Fix comments, including duplicate is, wrong phrases and articles, misspellings, etc.
Change-Id: I8bfea53b9b275e649757cc4bee6a8a026ed9c7a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/493035
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: shuang cui <imcusg@gmail.com>
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Pass type checker error codes to base.ErrorfAt function calls
in the compiler (but don't do anything yet with the code).
Also, provide error codes to base.ErrorfAt calls in the
compiler as needed.
This opens the door towards reporting the error code and/or
providing a link/reference to more detailed explanations
(see internal/types/errors/codes.go).
Change-Id: I0ff9368d8163499ffdac6adfe8331fdc4a19b4b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/475198
Reviewed-by: Robert Griesemer <gri@google.com>
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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>
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Change-Id: I69065f8adf101fdb28682c55997f503013a50e29
Reviewed-on: https://go-review.googlesource.com/c/go/+/449757
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Joedian Reid <joedian@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
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After CL 22425, there're two optimizations for slice expr which are
never applied during walk pass:
s[i:len(s)]
s[i:j:cap(s)]
The order pass have already rewritten len/cap expression to use autotmp,
thus the same safe expression check will never fire. The code can now be
simplified by moving the only case left from reduceSlice to walkSlice,
then removing reduceSlice entirely.
Passes toolstash-check.
Change-Id: Ia8cfb15c8e96c186a214c17b42d0fee51b0d3a1c
Reviewed-on: https://go-review.googlesource.com/c/go/+/432695
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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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Since when any user errors about out-of-bounds constants should have
been already reported by types2.
Change-Id: I81b6bfec53201bbf546c48157fc8154cdb3c6e45
Reviewed-on: https://go-review.googlesource.com/c/go/+/421876
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Reviewed-by: David Chase <drchase@google.com>
This CL removes (almost*) all reflectdata.{TypePtr,ITabAddr} calls
from package walk. This will allow us to next start adding RType/ITab
fields to IR nodes directly, and have the helpers start returning them
when available instead.
The one survining ITabAddr call is due to ODOTTYPE{,2}, but we already
have ODYNAMICDOTTYPE{,2}, which I plan to have Unified IR always
use. (Longer term, once the Go 1.18 frontend is gone, we can get rid
of ODOTTYPE*, and rename ODYNAMICDOTTYPE*.)
Passes toolstash -cmp.
Change-Id: I5e00da06a93d069abf383d7628e692dd7fd2a1c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/413356
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IR string compares as well as calls to string comparison functions such
as `strings.EqualFold` are intercepted and the corresponding libFuzzer
callbacks are invoked with the corresponding arguments. As a result, the
compared strings will be added to libFuzzer’s table of recent compares,
which feeds future mutations performed by the fuzzer and thus allow it
to reach into branches guarded by string comparisons.
The list of methods to intercept is maintained in
`cmd/compile/internal/walk/expr.go` and can easily be extended to cover
more standard library functions in the future.
Change-Id: I5c8b89499c4e19459406795dea923bf777779c51
GitHub-Last-Rev: 6b8529b555
GitHub-Pull-Request: golang/go#51319
Reviewed-on: https://go-review.googlesource.com/c/go/+/387335
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
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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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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>
So all runtime map functions will use the same code path, make it easier
for future CL to handle stack object for map key.
Passes toolstash -cmp.
For #43753
Change-Id: I374fa4e351c1eba079e2ccb637b1ef5adad1488f
Reviewed-on: https://go-review.googlesource.com/c/go/+/321713
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The fieldtrack support is experimental and used mainly inside Google,
where we have included this change for years. No reason not to make
it in the public copy.
Change-Id: I5233e4e775ccce60a17098c007aed8c82a0425d7
Reviewed-on: https://go-review.googlesource.com/c/go/+/387355
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To capture the fact that a method was called on a generic interface,
so we can make sure the linker doesn't throw away any implementations
that might be the method called.
See the comment in reflect.go for details.
