This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: I8e325d75f553b5d0b6224b56a705d2e2cb895de4
Reviewed-on: https://go-review.googlesource.com/36199
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: I2d0ccdb84814537ab8b8842aa1b5f5bc0a88a0fc
Reviewed-on: https://go-review.googlesource.com/36198
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: Icdd181098f9f0e81f68bf201e6867cdd8f820300
Reviewed-on: https://go-review.googlesource.com/36197
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: Ic802483e50598def638f1e2e706d5fdf7822d32d
Reviewed-on: https://go-review.googlesource.com/36196
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: I20dbc352c3df3c83a75811dd8e78c580a46b2202
Reviewed-on: https://go-review.googlesource.com/36195
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: I4cf05b076d81b780c87a31378523929b5da8964b
Reviewed-on: https://go-review.googlesource.com/36194
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: I7c5dde6e7fe4f390e6607303b4d42535c674eac3
Reviewed-on: https://go-review.googlesource.com/36193
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: I6ee5b053683034ea9462a9a0a4ea4f5ad24fa5a1
Reviewed-on: https://go-review.googlesource.com/36192
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: Icb3f168ade91e7da5fcab89ac75b768daefff359
Reviewed-on: https://go-review.googlesource.com/36191
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This is one CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: I63f578f5ac99c707b599ac5659293c46b275567d
Reviewed-on: https://go-review.googlesource.com/36190
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This CL makes a few naming changes to break dependencies
between different parts of the go command, to make it easier
to split into different packages.
This is the first CL in a long sequence of changes to break up the
go command from one package into a plausible group of packages.
This sequence is concerned only with moving code, not changing
or cleaning up code. There will still be more cleanup after this sequence.
The entire sequence will be submitted together: it is not a goal
for the tree to build at every step.
For #18653.
Change-Id: I69a98b9ea48e61b1e1cda95273d29860b525415f
Reviewed-on: https://go-review.googlesource.com/36129
Reviewed-by: David Crawshaw <crawshaw@golang.org>
If there is a defer, and that defer recovers, then the caller
can see all of the output parameters. That means that we must
mark all the output parameters live at any point which might panic.
If there is no defer then this is not necessary. This is implemented.
We could also detect whether there is a recover in any of the defers.
If not, we would need to mark only output params that the defer
actually references (and the closure mechanism already does that).
This is not implemented.
Fixes#18860.
Change-Id: If984fe6686eddce9408bf25e725dd17fc16b8578
Reviewed-on: https://go-review.googlesource.com/36030
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
These rules trigger 116 times while running make.bash.
And at least for the sample code at
https://github.com/golang/go/issues/18906#issuecomment-277174241
they are providing optimizations not already present
in amd64.
Updates #18906
Change-Id: I410a480f566f5ab176fc573fb5ac74f9cffec225
Reviewed-on: https://go-review.googlesource.com/36217
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Use (-x)>>63 instead of ((x-1)>>63)^-1 to get a mask that
is 0 when x is 0 and all ones when x is positive.
Saves one instruction when slicing.
Change-Id: Ib46d53d3aac6530ac481fa2f265a6eadf3df0567
Reviewed-on: https://go-review.googlesource.com/35641
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Instead of always appending to c.Values,
choose whichever slice is larger;
b.Values will be set to nil anyway.
Appending once instead of in a loop also
limits slice growth to once per function call
and is more efficient.
Reduces max rss for the program in #18602 by 6.5%,
and eliminates fuseBlockPlain from the alloc_space
pprof output. fuseBlockPlain previously accounted
for 16.74% of allocated memory.
Updates #18602.
Change-Id: I417b03722d011a59a679157da43dc91f4425210e
Reviewed-on: https://go-review.googlesource.com/35114
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Remove rotate generation from walk. Remove OLROT and ssa.Lrot* opcodes.
Generate rotates during SSA lowering for architectures that have them.
This CL will allow rotates to be generated in more situations,
like when the shift values are determined to be constant
only after some analysis.
Fixes#18254
Change-Id: I8d6d684ff5ce2511aceaddfda98b908007851079
Reviewed-on: https://go-review.googlesource.com/34232
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Intrinsics are ok to inline as they don't rewrite to actual calls.
