + // nl and nr are 'cadable' which basically means they are names (variables) now. + // If they are the same variable, don't generate any code, because the + // VARDEF we generate will mark the old value as dead incorrectly. + // (And also the assignments are useless.) + if(nr != N && nl->op == ONAME && nr->op == ONAME && nl == nr) + goto yes; switch(nl->type->etype) { case TARRAY: |