Saw this failing on windows like this:
--- FAIL: TestRenameCaseDifference (2.96s)
--- FAIL: TestRenameCaseDifference/dir (1.64s)
testing.go:1226: TempDir RemoveAll cleanup: remove C:\Users\gopher\AppData\Local\Temp\1\TestRenameCaseDifferencedir1375918868\001: The process cannot access the file because it is being used by another process.
--- FAIL: TestRenameCaseDifference/file (1.32s)
testing.go:1226: TempDir RemoveAll cleanup: remove C:\Users\gopher\AppData\Local\Temp\1\TestRenameCaseDifferencefile3272269402\001: The process cannot access the file because it is being used by another process.
FAIL
The reason might be the directory fd is not closed. This may be
mitigated by retries in removeAll function from testing package,
but apparently it does not succeed all the time.
A link to the failed run which made me look into this: https://ci.chromium.org/ui/p/golang/builders/try/gotip-windows-386/b8770439049015378129/overview
Change-Id: Ibebe94958d1aef8d1d0eca8a969675708cd27a7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/527175
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Kirill Kolyshkin <kolyshkin@gmail.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Rob Pike <r@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
This is a follow up of CL 526496.
Change-Id: I9f351951bf975e31befd36b9c951d195d2f8f9f7
GitHub-Last-Rev: 4307adafbf
GitHub-Pull-Request: golang/go#62590
Reviewed-on: https://go-review.googlesource.com/c/go/+/527576
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Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This CL implements a decision tree for efficient routing.
The tree holds all the registered patterns. To match
a request, we walk the tree looking for a match.
Change-Id: I7ed1cdf585fc95b73ef5ca2f942f278100a90583
Reviewed-on: https://go-review.googlesource.com/c/go/+/527315
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This constructs a zero value of any type, which helps address some
corner case scenarios.
It should also eventually handle the predeclared "zero" value, at
least as currently implemented in go.dev/cl/520336.
For #61372.
Change-Id: I3a86a94fd8fa388c9c6bf281da8aa532b3da00fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/527696
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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The unified export data format doesn't rely on embedding version
numbers in local variable names anymore, so there's no need to look
for them.
While here, simplify the checking for "~r" or "~b" to just "~",
because the next commit is going to eliminate "~b", but introduce
"~p".
Change-Id: I3ac73150ee561c66356a0c4aee5290b44a4893ee
Reviewed-on: https://go-review.googlesource.com/c/go/+/527695
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Than McIntosh <thanm@google.com>
When two callees have equal weight, we need to sort by another criteria
to ensure that we get stable output.
Note that this is only for the CallStat debug JSON output. The actual
callee selection already does this secondary sort in
findHotConcreteCallee.
Change-Id: I0de105623c5ccc793ca6f5799ea25e57bc286722
Reviewed-on: https://go-review.googlesource.com/c/go/+/527796
Auto-Submit: Michael Pratt <mpratt@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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If _XOPEN_SOURCE is defined, then netbsd also requires
_XOPEN_SOURCE_EXTENDED to define stack_t.
For #62440.
Change-Id: Ib05658c3ca7fae1f6b051566e713ce7bc7c037a0
Reviewed-on: https://go-review.googlesource.com/c/go/+/527775
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The code meant to check if it is the last section, which is
i === len(md.textsectmap)-1. The -1 was missing.
Change-Id: Ifbb9e40df730abe3bec20fde5f56f5c75dfd9e8f
Reviewed-on: https://go-review.googlesource.com/c/go/+/527795
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Our goal for the new ServeMux patterns is to match the routing
performance of the existing ServeMux patterns. To achieve that
we needed to optimize lookup for small maps.
This CL introduces a simple data structure called a mapping that
optimizes lookup by using a slice for small collections of key-value
pairs, switching to a map when the collection gets large.
Mappings are a core part of the routing algorithm, which uses a
decision tree to match path elements. The children of a tree node are
held in a mapping.
Change-Id: I923b3ad1376ace2c3e3421aa9b802ad12d47c871
Reviewed-on: https://go-review.googlesource.com/c/go/+/526617
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Reviewed-by: Damien Neil <dneil@google.com>
Add the conflictsWith method, which determines whether two patterns
conflict with each other.
Updates #61410.
Change-Id: Id4f9a471dc9d0420d927a68d2864128a096b74f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/526616
Run-TryBot: Jonathan Amsterdam <jba@google.com>
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Reviewed-by: Damien Neil <dneil@google.com>
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[This is a redo of CL 525455 with the test fixed on darwin by defining
_XOPEN_SOURCE, and disabled with android, musl, and openbsd, which do
not provide getcontext.]
