Fixes#16241
I made 64 bits op on 32 bits arches still leak since it was kinda promised.
The promised leaks were wider than this but I don't belive it's effect can
be observed in an breaking maner without using unsafe the way it's currently
setup.
Change-Id: I66d8df47bfe49bce3efa64ac668a2a55f70733a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/462298
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
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Prefix keywords (type, default, case, etc.) with "keyword" in error
messages to make them less ambiguous.
Fixes#68589.
Change-Id: I1eb92d1382f621b934167b3a4c335045da26be9f
Reviewed-on: https://go-review.googlesource.com/c/go/+/623819
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Fold constant int16 addends for usages of math/bits.Add64(x,const,0)
on PPC64. This usage shows up in a few crypto implementations;
notably the go wrapper for CL 626176.
Change-Id: I6963163330487d04e0479b4fdac235f97bb96889
Reviewed-on: https://go-review.googlesource.com/c/go/+/625899
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Reviewed-by: Keith Randall <khr@golang.org>
For the loop body guarded by testing.B.Loop, we disable function inlining and devirtualization inside. The only legal form to be matched is `for b.Loop() {...}`.
For #61515
Change-Id: I2e226f08cb4614667cbded498a7821dffe3f72d8
Reviewed-on: https://go-review.googlesource.com/c/go/+/612043
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As proposed on #66984, this CL allows more types to be used as
wasmimport/wasmexport function parameters and results.
Specifically, bool, string, and uintptr are now allowed, and also
pointer types that point to allowed element types. Allowed element
types includes sized integer and floating point types (including
small integer types like uint8 which are not directly allowed as
a parameter type), bool, array whose element type is allowed, and
struct whose fields are allowed element type and also include a
struct.HostLayout field.
For #66984.
Change-Id: Ie5452a1eda21c089780dfb4d4246de6008655c84
Reviewed-on: https://go-review.googlesource.com/c/go/+/626615
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For the SubFromLen64 codegen test case to work as intended, we need
to fold c-(-(x-d)) into x+(c-d).
Still, some instances of LeadingZeros are not optimized into single
CLZ instructions right now (actually, the LeadingZeros micro-benchmarks
are currently still compiled with redundant adds/subs of 64, due to
interference of loop optimizations before lowering), but perf numbers
indicate it's not that bad after all.
Micro-benchmark results on Loongson 3A5000 and 3A6000:
goos: linux
goarch: loong64
pkg: math/bits
cpu: Loongson-3A5000 @ 2500.00MHz
| bench.old | bench.new |
| sec/op | sec/op vs base |
LeadingZeros 3.660n ± 0% 1.348n ± 0% -63.17% (p=0.000 n=20)
LeadingZeros8 1.777n ± 0% 1.767n ± 0% -0.56% (p=0.000 n=20)
LeadingZeros16 2.816n ± 0% 1.770n ± 0% -37.14% (p=0.000 n=20)
LeadingZeros32 5.293n ± 1% 1.683n ± 0% -68.21% (p=0.000 n=20)
LeadingZeros64 3.622n ± 0% 1.349n ± 0% -62.76% (p=0.000 n=20)
geomean 3.229n 1.571n -51.35%
goos: linux
goarch: loong64
pkg: math/bits
cpu: Loongson-3A6000 @ 2500.00MHz
| bench.old | bench.new |
| sec/op | sec/op vs base |
LeadingZeros 2.410n ± 0% 1.103n ± 1% -54.23% (p=0.000 n=20)
LeadingZeros8 1.236n ± 0% 1.501n ± 0% +21.44% (p=0.000 n=20)
LeadingZeros16 2.106n ± 0% 1.501n ± 0% -28.73% (p=0.000 n=20)
LeadingZeros32 2.860n ± 0% 1.324n ± 0% -53.72% (p=0.000 n=20)
LeadingZeros64 2.6135n ± 0% 0.9509n ± 0% -63.62% (p=0.000 n=20)
geomean 2.159n 1.256n -41.81%
Updates #59120
This patch is a copy of CL 483356.
Co-authored-by: WANG Xuerui <git@xen0n.name>
Change-Id: Iee81a17f7da06d77a427e73dfcc016f2b15ae556
Reviewed-on: https://go-review.googlesource.com/c/go/+/624575
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Reviewed-by: abner chenc <chenguoqi@loongson.cn>
Fixes: #70156
Change-Id: I2e5dc2a39a8e54ec5f18c5f9d1644208cffb2e9a
Reviewed-on: https://go-review.googlesource.com/c/go/+/624695
Auto-Submit: Keith Randall <khr@golang.org>
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Fixes#70175
Change-Id: I13767d951455854b03ad6707ff9292cfe9097ee9
Reviewed-on: https://go-review.googlesource.com/c/go/+/624377
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The compiler will stack allocate the Map struct and initial group if
possible.
