diff options
Diffstat (limited to 'src/cmd')
| -rw-r--r-- | src/cmd/compile/internal/ssa/regalloc.go | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/src/cmd/compile/internal/ssa/regalloc.go b/src/cmd/compile/internal/ssa/regalloc.go index 7b97c8e097..0339b073ae 100644 --- a/src/cmd/compile/internal/ssa/regalloc.go +++ b/src/cmd/compile/internal/ssa/regalloc.go @@ -1582,6 +1582,19 @@ func (s *regAllocState) regalloc(f *Func) { } v := s.orig[vid] m := s.compatRegs(v.Type) &^ s.used + // Used desired register if available. + outerloop: + for _, e := range desired.entries { + if e.ID != v.ID { + continue + } + for _, r := range e.regs { + if r != noRegister && m>>r&1 != 0 { + m = regMask(1) << r + break outerloop + } + } + } if m&^desired.avoid != 0 { m &^= desired.avoid } @@ -1643,7 +1656,9 @@ func (s *regAllocState) regalloc(f *Func) { // we'll rematerialize during the merge. continue } - //fmt.Printf("live-at-end spill for %s at %s\n", s.orig[e.ID], b) + if s.f.pass.debug > regDebug { + fmt.Printf("live-at-end spill for %s at %s\n", s.orig[e.ID], b) + } spill := s.makeSpill(s.orig[e.ID], b) s.spillLive[b.ID] = append(s.spillLive[b.ID], spill.ID) } @@ -2514,7 +2529,7 @@ func (s *regAllocState) computeLive() { for _, b := range f.Blocks { fmt.Printf(" %s:", b) for _, x := range s.live[b.ID] { - fmt.Printf(" v%d", x.ID) + fmt.Printf(" v%d(%d)", x.ID, x.dist) for _, e := range s.desired[b.ID].entries { if e.ID != x.ID { continue |