Add a new helper type 'ReassignOracle', useful for doing "batch mode"
reassignment analysis, e.g. deciding whether a given ir.Name or (chain
of connected names) has a single definition and is never reassigned.
The intended usage model is for clients to create/initialize a
ReassignOracle for a given function, then make a series of queries
using it (with the understanding that changing/mutating the func body
IR can invalidate the info cached in the oracle). This oracle is
intended to provide the same sort of analysis that ir.StaticValue and
ir.Reassigned carry out, but at a much reduced cost in compile
time.
Notes:
- the new helper isn't actually used for anything useful in this
patch; it will be hooked into the inline heuristics code as part of
a subsequent CL.
- this is probably not an ideal long-term solution; it would be better
to switch to a scheme based a flag on ir.Name, as opposed to a
side table.
Change-Id: I283e748e440a9f595df495f6aa48ee9c498702d9
Reviewed-on: https://go-review.googlesource.com/c/go/+/539319
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
The devirtualizer and inliner both want to recognize call expressions
that are part of a go or defer statement. This CL refactors them to
use a single CallExpr.GoDefer flag, which gets set during
normalization of go/defer statements during typecheck.
While here, drop some OCALLMETH assertions. Typecheck has been
responsible for desugaring them into OCALLFUNC for a while now, and
ssagen will check this again for us later anyway.
Change-Id: I3fc370f4417431aae97239313da6fe523f512a2e
Reviewed-on: https://go-review.googlesource.com/c/go/+/543657
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Signed-off-by: Park Zhou <ideapark@139.com>
Change-Id: I5e42ca6c714b9c1b50241c9d738db366bf1ca1fa
Reviewed-on: https://go-review.googlesource.com/c/go/+/542175
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Today, the PGO IR graph only contains entries for ir.Func loaded into
the package. This can include functions from transitive dependencies,
but only if they happen to be referenced by something in the current
package. If they are not referenced, noder never bothers to load them.
This leads to a deficiency in PGO devirtualization: some callee methods
are available in transitive dependencies but do not devirtualize because
they happen to not get loaded from export data.
Resolve this by adding an explicit lookup from export data of callees
mentioned in the profile.
I have chosen to do this during loading of the profile for simplicity:
the PGO IR graph always contains all of the functions we might need.
That said, it isn't strictly necessary. PGO devirtualization could do
the lookup lazily if it decides it actually needs a method. This saves
work at the expense of a bit more complexity, but I've chosen the
simpler approach for now as I measured the cost of this as significantly
less than the rest of PGO loading.
For #61577.
Change-Id: Ieafb2a549510587027270ee6b4c3aefd149a901f
Reviewed-on: https://go-review.googlesource.com/c/go/+/497175
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Reviewed-by: Cherry Mui <cherryyz@google.com>
Mostly a reorganization to make further changes easier.
This reorganization will make it easier to add a cache in front
of the runtime call.
Leave the old code alone for dynamic type assertions (aka generics).
Change-Id: Ia7dcb7aeb1f63baf93584ccd792e8e31510e8aea
Reviewed-on: https://go-review.googlesource.com/c/go/+/529196
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
CallExpr.X -> CallExpr.Fun
This consistent with go/ast and cmd/compile/internal/syntax.
OPRINTN -> OPRINTLN
This op represents the "println" builtin; might as well spell it the
same way.
Change-Id: Iead1b007776658c717879cf0997b3c48028428f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/532795
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
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Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Add compiler support for range over functions.
See the large comment at the top of
cmd/compile/internal/rangefunc/rewrite.go for details.
This is only reachable if GOEXPERIMENT=range is set,
because otherwise type checking will fail.
For proposal #61405 (but behind a GOEXPERIMENT).
For #61717.
Change-Id: I05717f94e63089c503acc49b28b47edeb4e011b4
Reviewed-on: https://go-review.googlesource.com/c/go/+/510541
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Auto-Submit: Russ Cox <rsc@golang.org>
The "eface" in OEFACE suggests it's only for empty interfaces, and the
documentation suggests that too. But it's actually used for both empty
and non-empty interfaces, so rename to OMAKEFACE and adjust docs
accordingly.
Also, remove OCONVIDATA. This was used by the 1.18 frontend for
constructing interfaces containing derived types, but the unified
frontend always uses OCONVIFACE instead, so this is unused now.
Change-Id: I6ec5c62f909b26027f2804e5b3373b7a00029246
Reviewed-on: https://go-review.googlesource.com/c/go/+/527336
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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These are no longer needed after the previous CL, which moved handling
of unsafe.Sizeof, etc. directly into the unified frontend.
Change-Id: Ieb35ffca0bc25319e58132fb5d035c5b441acea7
Reviewed-on: https://go-review.googlesource.com/c/go/+/527098
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
This CL adds an explicit Type parameter to NewBasicLit so that callers
can directly construct typed OLITERAL nodes.
