Commit Graph

5804 Commits

Author SHA1 Message Date
Dan Scales 281d168e2d cmd/compile: don't set Ntype in noder2 anymore
Now that we are no longer calling the old typechecker at all during the
noder2 pass, we don't need to create and set an Ntype node ((which is
just a node representation of the type which we already know) for the
Name and Closure nodes. This should reduce memory usage a bit for -G=3.

Change-Id: I6b1345007ce067a89ee64955a53f25645c303f4d
Reviewed-on: https://go-review.googlesource.com/c/go/+/308909
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-04-09 22:57:48 +00:00
Austin Clements fcf8a6640b cmd/compile/abi-internal: declare R14 completely fixed
Currently, we allow R14, the current goroutine pointer, to be
clobbered in function bodies as long as the function restores it. This
is unnecessary complexity and could lead to confusing inconsistencies
with other architectures that can't simply restore it from TLS.

Updates #40724.

Change-Id: I4c052f0dd0b31d31afeb0c5aff05c314d7a852f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/309009
Trust: Austin Clements <austin@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-04-09 18:11:15 +00:00
Austin Clements 0ad46889a1 cmd/compile/abi-internal: declare X15 scratch in function bodies
X15 must be zero at function calls and returns, but can be used as
scratch in the middle of a function. This allows things like memmove
and the hashing functions to use X15 temporarily, as long as they set
it back to 0 before returning.

This CL also clarifies the distinction between register meanings on
function call versus function return, since some of them have fixed
meanings at both call and return, while others only have a fixed
meaning at calls.

Updates #40724.

Change-Id: I9dad3abde42cd4d2788e8435cde6d55073dd75a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/308929
Trust: Austin Clements <austin@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-04-09 17:56:50 +00:00
David Chase 6951da56b0 Revert "cmd/compile: ensure spills of int/float reg args land in abi slots"
This reverts CL 308510.

Reason for revert: It breaks "GOEXPERIMENT=regabi,regabiargs ./make.bash"

Change-Id: I553654690ec73120f8a6258dd80623853c430df0
Reviewed-on: https://go-review.googlesource.com/c/go/+/308932
Trust: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-04-09 15:01:13 +00:00
David Chase a690a5d75f cmd/compile: ensure spills of int/float reg args land in abi slots
We noticed a while ago that register argument spills were not always
landing where they should.

Updates #40724.

Change-Id: I0b7c3279a2f6270577481c252bae4568cbb6e796
Reviewed-on: https://go-review.googlesource.com/c/go/+/308510
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-04-09 14:33:44 +00:00
Dan Scales 519f223aa2 cmd/compile: reduce overhead of RParams in types.Type
Changed RParams in types.Type to be a pointer to a slice, rather than a
slice itself, in order to reduce it from three words to one words, since
the large majority of types will not be generic or instantiated from a
generic type.

Additional cleanup: remove operation OTYPEINST, which we don't have need
of, since all type instantiations are either handled by types2 or happen
automatically during some form of stenciling.

Both of these are useful cleanups before the Go 1.17 freeze.

Change-Id: I61ad56b3c698b30d2cb5a2cdd12263202c54f49c
Reviewed-on: https://go-review.googlesource.com/c/go/+/308770
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
2021-04-09 12:56:04 +00:00
Cherry Zhang d25c4fbe05 test: do not run softfloat test with regabiargs
Softfloat mode with register ABI is not implemented yet. In
particular, we did not rewrite the float types in AuxCalls to
integer types, so arguments are still passed in floating point
registers, which do not exist in softfloat mode. To make it work
I think we may want to reorder softfloat pass with expand_calls
pass. We also need to rewrite the OpArgFloatRegs for the spilling
of non-SSA-able arguments, which may involve renumbering interger
arguments. Maybe in softfloat mode we want to just define the
ABI with 0 float registers. They are not fundamentally hard, but
may be not worth doing for the moment, as we don't use softfloat
mode on AMD64 anyway.

