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cmd/compile/internal/ssa: delete unused code

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Fixes #46186

Change-Id: Idb0674079f9484593e07cca172dfbb19be0e594d
GitHub-Last-Rev: 615fc53655
GitHub-Pull-Request: golang/go#46185
Reviewed-on: https://go-review.googlesource.com/c/go/+/320111
Reviewed-by: Ben Shi <powerman1st@163.com>
Reviewed-by: Keith Randall <khr@golang.org>
Trust: David Chase <drchase@google.com>
This commit is contained in:
cuiweixie 2021-08-16 14:49:45 +00:00 committed by Keith Randall
parent fe489c86a7
commit ea8298e2f5
1 changed files with 0 additions and 17 deletions
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17
src/cmd/compile/internal/ssa/regalloc.go
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@ -1865,23 +1865,6 @@ func (s *regAllocState) regalloc(f *Func) {
}
func (s *regAllocState) placeSpills() {
f := s.f
// Precompute some useful info.
phiRegs := make([]regMask, f.NumBlocks())
for _, b := range s.visitOrder {
var m regMask
for _, v := range b.Values {
if v.Op != OpPhi {
break
}
if r, ok := f.getHome(v.ID).(*Register); ok {
m |= regMask(1) << uint(r.num)
}
}
phiRegs[b.ID] = m
}
mustBeFirst := func(op Op) bool {
return op.isLoweredGetClosurePtr() || op == OpPhi || op == OpArgIntReg || op == OpArgFloatReg
}