Change-Id: I0ab50ac3d7ddb7adcc903633a62ac496921165e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/527096
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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The OrigNode functionality used to be relevant to the typecheck
frontend, because we wanted to report errors using the same syntax as
the user originally wrote. However, now that types2 handles all
spec-required error diagnostics, there's no need to preserve original
nodes anymore.
Change-Id: I64a0540b8952513913021e7b84d165beb1f9f801
Reviewed-on: https://go-review.googlesource.com/c/go/+/526397
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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OrigNode will be going away soon, which is the only reason for
ConstExpr to exist. Otherwise, it's identical to BasicLit.
To keep existing code working, change NewConstExpr to construct and
return a BasicLit instead.
Change-Id: I68b43ec1fcaa57e6723f289ce9f953996aeefb14
Reviewed-on: https://go-review.googlesource.com/c/go/+/526395
Reviewed-by: Keith Randall <khr@google.com>
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Auto-Submit: Matthew Dempsky <mdempsky@google.com>
One of the more tedious quirks of the original frontend (i.e.,
typecheck) to preserve was that it preserved the original
representation of constants into the backend. To fit into the unified
IR model, I ended up implementing a fairly heavyweight workaround:
simply record the original constant's string expression in the export
data, so that diagnostics could still report it back, and match the
old test expectations.
But now that there's just a single frontend to support, it's easy
enough to just update the test expectations and drop this support for
"raw" constant expressions.
Change-Id: I1d859c5109d679879d937a2b213e777fbddf4f2f
Reviewed-on: https://go-review.googlesource.com/c/go/+/526376
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
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This formatting used to be relevant to user error diagnostics and
(much earlier) even to the old textual export data format, but now
it's only relevant to backend debugging. So we can simplify a lot,
adjusting a few test expectations accordingly.
Change-Id: Ibe8e029284ce6150bfa24ef794d8d9eff66dbdea
Reviewed-on: https://go-review.googlesource.com/c/go/+/526375
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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In CL 522879, I moved the logic for setting Addrtaken from typecheck's
markAddrOf and ComputeAddrtaken directly into ir.NewAddrExpr. However,
I took the logic from markAddrOf, and failed to notice that
ComputeAddrtaken also set Addrtaken on the canonical ONAME.
The result is that if the only address-of expressions were within a
function literal, the canonical variable never got marked Addrtaken.
In turn, this could cause the consistency check in ir.Reassigned to
fail. (Yay for consistency checks turning mistakes into ICEs, rather
than miscompilation.)
Fixes#62313.
Change-Id: Ieab2854cd7fcc1b6c5d1e61de66453add9890a4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/523375
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
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This CL changes NewAddrExpr to require its operand to always be
typechecked, so it can return an appropriately typechecked node and
mark Addrtaken as appropriate in the process.
Change-Id: I97c1f29305a9abfda35c42a43561c4c15fb5b52e
Reviewed-on: https://go-review.googlesource.com/c/go/+/522879
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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This CL removes a lot of the redundant methods for accessing struct
fields and signature parameters. In particular, users never have to
write ".Slice()" or ".FieldSlice()" anymore; the exported APIs just do
what you want.
Further internal refactorings to follow.
Change-Id: I45212f6772fe16aad39d0e68b82d71b0796e5639
Reviewed-on: https://go-review.googlesource.com/c/go/+/521295
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As of this CL, all OLITERAL, OLINKSYMOFFSET, ONIL, and OTYPE nodes are
constructed as typed and typechecked.
Change-Id: I39b2ad772a9b0419c701890a505a0949f9ea456e
Reviewed-on: https://go-review.googlesource.com/c/go/+/520795
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Except for a single call site in escape analysis, every use of
ir.AsNode involves a types.Object that's known to contain
an *ir.Name. Asserting directly to that type makes the code simpler
and more efficient.
The one use in escape analysis is extended to handle nil correctly
without it.
Change-Id: I694ae516903e541341d82c2f65a9155e4b0a9809
Reviewed-on: https://go-review.googlesource.com/c/go/+/520775
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
These were only ever used by the pre-unified generics frontend. I
initially kept them because I thought they'd be useful for the unified
frontend eventually too, but that hasn't manifested.
Change-Id: Iaa31a76ac4d62533ec269d2a7141442b8e344180
Reviewed-on: https://go-review.googlesource.com/c/go/+/520608
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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Start making progress towards constructing IR with proper types.
Change-Id: Iad32c1cf60f30ceb8e07c31c8871b115570ac3bd
Reviewed-on: https://go-review.googlesource.com/c/go/+/520263
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This CL extends ir.StaticValue to also work on closure variables.
Also, it extracts the code from escape analysis that's responsible for
determining the static callee of a function. This will be useful when
go/defer statement normalization is moved to typecheck.