Since CL 495855, Ms are cached for C threads calling into Go, including
the stack bounds of the system stack.
Some C libraries (e.g., coroutine libraries) do manual stack management
and may change stacks between calls to Go on the same thread.
Changing the stack if there is more Go up the stack would be
problematic. But if the calls are completely independent there is no
particular reason for Go to care about the changing stack boundary.
Thus, this CL allows the stack bounds to change in such cases. The
primary downside here (besides additional complexity) is that normal
systems that do not manipulate the stack may not notice unintentional
stack corruption as quickly as before.
Note that callbackUpdateSystemStack is written to be usable for the
initial setup in needm as well as updating the stack in cgocallbackg.
Fixes#62440.
For #62130.
Change-Id: I0fe0134f865932bbaff1fc0da377c35c013bd768
Reviewed-on: https://go-review.googlesource.com/c/go/+/527715
Run-TryBot: Michael Pratt <mpratt@google.com>
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This patch fixes an inconsistency in compiler flag handling introduced
accidentally in CL 521699. In the compiler we have both base.Flag.N
(which records whether the user has supplied the "-N" flag to disable
optimization) and base.Ctxt.Flag_optimize (which tracks whether
optimization is turned on). In this case Flag.N was updated without a
corresponding change to Ctxt.Flag_optimize, which led to problems with
DWARF generation for the runtime.
This CL doesn't include a regression test; a test will be added later
in the x/debug repo in a subsequent CL.
Updates #62523.
Change-Id: I0c383bb43ec0a0e7c12e7e2852c0590731416d6f
Reviewed-on: https://go-review.googlesource.com/c/go/+/527319
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Alessandro Arzilli <alessandro.arzilli@gmail.com>
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This CL fixes the links to Microsoft documentation in the Go source
code. Some links were broken and some others were outdated.
Change-Id: I4c3bcd3aa3c07a31be1b7f94c25339dcc2e771e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/527556
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Auto-Submit: Quim Muntal <quimmuntal@gmail.com>
Same as CL 526397, but for typecheck.
Change-Id: Ia8f19a54ffaa2ae3b86a4c66cbe6d973482796cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/526236
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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The unified frontend diasmbiguates local types by putting vargen
directly into their symbol name instead. We no longer need a separate
int field for it.
Change-Id: I556c588ed68c5e2cb324cd46abd934894b5aaef9
Reviewed-on: https://go-review.googlesource.com/c/go/+/527517
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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Field.Sym now always contains the original symbol as it appeared in Go
source, so we don't need OrigSym anymore.
Instead, when the mangled name is desired, Field.Nname.Sym() can be
used instead, which is always non-nil if Nname is non-nil.
Change-Id: I96cd61db6458d4a2e07ec5810239236e3dfba747
Reviewed-on: https://go-review.googlesource.com/c/go/+/527516
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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Currently, linking a Go c-shared object with C code using Apple's
new linker, it fails with
% cc a.c go.so
ld: segment '__DWARF' filesize exceeds vmsize in 'go.so'
Apple's new linker has more checks for unmapped segments. It is
very hard to make it accept a Mach-O shared object with an
additional DWARF segment.
We may want to stop combinding DWARF into the shared object (see
also #62577). For now, disable DWARF by default in c-shared mode
on darwin. (One can still enable it with -ldflags=-w=0, which will
contain DWARF, but it will need the old C linker to link against
with.)
For #61229.
Change-Id: I4cc77da54fac10e2c2cbcffa92779cba82706d75
Reviewed-on: https://go-review.googlesource.com/c/go/+/527415
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types2 has already checked for us that bare returns are valid, so no
need to duplicate the effort in typecheck.
Change-Id: I13b2387173966ba44058fbc841327896e04184e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/527515
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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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
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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All of riscv CPU using 64B for cache-line size.
i.e. U540 of Hifive Unleashed (https://www.sifive.com/boards/hifive-unleashed)
Change-Id: I0d72d88ac026f45383c3b3eb3a77233d3c2e4004
Reviewed-on: https://go-review.googlesource.com/c/go/+/526659
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This reverts CL 512155.
Reason for revert: CL 512155 introduced a race in that it caused
cmd.Start to set cmd.Path. Previously it was fine if code looked
at cmd.Path in one goroutine while calling cmd.Start in a different
goroutine.
A test case for this race is in CL 527495.
