This change improves the concrete type analysis in the devirtualizer,
it not longer relies on ir.Reassigned, it now statically tries to
determine the concrete type of an interface, even when assigned
multiple times, following type assertions and iface conversions.
Alternative to CL 649195
Updates #69521Fixes#64824
Change-Id: Ib1656e19f3619ab2e1e6b2c78346cc320490b2af
GitHub-Last-Rev: e8fa0b12f0
GitHub-Pull-Request: golang/go#71935
Reviewed-on: https://go-review.googlesource.com/c/go/+/652036
Reviewed-by: Michael Pratt <mpratt@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
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We don't need this argument anymore to match up
a recover with its corresponding panic.
Change-Id: I5d3646cdd766259ee9d3d995a2f215f02e17abc6
Reviewed-on: https://go-review.googlesource.com/c/go/+/685555
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So the position of the wrong assignment statement will be reported,
instead of using incorrect base.Pos one.
Notice while fixing issue #73823.
Change-Id: I53f240bf99d11b5f5082ee4ca0903d9f099881b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/675495
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Reviewed-by: David Chase <drchase@google.com>
This reverts CL 650455 and CL 655816.
Reason for revert: it causes #73747. Properly fixing it gets into
trickiness with defer/recover, wrapper, and inlining. We're late
in the Go 1.25 release cycle.
Fixes#73747.
Change-Id: Ifb343d522b18fec3fec73a7c886678032ac8e4df
Reviewed-on: https://go-review.googlesource.com/c/go/+/678575
Reviewed-by: Carlos Amedee <carlos@golang.org>
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When creating a new *ir.Name or *ir.LinksymOffsetExpr to represent
a composite literal stored in the read-only data section, we should
use the original type of the expression that was found via
ir.ReassignOracle.StaticValue. (This is needed because the StaticValue
method can traverse through OCONVNOP operations to find its final
result.)
Otherwise, the compilation may succeed, but the linker might erroneously
conclude that a type is not used and prune an itab when it should not,
leading to a call at execution-time to runtime.unreachableMethod, which
throws "fatal error: unreachable method called. linker bug?".
The tests exercise both the case of a zero value struct literal that
can be represented by the read-only runtime.zeroVal, which was the case
of the simplified example from #73888, and also modifies that example to
test the non zero value struct literal case.
This CL makes two similar changes for those two cases. We can get either
of the tests we are adding to fail independently if we only make
a single corresponding change.
Fixes#73888
Updates #71359
Change-Id: Ifd91f445cc168ab895cc27f7964a6557d5cc32e5
Reviewed-on: https://go-review.googlesource.com/c/go/+/676517
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
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Remove the 'NoInline' field from CallExpr stucture, as it's no longer
used after enabling of tail call inlining.
Change-Id: Ief3ada9938589e7a2f181582ef2758ebc4d03aad
Reviewed-on: https://go-review.googlesource.com/c/go/+/655816
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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By moving the bit field, we can reduce the miniExpr size by
8 bytes, reducing the sizes of Exprs embedding this type.
Hopefully we get a few types to a lower memory size class.
Change-Id: I4b1d4471cf905f998b26d235980e40ca91446f45
GitHub-Last-Rev: 6dea0bd27c
GitHub-Pull-Request: golang/go#71823
Reviewed-on: https://go-review.googlesource.com/c/go/+/650435
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Nothing ever creates this op, so it can be safely removed. Note that SSA
still intrinsifies runtime.getcallerpc.
The similar ir.OGETCALLERSP is still used for defer handling in
typecheck/func.go:tcRecover.
For #54766.
Change-Id: I6bdb2072af2c068080ae977c0cbd4684d0c7c752
Reviewed-on: https://go-review.googlesource.com/c/go/+/613496
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[Re-land of CL 567695 without further changes.]
This CL refactors the interleaved fixpoint algorithm so that calls can
be inlined in any order. This has no immediate effect, but it will
allow a subsequent CL to prioritize calls by inlheur score.
Change-Id: I8fd6748f0347fd696daee815bf7c9c183572c1ea
Reviewed-on: https://go-review.googlesource.com/c/go/+/573096
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This reverts commit 28e0052ee7.
Reason for revert: #66261
Change-Id: I9dfc8946c41e504c97ecad752971d760ae7a7416
Reviewed-on: https://go-review.googlesource.com/c/go/+/571555
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This CL refactors the interleaved fixpoint algorithm so that calls can
be inlined in any order. This has no immediate effect, but it will
allow a subsequent CL to prioritize calls by inlheur score.
Change-Id: I11a84d228e9c94732ee75f0d3c99bc90d83fea09
Reviewed-on: https://go-review.googlesource.com/c/go/+/567695
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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
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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
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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>
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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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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
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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
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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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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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Start making progress towards constructing IR with proper types.
Change-Id: Iad32c1cf60f30ceb8e07c31c8871b115570ac3bd
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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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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
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Range statement will mutate the key and value, so we should treat them as reassigned.
Fixes#59572
Change-Id: I9c6b67d938760a0c6a1d9739f2737c67af4a3a10
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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
Run-TryBot: shuang cui <imcusg@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Jenny Rakoczy <jenny@golang.org>
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Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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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
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
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
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