Change-Id: I69e1f7fb185658dc9fbfdc69d0f511c84df1d3ac
Reviewed-on: https://go-review.googlesource.com/c/go/+/518959
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Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Rename the ir-local function "reassigned" to "Reassigned" so that it
can be used as part of inline heuristic analysis. Fix up the header
comment along that way, which had some stale material. Add support for
detecting reassignments via OASOP (as opposed to just simple
assignments).
Updates #61502.
Change-Id: I50f40f81263c0d7f61f30fcf0258f0b0f93acdca
Reviewed-on: https://go-review.googlesource.com/c/go/+/511560
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Range statement will mutate the key and value, so we should treat them as reassigned.
Fixes#59572
Change-Id: I9c6b67d938760a0c6a1d9739f2737c67af4a3a10
Reviewed-on: https://go-review.googlesource.com/c/go/+/483855
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Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Fixes the misuse of "a" vs "an", according to English grammatical
expectations and using https://www.a-or-an.com/
Change-Id: I53ac724070e3ff3d33c304483fe72c023c7cda47
Reviewed-on: https://go-review.googlesource.com/c/go/+/480536
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After CL 436435 chain, the only case left where we create an ONAME node
with nil Func is interface method from imported package.
Change-Id: I9d9144916d01712283f2b116973f88965715fea3
Reviewed-on: https://go-review.googlesource.com/c/go/+/468816
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Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
To clear map, and zero content of slice.
Updates #56351
Change-Id: I5f81dfbc465500f5acadaf2c6beb9b5f0d2c4045
Reviewed-on: https://go-review.googlesource.com/c/go/+/453395
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Reviewed-by: Keith Randall <khr@golang.org>
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The conversion T(x) is implemented as *(*T)(x). Accordingly, runtime
panic messages for (*T)(x) are made more general.
Fixes#46505.
Change-Id: I76317c0878b6a5908299506d392eed50d7ef6523
Reviewed-on: https://go-review.googlesource.com/c/go/+/430415
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Reviewed-by: Jenny Rakoczy <jenny@golang.org>
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Neither are currently used. These concepts only need to exist
in the ssa backend (as ssa.OpVarDef and ssa.OpVarLive).
Change-Id: I8d6bd14aa7967b2156e5e9a103b95146e5552f36
Reviewed-on: https://go-review.googlesource.com/c/go/+/419319
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
As it can't appear in user package paths.
There is a hack for handling "go:buildid" and "type:*" on windows/386.
Previously, windows/386 requires underscore prefix on external symbols,
but that's only applied for SHOSTOBJ/SUNDEFEXT or cgo export symbols.
"go.buildid" is STEXT, "type.*" is STYPE, thus they are not prefixed
with underscore.
In external linking mode, the external linker can't resolve them as
external symbols. But we are lucky that they have "." in their name,
so the external linker see them as Forwarder RVA exports. See:
- https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#export-address-table
- https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=ld/pe-dll.c;h=e7b82ba6ffadf74dc1b9ee71dc13d48336941e51;hb=HEAD#l972)
This CL changes "." to ":" in symbols name, so theses symbols can not be
found by external linker anymore. So a hacky way is adding the
underscore prefix for these 2 symbols. I don't have enough knowledge to
verify whether adding the underscore for all STEXT/STYPE symbols are
fine, even if it could be, that would be done in future CL.
Fixes#37762
Change-Id: I92eaaf24c0820926a36e0530fdb07b07af1fcc35
Reviewed-on: https://go-review.googlesource.com/c/go/+/317917
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OMAPLIT gets lowered into a bunch of OINDEXMAP operations, which in
general may require a *runtime._type argument. This CL adds
CompLitExpr.RType, updates the GOEXPERIMENT=unified frontend to start
setting it, and updates walk to propagate it through to any generated
OINDEXMAP operations.
Change-Id: I278e7e8e615ea6d01f65a5eba6d6fc8e00045735
Reviewed-on: https://go-review.googlesource.com/c/go/+/413360
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This CL adds RType/ITab fields to IR nodes that (may) ultimately
become runtime calls that require a *runtime._type or *runtime.itab
argument. It also updates the corresponding reflectdata IR helpers to
use these fields in preference of calling TypePtr/ITabAddr.
Subsequent CLs will start updating the GOEXPERIMENT=unified frontend
to set the RType fields, and incrementally switch the reflectdata
helpers to require them.
Passes toolstash -cmp.
Change-Id: I30e31d91f0a53961e3d6d872d7b5f9df2ec5074c
Reviewed-on: https://go-review.googlesource.com/c/go/+/413358
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This CL adds alternate code paths for the frontend to plumb through
rtypes to package ssagen, so the latter doesn't have to use
reflectType (which in general will only have access to shape types).