Change-Id: Ic18fdadf6763727f8ea748280d5f0e601b9bf374
Reviewed-on: https://go-review.googlesource.com/c/go/+/527337
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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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
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Keith Randall <khr@google.com>
Previously, the unified frontend implemented unsafe.Sizeof, etc that
involved derived types by constructing a normal OSIZEOF, etc
expression, including fully instantiating their argument. (When
unsafe.Sizeof is applied to a non-generic type, types2 handles
constant folding it.)
This worked, but involves unnecessary work, since all we really need
to track is the argument type (and the field selections, for
unsafe.Offsetof).
Further, the argument expression could generate temporary variables,
which would then go unused after typecheck replaced the OSIZEOF
expression with an OLITERAL. This results in compiler failures after
CL 523315, which made later passes stricter about expecting the
frontend to not construct unused temporaries.
Fixes#62515.
Change-Id: I37baed048fd2e35648c59243f66c97c24413aa94
Reviewed-on: https://go-review.googlesource.com/c/go/+/527097
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
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Currently, cmd/compile optimizes `var a = true; var b = a` into `var a
= true; var b = true`. But this may not be safe if we need to
initialize any other global variables between `a` and `b`, and the
initialization involves calling a user-defined function that reassigns
`a`.
This CL changes staticinit to keep track of the initialization
expressions that we've seen so far, and to stop applying the
staticcopy optimization once we've seen an initialization expression
that might have modified another global variable within this package.
To help identify affected initializers, this CL adds a -d=staticcopy
flag to warn when a staticcopy is suppressed and turned into a dynamic
copy.
Currently, `go build -gcflags=all=-d=staticcopy std` reports only four
instances:
```
encoding/xml/xml.go:1600:5: skipping static copy of HTMLEntity+0 with map[string]string{...}
encoding/xml/xml.go:1869:5: skipping static copy of HTMLAutoClose+0 with []string{...}
net/net.go:661:5: skipping static copy of .stmp_31+0 with poll.ErrNetClosing
net/http/transport.go:2566:5: skipping static copy of errRequestCanceled+0 with ~R0
```
Fixes#51913.
Change-Id: Iab41cf6f84c44f7f960e4e62c28a8aeaade4fbcf
Reviewed-on: https://go-review.googlesource.com/c/go/+/395541
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: David Chase <drchase@google.com>
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Currently, package runtime runs `osinit` before dynamic initialization
of package-scope variables; but on GOOS=linux, `osinit` involves
mutating `sigsetAllExiting`.
This currently works because cmd/compile and gccgo have
non-spec-conforming optimizations that statically initialize
`sigsetAllExiting`, but disabling that optimization causes
`sigsetAllExiting` to be dynamically initialized instead. This in turn
causes the mutations in `osinit` to get lost.
This CL moves the initialization of `sigsetAllExiting` from `osinit`
into its initialization expression, and then removes the special case
for continuing to perform the static-initialization optimization for
package runtime.
Updates #51913.
Change-Id: I3be31454277c103372c9701d227dc774b2311dad
Reviewed-on: https://go-review.googlesource.com/c/go/+/405549
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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This was missed earlier, because NewConstAt is only used now to
construct the predeclared "true" and "false" constants. But these
constants are no longer actually accessed with unified IR.
For constant expressions, types2 (and go/types) sets
TypeAndValue.Value for the expression to the appropriate constant
value. The unified writer recognizes when expressions are constants,
and simply writes the underlying value, regardless of the original
expression. As a result, we never end up actually referencing the
*named* "true" and "false" constants; we just always construct
anonymous constant "true" and "false" values.
However, a manually constructed tree that includes an *ir.Name that
"Uses" the predeclared true/false Const Objects, yet doesn't set
TypeAndValue.Value will instead end up trying to use named constants
constructed with NewConstAt.
Thanks to Russ for reporting the issue on CL 510541, and to Cuong for
identifying the fix.
Change-Id: I0614105379d63ea76d7244ebd1e4db5c239d4670
Reviewed-on: https://go-review.googlesource.com/c/go/+/524357
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
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This is the first of several CLs implementing the proposal
for enhanced ServeMux routing, https://go.dev/issue/61410.
Define a type to represent extended routing patterns and a function to
parse a string into one.
Updates #61410.
Change-Id: I779689acf1f14b20d12c9264251f7dc002b68c49
Reviewed-on: https://go-review.googlesource.com/c/go/+/526815
Run-TryBot: Jonathan Amsterdam <jba@google.com>
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Fix a regression test to use the correct new signature for
ir.NewBasicLit.
