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[dev.debug] cmd/compile: track variable decomposition in LocalSlot

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When the compiler decomposes a user variable, track its origin so that
it can be recomposed during DWARF generation.

Change-Id: Ia71c7f8e7f4d65f0652f1c97b0dda5d9cad41936
Reviewed-on: https://go-review.googlesource.com/50878
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
This commit is contained in:
Heschi Kreinick 2017-07-21 18:28:06 -04:00
parent 788aa88cd0
commit 2d57d94ac3
6 changed files with 66 additions and 44 deletions
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22
src/cmd/compile/internal/ssa/export_test.go
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@ -82,33 +82,33 @@ func (DummyFrontend) Auto(pos src.XPos, t *types.Type) GCNode {
return &DummyAuto{t: t, s: "aDummyAuto"}
}
func (d DummyFrontend) SplitString(s LocalSlot) (LocalSlot, LocalSlot) {
return LocalSlot{s.N, dummyTypes.BytePtr, s.Off}, LocalSlot{s.N, dummyTypes.Int, s.Off + 8}
return LocalSlot{N: s.N, Type: dummyTypes.BytePtr, Off: s.Off}, LocalSlot{N: s.N, Type: dummyTypes.Int, Off: s.Off + 8}
}
func (d DummyFrontend) SplitInterface(s LocalSlot) (LocalSlot, LocalSlot) {
return LocalSlot{s.N, dummyTypes.BytePtr, s.Off}, LocalSlot{s.N, dummyTypes.BytePtr, s.Off + 8}
return LocalSlot{N: s.N, Type: dummyTypes.BytePtr, Off: s.Off}, LocalSlot{N: s.N, Type: dummyTypes.BytePtr, Off: s.Off + 8}
}
func (d DummyFrontend) SplitSlice(s LocalSlot) (LocalSlot, LocalSlot, LocalSlot) {
return LocalSlot{s.N, s.Type.ElemType().PtrTo(), s.Off},
LocalSlot{s.N, dummyTypes.Int, s.Off + 8},
LocalSlot{s.N, dummyTypes.Int, s.Off + 16}
return LocalSlot{N: s.N, Type: s.Type.ElemType().PtrTo(), Off: s.Off},
LocalSlot{N: s.N, Type: dummyTypes.Int, Off: s.Off + 8},
LocalSlot{N: s.N, Type: dummyTypes.Int, Off: s.Off + 16}
}
func (d DummyFrontend) SplitComplex(s LocalSlot) (LocalSlot, LocalSlot) {
if s.Type.Size() == 16 {
return LocalSlot{s.N, dummyTypes.Float64, s.Off}, LocalSlot{s.N, dummyTypes.Float64, s.Off + 8}
return LocalSlot{N: s.N, Type: dummyTypes.Float64, Off: s.Off}, LocalSlot{N: s.N, Type: dummyTypes.Float64, Off: s.Off + 8}
}
return LocalSlot{s.N, dummyTypes.Float32, s.Off}, LocalSlot{s.N, dummyTypes.Float32, s.Off + 4}
return LocalSlot{N: s.N, Type: dummyTypes.Float32, Off: s.Off}, LocalSlot{N: s.N, Type: dummyTypes.Float32, Off: s.Off + 4}
}
func (d DummyFrontend) SplitInt64(s LocalSlot) (LocalSlot, LocalSlot) {
if s.Type.IsSigned() {
return LocalSlot{s.N, dummyTypes.Int32, s.Off + 4}, LocalSlot{s.N, dummyTypes.UInt32, s.Off}
return LocalSlot{N: s.N, Type: dummyTypes.Int32, Off: s.Off + 4}, LocalSlot{N: s.N, Type: dummyTypes.UInt32, Off: s.Off}
}
return LocalSlot{s.N, dummyTypes.UInt32, s.Off + 4}, LocalSlot{s.N, dummyTypes.UInt32, s.Off}
return LocalSlot{N: s.N, Type: dummyTypes.UInt32, Off: s.Off + 4}, LocalSlot{N: s.N, Type: dummyTypes.UInt32, Off: s.Off}
}
func (d DummyFrontend) SplitStruct(s LocalSlot, i int) LocalSlot {
return LocalSlot{s.N, s.Type.FieldType(i), s.Off + s.Type.FieldOff(i)}
return LocalSlot{N: s.N, Type: s.Type.FieldType(i), Off: s.Off + s.Type.FieldOff(i)}
}
func (d DummyFrontend) SplitArray(s LocalSlot) LocalSlot {
return LocalSlot{s.N, s.Type.ElemType(), s.Off}
return LocalSlot{N: s.N, Type: s.Type.ElemType(), Off: s.Off}
}
func (DummyFrontend) Line(_ src.XPos) string {
return "unknown.go:0"