Fixes#49049
Change-Id: I0be74b6e727c1ecefedae072b149f59d539dc1e9
Reviewed-on: https://go-review.googlesource.com/c/go/+/357835
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We currently make dictionaries contain a relocation pointing to
methods that generic code might use, so that those methods are not
deadcode eliminated. However, with inlining we can end up not using
the dictionary, making the reference from the dictionary to the method
no longer keep the method alive.
Fix this by keeping the dictionary alive at generic interface call sites.
It's a bit of overkill, as we only need to keep the dictionary statically
alive. We don't actually need it dynamically alive, which is what KeepAlive
does. But it works. It ends up generating a LEAQ + stack spill that aren't
necessary, but that's pretty low overhead.
To make this work, I needed to stop generating methods on shape types.
We should do this anyway, as we shouldn't ever need them. But currently
we do use them! issue44688.go has a test that only works because it calls
a method on a shape type. I've disabled that test for now, will work on it
in a subsequent CL.
Fixes#48047
Change-Id: I78968868d6486c1745f51b8b43be0898931432a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/349169
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This is followup of CL 343972, moving the checkptr alignment
instrumentation during SSA generation instead of walk.
Change-Id: I29b2953e4eb8631277fe2e0f44b9d987dd7a69f9
Reviewed-on: https://go-review.googlesource.com/c/go/+/345430
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The checkptr instrumentation is currently inserted before slice
operation has validated that n <= Big. So instead of panic, checkptr
have false positive throws.
To fix this, just insert the checkptr instrumentation after the bound
checking during SSA generation.
Fixes#46938
Change-Id: I9dbf84441c711842ccc883f3654ca8766ac696d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/343972
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Simplify the implementation of interface conversions in the compiler.
Don't pass fields that aren't needed (the data word, usually) to the runtime.
For generics, we need to put a dynamic type in an interface. The new
dataWord function is exactly what we need (the type word will come
from a dictionary).
Change-Id: Iade5de5c174854b65ad248f35c7893c603f7be3d
Reviewed-on: https://go-review.googlesource.com/c/go/+/340029
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Introduce new dynamic dottype operations which take a dynamic
instead of static type to convert to.
Change-Id: I5824a1fea056fe811b1226ce059e1e8da1baa335
Reviewed-on: https://go-review.googlesource.com/c/go/+/337609
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This operation computes just the data field needed to put its argument
into an interface. Used by generics because we produce the type field
of an interface using dictionaries (instead of statically).
With this operation defined, we can now assert that shape types
are never marked as used in interfaces (the only previous use
was IDATA(CONVIFACE(t))).
Change-Id: Idb1eb5f3b238285cb99413d382599c0621b7681a
Reviewed-on: https://go-review.googlesource.com/c/go/+/337109
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CL 330670 simplified usemethod, but dropped the previous condition to
ensure the function have 1 or 2 result. This CL restore that condition,
and also add a test for it.
Change-Id: I434e3736785b43ceea0b386d8d9d01ad78a4ccd2
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Go spec call them "method values", not "partial calls". Note that
we use "OMETHVALUE" (as opposed to "OMETHODVALUE") to be consistent
with "OMETHEXPR".
Change-Id: I1efd985d4b567a1b4b20aeb603eb82db579edbd5
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CL 330671 move rewriting method call to method expression to escape
analysis. This CL move the rewriting up further, into typecheck. It
helps simplify the code for dowstream passes, as they now only have to
deal with OCALLFUNC.
There're two notes:
- For -G=3, we can't rewrite d.M() where d is an instantiated receiver
in transformCall, but let irgen.stencil to rewrite it.
- Escape analysis still have to check for rewriting method calls, as
the devirtualization pass can still generate OCALLMETH.
Does not pass toolstash, since when the export data now contains method
expression calls instead of method calls.
Change-Id: I77465ef04d50dc4efedddca7eb55b3fc9483db0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/330831
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Since when walkCall1 still need to handle OCALLMETH.
Change-Id: Iadb12a0965169c63f97978c96412012ef4fa02df
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CL 330331 extended escape analysis to analyze method expression calls
the same as normal method calls. We can now simply desugar method calls
into function calls in escape analysis.
To do this, two things must be changed:
- Folding the rewrite method call to method expression call into an
export function in typecheck package, so others can re-use it.