Change-Id: I06c849e83a5edfce784c780b5490f461f6c3b129
Reviewed-on: https://go-review.googlesource.com/c/go/+/527318
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
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This reverts CL 525455. The test fails to build on darwin, alpine, and
android.
For #62440.
Change-Id: I39c6b1e16499bd61e0f166de6c6efe7a07961e62
Reviewed-on: https://go-review.googlesource.com/c/go/+/527317
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This reverts CL 527056.
CL 525455 breaks darwin, alpine, and android. This CL must be reverted
in order to revert that CL.
For #62440.
Change-Id: I4e1b16e384b475a605e0214ca36c918d50faa22c
Reviewed-on: https://go-review.googlesource.com/c/go/+/527316
Reviewed-by: Cherry Mui <cherryyz@google.com>
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This is a partial revert of CL 526118.
NetBSD uses mp.procid in locking (semawake). unminit is called
surprisingly early in mexit, and there is definitely locking after that
point, so it isn't safe to clear procid so early.
Fixes#62524.
Fixes#62531.
Change-Id: Iefbef63e84fc0395e255970a301401e1187a910d
Reviewed-on: https://go-review.googlesource.com/c/go/+/527057
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
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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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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
When creating the struct type to hold variables captured by a function
literal, we currently reuse the captured variable names as fields.
However, there's no particular reason to do this: these struct types
aren't visible to users, and it adds extra complexity in making sure
fields belong to the correct packages.
Further, it turns out we were getting that subtly wrong. If two
function literals from different packages capture variables with
identical names starting with an uppercase letter (and in the same
order and with corresponding identical types) end up in the same
function (e.g., due to inlining), then we could end up creating
closure struct types that are "different" (i.e., not types.Identical)
yet end up with equal LinkString representations (which violates
LinkString's contract).
The easy fix is to just always use simple, exported, generated field
names in the struct. This should allow further struct reuse across
packages too, and shrink binary sizes slightly.
Fixes#62498.
Change-Id: I9c973f5087bf228649a8f74f7dc1522d84a26b51
Reviewed-on: https://go-review.googlesource.com/c/go/+/527135
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Standard Ms set g0.stackguard1 to the same value as stackguard0 in
mstart0. For consistency, extra Ms should do the same for their g0. Do
this in needm -> callbackUpdateSystemStack.
Background: getg().stackguard1 is used as the stack guard for the stack
growth prolouge in functions marked //go:systemstack [1]. User Gs set
stackguard1 to ^uintptr(0) so that the check always fail, calling
morestackc, which throws to report a //go:systemstack function call on a
user stack.
g0 setting stackguard1 is unnecessary for this functionality. 0 would be
sufficient, as g0 is always allowed to call //go:systemstack functions.
However, since we have the check anyway, setting stackguard1 to the
actual stack bound is useful to detect actual stack overflows on g0
(though morestackc doesn't detect this case and would report a
misleading message about user stacks).
[1] cmd/internal/obj calls //go:systemstack functions AttrCFunc. This is
a holdover from when the runtime contained actual C functions. But since
CL 2275, it has simply meant "pretend this is a C function, which would
thus need to use the system stack". Hence the name morestackc. At this
point, this terminology is pretty far removed from reality and should
probably be updated to something more intuitive.
Change-Id: I8d0e5628ce31ac6a189a7d7a4124be85aef89862
Reviewed-on: https://go-review.googlesource.com/c/go/+/527056
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Since CL 495855, Ms are cached for C threads calling into Go, including
the stack bounds of the system stack.
Some C libraries (e.g., coroutine libraries) do manual stack management
and may change stacks between calls to Go on the same thread.
Changing the stack if there is more Go up the stack would be
problematic. But if the calls are completely independent there is no
particular reason for Go to care about the changing stack boundary.
Thus, this CL allows the stack bounds to change in such cases. The
primary downside here (besides additional complexity) is that normal
systems that do not manipulate the stack may not notice unintentional
stack corruption as quickly as before.
Note that callbackUpdateSystemStack is written to be usable for the
initial setup in needm as well as updating the stack in cgocallbackg.
Fixes#62440.
For #62130.
Change-Id: I7841b056acea1111bdae3b718345a3bd3961b4a8
Reviewed-on: https://go-review.googlesource.com/c/go/+/525455
Run-TryBot: Michael Pratt <mpratt@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Like sort.Search, use "h := int(uint(i+j) >> 1)" style code to calculate
the median.
