[dev.ssa] cmd/compile/internal/ssa: reuse Aux values for PEXTERN
This improves cse and works correctly now that divide by zero is checked
explicitly.
Change-Id: If54fbe403ed5230b897afc5def644ba9f0056dfd
Reviewed-on: https://go-review.googlesource.com/16454
Run-TryBot: Todd Neal <todd@tneal.org>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go
index 4b4dc09..b96661d 100644
--- a/src/cmd/compile/internal/gc/ssa.go
+++ b/src/cmd/compile/internal/gc/ssa.go
@@ -2265,7 +2265,7 @@
switch n.Class {
case PEXTERN:
// global variable
- aux := &ssa.ExternSymbol{n.Type, n.Sym}
+ aux := s.lookupSymbol(n, &ssa.ExternSymbol{n.Type, n.Sym})
v := s.entryNewValue1A(ssa.OpAddr, t, aux, s.sb)
// TODO: Make OpAddr use AuxInt as well as Aux.
if n.Xoffset != 0 {
