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cmd/compile: fold handling OCONV logic to separate function
So next CL can re-use the logic to perform checkptr instrumentation. Change-Id: I3241e9c3c84da04db71fd1d4fd83cb76b2e18521 Reviewed-on: https://go-review.googlesource.com/c/go/+/345435 Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com> Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Cuong Manh Le
parent
9cbc76bdf9
commit
8fad81cd62
@ -2323,6 +2323,175 @@ func (s *state) ssaShiftOp(op ir.Op, t *types.Type, u *types.Type) ssa.Op {
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return x
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}
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func (s *state) conv(n ir.Node, v *ssa.Value, ft, tt *types.Type) *ssa.Value {
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if ft.IsBoolean() && tt.IsKind(types.TUINT8) {
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// Bool -> uint8 is generated internally when indexing into runtime.staticbyte.
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return s.newValue1(ssa.OpCopy, tt, v)
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}
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if ft.IsInteger() && tt.IsInteger() {
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var op ssa.Op
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if tt.Size() == ft.Size() {
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op = ssa.OpCopy
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} else if tt.Size() < ft.Size() {
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// truncation
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switch 10*ft.Size() + tt.Size() {
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case 21:
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op = ssa.OpTrunc16to8
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case 41:
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op = ssa.OpTrunc32to8
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case 42:
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op = ssa.OpTrunc32to16
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case 81:
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op = ssa.OpTrunc64to8
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case 82:
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op = ssa.OpTrunc64to16
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case 84:
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op = ssa.OpTrunc64to32
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default:
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s.Fatalf("weird integer truncation %v -> %v", ft, tt)
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}
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} else if ft.IsSigned() {
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// sign extension
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switch 10*ft.Size() + tt.Size() {
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case 12:
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op = ssa.OpSignExt8to16
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case 14:
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op = ssa.OpSignExt8to32
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case 18:
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op = ssa.OpSignExt8to64
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case 24:
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op = ssa.OpSignExt16to32
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case 28:
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op = ssa.OpSignExt16to64
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case 48:
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op = ssa.OpSignExt32to64
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default:
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s.Fatalf("bad integer sign extension %v -> %v", ft, tt)
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}
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} else {
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// zero extension
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switch 10*ft.Size() + tt.Size() {
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case 12:
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op = ssa.OpZeroExt8to16
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case 14:
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op = ssa.OpZeroExt8to32
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case 18:
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op = ssa.OpZeroExt8to64
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case 24:
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op = ssa.OpZeroExt16to32
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case 28:
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op = ssa.OpZeroExt16to64
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case 48:
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op = ssa.OpZeroExt32to64
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default:
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s.Fatalf("weird integer sign extension %v -> %v", ft, tt)
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}
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}
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return s.newValue1(op, tt, v)
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}
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if ft.IsFloat() || tt.IsFloat() {
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conv, ok := fpConvOpToSSA[twoTypes{s.concreteEtype(ft), s.concreteEtype(tt)}]
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if s.config.RegSize == 4 && Arch.LinkArch.Family != sys.MIPS && !s.softFloat {
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if conv1, ok1 := fpConvOpToSSA32[twoTypes{s.concreteEtype(ft), s.concreteEtype(tt)}]; ok1 {
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conv = conv1
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}
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}
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if Arch.LinkArch.Family == sys.ARM64 || Arch.LinkArch.Family == sys.Wasm || Arch.LinkArch.Family == sys.S390X || s.softFloat {
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if conv1, ok1 := uint64fpConvOpToSSA[twoTypes{s.concreteEtype(ft), s.concreteEtype(tt)}]; ok1 {
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conv = conv1
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}
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}
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if Arch.LinkArch.Family == sys.MIPS && !s.softFloat {
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if ft.Size() == 4 && ft.IsInteger() && !ft.IsSigned() {
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// tt is float32 or float64, and ft is also unsigned
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if tt.Size() == 4 {
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return s.uint32Tofloat32(n, v, ft, tt)
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}
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if tt.Size() == 8 {
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return s.uint32Tofloat64(n, v, ft, tt)
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}
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} else if tt.Size() == 4 && tt.IsInteger() && !tt.IsSigned() {
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// ft is float32 or float64, and tt is unsigned integer
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if ft.Size() == 4 {
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return s.float32ToUint32(n, v, ft, tt)
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}
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if ft.Size() == 8 {
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return s.float64ToUint32(n, v, ft, tt)
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}
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}
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}
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if !ok {
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s.Fatalf("weird float conversion %v -> %v", ft, tt)
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}
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op1, op2, it := conv.op1, conv.op2, conv.intermediateType
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if op1 != ssa.OpInvalid && op2 != ssa.OpInvalid {
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// normal case, not tripping over unsigned 64
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if op1 == ssa.OpCopy {
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if op2 == ssa.OpCopy {
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return v
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}
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return s.newValueOrSfCall1(op2, tt, v)
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}
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if op2 == ssa.OpCopy {
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return s.newValueOrSfCall1(op1, tt, v)
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}
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return s.newValueOrSfCall1(op2, tt, s.newValueOrSfCall1(op1, types.Types[it], v))
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}
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// Tricky 64-bit unsigned cases.
