When we create a thread with signals blocked. But glibc's
pthread_sigmask doesn't really allow us to block SIGSETXID. So we
may get a signal early on before the signal stack is set. If we
get a signal on the current stack, it will clobber anything below
the SP. This CL makes it to save LR and decrement SP in a single
MOVD.W instruction for small frames, so we don't write below the
SP.
We used to use a single MOVD.W instruction before CL 379075.
CL 379075 changed to use an STP instruction to save the LR and FP,
then decrementing the SP. This CL changes it back, just this part
(epilogues and large frame prologues are unchanged). For small
frames, it is the same number of instructions either way.
This decreases the size of a "small" frame from 0x1f0 to 0xf0.
For frame sizes in between, it could benefit from using an
STP instruction instead of using the prologue for the "large"
frame case. We don't bother it for now as this is a stop-gap
solution anyway.
This only addresses the issue with small frames. Luckily, all
functions from thread entry to setting up the signal stack have
samll frames.
Other possible ideas:
- Expand the unwind info metadata, separate SP delta and the
location of the return address, so we can express "SP is
decremented but the return address is in the LR register". Then
we can always create the frame first then write the LR, without
writing anything below the SP (except the frame pointer at SP-8,
which is minor because it doesn't really affect program
execution).
- Set up the signal stack immediately in mstart in assembly.
For Go 1.19 we do this simple fix. We plan to do the metadata fix
in Go 1.20 ( #53609 ).
Other LR architectures are addressed in CL 413428.
Fix#53374.
Change-Id: I9d6582ab14ccb06ac61ad43852943d9555e22ae5
Reviewed-on: https://go-review.googlesource.com/c/go/+/412474
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Eric Fang <eric.fang@arm.com>
Previously, FileSet would cache the last *File found by a lookup,
using a full (exclusive) mutex within FileSet.File, turning a logical
read operation into an update. This was one of the largest sources
of contention in gopls. This change uses atomic load/store on the
'last' field without a mutex.
Also, in FileSet.AddFile, allocate the File outside the critical
section; all the other operations are typically cheap.
Fixes#53507
Change-Id: Ice8641650d8495b25b0428e9b9320837ff2ca7e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/411909
Reviewed-by: Robert Findley <rfindley@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Do not accept "Transfer-Encoding: \rchunked" as a valid TE header
setting chunked encoding.
Thanks to Zeyu Zhang (https://www.zeyu2001.com/) for identifying
the issue.
Fixes#53188
Fixes CVE-2022-1705
Change-Id: I1a16631425159267f2eca68056b057192a7edf6c
Reviewed-on: https://go-review.googlesource.com/c/go/+/409874
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
cbs.lock protects a map. The map implementation is race instrumented
regardless of which package is it called from.
lock/unlock are not automatically race instrumented, so we can trigger
race false positives without manually annotating our lock acquire and
release.
compileCallback is used during initialization before the P is available,
at which point raceacquire will crash during a racecallback to get the
race proc. Thus we skip instrumentation until scheduler initialization
is complete.
Fixes#50249.
Change-Id: Ie49227c9e9210ffbf0aee65f86f2b7b6a2f64638
Reviewed-on: https://go-review.googlesource.com/c/go/+/414518
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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The Go 1.18 frontend ICEs on select case clauses that involve an
implicit conversion.
Change-Id: I1c0865bf97d8b0a8fbddb0da43333e909df0d38a
Reviewed-on: https://go-review.googlesource.com/c/go/+/414878
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Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: David Chase <drchase@google.com>
There was a deprecation message on RevokedCertificate which was
intended to be on CertificateList.
Change-Id: Ia378935afc75c36702e64cf33ea5c8a24c1488ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/414754
Auto-Submit: Roland Shoemaker <roland@golang.org>
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Run-TryBot: Roland Shoemaker <roland@golang.org>
Reviewed-by: Tatiana Bradley <tatiana@golang.org>
Following CL 412474, for the rest of the LR architectures. On
MIPS(32/64), S390X, and RISCV, there is no single instruction that
saves the LR and decrements the SP, so we need to insert an
instruction to save the LR after decrementing the SP.
On ARM(32) and PPC64 we already use a single instruction to save
the LR and decrement the SP.
Updates #53374.
Change-Id: I5a2e211026d95edb0e0f7d084ddb784f8077b86d
Reviewed-on: https://go-review.googlesource.com/c/go/+/413428
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
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metricsSema protects the metrics map. The map implementation is race
instrumented regardless of which package is it called from.
semacquire/semrelease are not automatically race instrumented, so we can
trigger race false positives without manually annotating our lock
acquire and release.
