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Revert "cmd/compile: ensure spills of int/float reg args land in abi slots"
This reverts CL 308510. Reason for revert: It breaks "GOEXPERIMENT=regabi,regabiargs ./make.bash" Change-Id: I553654690ec73120f8a6258dd80623853c430df0 Reviewed-on: https://go-review.googlesource.com/c/go/+/308932 Trust: David Chase <drchase@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com>
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@ -218,15 +218,8 @@ func (s *stackAllocState) stackalloc() {
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// If this is a named value, try to use the name as
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// the spill location.
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var name LocalSlot
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interfere := false
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if v.Op == OpStoreReg {
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a := v.Args[0]
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name = names[a.ID]
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if name.N == nil && (a.Op == OpArgIntReg || a.Op == OpArgFloatReg) {
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// Try harder to spill to the abi-provided spill slot, even if the names are messed up.
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nameOff := a.Aux.(*AuxNameOffset)
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name = LocalSlot{N: nameOff.Name, Type: v.Type, Off: nameOff.Offset}
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}
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name = names[v.Args[0].ID]
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} else {
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name = names[v.ID]
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}
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@ -237,7 +230,6 @@ func (s *stackAllocState) stackalloc() {
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// A variable can interfere with itself.
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// It is rare, but it can happen.
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s.nSelfInterfere++
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interfere = true
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goto noname
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}
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}
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@ -279,11 +271,7 @@ func (s *stackAllocState) stackalloc() {
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// Use the stack variable at that index for v.
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loc := locs[i]
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if f.pass.debug > stackDebug {
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reason := "noname"
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if interfere {
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reason = "interfere"
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}
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fmt.Printf("stackalloc (%s) %s to %s\n", reason, v, loc)
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fmt.Printf("stackalloc %s to %s\n", v, loc)
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}
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f.setHome(v, loc)
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slots[v.ID] = i
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