Change-Id: Ieb19c834c61579823c62c6d1a1b425d6c4d4de23
Reviewed-on: https://go-review.googlesource.com/34272
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
When we discover a relation x <= len(s), also discover the relation
x <= cap(s). That way, in situations like:
a := s[x:] // tests 0 <= x <= len(s)
b := s[:x] // tests 0 <= x <= cap(s)
the second check can be eliminated.
Fixes#16813
Change-Id: Ifc037920b6955e43bac1a1eaf6bac63a89cfbd44
Reviewed-on: https://go-review.googlesource.com/33633
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alexandru Moșoi <alexandru@mosoi.ro>
Reviewed-by: David Chase <drchase@google.com>
CSE opportunities were being missed for commutative ops. We used to
order the args of commutative ops (by arg ID) once at the start of CSE.
But that may not be enough.
i1 = (Load ptr mem)
i2 = (Load ptr mem)
x1 = (Add i1 j)
x2 = (Add i2 j)
Equivalent commutative ops x1 and x2 may not get their args ordered in
the same way because because at the start of CSE, we don't know that
the i values will be CSEd. If x1 and x2 get opposite orders we won't
CSE them.
Instead, (re)order the args of commutative operations by their
equivalence class IDs each time we partition an equivalence class.
Change-Id: Ic609fa83b85299782a5e85bf93dc6023fccf4b0c
Reviewed-on: https://go-review.googlesource.com/33632
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Todd Neal <todd@tneal.org>
Fixes#10561.
Provides a better diagnostic message for failed type switch
satisfaction in the case that a value receiver is being used
in place of the pointer receiver that implements and satisfies
the interface.
Change-Id: If8c13ba13f2a8d81bf44bac7c3a66c12921ba921
Reviewed-on: https://go-review.googlesource.com/35235
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Change-Id: Ib2c1490a42e3485913a05a0b2fecdcc425d42871
Reviewed-on: https://go-review.googlesource.com/36083
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Fixes#8481.
Inform the user that init functions cannot be directly invoked
in user code, as mandated by the spec at:
http://golang.org/ref/spec#Program_initialization_and_execution.
Change-Id: Ib12c0c08718ffd48b76b6f9b13c76bb6612d2e7b
Reviewed-on: https://go-review.googlesource.com/34790
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Fixes#15055.
Updates exprfmt printing using fmt verb "%v" to check that n.Left
is non-nil before attempting to print it, otherwise we'll print
the nodes in the list using verb "%.v".
Credit to @mdempsky for this approach and for finding
the root cause of the issue.
Change-Id: I20a6464e916dc70d5565e145164bb9553e5d3865
Reviewed-on: https://go-review.googlesource.com/25361
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The binary export format embeds type definitions inline as necessary,
so there's no need to add them to exportlist. Also, constants are
embedded directly by value, so they can be omitted too.
Change-Id: Id1879eb97c298a5a52f615cf9883c346c7f7bd69
Reviewed-on: https://go-review.googlesource.com/36170
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
When switching to the new parser, I changed cmd/compile to handle iota
per an intuitive interpretation of how nested constant declarations
should work (which also matches go/types).
Note: if we end up deciding that the current spec wording is
intentional (i.e., confirming gccgo's current behavior), the test will
need to be updated to expect 4 instead of 1.
Updates #15550.
Change-Id: I441f5f13209f172b73ef75031f2a9daa5e985277
Reviewed-on: https://go-review.googlesource.com/36122
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Sometimes STEXT symbols point to the first byte of .data
section, instead of the end of .text section. But, while writing
pe symbol table, we should treat them as if they belong to the
.text section. Change pe symbol table records for these symbols.
Fixes#14710
Change-Id: I1356e61aa8fa37d590d7b1677b2bac214ad0ba4e
Reviewed-on: https://go-review.googlesource.com/35272
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
The comment for maxPtrmaskBytes implied that the value was still 16,
but that changed in CL 10815.
Change-Id: I86e304bc7d9d1a0a6b22b600fefcc1325e4372d9
Reviewed-on: https://go-review.googlesource.com/36120
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Whoever called toint() is expecting the {Mpint, Mpflt, Mpcplx} arg to
be converted to an integer expression, so it never makes sense to
report an error as "constant X truncated to real".