See similar instrumentation on trace.shutdownSema and reflectOffs.lock.
Fixes#53542.
Change-Id: Ia3fd239ac860e037d09c7cb9c4ad267391e70705
Reviewed-on: https://go-review.googlesource.com/c/go/+/414517
Run-TryBot: Michael Pratt <mpratt@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
For some 32-bit instructions whose first operand is a constant, we
copy the lower 32 bits of the constant into the upper 32 bits in progedit,
which leads to the wrong value being printed in -S output.
The purpose of this is that we don't need to distinguish between 32-bit
and 64-bit constants when checking C_BITCON, this CL puts the modified
value in a temporary variable, so that the constant operand of the
instruction will not be modified.
Fixes#53551
Change-Id: I40ee9223b4187bff1c0a1bab7eb508fcb30325f9
Reviewed-on: https://go-review.googlesource.com/c/go/+/414374
Run-TryBot: Eric Fang <eric.fang@arm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
If the current directory is also listed explicitly in %PATH%,
this changes the behavior of LookPath to prefer the explicit name for it
(and thereby avoid ErrDot).
However, in order to avoid running a different executable from what
would have been run by previous Go versions, we still return the
implicit path (and ErrDot) if it refers to a different file entirely.
Fixes#53536.
Updates #43724.
Change-Id: I7ab01074e21a0e8b07a176e3bc6d3b8cf0c873cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/414054
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
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If value is a non-empty interface and has shape, we still need to
convert it to an interface{} first.
Fixes#53477
Change-Id: I516063ba4429a6cc24c483758387ec13815fc63e
Reviewed-on: https://go-review.googlesource.com/c/go/+/414834
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
The responses have been cached by the web2 package before removed
it in CL 170879. This change add latest revinfo cache in Versions
func.
Fixes#51391
Change-Id: I73597e0a6b4938238e69d85e1cbbaa9007776db3
Reviewed-on: https://go-review.googlesource.com/c/go/+/403335
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Reviewed-by: David Chase <drchase@google.com>
Add analogous tests to go/types and types2 test suites.
Make sure "assert" built-in is available in type-checker
tests.
For #49157.
For #53585.
Change-Id: I092901ecb43eb4833c09bd8f5e38efbe0285babe
Reviewed-on: https://go-review.googlesource.com/c/go/+/414795
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
For #51475
Change-Id: Ie1b27304687225194a323dc8305e5d62578fff4f
Reviewed-on: https://go-review.googlesource.com/c/go/+/414755
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Reviewed-by: Cherry Mui <cherryyz@google.com>
CGO flag variables often include system paths for header files and
compiled libraries. The point of -trimpath is to avoid dependending on
system paths, so stamping these variables is counterproductive.
Moreover, the point of stamping build information is to improve
reproducibility. Since we don't also stamp the versions of C
compilers, headers, and libraries used in a cgo build, only the most
trivial cgo programs can be faithfully reproduced from the stamped
information.
Likewise, the -ldflags flag may include system-specific paths,
particularly if external linking is in use. For now, we omit -ldflags
entirely; however, in the future we may instead want to parse and
redact the individual flags.
Fixes#52372.
Change-Id: I73318a01cce4371d66955b3261fc7ee58d4b33dd
Reviewed-on: https://go-review.googlesource.com/c/go/+/409174
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Bryan Mills <bcmills@google.com>
It was #51868 not #51686.
For #53310.
Change-Id: I2cf28ca4de65e7030fdbd05e7f32fe42c8f3ca0a
Reviewed-on: https://go-review.googlesource.com/c/go/+/414515
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
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Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
We now get more than just time/op.
name time/op
Print-16 6.29ms ± 3%
name speed
Print-16 8.25MB/s ± 3%
name alloc/op
Print-16 483kB ± 0%
name allocs/op
Print-16 17.8k ± 0%
Change-Id: I6b5e9a30a826ff8603724bd5983e6b7f5ec12708
Reviewed-on: https://go-review.googlesource.com/c/go/+/412554
Reviewed-by: Robert Griesemer <gri@google.com>
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Auto-Submit: Robert Griesemer <gri@google.com>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Ian Lance Taylor <iant@google.com>
CL 410342 removed package height, but still needs to keep writing out 0
for iexport for compatibility with existing importers. With Unified IR,
we don't have to, so get rid of the package height completely.
