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cmd/compile: remove nil check in accessing PAUTOHEAP variable 

CL 23393 introduces PAUTOHEAP, and access of PAUTOHEAP variable is
rewritten to indirection of a PAUTO variable. Mark this variable
non-nil, so this indirection does not introduce extra nil checks.

Change-Id: I31853eed5e60238b6c5bc0546e2e9ab340dcddd9
Reviewed-on: https://go-review.googlesource.com/26831
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Cherry Zhang 2016-08-11 09:54:04 -04:00
parent 40cf4ad0ef
commit 4c4ca83120
1 changed files with 3 additions and 1 deletions
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4
src/cmd/compile/internal/gc/walk.go
View File

@ -506,7 +506,9 @@ func walkexpr(n *Node, init *Nodes) *Node {
if n.Op == ONAME && n.Class == PAUTOHEAP {
nn := Nod(OIND, n.Name.Heapaddr, nil)
nn = typecheck(nn, Erv)
return walkexpr(nn, init)
nn = walkexpr(nn, init)
nn.Left.NonNil = true
return nn
}
opswitch: