The new go/analysis/cmd/vet tool found a few issues. Fix them by
explicitly ignoring results where needed and renaming examples in
accordance to package testing's guidelines to make them appear on the
godoc pages.
This change doesn't touch go/ssa/interp/external.go because the
possible misuse of package unsafe there looks intentional.
Change-Id: Id63109e3797818a5e869fe8ed1bc1476959541f2
Reviewed-on: https://go-review.googlesource.com/c/147297
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Alan Donovan <adonovan@google.com>
For some reason, the type of the last Param in a wrapper function
for a variadic method (T) f(...U) had type [][]U instead of []U.
(Possibly a workaround for a long-since fixed bug in go/types?)
Added a sanity check to ensure that the common suffix of
fn.Params and fn.Signature.Params match in type.
Fixesgolang/go#27453
Change-Id: I9506f4f67a7ff3a283e9ec0142f638aad00287a9
Reviewed-on: https://go-review.googlesource.com/134515
Reviewed-by: Robert Griesemer <gri@golang.org>
In cmd/present, a mode was being passed to the function parse, but it
wasn't actually being used. Use it.
In go/ssa, checkFinalInstr received an idx integer but it doesn't
actually need it. Get rid of it.
Lastly, in imports, findImportStdlib always returned rename==false. Get
rid of that result parameter.
Change-Id: I719006b69ee80a3ef4b0ea24c1c206016a7e304b
Reviewed-on: https://go-review.googlesource.com/93596
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
https://go-review.googlesource.com/37157 introduced a bug that caused
some live φ-nodes to be removed from the CFG. The cause was that
reachability traversal considered edges only among "new" φ-nodes
(those introduced during SSA renaming) but not existing φ-nodes from
&& and || expressions. The fix is to mark existing phis, and thus
other phis reachable from them, as live. We also clear the Phi.block
field when eliminating a φ-node.
Also, during reachability, we treat DebugRef instructions as roots
like any other non-Phi instruction. This eliminates a related known
bug whereby the operand of a DebugRef may be a dead φ.
This change also adds a sanity check that all operands of an SSA value
that are themselves instructions must belong to a block. The sanity
check would fail 7 times on the standard library without the fix.
Fixesgolang/go#19622
Change-Id: If3a897a6a593a17bc3f0f8228d1edf483be7a3d0
Reviewed-on: https://go-review.googlesource.com/45832
Run-TryBot: Dominik Honnef <dominik@honnef.co>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Dominik Honnef <dominik@honnef.co>
Details:
- remove go1.5 "default version" labels on most files
- remove go1.6 labels on a few files
- go/loader: use conf.Cwd not "." in a couple places; update faulty
test expectations. (Not sure why this wasn't caught sooner.)
- go/ssa/interp: add 'mono' result to time.now intrinsic
- go/gcimporter15/bimport.go: make consistent with the version in gc
- go/ssa/interp: update test error message
- go/ssa: update a comment
The go/gcimporter15/bexport.go logic is stale and needs to be brought
up to date. Needs a separate CL since it's tricky.
Tested on go1.6, go1.7, go1.8.
Change-Id: I841189d30e131b7c49a4e8690ea7c40b55041bae
Reviewed-on: https://go-review.googlesource.com/36540
Reviewed-by: Robert Griesemer <gri@golang.org>
A few files have been forked and tagged "go1.5,!go1.6" to work around
minor API changes between the two types packages:
- constant.Value.String() in oracle/describe.go and its tests;
- constant.ToInt must now be called before constant.Int64Val.
- types.Config{Importer: importer.Default()} in a number of places
- go/types/typeutil/import_test.go uses lowercase names to avoid 'import "C"'.
Files in go/types/typesutil, missing from my previous CL, have been
tagged !go1.5; these files will be deleted in February.
All affected packages were tested using 1.4.1, 1.5, and ~1.6 (tip).
Change-Id: Iec7fd370e1434508149b378438fb37f65b8d2ba8
Reviewed-on: https://go-review.googlesource.com/18207
Reviewed-by: Robert Griesemer <gri@golang.org>
This change will ensure that the tree continues to work with go1.4.1.
All files continue to depend on golang.org/x/tools/go/types, but in a
follow-up change, I will switch the primary files to depend on the
standard go/types package. Another (smaller) set of files will be
forked and tagged, this time !1.6, due to API differences between the
two packages.
All tests pass using 1.4.1, 1.5, and ~1.6 (tip).