Fixes#11580
Change-Id: Iadcb105f0802358a7f77188c2b1e63fe80c5580c
Reviewed-on: https://go-review.googlesource.com/34638
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Many non-inlineable functions were not being
reported in '-m -m' mode.
Updates #17858.
Change-Id: I7d96361b39dd317f5550e57334a8a6dd1a836598
Reviewed-on: https://go-review.googlesource.com/32971
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
generic.rules wasn't updated when rewritegeneric.go was. This commit
updates it so that the rewritegeneric.go file can be regenerated.
Fixes#18885.
Change-Id: Ie7dab653ca0a9ea1c255fd12e311a0d9e66afdd2
Reviewed-on: https://go-review.googlesource.com/36032
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
By grouping all the logic into constDecl, we're able to get rid of the
lastconst and lasttype globals, and simplify the logic slightly. Still
clunky, but much easier to reason about.
Change-Id: I446696c31084b3bfc1fd5d3651655a81ddd159ab
Reviewed-on: https://go-review.googlesource.com/36023
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Algorithmic improvements here are hard.
Lifting a lookup out of the loop helps a little, though.
To compile the code in #17926:
name old s/op new s/op delta
Real 146 ± 3% 140 ± 4% -3.87% (p=0.002 n=10+10)
User 143 ± 3% 139 ± 4% -3.08% (p=0.005 n=10+10)
Sys 8.28 ±35% 8.08 ±28% ~ (p=0.684 n=10+10)
Updates #17926.
Change-Id: Ic255ac8b7b409c1a53791058818b7e2cf574abe3
Reviewed-on: https://go-review.googlesource.com/33305
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Also adds tests for all missing VRI-a instructions (which may be
affected by this change).
Fixes#18749.
Change-Id: I48249dda626f32555da9ab58659e2e140de6504a
Reviewed-on: https://go-review.googlesource.com/35561
Run-TryBot: Michael Munday <munday@ca.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
For #18130.
f8b4123613 [dev.typealias] spec: use term 'embedded field' rather than 'anonymous field'
9ecc3ee252 [dev.typealias] cmd/compile: avoid false positive cycles from type aliases
49b7af8a30 [dev.typealias] reflect: add test for type aliases
9bbb07ddec [dev.typealias] cmd/compile, reflect: fix struct field names for embedded byte, rune
43c7094386 [dev.typealias] reflect: fix StructOf use of StructField to match StructField docs
9657e0b077 [dev.typealias] cmd/doc: update for type alias
de2e5459ae [dev.typealias] cmd/compile: declare methods after resolving receiver type
9259f3073a [dev.typealias] test: match gccgo error messages on alias2.go
5d92916770 [dev.typealias] cmd/compile: change Func.Shortname to *Sym
a7c884efc1 [dev.typealias] go/internal/gccgoimporter: support for type aliases
5802cfd900 [dev.typealias] cmd/compile: export/import test cases for type aliases
d7cabd40dd [dev.typealias] go/types: clarified doc string
cc2dcce3d7 [dev.typealias] cmd/compile: a few better comments related to alias types
5c160b28ba [dev.typealias] cmd/compile: improved error message for cyles involving type aliases
b2386dffa1 [dev.typealias] cmd/compile: type-check type alias declarations
ac8421f9a5 [dev.typealias] cmd/compile: various minor cleanups
f011e0c6c3 [dev.typealias] cmd/compile, go/types, go/importer: various alias related fixes
49de5f0351 [dev.typealias] cmd/compile, go/importer: define export format and implement importing of type aliases
5ceec42dc0 [dev.typealias] go/types: export TypeName.IsAlias so clients can use it
aa1f0681bc [dev.typealias] go/types: improved Object printing
c80748e389 [dev.typealias] go/types: remove some more vestiges of prior alias implementation
80d8b69e95 [dev.typealias] go/types: implement type aliases
a917097b5e [dev.typealias] go/build: add go1.9 build tag
3e11940437 [dev.typealias] cmd/compile: recognize type aliases but complain for now (not yet supported)
e0a05c274a [dev.typealias] cmd/gofmt: added test cases for alias type declarations
2e5116bd99 [dev.typealias] go/ast, go/parser, go/printer, go/types: initial type alias support
Change-Id: Ia65f2e011fd7195f18e1dce67d4d49b80a261203
The test.bash script in misc/cgo/testsanitizers use GOOS, not GOHOSTOS.
