It currently says only what it wasn't good for, which is not helpful.
Change-Id: I468c7f385c14eaca99788a94d53c30b729ed0944
Reviewed-on: https://go-review.googlesource.com/c/go/+/466276
Reviewed-by: Ian Lance Taylor <iant@google.com>
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For unification we only need the handles map.
The type parameter list was stored for reproducible printing only,
but we can achieve the same effect with sorting.
This opens the door to adding type parameters from different
types/functions that we may want to infer together. They may
be added through separate "addTypeParams" calls in the future.
Printing (which is used for debugging only) will remain reproducible.
Change-Id: I23b56c63fa45a7d687761f2efcf558e61b004584
Reviewed-on: https://go-review.googlesource.com/c/go/+/466955
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Rather than referring back to the type parameter list stored with
the unifier, return inferred types for a given list of type parameters.
This decouples the unifier more and opens the door for inference to
consider type parameters from multiple types for inference.
While at it, introduce an internal flag to control whether
inference results of the two inference implementations should
be compared or not.
Change-Id: I23b254c6c1c750f5bd1360aa2bb088cc466434f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/466795
Reviewed-by: Robert Griesemer <gri@google.com>
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Change-Id: I4f9b84696f55c6b381de60682f8b242098b95b75
GitHub-Last-Rev: 74a6013a9e
GitHub-Pull-Request: golang/go#58402
Reviewed-on: https://go-review.googlesource.com/c/go/+/466335
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This change introduces the Compare and Compare32 functions
based on the total-ordering predicate in IEEE-754, section 5.10.
In particular,
* -NaN is ordered before any other value
* +NaN is ordered after any other value
* -0 is ordered before +0
* All other values are ordered the usual way
name time/op
Compare-8 0.24ns ± 1%
Compare32-8 0.24ns ± 0%
Fixes#56491.
Change-Id: I9444fbfefe26741794c4436a26d403b8da97bdaf
Reviewed-on: https://go-review.googlesource.com/c/go/+/459435
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The Error type used in failed fetch invocations contain more
information than we're currently extracting. Optimistically
look for the cause field for extra context for errors.
Change-Id: I6c8e4b230a21ec684af2107707aa605fc2148fcf
Reviewed-on: https://go-review.googlesource.com/c/go/+/463978
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Reviewed-by: Evan Phoenix <evan@phx.io>
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The existing runtime_expandFinalInlineFrame implementation doesn't skip trailing wrappers, but
gentraceback does skip wrapper functions.
This change makes runtime_expandFinalInlineFrame handling wrapper functions consistent to gentraceback.
Fixes#58288
Change-Id: I1b0e2c10b0a89bcb1e787b98d27730cb40a34406
Reviewed-on: https://go-review.googlesource.com/c/go/+/465097
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There are a plenty of regression in 1.20 with this optimization. This CL
disable inline static init, so it's safer to backport to 1.20 branch.
The optimization will be enabled again during 1.21 cycle.
Updates #58293
Updates #58339
For #58293
Change-Id: If5916008597b46146b4dc7108c6b389d53f35e95
Reviewed-on: https://go-review.googlesource.com/c/go/+/467015
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
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This global variable was used by the old frontend to decide whether to
perform escape analysis during method wrapper generation.
The old frontend is gone now, the variable is not used anywhere else.
Change-Id: I448f2761ea608a9a2ec39a9920fcf7aa12d98799
Reviewed-on: https://go-review.googlesource.com/c/go/+/466278
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This patch fixes a panic from incorrect interface conversion from
*ir.BasicLit to *ir.ConstExpr. This only occurs when nounified
GOEXPERIMENT is set, so ideally it should be backported to Go
1.20 and removed from master.
Fixes#58339
Change-Id: I357069d7ee1707d5cc6811bd2fbdd7b0456323ae
GitHub-Last-Rev: 641dedb5f9
GitHub-Pull-Request: golang/go#58389
Reviewed-on: https://go-review.googlesource.com/c/go/+/466175
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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Since go1.19, these errors are already reported by types2 for any user's
Go code. Compiler generated code, which looks like constant expression
should be evaluated as non-constant semantic, which allows overflows.
Fixes#58293
Change-Id: I6f0049a69bdb0a8d0d7a0db49c7badaa92598ea2
Reviewed-on: https://go-review.googlesource.com/c/go/+/465096
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
These functions are linked using go:linkname, but do not match the
original declarations. This change brings these in sync.
