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cmd/compile: handle mem copies in amd64 backend

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Fixes noopt builder.

Change-Id: If13373b2597f0fcc9b1b2f9c860f2bd043e43c6c
Reviewed-on: https://go-review.googlesource.com/22338
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Keith Randall 2016-04-21 10:02:36 -07:00
parent 508a424eed
commit f8fc3710fd
1 changed files with 3 additions and 0 deletions
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3
src/cmd/compile/internal/amd64/ssa.go
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@ -667,6 +667,9 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
p.To.Offset = v.AuxInt
case ssa.OpCopy, ssa.OpAMD64MOVQconvert: // TODO: use MOVQreg for reg->reg copies instead of OpCopy?
if v.Type.IsMemory() {
return
}
x := gc.SSARegNum(v.Args[0])
y := gc.SSARegNum(v)
if x != y {