Fix the dist check from gohostos to goos accordingly.
The error was masked on the builders because they run on a darwin host
where the sanitizers tests never ran.
With this change, the Android test suite completes successfully on
Android/amd64.
Change-Id: Id7690429f78c6ac7a26fc9118d913b719b565bb2
Reviewed-on: https://go-review.googlesource.com/35959
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Elias Naur <elias.naur@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Fixes (skips) the test on Android, where stdout/stderr are not
terminals.
Updates #18153
Change-Id: Ieca65150362a5c423747ad751e00f76f0b890746
Reviewed-on: https://go-review.googlesource.com/35957
Run-TryBot: Elias Naur <elias.naur@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Author of CL 35150 forgot to run mkalldocs.sh to update
the autogenerated alldocs.go
Change-Id: Ib824562db6044702456a221a8c6f9af412927a98
Reviewed-on: https://go-review.googlesource.com/35952
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This unwinds a small part of CL 31668: we now accept "./." in cleanImport.
Fixes#18778.
Change-Id: Ia7f1fde1cafcea3cc9e0b597a95a0e0bb410a3ed
Reviewed-on: https://go-review.googlesource.com/35646
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Will also fix type aliases.
Fixes#17766.
For #18130.
Change-Id: I9e1584d47128782152e06abd0a30ef423d5c30d2
Reviewed-on: https://go-review.googlesource.com/35732
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Otherwise we don't emit any required ELF relocations when doing an
external link, because elfrelocsect skips unreachable symbols.
Fixes#18745.
Change-Id: Ia3583c41bb6c5ebb7579abd26ed8689370311cd6
Reviewed-on: https://go-review.googlesource.com/35590
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
A Func's Shortname is just an identifier. No need for an entire ONAME
Node.
Change-Id: Ie4d397e8d694c907fdf924ce57bd96bdb4aaabca
Reviewed-on: https://go-review.googlesource.com/35574
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
The constant propagation rules selected the wrong operand to
propagate. So MOVDNE (move if not equal) propagated operands as if
it were a MOVDEQ (move if equal).
Fixes#18735.
Change-Id: I87ac469172f9df7d5aabaf7106e2936ce54ae202
Reviewed-on: https://go-review.googlesource.com/35498
Run-TryBot: Michael Munday <munday@ca.ibm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
When nilcheck runs, the values in a block are not in any particular
order. So any facts derived from examining the blocks shouldn't be
used until we reach the next block.
This is suboptimal as it won't eliminate nil checks within a block.
But it's probably a better fix for now as it is a much smaller change
than other strategies for fixing this bug.
nilptr3.go changes are mostly because for this pattern:
_ = *p
_ = *p
either nil check is fine to keep, and this CL changes which one
the compiler tends to keep.
There are a few regressions from code like this:
_ = *p
f()
_ = *p
For this pattern, after this CL we issue 2 nil checks instead of one.
(For the curious, this happens because intra-block nil check
elimination now falls to CSE, not nilcheck proper. The former
pattern has two nil checks with the same store argument. The latter
pattern has two nil checks with different store arguments.)
Fixes#18725
Change-Id: I3721b494c8bc9ba1142dc5c4361ea55c66920ac8
Reviewed-on: https://go-review.googlesource.com/35485
Reviewed-by: Cherry Zhang <cherryyz@google.com>
pprof.WriteHeapProfile is shorthand for
pprof.Lookup("heap").WriteTo(f, 0).
The second parameter is debug.
If it is non-zero, pprof writes legacy-format
pprof output, which compilebench can parse.
Fixes#18641
Change-Id: Ica69adeb9809e9b5933aed943dcf4a07910e43fc
Reviewed-on: https://go-review.googlesource.com/35484
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Plus a few minor changes.
For #18130.
Change-Id: Ica6503fe9c888cc05c15b46178423f620c087491
Reviewed-on: https://go-review.googlesource.com/35233
Reviewed-by: Alan Donovan <adonovan@google.com>
The bug subcommand opens up the browser instead of printing information.