Change-Id: Ifb1a19dde1c6ed6c1654bc642fc9565a8b6c5fc4
GitHub-Last-Rev: e2213b7388
GitHub-Pull-Request: golang/go#62503
Reviewed-on: https://go-review.googlesource.com/c/go/+/526496
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
ir.ConstExpr was deleted in CL 526395, so no need to check for it.
Fixes the build error.
Change-Id: I642dab70d17369bc7c9ae880666ef42ff099b770
Reviewed-on: https://go-review.googlesource.com/c/go/+/526196
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
This reverts commit http://go.dev/cl/c/go/+/526915
Reason for revert: darwin builders unhappy with '-Wunaligned-access' C compiler flag
Change-Id: I5e6ca7c9a0ca08b7e758b7f603da70a2fca79b58
Reviewed-on: https://go-review.googlesource.com/c/go/+/526978
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Auto-Submit: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
The new inliner tries to de-prioritize inlining of call sites on panic
paths, e.g. for a call such as the one to "foo" below, the inliner
will use a much lower size threshold when deciding whether to inline,
since the path is very likely to be "cold".
if mumble() {
foo() <<-- here
panic("bad")
}
This patch reworks one of the traceback tests is relying on the old
inliner's "inline F everywhere if F inlinable" strategy by tweaking
the code slightly (no change in test functionality).
Change-Id: I83a686b0cc4d94a6cfc63d1e84e45455c1afd5b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/519196
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Assign scores to callsites based on previously computed function
properties and callsite properties. This currently works by taking the
size score for the function (as computed by CanInline) and then making
a series of adjustments, positive or negative based on various
function and callsite properties.
NB: much work also remaining on deciding what are the best score
adjustment values for specific heuristics. I've picked a bunch of
arbitrary constants, but they will almost certainly need tuning and
tweaking to arrive at something that has good performance.
Updates #61502.
Change-Id: I887403f95e76d7aa2708494b8686c6026861a6ed
Reviewed-on: https://go-review.googlesource.com/c/go/+/511566
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Add code to detect call sites that are nested in loops, call sites
that are on an unconditional path to panic/exit, and call sites within
"init" functions. The panic-path processing reuses some of the
logic+state already present for the function flag version of "calls
panic/exit".
Updates #61502.
Change-Id: I1d728e0763282d3616a9cbc0a07c5cda115660f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/511565
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Build up a table of (potentially) inlinable call sites during inline
heuristic analysis, and introduce a framework for analyzing each call
site to collect applicable flags (for example, is call nested in
loop). This patch doesn't include any of the flag analysis, just the
machinery to collect the callsites and a regression test harness.
Updates #61502.
Change-Id: Ieaf4a008ac9868e9762c63f5b59bd264dc71ab30
Reviewed-on: https://go-review.googlesource.com/c/go/+/511564
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Extend the code that computes various properties and parameter flags
to incorporate information from export data in addition to things we
can get from the current package. Specifically:
- when deciding whether the current function always calls panic/exit,
check to see whether it has an unconditional call to some other
function that has that flag.
- when computing "parameter feeds" properties, look not just for
cases where a parameter feeds an interesting construct (if/switch,
indirect/interface call, etc) but where it feeds a call whose
corresponding param has that flag.
- when computing return properties, if a given return is always the
results of a call to X, then set the return properties to those
of X.
Updates #61502.
Change-Id: I6472fe98759cccad05b8eed58e4fc568201d88ad
Reviewed-on: https://go-review.googlesource.com/c/go/+/511563
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Augment the ir.Inline container to include an entry for function
properties (currently serialized as a string), and if
GOEXPERIMENT=newinliner is set, compute and store function
properties for all inline candidates processed by the inliner.
The idea here is that if the function properties are going to drive
inlining decisions, we'd like to have the same info from non-local /
imported functions as for local / in-package functions, hence we need
to include the properties in the export data.
Hand testing on the compiler itself and with k8s kubelet shows that
this increases the size of export data overall by about 2-3 percent,
so a pretty modest increase.
Updates #61502.
Change-Id: I9d1c311aa8418d02ffea3629c3dd9d8076886d15
Reviewed-on: https://go-review.googlesource.com/c/go/+/511562
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Add code to analyze properties of function params, specifically
heuristics to look for cases where unmodified params feed into "if"
and "switch" statements in ways that might enable constant folding
and/or dead code elimination if the call were inlined at a callsite
that passes a constant to the correct param. We also look for cases
where a function parameter feeds unmodified into an interface method
call or indirect call.
Updates #61502.
Change-Id: Iaf7297e19637daeabd0ec72be88d654b545546ae
Reviewed-on: https://go-review.googlesource.com/c/go/+/511561
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