Change-Id: I16651304c3dba2f9897c2c42e30555d2f7805c2a
Reviewed-on: https://go-review.googlesource.com/c/go/+/466615
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The tests for cmd/go/internal/test were not running at all due to a
missed call to m.Run in TestMain. That masked two missing vet
analyzers ("directive" and "timeformat") and a missed update to the
generator script in CL 355452.
Fixes#58415.
Change-Id: I7b0315952967ca07a866cdaa5903478b2873eb7a
Reviewed-on: https://go-review.googlesource.com/c/go/+/466635
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This gets eliminated by thoses rules above:
// for rewriting results of some late-expanded rewrites (below)
(SelectN [0] (MakeResult x ___)) => x
(SelectN [1] (MakeResult x y ___)) => y
(SelectN [2] (MakeResult x y z ___)) => z
Fixes#58161
Change-Id: I4fbfd52c72c06b6b3db906bd9910b6dbb7fe8975
Reviewed-on: https://go-review.googlesource.com/c/go/+/463846
Reviewed-by: Cherry Mui <cherryyz@google.com>
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This reverts CL 465135.
Reason for revert: This broke cmd/go.TestScript/build_pgo on the linux-amd64-longtest builder: https://build.golang.org/log/8f8ed7bf576f891a06d295c4a5bca987c6e941d6
Change-Id: Ie2f2cc2731099eb28eda6b94dded4dfc34e29441
Reviewed-on: https://go-review.googlesource.com/c/go/+/466439
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Fix a minor buglet in atomic mode fixup that would generate
non-compilable code for a package containing only the "package X"
clause with no trailing newline following the "X".
Fixes#58370.
Change-Id: I0d9bc4f2b687c6bd913595418f6db7dbe50cc5df
Reviewed-on: https://go-review.googlesource.com/c/go/+/466115
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
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This patch detects at which index position profiling samples that have the value-type samples count are, instead of the previously hard-coded position of index 1. Runtime generated profiles always generate CPU profiling data with the 0 index being CPU nanoseconds, and samples count at index 1, which is why this previously hasn't come up.
Fixes#58292
Change-Id: Idde761d53b02259f3076c4e5dcb4a96a9d53df0e
GitHub-Last-Rev: dabbf9f88c
GitHub-Pull-Request: golang/go#58294
Reviewed-on: https://go-review.googlesource.com/c/go/+/465135
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- Fix typo in throw error message for arena.
- Correct typos in assembly and Go comments.
- Fix log message in TestTraceCPUProfile.
Change-Id: I874c9e8cd46394448b6717bc6021aa3ecf319d16
GitHub-Last-Rev: d27fad4d3c
GitHub-Pull-Request: golang/go#58375
Reviewed-on: https://go-review.googlesource.com/c/go/+/465975
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CL 465515 instrinsify these functions, so that we can remove them.
Change-Id: I81c9eb62ecf56d5a292dc5aced542b36b53847dc
Reviewed-on: https://go-review.googlesource.com/c/go/+/465516
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The BSWAPL instruction is supported in i486 and newer.
https://github.com/golang/go/wiki/MinimumRequirements#386 says we
support "All Pentium MMX or later". The Pentium is also referred to as
i586, so that we are safe with these instructions.
Change-Id: I6dea1f9d864a45bb07c8f8f35a81cfe16cca216c
Reviewed-on: https://go-review.googlesource.com/c/go/+/465515
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Blank node must be ignored when building arguments substitued tree.
Otherwise, it could be used to replace other blank node in left hand
side of an assignment, causing an invalid IR node.
Consider the following code:
type S1 struct {
s2 S2
}
type S2 struct{}
func (S2) Make() S2 {
return S2{}
}
func (S1) Make() S1 {
return S1{s2: S2{}.Make()}
}
var _ = S1{}.Make()
After staticAssignInlinedCall, the assignment becomes:
var _ = S1{s2: S2{}.Make()}
and the arg substitued tree is "map[*ir.Name]ir.Node{_: S1{}}". Now,
when doing static assignment, if there is any assignment to blank node,
for example:
_ := S2{}
That blank node will be replaced with "S1{}":
S1{} := S2{}
So constructing an invalid IR which causes the ICE.
Fixes#58325
Change-Id: I21b48357f669a7e02a7eb4325246aadc31f78fb9
Reviewed-on: https://go-review.googlesource.com/c/go/+/465098
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Change-Id: I5e3aca2b8fc78f38c9e2cdc67adf86d57ac85b1c
GitHub-Last-Rev: 0e5ddffe33
GitHub-Pull-Request: golang/go#58353
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CL 458619 fixed the problem un-intentionally, so adding test to prevent
regression happening.
