diff options
Diffstat (limited to 'src/cmd/compile/internal/ssa/stackalloc.go')
| -rw-r--r-- | src/cmd/compile/internal/ssa/stackalloc.go | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/cmd/compile/internal/ssa/stackalloc.go b/src/cmd/compile/internal/ssa/stackalloc.go index 797a6b05e6..0e6cae0924 100644 --- a/src/cmd/compile/internal/ssa/stackalloc.go +++ b/src/cmd/compile/internal/ssa/stackalloc.go @@ -182,8 +182,10 @@ func (s *stackAllocState) stackalloc() { func (s *stackAllocState) computeLive(spillLive [][]ID) { s.live = make([][]ID, s.f.NumBlocks()) var phis []*Value - live := newSparseSet(s.f.NumValues()) - t := newSparseSet(s.f.NumValues()) + live := s.f.newSparseSet(s.f.NumValues()) + defer s.f.retSparseSet(live) + t := s.f.newSparseSet(s.f.NumValues()) + defer s.f.retSparseSet(t) // Instead of iterating over f.Blocks, iterate over their postordering. // Liveness information flows backward, so starting at the end @@ -271,7 +273,8 @@ func (f *Func) setHome(v *Value, loc Location) { func (s *stackAllocState) buildInterferenceGraph() { f := s.f s.interfere = make([][]ID, f.NumValues()) - live := newSparseSet(f.NumValues()) + live := f.newSparseSet(f.NumValues()) + defer f.retSparseSet(live) for _, b := range f.Blocks { // Propagate liveness backwards to the start of the block. // Two values interfere if one is defined while the other is live. |