Note: This CL doesn't yet plumb through the rtypes for variables that
escape to the heap. However, those rtypes are only used for calling
runtime.newobject, and the status quo as of Go 1.18 is already to use
shape rtypes for most runtime.newobject calls. (Longer term though, I
would like to get rid of shape rtypes altogether.)
Passes toolstash -cmp.
Updates #53276.
Change-Id: I76a281eca8300de2e701fbac89ead32f8568a5f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/413357
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Rename DynamicType's "X" field to "RType".
Split DynamicTypeAssertExpr's "T" field into "RType" and "ITab", the
same as DynamicType, updating all uses accordingly.
Change-Id: I8cec8171349c93234a10ac50708f800dee6fb1d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/405334
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Historically, the compiler used to use a name node to represent "nil".
Now, "nil" is represented by NilExpr, so it's not necessary to associate
a Sym with it anymore.
Passes toolstash-check.
Change-Id: Ied1ddefa06ea55ada18ca52c8fcf71defa4c23b2
Reviewed-on: https://go-review.googlesource.com/c/go/+/406174
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Reviewed-by: Heschi Kreinick <heschi@google.com>
Ident, ParenExpr, SelectorExpr, and StarExpr used to need to be
allowed as Ntypes for the old -G=0 type checker to represent some type
expressions before type checking, but now they're only ever used to
represent value expressions.
Change-Id: Idd4901ae6149ecc81acf1c52de3bc914d9e73418
Reviewed-on: https://go-review.googlesource.com/c/go/+/403844
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Reviewed-by: David Chase <drchase@google.com>
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Type arguments are always type expressions, which are semantically
represented by Ntype.
In fact, the slice should probably just be []*types.Type instead, and
that would remove a lot of ir.TypeNode wrapping/unwrapping. But this
lead to issues within the stenciling code, and I can't immediately
make sense why.
Change-Id: Ib944db30e4d21284bc2d8d954b68ecb70b4205a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/403843
Reviewed-by: David Chase <drchase@google.com>
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As with ir.CompLitExpr.Ntype, there's no need for
ir.TypeAssertExpr.Ntype in a pure-types2 world.
Change-Id: Iff48c98330f072fd6b26099e13a19c56adecdc42
Reviewed-on: https://go-review.googlesource.com/c/go/+/403842
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It's no longer needed, since type expressions are all evaluated by
types2. We can just use Node.Type instead.
Change-Id: If523bd96f96fc4f2337a26f563f84e4f194e654a
Reviewed-on: https://go-review.googlesource.com/c/go/+/403841
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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All callers were already using TypeNode to get an Ntype anyway, so
just push the TypeNode constructor down into NewCompLitExpr. Prep
refactoring for next CL to remove the Ntype field.
Change-Id: I671935afca707aaab11d1c46e39902bd37a485ba
Reviewed-on: https://go-review.googlesource.com/c/go/+/403840
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[This CL is part of a sequence implementing the proposal #51082.
The design doc is at https://go.dev/s/godocfmt-design.]
Run the updated gofmt, which reformats doc comments,
on the main repository. Vendored files are excluded.
For #51082.
Change-Id: I7332f099b60f716295fb34719c98c04eb1a85407
Reviewed-on: https://go-review.googlesource.com/c/go/+/384268
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
A run of lines that are indented with any number of spaces or tabs
format as a <pre> block. This commit fixes various doc comments
that format badly according to that (standard) rule.
For example, consider:
// - List item.
// Second line.
// - Another item.
Because the - lines are unindented, this is actually two paragraphs
separated by a one-line <pre> block. This CL rewrites it to:
// - List item.
// Second line.
// - Another item.
Today, that will format as a single <pre> block.
In a future release, we hope to format it as a bulleted list.
Various other minor fixes as well, all in preparation for reformatting.
For #51082.
Change-Id: I95cf06040d4186830e571cd50148be3bf8daf189
Reviewed-on: https://go-review.googlesource.com/c/go/+/384257
Trust: Russ Cox <rsc@golang.org>
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This reverts commit e550c30545.
Reason for revert: Method bound calls are no longer implemented using interface calls, so it is no longer necessary. Leaving the test, though.
Change-Id: I80f1e4cd921063cd27ca8f07998316ca282e075b
Reviewed-on: https://go-review.googlesource.com/c/go/+/395594
Trust: Keith Randall <khr@golang.org>
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The only usage of NewClosureExpr is inside NewClosureFunc, which is its
alternative version. So just remove NewClosureExpr and inline it there.
Change-Id: I1900f4fbb48d7b4f6e6a857f7f7760cd27302671
Reviewed-on: https://go-review.googlesource.com/c/go/+/395855
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Than McIntosh
Ville Skyttä
Matthew Dempsky
Park Zhou
Michael Pratt
Keith Randall
Russ Cox
Junwei Zuo
cui fliter
Cuong Manh Le
cuiweixie