Updates #58345
Change-Id: I80cf60716ef85e142d769e8621fce19c826be03d
Reviewed-on: https://go-review.googlesource.com/c/go/+/465455
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This CL marks some darwin assembly functions as NOFRAME to avoid relying
on the implicit amd64 NOFRAME heuristic, where NOSPLIT functions
without stack were also marked as NOFRAME.
This is a second attempt after CL 460235 was reverted.
Change-Id: I790f2108fc01ec193aa32b0bc82362c2344a9f3b
Reviewed-on: https://go-review.googlesource.com/c/go/+/466055
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The usage of ISELB has been removed as part of changes
made to support Power10 SETBC instructions.
Change-Id: I2fce4370f48c1eeee65d411dfd1bea4201f45b45
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Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
CL 461958 fixed a potential panic,
but also introduced an observable regression where
invalid input could be detected before the panic occurs.
Adjust the check to preserve prior behavior,
while also preventing the panic.
Change-Id: I52819f88a6a64883fbc9fd512697c38c29ca0ccd
Reviewed-on: https://go-review.googlesource.com/c/go/+/465855
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Return an explicit error when PrivateKey.ECDH is called with a PublicKey
which uses a different Curve. Also document this requirement, even
though it is perhaps obvious.
Fixes#58131
Change-Id: I739181a3f1283bed14fb5ee7eb78658b854d28d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/464335
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This patch changes the compiler's pkg init machinery to pick out large
initialization assignments to global maps (e.g.
var mymap = map[string]int{"foo":1, "bar":2, ... }
and extract the map init code into a separate outlined function, which is
then called from the main init function with a weak relocation:
var mymap map[string]int // KEEP reloc -> map.init.0
func init() {
map.init.0() // weak relocation
}
func map.init.0() {
mymap = map[string]int{"foo":1, "bar":2}
}
The map init outlining is done selectively (only in the case where the
RHS code exceeds a size limit of 20 IR nodes).
In order to ensure that a given map.init.NNN function is included when
its corresponding map is live, we add dummy R_KEEP relocation from the
map variable to the map init function.
This first patch includes the main compiler compiler changes, and with
the weak relocation addition disabled. Subsequent patch includes the
requred linker changes along with switching to the call to the
outlined routine to a weak relocation. See the later linker change for
associated compile time performance numbers.
Updates #2559.
Updates #36021.
Updates #14840.
Change-Id: I1fd6fd6397772be1ebd3eb397caf68ae9a3147e9
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People are using this to get the name of the function from a function type:
runtime.FuncForPC(reflect.ValueOf(fn).Pointer()).Name()
Unfortunately, this technique falls down when the first instruction
of the function is from an inlined callee. Then the expression above
gets you the name of the inlined function instead of the function itself.
To fix this, ensure that the first instruction is never from an inlinee.
Normally functions have prologs so those are already fine. In just the
cases where a function is a leaf with no local variables, and an instruction
from an inlinee appears first in the prog list, add a nop at the start
of the function to hold a non-inlined position.
Consider the nop a "mini-prolog" for leaf functions.
Fixes#58300
Change-Id: Ie37092f4ac3167fe8e5ef4a2207b14abc1786897
Reviewed-on: https://go-review.googlesource.com/c/go/+/465076
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Introduce a flag in the object file indicating whether a given
function corresponds to a compiler-generated (not user-written) init
function, such as "os.init" or "syscall.init". Add code to the
compiler to fill in the correct value for the flag, and add support to
the loader package in the linker for testing the flag. The new loader
API is currently unused, but will be needed in the next CL in this
stack.
Updates #2559.
Updates #36021.
Updates #14840.
Change-Id: Iea7ad2adda487e4af7a44f062f9817977c53b394
Reviewed-on: https://go-review.googlesource.com/c/go/+/463855
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When unifying types, we always consider underlying types if inference
would fail otherwise. If a type parameter has a (non-defined) type
inferred and later matches against a defined type, make sure to keep
that defined type instead.
For #43056.
Change-Id: I24e4cd2939df7c8069e505be10914017c1c1c288
Reviewed-on: https://go-review.googlesource.com/c/go/+/464348
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The intent was to always append a newline if a newline was missing.
The older logic accidentally only checked the payload for newlines
and forgot to check the prefix as well. Fix it to check both together.
This changes the output of Logger.Output in the situation where
the prefix contains a trailing newline and the output is empty.
This is a very rare combination and unlikely to occur in practice.