- walkCall now have to call usemethod for method expression calls.
(It seems to me this is a bug in current tip, because if one write
(*rtype).Method(typ, i) in package "reflect", then the function won't
be marked with AttrReflectMethod)
Passes toolstash -cmp.
Change-Id: I4745ab6110b417c7fd32949cc799811a882cd2ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/330671
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By checking for method name first.
Passes toolstash -cmp
Change-Id: I1f4125157a8bc247e4766a882467b805a205a3c2
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Currently ORECOVER is a single operation that both (1) calculates
the (logical) caller frame pointer and (2) calls runtime.gorecover.
This is normally fine, but it's inconvenient for regabi, which wants
to wrap "defer recover()" into "defer func() { recover() }" and
needs (1) and (2) to happen at different times.
The current solution is to apply walkRecover early to split it into
the two steps, but calling it during order is a minor layering
violation. It works well today because the order and walk phases are
closely related anyway and walkRecover is relatively simple, but it
won't work for go/defer wrapping earlier into the frontend.
This CL adds a new, lower-level ORECOVERFP primitive, which represents
just part (2); and OGETCALLER{PC,SP} primitives, which provide a way
to compute (1) in the frontend too.
OGETCALLERPC isn't needed/used today, but it seems worth including for
completeness. Maybe it will be useful at some point for intrinsifying
runtime.getcaller{pc,sp}, like we already do for runtime.getg.
Change-Id: Iaa8ae51e09306c45c147b6759a5b7c24dcc317ca
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When ABI wrappers are used, there are cases where in Go code we
need the PC of the defined function instead of the ABI wrapper.
Currently we work around this by define such functions as
ABIInternal, even if they do not actually follow the internal ABI.
This CL introduces internal/abi.FuncPCABIxxx functions as compiler
intrinsics, which return the underlying defined function's entry
PC if the argument is a direct reference of a function of the
expected ABI, and reject it if it is of a different ABI.
As a proof of concept, change runtime.goexit back to ABI0 and use
internal/abi.FuncPCABI0 to retrieve its PC.
Updates #44065.
Change-Id: I02286f0f9d99e6a3090f9e8169dbafc6804a2da6
Reviewed-on: https://go-review.googlesource.com/c/go/+/304232
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When creating the temporary for map functions, if the key
contains pointer, we need to create pointer-typed temporary. So
if the temporary is live across a function call, the pointer is
live.
Change-Id: Id6e14ec9def8bc7987f0f8ce8423caf1e3754fcb
Reviewed-on: https://go-review.googlesource.com/c/go/+/311379
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The go/build package needs access to this configuration,
so move it into a new package available to the standard library.
Change-Id: I868a94148b52350c76116451f4ad9191246adcff
Reviewed-on: https://go-review.googlesource.com/c/go/+/310731
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Reviewed-by: Jay Conrod <jayconrod@google.com>
Following CL 309029, this CL does the same thing for map
functions (mapaccess, mapassign, mapdelete).
For simplicity, always wrap "defer delete(m, k)". With
regabidefers enabled, this call is wrapped in a closure and the
rewriting happens automatically. Without regabidefers, it may not
be wrapped for certain key types, and then we'd need special
handling of the delete (because earlier the order pass does not
handle it). And we will turn on defer wrapping by default anyway.
Change-Id: I30663b1aa8e1d6f98e1fb81bf8c0c0ce607ab80b
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CL 298669 implemented wrapping for defer/go calls so the function
being called with defer or go statement has no arguments. This
simplifies the compiler and the runtime, especially with the
new ABI.
If the called function does not have any argument, we don't need
to wrap. But the code missed the cases of method receiver, as
well as some apparent argumentless builtin calls which may later
be rewritten to having arguments (e.g. recover). This CL makes
sure to wrap those cases. Also add a check to ensure that go and
defer calls are indeed argumentless.
Handle "defer recover()" specially, as recover() is lowered to
runtime.gorecover(FP) where FP is the frame's FP. FP needs to be
evaluated before wrapping.
Updates #40724.