Change-Id: I84a285cbaddd7bb0833d45a24a6818231b4d2b71
Reviewed-on: https://go-review.googlesource.com/c/go/+/411014
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Same as CL 410342, but for types2.
Updates #51734
Change-Id: I6d6cb8fbb7567d3acf0b8cec0fa74f1344b56a1c
Reviewed-on: https://go-review.googlesource.com/c/go/+/410347
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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For #38111
Change-Id: I2651687367af68ee070ea91106f4bc18adab2762
Reviewed-on: https://go-review.googlesource.com/c/go/+/414634
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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On darwin_arm64, reading from a socket at the same time as the other
end is closing it will occasionally hang for 60 seconds before
returning ECONNRESET. (This is a macOS issue, not a Go issue.)
Work around this condition by adding a brief sleep before the read.
Fixes#49352 (we hope).
Updates #37795.
Change-Id: I4052aec21d311d7370550aea9dd7941f39141133
Reviewed-on: https://go-review.googlesource.com/c/go/+/414534
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
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esacped -> escaped
Change-Id: I253c46b30bb1cf7cdfb4668628907d16428fefb9
GitHub-Last-Rev: accd0e089f
GitHub-Pull-Request: golang/go#53553
Reviewed-on: https://go-review.googlesource.com/c/go/+/414274
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Ian Lance Taylor <iant@google.com>
As of LLVM rev 41cb504b7c4b18ac15830107431a0c1eec73a6b2, the
race detector runtime now refers to things in the windows
synchronization library, hence when doing windows internal
linking, at that library to the list of host archives that
we visit. The tsan code that makes the reference is here:
41cb504b7c/compiler-rt/lib/sanitizer_common/sanitizer_win.cpp (L48)41cb504b7c/compiler-rt/lib/sanitizer_common/sanitizer_win.cpp (L834)
Note that libsynchronization.a is not guaranteed to be available on
all windows systems, so in the external linking case, check for its
existence before adding "-lsynchronization" to the external linker
args.
Updates #53539.
Change-Id: I433c95c869915693d59e9c1082d5b8a11da1fc8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/413817
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
For #52871
Change-Id: Id6102222a8b1ec8a84b716425bed0e349c65dbc4
Reviewed-on: https://go-review.googlesource.com/c/go/+/414336
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The gofrontend crashed importing a complex 0 constant.
For #52862
Change-Id: Ia87d8eadb9c5ddf51e1cd65c1a626f05f0d068d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/413980
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runtime/internal/syscall is a runtime package, so it should be built
with -+.
Specifically, we don't want libfuzzer instrumentation in Go functions
defined in runtime/internal/syscall, which is disabled with -+.
For #53190.
Change-Id: I9f16f5c7c7ce10b98371e9de82fcea6da854e163
Reviewed-on: https://go-review.googlesource.com/c/go/+/413818
Run-TryBot: Michael Pratt <mpratt@google.com>
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Requested by the maintainers of the OpenSSL-based fork of Go+BoringCrypto,
to make maintaining that fork easier.
Change-Id: I770e70ecc12b589034da31edecf59c73b2c6e1dd
Reviewed-on: https://go-review.googlesource.com/c/go/+/407135
Run-TryBot: Russ Cox <rsc@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
This lets us generate identical copies of fastlog2table.go on all hosts.
Tested by regenerating fastlog2table.go on linux-amd64 and darwin-arm64.
Fixes#49891
Change-Id: I279d6b5abb5a5290c049d9658050fd9c8d0c0190
Reviewed-on: https://go-review.googlesource.com/c/go/+/413976
Run-TryBot: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Michael Knyszek <mknyszek@google.com>
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For #52856
Change-Id: Iab3e8352f64d774058391f0422cd01c53c3e711d
Reviewed-on: https://go-review.googlesource.com/c/go/+/414235
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
The previous change implemented the missing fallthrough checking
in the parser. Therefore we can now disable the duplicate check
in the type checker:
- rename (types2.Config.)IngoreLabels to IgnoreBranches to more
accurately reflect its functionality
- now also ignore break/continue/fallthroughs, not just labels
The IgnoreBranches flag only exists for types2, for use with
the compiler. There's no need to port this code to go/types.
Note: An alternative (and perhaps better) approach would be
to not use the the parser's CheckBranches mode and instead
enable (i.e. not disable) the branch/label checking in the
type checker. However, this requires a bit more work because
the type checker's error messages about goto's jumping over
variables don't have access to the variable names, which are
desired in the error messages.
