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[dev.typeparams] cmd/compile: add derived-type dictionaries to unified IR

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This CL updates the unified IR export data serialization to explicitly
and separately record the derived types used by a declaration. The
readers currently just use this data to construct types/IR the same as
before, but eventually we can use it for emitting GC-shape
dictionaries.

Change-Id: I7d67ad9b3f1fbe69664bf19e056bc94f73507220
Reviewed-on: https://go-review.googlesource.com/c/go/+/331829
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Matthew Dempsky 2021-06-28 22:41:50 -07:00
parent 6a5f7e8498
commit f503740ccf
6 changed files with 381 additions and 223 deletions
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32
src/cmd/compile/internal/noder/linker.go
View file

@ -134,11 +134,15 @@ func (l *linker) relocObj(pr *pkgReader, idx int) int {
}
w := l.pw.newEncoderRaw(relocObj)
bside := l.pw.newEncoderRaw(relocObjExt)
assert(bside.idx == w.idx)
wext := l.pw.newEncoderRaw(relocObjExt)
wdict := l.pw.newEncoderRaw(relocObjDict)
l.decls[sym] = w.idx
assert(wext.idx == w.idx)
assert(wdict.idx == w.idx)
l.relocCommon(pr, &w, relocObj, idx)
l.relocCommon(pr, &wdict, relocObjDict, idx)
var obj *ir.Name
if path == "" {
@ -153,18 +157,18 @@ func (l *linker) relocObj(pr *pkgReader, idx int) int {
}
if obj != nil {
bside.sync(syncObject1)
wext.sync(syncObject1)
switch tag {
case objFunc:
l.relocFuncExt(&bside, obj)
l.relocFuncExt(&wext, obj)
case objType:
l.relocTypeExt(&bside, obj)
l.relocTypeExt(&wext, obj)
case objVar:
l.relocVarExt(&bside, obj)
l.relocVarExt(&wext, obj)
}
bside.flush()
wext.flush()
} else {
l.relocCommon(pr, &bside, relocObjExt, idx)
l.relocCommon(pr, &wext, relocObjExt, idx)
}
return w.idx
@ -286,7 +290,17 @@ func (pr *pkgDecoder) peekObj(idx int) (string, string, codeObj, []int) {
bounds := make([]int, r.len())
for i := range bounds {
r.sync(syncType)
bounds[i] = r.reloc(relocType)
if r.bool() {
r.len()
} else {
r.reloc(relocType)
}
// TODO(mdempsky): This result now needs to include the 'derived'
// bool too, but none of the callers currently depend on it
// anyway. Either fix it to be meaningful, or just get rid of it
// altogether.
bounds[i] = -1
}
tag := codeObj(r.code(syncCodeObj))