Change-Id: I2758b6c69ab6aa02dd588441a457fe28ddd0d5a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/304771
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This moves all remaining GOEXPERIMENT flags into the objabi.Experiment
struct, drops the "_enabled" from their name, and makes them all bool
typed.
We also drop DebugFlags.Fieldtrack because the previous CL shifted the
one test that used it to use GOEXPERIMENT instead.
Change-Id: I3406fe62b1c300bb4caeaffa6ca5ce56a70497fe
Reviewed-on: https://go-review.googlesource.com/c/go/+/302389
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Currently, the compiler synthesize a special ".fp" node, which
points to the FP of the current frame, be to used to call
gorecover. Later that node turns to an Arg in SSA that is not
really an arg, causing problems for the new ABI work which changes
the handling of Args, so we have to special-case that node.
This CL changes the compiler to get the FP by using getcallersp,
which is an intrinsic in SSA and works on all platforms. As we
need the FP, not the caller SP, one drawback is that we have to
add FixedFrameSize for LR machines. But it does allow us to remove
that special node.
Change-Id: Ie721d51efca8116c9d23cc4f79738fffcf847df8
Reviewed-on: https://go-review.googlesource.com/c/go/+/297930
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Reviewed-by: David Chase <drchase@google.com>
This reverts commit CL 294849.
Reason for revert: this doesn't actually fix the issue, as revealed
by the noopt builder's failures.
Change-Id: Ib4ea9ceb4d75e46b3b91ec348b365fd8c83316ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/296629
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
In CL 253457, we did the same fix for direct function calls. But for
method calls, the receiver argument also need to be passed through the
wrapper function, which we are not doing so the compiler crashes with
the code in #44415.
As we already rewrite t.M(...) into T.M(t, ...) during walkCall1, to fix
this, we can do the same trick in wrapCall, so the receiver argument
will be treated as others.
Fixes#44415
Change-Id: I396182983c85d9c5e4494657da79d25636e8a079
Reviewed-on: https://go-review.googlesource.com/c/go/+/294849
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Conflicts:
- src/cmd/compile/internal/gc/walk.go
gc/walk.go is changed in CL 290950 on the master branch but
deleted in the dev.regabi branch and moved over to the walk
package. This CL includes porting CL 290950 over to the new
walk.
Merge List:
+ 2021-02-12 ff0e93ea31 doc/go1.16: note that package path elements beginning with '.' are disallowed
+ 2021-02-11 249da7ec02 CONTRIBUTORS: update for the Go 1.16 release
+ 2021-02-11 864d4f1c6b cmd/go: multiple small 'go help' fixes
+ 2021-02-11 26ceae85a8 spec: More precise wording in section on function calls.
+ 2021-02-11 930c2c9a68 cmd/go: reject embedded files that can't be packed into modules
+ 2021-02-11 e5b08e6d5c io/fs: allow backslash in ValidPath, reject in os.DirFS.Open
+ 2021-02-10 ed8079096f cmd/compile: mark concrete call of reflect.(*rtype).Method as REFLECTMETHOD
+ 2021-02-09 e9c9683597 cmd/go: suppress errors from 'go get -d' for packages that only conditionally exist
+ 2021-02-09 e0ac989cf3 archive/tar: detect out of bounds accesses in PAX records resulting from padded lengths
+ 2021-02-09 c9d6f45fec runtime/metrics: fix a couple of documentation typpos
+ 2021-02-09 cea4e21b52 io/fs: backslash is always a glob meta character
+ 2021-02-08 dc725bfb3c doc/go1.16: mention new vet check for asn1.Unmarshal
Change-Id: Ib28fffa7dfbff7f6cdbfaf4a304757fead7bbf19
Instead, push the temps assignments to init. This does not pass
toolstash, since when before this, the temps were evaluated after
function callee, now we evaluate them before.
Change-Id: Icb9cb10e036925b56c1ef3eec468416a11f4932f
Reviewed-on: https://go-review.googlesource.com/c/go/+/284894
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This CL adds a few new helper functions for constructing and
initializing temporary variables during walk.
Passes toolstash -cmp.
Change-Id: I54965d992cd8dfef7cb7dc92a17c88372e52a0d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/284224
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