Fixes help message to reflect that.
Fixes#18630.
Change-Id: I660c94bc65ef1994292cfd72d08a544699545701
Reviewed-on: https://go-review.googlesource.com/35150
Reviewed-by: Russ Cox <rsc@golang.org>
It looks like it should be there, although I couldn't find a test
case that fails without it. ZeroWB is probably never generated now:
zeroing an initialized heap object is done by making an autotmp on
stack, zeroing it, and copying (typedmemmove) to heap.
Passes "toolstash -cmp" on std.
Change-Id: I702a59759e33fb8cc2a34a3b3029e7540aca080a
Reviewed-on: https://go-review.googlesource.com/35250
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Conversion to Nodes still happens sequentially at the moment.
Change-Id: I3407ba0711b8b92e22ece0a06fefaff863c3ccc9
Reviewed-on: https://go-review.googlesource.com/35126
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Previously, mkpackage jumbled together three unrelated tasks: handling
package declarations, clearing imports from processing previous source
files, and assigning a default value to outfile.
Change-Id: I1e124335768aeabfd1a6d9cc2499fbb980d951cf
Reviewed-on: https://go-review.googlesource.com/35124
Reviewed-by: Robert Griesemer <gri@golang.org>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Another change in behvaior (bug) in LLDB. Despite the fact that
LLDB can dump the symtab of our test binaries and show the function
addresses, it can no longer call the functions. This means the chdir
trick on signal is failing.
This CL uses a new trick. For iOS, the exec script passes the change
in directory as an argument, and it is processed early by the test
harness generated by cmd/go.
For the iOS builders.
Change-Id: I8f5d0f831fe18de99f097761f89c5184d5bf2afb
Reviewed-on: https://go-review.googlesource.com/35152
Reviewed-by: Elias Naur <elias.naur@gmail.com>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
C-only symbols are excluded from pclntab because of a quirk of darwin,
where functions are referred to by an exported symbol so dynamic
relocations de-duplicate to the host binary module and break unwinding.
This doesn't happen on ELF systems because the linker always refers to
unexported module-local symbols, so we don't need this condition.
And the current logic for excluding some functions breaks the module
verification code in moduledataverify1. So disable this for plugins
on linux.
(In 1.9, it will probably be necessary to introduce a module-local
symbol reference system on darwin to fix a different bug, so all of
this onlycsymbol code made be short-lived.)
With this CL, the tests in CL 35116 pass.
Change-Id: I517d7ca4427241fa0a91276c462827efb9383be9
Reviewed-on: https://go-review.googlesource.com/35190
Reviewed-by: Michael Hudson-Doyle <michael.hudson@canonical.com>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Known issue: #18640 (requires a bit more work, I believe).
For #18130.
Change-Id: I53dc26012070e0c79f63b7c76266732190a83d47
Reviewed-on: https://go-review.googlesource.com/35129
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Known issues:
- needs many more tests
- duplicate method declarations via type alias names are not detected
- type alias cycle error messages need to be improved
- need to review setup of byte/rune type aliases
For #18130.
Change-Id: Icc2fefad6214e5e56539a9dcb3fe537bf58029f8
Reviewed-on: https://go-review.googlesource.com/35121
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
The iOS test harness has set a breakpoint early in the life of Go
programs so that it can change the current working directory using
information only available from the host debugger. Somewhere in the
upgrade to iOS 10 / XCode 8.2, breakpoints stopped working. This
may be an LLDB bug, or a bug in the ios-deploy LLDB scripts, it's
not clear.
Work around the problem by giving up on breakpoints. Instead, early
in the life of every test binary built for iOS, send (and ignore) a
SIGUSR2 signal. The debugger will catch this, giving the script
go_darwin_arm_exec a chance to change the working directory.
For the iOS builders.
Change-Id: I7476531985217d0c76bc176904c48379210576c2
Reviewed-on: https://go-review.googlesource.com/34926
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This reduces compilation time for the program
in #18602 from 7 hours to 30 min.
Updates #14781
Updates #18602
Change-Id: I3c4af878a08920e6373d3b3b0c4453ee002e32eb
Reviewed-on: https://go-review.googlesource.com/35113
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Also: Don't allow type pragmas with type alias declarations.
For #18130.