Change-Id: Ic04ded6c29a90383e29bf7f59223a808ee1cbdc0
Reviewed-on: https://go-review.googlesource.com/c/go/+/465316
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It was mentioned after CL 463993 was merged that it
is uncommon to use shifts for numbers other than
powers of ten. Replace the shift with a base 10 constant.
Change-Id: I11c90128740109a59add40ed7b680f7bcc9715ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/465275
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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Instruction formats: rdtime rd, rj
The RDTIME family of instructions are used to read constant frequency timer
information, the stable counter value is written into the general register
rd, and the counter id information is written into the general register rj.
(Note: both of its register operands are outputs).
Ref: https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html
Change-Id: Ida5bbb28316ef70b5f616dac3e6fa6f2e77875b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/421655
Reviewed-by: xiaodong liu <teaofmoli@gmail.com>
Reviewed-by: WANG Xuerui <git@xen0n.name>
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Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
This CL adds rules that replaces instances of ISEL that produce
a boolean result based on a condition register by SETBC/SETBCR
operations. On Power10 these are convereted to SETBC/SETBCR
instructions that use one register instead of 3 registers
conventionally used by ISEL and hence reduces register pressure.
On loops written specifically to exercise such instances of ISEL
extensively, a performance improvement of 2.5% is seen on Power10.
Also added verification tests to verify correct generation of
SETBC/SETBCR instructions on Power10.
Change-Id: Ib719897f09d893de40324440a43052dca026e8fa
Reviewed-on: https://go-review.googlesource.com/c/go/+/449795
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Archana Ravindar <aravind5@in.ibm.com>
Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Update unicode/tables.go to reflect changes in the Unicode Standard up to
Unicode 15.0.0, released 13 Sept 2022.
In order to accommodate this update, strconv/isPrint has been updated to
reflect changes in printable characters.
Also changed is template/exec_test.go for both text and html packages- in
the test "TestJSEscaping", rune U+FDFF was used as a placeholder for an
unprintable character. This codepoint was assigned and made printable in
Unicode 14.0.0, breaking this test. It has been replaced with the assigned
and never-printable U+FFFE to fix the test and provide resiliency in the
future.
This upgrade bypasses Unicode 14.0.0, but is compatible.
Updates https://github.com/golang/go/issues/48621
Fixes https://github.com/golang/go/issues/55079
Change-Id: I40efd097eb746db0727ebf7437280916d1242e47
GitHub-Last-Rev: c8885cab7a
GitHub-Pull-Request: golang/go#57265
Reviewed-on: https://go-review.googlesource.com/c/go/+/456837
Reviewed-by: Robert Griesemer <gri@google.com>
Run-TryBot: Rob Pike <r@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Robert Griesemer <gri@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Rob Pike <r@golang.org>
Since log is already responsible for managing its own buffers
it is unfortunate that it calls fmt.Sprintf, which allocates,
only to append that intermediate string to another buffer.
Instead, use the new fmt.Append variants and avoid the allocation.
We modify Logger.Output to wrap an internal Logger.output,
which can be configured to use a particular append function.
Logger.output is called from all the other functionality instead.
This has the further advantage of simplifying the isDiscard check,
which occurs to avoid the costly fmt.Print call.
We coalesce all 6 checks as just 1 check in Logger.output.
Also, swap the declaration order of Logger.Print and Logger.Printf
to match the ordering elsewhere in the file.
Performance:
name old time/op new time/op delta
Println 188ns ± 2% 172ns ± 4% -8.39% (p=0.000 n=10+10)
PrintlnNoFlags 139ns ± 1% 116ns ± 1% -16.71% (p=0.000 n=9+9)
name old allocs/op new allocs/op delta
Println 1.00 ± 0% 0.00 -100.00% (p=0.000 n=10+10)
PrintlnNoFlags 1.00 ± 0% 0.00 -100.00% (p=0.000 n=10+10)
Change-Id: I79d0ee404df848beb3626fe863ccc73a3e2eb325
Reviewed-on: https://go-review.googlesource.com/c/go/+/464345
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Run-TryBot: Joseph Tsai <joetsai@digital-static.net>
TryBot-Result: Gopher Robot <gobot@golang.org>
Same as CL 436436, but for hashfor.
However, this passes toolstash-check, because the order of compiling
functions do not change.
Change-Id: Icc7d042e9c28b0fe4bb40a2b98b7f60cf3549bd1
Reviewed-on: https://go-review.googlesource.com/c/go/+/436961
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Those functions are defined in package runtime already, so just use them
instead of creating ONAME nodes with nil Func.
Change-Id: If29814a5254793c578c15b70f9c194b7414911d4
Reviewed-on: https://go-review.googlesource.com/c/go/+/436959
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
