diff options
| -rw-r--r-- | src/cmd/compile/internal/amd64/ssa.go | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/cmd/compile/internal/amd64/ssa.go b/src/cmd/compile/internal/amd64/ssa.go index e3129edbf1..49ef415e66 100644 --- a/src/cmd/compile/internal/amd64/ssa.go +++ b/src/cmd/compile/internal/amd64/ssa.go @@ -867,10 +867,10 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) { case ssa.OpAMD64POPCNTQ, ssa.OpAMD64POPCNTL: if v.Args[0].Reg() != v.Reg() { // POPCNT on Intel has a false dependency on the destination register. - // Zero the destination to break the dependency. - p := s.Prog(x86.AMOVQ) - p.From.Type = obj.TYPE_CONST - p.From.Offset = 0 + // Xor register with itself to break the dependency. + p := s.Prog(x86.AXORQ) + p.From.Type = obj.TYPE_REG + p.From.Reg = v.Reg() p.To.Type = obj.TYPE_REG p.To.Reg = v.Reg() } |