Change-Id: Ifd75a6330e120957d646be91693daaba1ce0e8c9
Reviewed-on: https://go-review.googlesource.com/18333
Reviewed-by: Robert Griesemer <gri@golang.org>
Before this change, declared init functions were not package members;
this choice dates from when go/types did not create Func objects for them.
Now, they have an Object. They appear in Members, keyed by "init#%d"
(sequence number) for uniqueness. They can be enumerated. They can
be looked up from a *types.Func via (*Program).FuncValue.
Caveat: fn.Object.Name() no longer equals fn.Name() in all cases.
NB: incompatible API change! (Your build will not break though.)
Change-Id: I2de873079fd57329e6c2f55a282940f6699a77a1
Reviewed-on: https://go-review.googlesource.com/6950
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Peter Collingbourne <pcc@google.com>
Rewrite performed with this command:
sed -i '' 's_code.google.com/p/go\._golang.org/x/_g' \
$(grep -lr 'code.google.com/p/go.' *)
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/170920043
This extends the sanity checker to identify and report referrers
which do not appear in the function's instruction lists, and fixes two
bugs in the lifting algorithm which were caught by the sanity check.
LGTM=adonovan
R=adonovan
CC=axwalk, golang-codereviews
https://golang.org/cl/110210045
Blocks dominated by "if false" should be retained in the
initial SSA form so they remain visible to subsequent source
code analysis tools.
In any case, true compilers already need a stronger version of
this optimization so they can simplify CFGs such as this:
const x, y = ...
switch x {case y:...}
where a branch is constant but the comparison of constants
does not occur within an expression.
LGTM=gri
R=gri
CC=golang-codereviews, pcc
https://golang.org/cl/101250043
Also:
- extend Parent() to all Values and add to interface:
(Builtin/Const/Global => nil; Function => Enclosing)
- hide Function.Enclosing since it's now redundant wrt Parent()
- make (*Function).String robust for synthetics without pkg object
LGTM=gri
R=gri
CC=golang-codereviews, khr
https://golang.org/cl/87580044
Until now, the same Function was used to represent a method
(T)func() and the "method expression" function func(T) formed
from it. So the SSA code for this:
var buf bytes.Buffer
f := Buffer.Bytes
f(buf)
buf.Bytes()
would involve an implicit cast (ChangeType) on line 2.
However, compilers based on go/ssa may want to use different
calling conventions for them, like gccgo does (see issue
7839). This change decouples them by using an anonymous
function called a "thunk", rather like this:
f := func(r *bytes.Buffer) []byte { return r.Bytes() }
Thunks are similar to method wrappers; both are created by
makeWrapper.
"Interface method wrappers" were a special case of thunks for
direct calls (no indirection/fields) of interface methods.
They are now subsumed by thunks and have been deleted. Now
that only the needed thunks are built, we don't need to
populate the concrete method sets of interface types at all,
so (*Program).Method and LookupMethod return nil for them.
This results in a slight reduction in function count (>1%) and
instruction count (<<1%).
Details:
go/ssa:
- API: ChangeType no longer supports func/method conversions.
- API: (*Program).FuncValue now returns nil for abstract
(interface) methods.
- API: (*Function).RelString simplified.
"$bound" is now a suffix not a prefix, and the receiver
type is rendered package-relative.
- API: Function.Object is now defined for all wrappers too.
- API: (*Program).Method and LookupMethod return nil for
abstract methods.
- emitConv no longer permits (non-identical)
Signature->Signature conversions. Added assertion.
- add and use isInterface helper
- sanity: we check packages after Build, not Create, otherwise
cross-package refs might fail.
go/pointer:
- update tests for new function strings.
- pointer_test: don't add non-pointerlike probes to analysis.
(The error was checked, but too late, causing a panic.)
- fixed a minor bug: if a test probe print(x) was the sole
reference to x, no nodes were generated for x.
- (reflect.Type).MethodByName: updated due to ssa API changes.
Also, fixed incorrect testdata/funcreflect.go expectation
for MethodByName on interfaces.
oracle:
- fix for new FuncValue semantics.
- a "pointsto" query on an I.f thunk now returns an error.
Fixesgolang/go#7839
LGTM=gri
R=gri
CC=golang-codereviews, pcc
https://golang.org/cl/93780044
This is (a) more efficient and (b) avoids the need for
constant error handling, since buffer writes can't fail.
Also:
- added WriteFunction and WritePackage functions,
similar to types.WriteFoo.
- *Function and *Package now implement io.WriterTo.
LGTM=gri
R=gri
CC=golang-codereviews
https://golang.org/cl/57930044
Ainar Garipov
Alan Donovan
Daniel Martí
Andrew Gerrand
Peter Collingbourne