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[dev.ssa] cmd/compile: implement OINDREG in expr context

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Change-Id: I1922656c99773255e5bc15b5a2bd79f19a2fe82c
Reviewed-on: https://go-review.googlesource.com/12796
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2015-07-28 12:37:46 -07:00
parent 71a4c4bb8d
commit 25d1916816
1 changed files with 13 additions and 1 deletions
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14
src/cmd/compile/internal/gc/ssa.go
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@ -1000,6 +1000,14 @@ func (s *state) expr(n *Node) *ssa.Value {
case OADDR: case OADDR:
return s.addr(n.Left) return s.addr(n.Left)
case OINDREG:
if int(n.Reg) != Thearch.REGSP {
s.Unimplementedf("OINDREG of non-SP register %s in expr: %v", obj.Rconv(int(n.Reg)), n)
return nil
}
addr := s.entryNewValue1I(ssa.OpOffPtr, Ptrto(n.Type), n.Xoffset, s.sp)
return s.newValue2(ssa.OpLoad, n.Type, addr, s.mem())
case OIND: case OIND:
p := s.expr(n.Left) p := s.expr(n.Left)
s.nilCheck(p) s.nilCheck(p)
@ -1184,8 +1192,12 @@ func (s *state) addr(n *Node) *ssa.Value {
return nil return nil
} }
case OINDREG: case OINDREG:
// indirect off a register (TODO: always SP?) // indirect off a register
// used for storing/loading arguments/returns to/from callees // used for storing/loading arguments/returns to/from callees
if int(n.Reg) != Thearch.REGSP {
s.Unimplementedf("OINDREG of non-SP register %s in addr: %v", obj.Rconv(int(n.Reg)), n)
return nil
}
return s.entryNewValue1I(ssa.OpOffPtr, Ptrto(n.Type), n.Xoffset, s.sp) return s.entryNewValue1I(ssa.OpOffPtr, Ptrto(n.Type), n.Xoffset, s.sp)
case OINDEX: case OINDEX:
if n.Left.Type.IsSlice() { if n.Left.Type.IsSlice() {