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if ft.IsInteger() {
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// tt is float32 or float64, and ft is also unsigned
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if tt.Size() == 4 {
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return s.uint64Tofloat32(n, v, ft, tt)
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}
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if tt.Size() == 8 {
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return s.uint64Tofloat64(n, v, ft, tt)
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}
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s.Fatalf("weird unsigned integer to float conversion %v -> %v", ft, tt)
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}
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// ft is float32 or float64, and tt is unsigned integer
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if ft.Size() == 4 {
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return s.float32ToUint64(n, v, ft, tt)
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}
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if ft.Size() == 8 {
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return s.float64ToUint64(n, v, ft, tt)
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}
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s.Fatalf("weird float to unsigned integer conversion %v -> %v", ft, tt)
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return nil
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}
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if ft.IsComplex() && tt.IsComplex() {
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var op ssa.Op
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if ft.Size() == tt.Size() {
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switch ft.Size() {
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case 8:
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op = ssa.OpRound32F
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case 16:
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op = ssa.OpRound64F
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default:
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s.Fatalf("weird complex conversion %v -> %v", ft, tt)
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}
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} else if ft.Size() == 8 && tt.Size() == 16 {
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op = ssa.OpCvt32Fto64F
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} else if ft.Size() == 16 && tt.Size() == 8 {
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op = ssa.OpCvt64Fto32F
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} else {
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s.Fatalf("weird complex conversion %v -> %v", ft, tt)
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}
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ftp := types.FloatForComplex(ft)
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ttp := types.FloatForComplex(tt)
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return s.newValue2(ssa.OpComplexMake, tt,
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s.newValueOrSfCall1(op, ttp, s.newValue1(ssa.OpComplexReal, ftp, v)),
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s.newValueOrSfCall1(op, ttp, s.newValue1(ssa.OpComplexImag, ftp, v)))
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}
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s.Fatalf("unhandled OCONV %s -> %s", ft.Kind(), tt.Kind())
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return nil
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}
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// expr converts the expression n to ssa, adds it to s and returns the ssa result.
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func (s *state) expr(n ir.Node) *ssa.Value {
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if ir.HasUniquePos(n) {
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@ -2510,174 +2679,7 @@ func (s *state) expr(n ir.Node) *ssa.Value {
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case ir.OCONV:
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n := n.(*ir.ConvExpr)
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x := s.expr(n.X)
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ft := n.X.Type() // from type
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tt := n.Type() // to type
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if ft.IsBoolean() && tt.IsKind(types.TUINT8) {
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// Bool -> uint8 is generated internally when indexing into runtime.staticbyte.
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return s.newValue1(ssa.OpCopy, n.Type(), x)
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}
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if ft.IsInteger() && tt.IsInteger() {
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var op ssa.Op
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if tt.Size() == ft.Size() {
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op = ssa.OpCopy
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} else if tt.Size() < ft.Size() {
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// truncation
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switch 10*ft.Size() + tt.Size() {
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case 21:
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op = ssa.OpTrunc16to8
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case 41:
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op = ssa.OpTrunc32to8
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case 42:
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op = ssa.OpTrunc32to16
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case 81:
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op = ssa.OpTrunc64to8
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case 82:
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op = ssa.OpTrunc64to16
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case 84:
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op = ssa.OpTrunc64to32
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default:
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s.Fatalf("weird integer truncation %v -> %v", ft, tt)
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}
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} else if ft.IsSigned() {
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// sign extension
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switch 10*ft.Size() + tt.Size() {
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case 12:
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op = ssa.OpSignExt8to16
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case 14:
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op = ssa.OpSignExt8to32
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case 18:
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op = ssa.OpSignExt8to64
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case 24:
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op = ssa.OpSignExt16to32
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case 28:
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op = ssa.OpSignExt16to64
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case 48:
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op = ssa.OpSignExt32to64
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default:
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s.Fatalf("bad integer sign extension %v -> %v", ft, tt)
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}
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} else {
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// zero extension
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switch 10*ft.Size() + tt.Size() {
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case 12:
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op = ssa.OpZeroExt8to16
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case 14:
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op = ssa.OpZeroExt8to32
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case 18:
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op = ssa.OpZeroExt8to64
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case 24:
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op = ssa.OpZeroExt16to32
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case 28:
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op = ssa.OpZeroExt16to64