Change-Id: Ie54ea5fefcd677ad87ced03466bbfd783771e974
Reviewed-on: https://go-review.googlesource.com/35102
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
cmd/compile:
- remove crud from prior alias implementation
- better comments in places
go/types:
- fix TypeName.IsAlias predicate
- more tests
go/importer (go/internal/gcimporter15):
- handle "@" format for anonymous fields using aliases
(currently tested indirectly via x/tools/gcimporter15 tests)
For #18130.
Change-Id: I23a6d4e3a4c2a5c1ae589513da73fde7cad5f386
Reviewed-on: https://go-review.googlesource.com/35101
Reviewed-by: Alan Donovan <adonovan@google.com>
This defines the (tentative) export/import format for type aliases.
The compiler doesn't support type aliases yet, so while the code is present
it is guarded with a flag.
The export format for embedded (anonymous) fields now has three modes (mode 3 is new):
1) The original type name and the anonymous field name are the same, and the name is exported:
we don't need the field name and write "" instead
2) The original type name and the anonymous field name are the same, and the name is not exported:
we don't need the field name and write "?" instead, indicating that there is package info
3) The original type name and the anonymous field name are different:
we do need the field name and write "@" followed by the field name (and possible package info)
For #18130.
Change-Id: I790dad826757233fa71396a210f966c6256b75d3
Reviewed-on: https://go-review.googlesource.com/35100
Reviewed-by: Alan Donovan <adonovan@google.com>
XPos is a compact (8 instead of 16 bytes on a 64bit machine) source
position representation. There is a 1:1 correspondence between each
XPos and each regular Pos, translated via a global table.
In some sense this brings back the LineHist, though positions can
track line and column information; there is a O(1) translation
between the representations (no binary search), and the translation
is factored out.
The size increase with the prior change is brought down again and
the compiler speed is in line with the master repo (measured on
the same "quiet" machine as for prior change):
name old time/op new time/op delta
Template 256ms ± 1% 262ms ± 2% ~ (p=0.063 n=5+4)
Unicode 132ms ± 1% 135ms ± 2% ~ (p=0.063 n=5+4)
GoTypes 891ms ± 1% 871ms ± 1% -2.28% (p=0.016 n=5+4)
Compiler 3.84s ± 2% 3.89s ± 2% ~ (p=0.413 n=5+4)
MakeBash 47.1s ± 1% 46.2s ± 2% ~ (p=0.095 n=5+5)
name old user-ns/op new user-ns/op delta
Template 309M ± 1% 314M ± 2% ~ (p=0.111 n=5+4)
Unicode 165M ± 1% 172M ± 9% ~ (p=0.151 n=5+5)
GoTypes 1.14G ± 2% 1.12G ± 1% ~ (p=0.063 n=5+4)
Compiler 5.00G ± 1% 4.96G ± 1% ~ (p=0.286 n=5+4)
Change-Id: Icc570cc60ab014d8d9af6976f1f961ab8828cc47
Reviewed-on: https://go-review.googlesource.com/34506
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This replaces the src.Pos LineHist-based position tracking with
the syntax.Pos implementation and updates all uses.
The LineHist table is not used anymore - the respective code is still
there but should be removed eventually. CL forthcoming.
Passes toolstash -cmp when comparing to the master repo (with the
exception of a couple of swapped assembly instructions, likely due
to different instruction scheduling because the line-based sorting
has changed; though this is won't affect correctness).
The sizes of various important compiler data structures have increased
significantly (see the various sizes_test.go files); this is probably
the reason for an increase of compilation times (to be addressed). Here
are the results of compilebench -count 5, run on a "quiet" machine (no
apps running besides a terminal):
name old time/op new time/op delta
Template 256ms ± 1% 280ms ±15% +9.54% (p=0.008 n=5+5)
Unicode 132ms ± 1% 132ms ± 1% ~ (p=0.690 n=5+5)
GoTypes 891ms ± 1% 917ms ± 2% +2.88% (p=0.008 n=5+5)
Compiler 3.84s ± 2% 3.99s ± 2% +3.95% (p=0.016 n=5+5)
MakeBash 47.1s ± 1% 47.2s ± 2% ~ (p=0.841 n=5+5)
name old user-ns/op new user-ns/op delta
Template 309M ± 1% 326M ± 2% +5.18% (p=0.008 n=5+5)
Unicode 165M ± 1% 168M ± 4% ~ (p=0.421 n=5+5)
GoTypes 1.14G ± 2% 1.18G ± 1% +3.47% (p=0.008 n=5+5)
Compiler 5.00G ± 1% 5.16G ± 1% +3.12% (p=0.008 n=5+5)
Change-Id: I241c4246cdff627d7ecb95cac23060b38f9775ec
Reviewed-on: https://go-review.googlesource.com/34273
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Loop breaking with a counter. Benchmarked (see comments),
eyeball checked for sanity on popular loops. This code
ought to handle loops in general, and properly inserts phi
functions in cases where the earlier version might not have.
