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cmd/compile: don't emit autom's into object file

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Don't write Autom records when writing a function to the object file;
we no longer need them in the linker for DWARF processing. So as to
keep the object file format unchanged, write out a zero-length list of
automs to the object, as opposed to removing all references.

Updates #34554.

Change-Id: I42a1d67207ea7114ae4f3a315cf37effba57f190
Reviewed-on: https://go-review.googlesource.com/c/go/+/197499
Reviewed-by: Jeremy Faller <jeremy@golang.org>
This commit is contained in:
Than McIntosh 2019-09-26 09:53:37 -04:00
parent e72f002ed0
commit cdd59205c4
3 changed files with 14 additions and 57 deletions
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4
src/cmd/internal/obj/link.go
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@ -211,9 +211,6 @@ const (
// A reference to name@GOT(SB) is a reference to the entry in the global offset
// table for 'name'.
NAME_GOTREF
// Indicates auto that was optimized away, but whose type
// we want to preserve in the DWARF debug info.
NAME_DELETED_AUTO
// Indicates that this is a reference to a TOC anchor.
NAME_TOCREF
)
@ -398,7 +395,6 @@ type FuncInfo struct {
Args int32
Locals int32
Text *Prog
Autom []*Auto
Autot map[*LSym]struct{}
Pcln Pcln
InlMarks []InlMark