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case 48:
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op = ssa.OpZeroExt32to64
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default:
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s.Fatalf("weird integer sign extension %v -> %v", ft, tt)
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}
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}
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return s.newValue1(op, n.Type(), x)
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}
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if ft.IsFloat() || tt.IsFloat() {
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conv, ok := fpConvOpToSSA[twoTypes{s.concreteEtype(ft), s.concreteEtype(tt)}]
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if s.config.RegSize == 4 && Arch.LinkArch.Family != sys.MIPS && !s.softFloat {
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if conv1, ok1 := fpConvOpToSSA32[twoTypes{s.concreteEtype(ft), s.concreteEtype(tt)}]; ok1 {
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conv = conv1
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}
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}
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if Arch.LinkArch.Family == sys.ARM64 || Arch.LinkArch.Family == sys.Wasm || Arch.LinkArch.Family == sys.S390X || s.softFloat {
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if conv1, ok1 := uint64fpConvOpToSSA[twoTypes{s.concreteEtype(ft), s.concreteEtype(tt)}]; ok1 {
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conv = conv1
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}
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}
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if Arch.LinkArch.Family == sys.MIPS && !s.softFloat {
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if ft.Size() == 4 && ft.IsInteger() && !ft.IsSigned() {
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// tt is float32 or float64, and ft is also unsigned
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if tt.Size() == 4 {
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return s.uint32Tofloat32(n, x, ft, tt)
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}
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if tt.Size() == 8 {
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return s.uint32Tofloat64(n, x, ft, tt)
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}
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} else if tt.Size() == 4 && tt.IsInteger() && !tt.IsSigned() {
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// ft is float32 or float64, and tt is unsigned integer
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if ft.Size() == 4 {
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return s.float32ToUint32(n, x, ft, tt)
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}
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if ft.Size() == 8 {
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return s.float64ToUint32(n, x, ft, tt)
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}
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}
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}
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if !ok {
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s.Fatalf("weird float conversion %v -> %v", ft, tt)
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}
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op1, op2, it := conv.op1, conv.op2, conv.intermediateType
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if op1 != ssa.OpInvalid && op2 != ssa.OpInvalid {
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// normal case, not tripping over unsigned 64
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if op1 == ssa.OpCopy {
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if op2 == ssa.OpCopy {
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return x
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}
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return s.newValueOrSfCall1(op2, n.Type(), x)
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}
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if op2 == ssa.OpCopy {
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return s.newValueOrSfCall1(op1, n.Type(), x)
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}
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return s.newValueOrSfCall1(op2, n.Type(), s.newValueOrSfCall1(op1, types.Types[it], x))
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}
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// Tricky 64-bit unsigned cases.
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if ft.IsInteger() {
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// tt is float32 or float64, and ft is also unsigned
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if tt.Size() == 4 {
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return s.uint64Tofloat32(n, x, ft, tt)
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}
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if tt.Size() == 8 {
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return s.uint64Tofloat64(n, x, ft, tt)
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}
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s.Fatalf("weird unsigned integer to float conversion %v -> %v", ft, tt)
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}
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// ft is float32 or float64, and tt is unsigned integer
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if ft.Size() == 4 {
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return s.float32ToUint64(n, x, ft, tt)
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}
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if ft.Size() == 8 {
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return s.float64ToUint64(n, x, ft, tt)
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}
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s.Fatalf("weird float to unsigned integer conversion %v -> %v", ft, tt)
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return nil
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}
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if ft.IsComplex() && tt.IsComplex() {
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var op ssa.Op
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if ft.Size() == tt.Size() {
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switch ft.Size() {
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case 8:
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op = ssa.OpRound32F
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case 16:
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op = ssa.OpRound64F
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default:
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s.Fatalf("weird complex conversion %v -> %v", ft, tt)
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}
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} else if ft.Size() == 8 && tt.Size() == 16 {
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op = ssa.OpCvt32Fto64F
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} else if ft.Size() == 16 && tt.Size() == 8 {
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op = ssa.OpCvt64Fto32F
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} else {
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s.Fatalf("weird complex conversion %v -> %v", ft, tt)
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}
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ftp := types.FloatForComplex(ft)
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ttp := types.FloatForComplex(tt)
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return s.newValue2(ssa.OpComplexMake, tt,
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s.newValueOrSfCall1(op, ttp, s.newValue1(ssa.OpComplexReal, ftp, x)),
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s.newValueOrSfCall1(op, ttp, s.newValue1(ssa.OpComplexImag, ftp, x)))
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}
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s.Fatalf("unhandled OCONV %s -> %s", n.X.Type().Kind(), n.Type().Kind())
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return nil
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return s.conv(n, x, n.X.Type(), n.Type())
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case ir.ODOTTYPE:
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n := n.(*ir.TypeAssertExpr)
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