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cmd/gc: don't emit type instructions for nonexisting locals

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If all locals are optimized away, the type instructions would stay in the instruction stream. Call fixautoused to scrub the output.

Fixes #4915.

R=rsc
CC=golang-dev
https://golang.org/cl/7385055
This commit is contained in:
Daniel Morsing 2013-02-27 19:47:14 +01:00
parent 73c21b1312
commit 43c04ba1b8
1 changed files with 2 additions and 0 deletions
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2
src/cmd/gc/pgen.c
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@ -209,8 +209,10 @@ allocauto(Prog* ptxt)
ll = curfn->dcl;
n = ll->n;
if (n->class == PAUTO && n->op == ONAME && !n->used) {
// No locals used at all
curfn->dcl = nil;
stksize = 0;
fixautoused(ptxt);
return;
}