Stack maps are initialized inline without calling into the runtime.
Small heap allocated maps use makemap_small.
These are the same heuristics as existing maps.
For #54766.
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Change-Id: I6c371d1309716fd1c38a3212d417b3c76db5c9b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/622042
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Add all the specialized variants that exist for the existing maps.
Like the existing maps, the fast variants do not support indirect
key/elem.
Note that as of this CL, the Get and Put methods on Map/table are
effectively dead. They are only reachable from the internal/runtime/maps
unit tests.
For #54766.
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Change-Id: I95297750be6200f34ec483e4cfc897f048c26db7
Reviewed-on: https://go-review.googlesource.com/c/go/+/616463
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If there is a phi that is computing the minimum of its two inputs,
then we know the result of the phi is smaller than or equal to both
of its inputs. Similarly for maxiumum (although max seems less useful).
This pattern happens for the case
n := copy(a, b)
n is the minimum of len(a) and len(b), so with this optimization we
know both n <= len(a) and n <= len(b). That extra information is
helpful for subsequent slicing of a or b.
Fixes#16833
Change-Id: Ib4238fd1edae0f2940f62a5516a6b363bbe7928c
Reviewed-on: https://go-review.googlesource.com/c/go/+/622240
Reviewed-by: Carlos Amedee <carlos@golang.org>
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Test that a small Wasm program uses 8 MB of linear memory. This
reflects the current allocator. We test an exact value, but if the
allocator changes, we can update or relax this.
Updates #69018.
Change-Id: Ifc0bb420af008bd30cde4745b3efde3ce091b683
Reviewed-on: https://go-review.googlesource.com/c/go/+/622378
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For #69635
Change-Id: Id5696dc9724c3b3afcd7b60a6994f98c5309eb0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/621755
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Reviewed-by: Keith Randall <khr@google.com>
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Change-Id: I03ba70076d6dd3c0b9624d14699b7dd91a3c0e9b
Reviewed-on: https://go-review.googlesource.com/c/go/+/618476
Reviewed-by: Keith Randall <khr@golang.org>
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Reviewed-by: Keith Randall <khr@google.com>
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CL 621357 introduced new generic lowering rules which caused
several shift related codegen test failures.
Add new rules to fix the test regressions, and cleanup tests
which are changed but not regressed. Some CLRLSLDI tests are
removed as they are no test CLRLSLDI rules.
Fixes#70003
Change-Id: I1ecc5a7e63ab709a4a0cebf11fa078d5cf164034
Reviewed-on: https://go-review.googlesource.com/c/go/+/622236
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Change the description of an operand x that has a named type of sorts
by providing a description of the type structure (array, struct, slice,
pointer, etc).
For instance, given a (variable) operand x of a struct type T, the
operand is mentioned as (new):
x (variable of struct type T)
instead of (old):
x (variable of type T)
This approach is also used when a basic type is renamed, for instance
as in:
x (value of uint type big.Word)
which makes it clear that big.Word is a uint.
This change is expected to produce more informative error messages.
Fixes#69955.
Change-Id: I544b0698f753a522c3b6e1800a492a94974fbab7
Reviewed-on: https://go-review.googlesource.com/c/go/+/621458
Reviewed-by: Alan Donovan <adonovan@google.com>
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This change improves error message for recursive types.
Currently, compilation of the [following program](https://go.dev/play/p/3ef84ObpzfG):
package main
type T1[T T2] struct{}
type T2[T T1] struct{}
returns an error:
./prog.go:3:6: invalid recursive type T1
./prog.go:3:6: T1 refers to
./prog.go:4:6: T2 refers to
./prog.go:3:6: T1
With the patch applied the error message looks like:
./prog.go:3:6: invalid recursive type T1
./prog.go:3:6: T1 refers to T2
./prog.go:4:6: T2 refers to T1
Change-Id: Ic07cdffcffb1483c672b241fede4e694269b5b79
GitHub-Last-Rev: cd042fdc38
GitHub-Pull-Request: golang/go#69574
Reviewed-on: https://go-review.googlesource.com/c/go/+/614084
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The spill/restore code around morestack is almost never exectued, so
we should make it as small as possible. Using 2-register loads/stores
makes sense here. Also, the offsets from SP are pretty small so the
offset almost always fits in the (smaller than a normal load/store)
offset field of the instruction.