Fixes#51456.
Change-Id: Ib2e71e811d4e84e4895b729646e879fd43b12dcd
Reviewed-on: https://go-review.googlesource.com/c/go/+/414135
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Robert Griesemer <gri@google.com>
The parser CheckBranches mode checked correct use of break, continue,
and labels, but not of fallthrough statements.
This CL adds checking of fallthrough statements as well.
For #51456.
Change-Id: I5000388011973724f80c59a6aaf015e3bb70faea
Reviewed-on: https://go-review.googlesource.com/c/go/+/414134
Reviewed-by: Robert Griesemer <gri@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
These functions can be inserted by the compiler into the code to be
instrumented. This may result in these functions having callers that
are nosplit. That is why they must be nosplit.
This is a followup for CL 410034 in order to fix#53190.
Change-Id: I03746208a2a302a581a1eaad6c9d0672bb1e949a
GitHub-Last-Rev: 6506d86f22
GitHub-Pull-Request: golang/go#53544
Reviewed-on: https://go-review.googlesource.com/c/go/+/413978
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Reviewed-by: Keith Randall <khr@google.com>
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Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Fixes#50710
Change-Id: I62feddbe3eaae9605d196bec60d378614436603a
Reviewed-on: https://go-review.googlesource.com/c/go/+/379754
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Calling FormatFloat with an invalid value of fmt is expected
to return a string containing '%' and the input fmt character.
Since even before Go 1.0, the code has been panicking in the
case where prec=0.
Fixes#52187
Change-Id: I74fec601eedb7fe28efc5132c4253674661452aa
Reviewed-on: https://go-review.googlesource.com/c/go/+/402817
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Auto-Submit: Emmanuel Odeke <emmanuel@orijtech.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Update instructions to match what seems to be the historical practice:
to generate canned traces when a version is finalized, rather than
waiting until it is superseded.
Follow rename of trace-internal tests from "Span" to "Region". Update
the net/http test invocation to match the apparent intent and the actual
http_1_5_good behavior (about 7ms of total run time and trace file size
under 50kB).
Change-Id: Ifd4c85882159478852e0b8f0d771b6f16b8f3c1b
Reviewed-on: https://go-review.googlesource.com/c/go/+/413776
Run-TryBot: Rhys Hiltner <rhys@justin.tv>
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Non-main packages in module mode should not be installed to
GOPATH/pkg, but due to #37015 they were installed there anyway.
This change switches the 'go install' command to instead use
'go build -buildmode=archive' with an explicit archive path.
For #37015.
Change-Id: Ib0c8f213100b6473a7657af96f31395703e28493
Reviewed-on: https://go-review.googlesource.com/c/go/+/414055
Auto-Submit: Bryan Mills <bcmills@google.com>
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Packages outside the module cache including the standard library will be
indexed individually rather than as a whole module.
For #52876
Change-Id: I142dad6a790e9e8eb4dc6430a588fbfa86552e49
Reviewed-on: https://go-review.googlesource.com/c/go/+/413815
Reviewed-by: Michael Matloob <matloob@golang.org>
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Also align Retracted documentation with actual type of []string
Fixes#51876
Change-Id: I3b34e53424aa7ee5330eb71adac23510fff91798
Reviewed-on: https://go-review.googlesource.com/c/go/+/394677
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
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Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Fixes#50788.
Change-Id: Id1ed7d9c0687e3005e28598373fd5634178c78ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/413895
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
For #51525.
Change-Id: I3762bc4a48a1aaab3b006b1ad1400f866892243c
Reviewed-on: https://go-review.googlesource.com/c/go/+/413934
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Fixes#53522
Change-Id: Ibed838d358a733d26a6c3d89446d7fadb1012961
Reviewed-on: https://go-review.googlesource.com/c/go/+/413876
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
This CL renames:
1. "haveRType" to "hasRType", suggested by drchase@ during review of
CL 413358; and
2. "implicitExpr" to "implicitConvExpr", suggested by khr@ during
review of CL 413396.
Change-Id: Ibb4deae20908d960706640991ea44d1b9c0b9e3c
Reviewed-on: https://go-review.googlesource.com/c/go/+/413854
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
This CL inserts implicit conversions for simple N:N assignment
statements within Unified IR. A subsequent CL will handle N:1
assignments.
Change-Id: I7e204c6ee9ffdb9fa2bc9146315fd79735c04628
Reviewed-on: https://go-review.googlesource.com/c/go/+/413516
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>