Includes test, plus modifications to test/run.go to deal with
timeout and killing looping test. Tests broken by the addition
of extra code (branch frequency and live vars) for added
checks turn the check insertion off.
If GOEXPERIMENT=preemptibleloops, the compiler inserts reschedule
checks on every backedge of every reducible loop. Alternately,
specifying GO_GCFLAGS=-d=ssa/insert_resched_checks/on will
enable it for a single compilation, but because the core Go
libraries contain some loops that may run long, this is less
likely to have the desired effect.
This is intended as a tool to help in the study and diagnosis
of GC and other latency problems, now that goal STW GC latency
is on the order of 100 microseconds or less.
Updates #17831.
Updates #10958.
Change-Id: I6206c163a5b0248e3f21eb4fc65f73a179e1f639
Reviewed-on: https://go-review.googlesource.com/33910
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Change-Id: I429637ca91f7db4144f17621de851a548dc1ce76
Reviewed-on: https://go-review.googlesource.com/34923
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
CALLPART of STRUCTLIT did not check for incomplete initialization
of struct; modify PTRLIT treatment to force zeroing.
Test for structlit, believe this might have also failed for
arraylit.
Fixes#18410.
Change-Id: I511abf8ef850e300996d40568944665714efe1fc
Reviewed-on: https://go-review.googlesource.com/34622
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Currently, the check for legal pointers in stack copying uses
_PageSize (8K) as the minimum legal pointer. By default, Linux won't
let you map under 64K, but
1) it's less clear what other OSes allow or will allow in the future;
2) while mapping the first page is a terrible idea, mapping anywhere
above that is arguably more justifiable;
3) the compiler only assumes the first physical page (4K) is never
mapped.
Make the runtime consistent with the compiler and more robust by
changing the bad pointer check to use 4K as the minimum legal pointer.
This came out of discussions on CLs 34663 and 34719.
Change-Id: Idf721a788bd9699fb348f47bdd083cf8fa8bd3e5
Reviewed-on: https://go-review.googlesource.com/34890
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Fixes#18392.
Avoid nil dereferencing n.Right when dealing with non-existent
self referenced interface methods e.g.
type A interface{
Fn(A.Fn)
}
Instead, infer the symbol name from n.Sym itself.
Change-Id: I60d5f8988e7318693e5c8da031285d8d7347b771
Reviewed-on: https://go-review.googlesource.com/34817
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Given
var t struct{ lock sync.Mutex }
var fntab []func(t)
f(a(), b(&t), c(), fntab[0](t))
Before:
function call copies lock value: struct{lock sync.Mutex} contains sync.Mutex
After:
call of fntab[0] copies lock value: struct{lock sync.Mutex} contains sync.Mutex
This will make diagnosis easier when there are multiple function calls per line.
Change-Id: I9881713c5671b847b84a0df0115f57e7cba17d72
Reviewed-on: https://go-review.googlesource.com/34730
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Russ Cox
Josh Bleecher Snyder
Keith Randall
Cherry Zhang
Robert Griesemer
Emmanuel Odeke
Hiroshi Ioka
Martin Möhrmann
Matthew Dempsky
Alex Brainman
Ian Lance Taylor
Alberto Donizetti
Ibrahim AshShohail
Michael Munday
Elias Naur
gulyasm
David Crawshaw
David Chase
shawnps
Jaana Burcu Dogan
Austin Clements
Brad Fitzpatrick
Kale Blankenship
Rob Pike