Makes cmd/go 0.6% smaller.
Change-Id: I8845283c1b269a259498153924428f6173bda293
Reviewed-on: https://go-review.googlesource.com/c/go/+/621556
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CL 594596 already did this for regabi, but missed non-regabi.
Stack allocated swiss maps don't call rand32.
For #54766.
Change-Id: I312ea77532ecc6fa860adfea58ea00b01683ca69
Reviewed-on: https://go-review.googlesource.com/c/go/+/621615
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Currently, on Mach-O, the Go linker doesn't generate LC_UUID in
internal linking mode. This causes some macOS system tools unable
to track the binary, as well as in some cases the binary unable
to access local network on macOS 15.
This CL makes the linker start generate LC_UUID. Currently, the
UUID is generated if the -B flag is specified. And we'll make it
generate UUID by default in a later CL. The -B flag is currently
for generating GNU build ID on ELF, which is a similar concept to
Mach-O's UUID. Instead of introducing another flag, we just use
the same flag and the same setting. Specifically, "-B gobuildid"
will generate a UUID based on the Go build ID.
For #68678.
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Reviewed-on: https://go-review.googlesource.com/c/go/+/618595
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Extendible hashing splits a swisstable map into many swisstables. This
keeps grow operations small.
For #54766.
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Change-Id: Id91f34af9e686bf35eb8882ee479956ece89e821
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Use the new SwissTable-based map in internal/runtime/maps as the basis
for the runtime map when GOEXPERIMENT=swissmap.
Integration is complete enough to pass all.bash. Notable missing
features:
* Race integration / concurrent write detection
* Stack-allocated maps
* Specialized "fast" map variants
* Indirect key / elem
For #54766.
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Change-Id: Ie97b656b6d8e05c0403311ae08fef9f51756a639
Reviewed-on: https://go-review.googlesource.com/c/go/+/594596
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The expand-calls pass assumed that tail calls were always done in the
entry block. That used to be true, but with tail calls in wrappers
(enabled by CL 578235) and libfuzzer instrumentation, that is no
longer the case. Libfuzzer instrumentation adds an IF statement to the
start of the wrapper function.
Fixes#69825
Change-Id: I9ab7133691d8235f9df128be39bff154b0b8853b
Reviewed-on: https://go-review.googlesource.com/c/go/+/619075
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If the expression type is a single compile-time known type, use that
type instead of the dynamic one, so the later passes of the compiler
could skip un-necessary runtime calls.
Thanks Youlin Feng for writing the original test case.
Change-Id: I3f65ab90f041474a9731338a82136c1d394c1773
Reviewed-on: https://go-review.googlesource.com/c/go/+/616975
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CL 615915 simplified test for issue 69434, using gcflags maymorestack to
force stack moving, making program failed with invalid stack pointer.
However, it seems that this maymorestack is broken on riscv64. At least
gotip-linux-riscv64 is currently broken.
This CL fixes this problem by using the initial approach, growing stack
size big enough to force stack moving.
Updates #69434Fixes#69714
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Change-Id: I95255fba884a200f75bcda34d58e9717e4a952ad
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It makes use of the hiter structure which matches runtime.hiter's.
This change mainly improves the performance of Next method of MapIter.
goos: darwin
goarch: arm64
pkg: reflect
cpu: Apple M2
│ ./old.txt │ ./new.txt │
│ sec/op │ sec/op vs base │
MapIterNext-8 61.95n ± 0% 54.95n ± 0% -11.28% (p=0.000 n=10)
for the change of `test/escape_reflect.go`:
removing mapiterkey, mapiterelem would cause leaking MapIter content
when calling SetIterKey and SetIterValue,
and this may cause map bucket to be allocated on heap instead of stack.
Reproduce:
```
{
m := map[int]int{1: 2} // escapes to heap after this change
it := reflect.ValueOf(m).MapRange()
it.Next()
var k, v int
reflect.ValueOf(&k).Elem().SetIterKey(it)
reflect.ValueOf(&v).Elem().SetIterValue(it)
println(k, v)
}
```
This CL would not introduce abi.NoEscape to fix this. It may need futher
optimization and tests on hiter field usage and its escape analysis.
