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cmd/compile: fix naming of decomposed structs

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When a struct is SSAable, we will name its component parts
by their field names.  For example,
type T struct {
     a, b, c int
}
If we ever need to spill a variable x of type T, we will
spill its individual components to variables named x.a, x.b,
and x.c.

Change-Id: I857286ff1f2597f2c4bbd7b4c0b936386fb37131
Reviewed-on: https://go-review.googlesource.com/21389
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Keith Randall 2016-03-31 21:24:10 -07:00
parent 6c6089b3fd
commit b04e145248
7 changed files with 97 additions and 58 deletions
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3
src/cmd/compile/internal/ssa/export_test.go
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@ -48,6 +48,9 @@ func (d DummyFrontend) SplitComplex(s LocalSlot) (LocalSlot, LocalSlot) {
}
return LocalSlot{s.N, d.TypeFloat32(), s.Off}, LocalSlot{s.N, d.TypeFloat32(), s.Off + 4}
}
func (d DummyFrontend) SplitStruct(s LocalSlot, i int) LocalSlot {
return LocalSlot{s.N, s.Type.FieldType(i), s.Off + s.Type.FieldOff(i)}
}
func (DummyFrontend) Line(line int32) string {
return "unknown.go:0"
}