Fixes#69416
Change-Id: Ibaa33bcf86228070b4a505b9512680791aa59f04
Reviewed-on: https://go-review.googlesource.com/c/go/+/612616
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CL 584596 "-range<N>" suffix to the name of closure generated for a
rangefunc loop body. However, this breaks the condition that escape
analysis uses for checking whether a closure contains within function,
which is "F.funcN" for outer function "F" and closure "funcN".
Fixing this by adding new "-rangeN" to the condition.
Fixes#69434Fixes#69507
Change-Id: I411de8f63b69a6514a9e9504d49d62e00ce4115d
Reviewed-on: https://go-review.googlesource.com/c/go/+/614096
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Moving these intrinsics to a base package enables other internal/runtime
packages to use them.
For #54766.
Change-Id: I45a530422207dd94b5ad4eee51216c9410a84040
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Moving these intrinsics to a base package enables other internal/runtime
packages to use them.
For #54766.
Change-Id: I0b3eded3bb45af53e3eb5bab93e3792e6a8beb46
Reviewed-on: https://go-review.googlesource.com/c/go/+/613260
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Fixes#24755
Change-Id: I00b276c5c2acb227d42a069d1af6027e4b499d31
Reviewed-on: https://go-review.googlesource.com/c/go/+/613115
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Fixes#20027
Change-Id: Ia616d43c0affa7b927ddfb53755072c94ba27917
Reviewed-on: https://go-review.googlesource.com/c/go/+/612618
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The function resultsToWasmFields was originally for only
wasmimport. I adopted it for wasmexport as well, but forgot to
update a few places that were wasmimport-specific. This leads to
compiler panic if an invalid result type is passed, and also
unsafe.Pointer not actually supported. This CL fixes it.
Updates #65199.
Change-Id: I9bbd7154b70422504994840ff541c39ee596ee8f
Reviewed-on: https://go-review.googlesource.com/c/go/+/611315
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Reviewed-by: Achille Roussel <achille.roussel@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Change-Id: I7d996b8d46fbeef933943f806052a30f1f8d50c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/588836
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Joel Sing <joel@sing.id.au>
Reviewed-by: Tim King <taking@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
This CL optimizes the compilation of string-to-bytes conversion in the
case of string additions.
Fixes#62407
Change-Id: Ic47df758478e5d061880620025c4ec7dbbff8a64
Reviewed-on: https://go-review.googlesource.com/c/go/+/527935
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Tim King <taking@google.com>
Use OTAILCALL in wrapper if the receiver and method are both pointers and it is
not going to be inlined, similar to how it is done in reflectdata.methodWrapper.
Currently tail call may be used for functions with identical argument types.
This change updates wrappers where both wrapper and the wrapped method's
receiver are pointers. In this case, we have the same signature for the
wrapper and the wrapped method (modulo the receiver's pointed-to types),
and do not need any local variables in the generated wrapper (on stack)
because the arguments are immediately passed to the wrapped method in place
(without need to move some value passed to other register or to change any
argument/return passed through stack). Thus, the wrapper does not need its
own stack frame.
This applies to promoted methods, e.g. when we have some struct type U with
an embedded type *T and construct a wrapper like
func (recv *U) M(arg int) bool { return recv.T.M(i) }
See also test/abi/method_wrapper.go for a running example.
Code size difference measured with this change (tried for x86_64):
etcd binary:
.text section size: 21472251 -> 21432350 (0.2%)
total binary size: 32226640 -> 32191136 (0.1%)
compile binary:
.text section size: 17419073 -> 17413929 (0.03%)
total binary size: 26744743 -> 26737567 (0.03%)
Change-Id: I9bbe730568f6def21a8e61118a6b6f503d98049c
Reviewed-on: https://go-review.googlesource.com/c/go/+/578235
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
In rare situations, like during same-sized grows, the source map for
maps.Clone may be overloaded (has more than 6.5 entries per
bucket). This causes the runtime to allocate a larger bucket array for
the destination map than for the source map. The maps.Clone code
walks off the end of the source array if it is smaller than the
destination array.
This is a pretty simple fix, ensuring that the destination bucket
array is never longer than the source bucket array. Maybe a better fix
is to make the Clone code handle shorter source arrays correctly, but
this fix is deliberately simple to reduce the risk of backporting this
fix.
Fixes#69110
Change-Id: I824c93d1db690999f25a3c43b2816fc28ace7509
Reviewed-on: https://go-review.googlesource.com/c/go/+/609757
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