Run the test with noregabiargs. Also in the compiler reject
-d=softfloat if regabiargs is enabled.

Change-Id: I8cc0c2cfa88a138bc1338ed8710670245f1bd2cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/308710
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-04-09 00:11:25 +00:00
Cherry Zhang ec367e5b05 cmd/compile: adjust interface conversion function selection with 0-sized fields
0-sized fields do not affect how arguments are passed under the
register ABI. But it does affect the size and alignment of the
type, and may affect the choice of interface conversion function.
Specifically, struct { a [0]int32; b [4]byte } should be passed in
memory, therefore should not use convT32.

Change-Id: Idfa21af79b81c196b50253b0be1fa4edecd12b45
Reviewed-on: https://go-review.googlesource.com/c/go/+/308651
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-04-08 21:26:36 +00:00
Cherry Zhang 6c98ecda10 cmd/compile: don't use fast32/64 map functions for aggregates
Under register ABI, aggregates like [2]uint32 is passed
differently than a uint64. For now, don't use the fast version
of the map functions for non-trivial aggregates.

GOEXPERIMENT=regabi,regabiargs can now pass make.bash, modulo
staleness checks.

TODO: maybe find some way to use the fast functions. Maybe
unsafe-cast to uint32/64 then call the map function. But need to
make the type checker happy.

Change-Id: If42717280dde12636fb970798cf1ca8fb29a3d06
Reviewed-on: https://go-review.googlesource.com/c/go/+/308650
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
2021-04-08 21:02:58 +00:00
David Chase a9e475a15a cmd/compile: add recursive-invalidate Value method, use in expand_calls
This removes more unused values during transformation.
Leaving them in the tree can create type conflicts in OpArg* references.

Updates #40724.
Updates #44816.
Fixes #45417.

Change-Id: I07dcb7b4b2bf8d79e22e0543cb2fb52c2ececb96
Reviewed-on: https://go-review.googlesource.com/c/go/+/308589
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-04-08 20:26:47 +00:00
Than McIntosh bb76193a7f cmd/compile: fix buglet in walk convert phase relating to convF32/64
The helper function used by the compiler's walk phase to determine
whether a param can be passed in a single float register wasn't quite
correct (didn't allow for the possibility of struct with two fields,
first zero size and second float). Fix up the helper to take this
case into account.

Updates #40724.

Change-Id: I55b42a1b17ea86de1d696788f029ad3aae4a179c
Reviewed-on: https://go-review.googlesource.com/c/go/+/308689
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-04-08 19:58:50 +00:00
Dan Scales 46ffbec1d6 cmd/compile: break out transformations of tcCompLit into transformCompLit
Create transformCompLit, which does the transformations done by
tcCompLit without the typechecking. This removes the final use of the
old typechecker in the noder2 pass.

Other changes:

 - Used the transformCompLit in stringstorunelit(), which creates an
   OCOMPLIT that needs transformation as well.

 - Fixed one place in transformIndex where we were still using
   typecheck.AssignConv, when we should be using its equivalent
   noder.assignconvfn.

The go/test tests always run with -G=3, and I also tested that the "go
test" tests continue to run correctly with -G=3.

Change-Id: I4a976534ab7311cf2a5f43841026dbf7401e62b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/308529
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Dan Scales <danscales@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-04-08 19:32:37 +00:00
Than McIntosh ca8540affd cmd/compile: fix buglet in walk convert phase relating to convT64
The function runtime.convT64 accepts a single uint64 argument, but the
compiler's rules in the walk phase for determining whether is it ok to
pass a value of type T to a call to runtime.convT64 were slightly off.
In particular the test was allowing a type T with size less than eight
bytes but with more than one internal element (e.g. a struct). This
patch tightens up the rules somewhat to prevent this from happening.

Updates #40724.

Change-Id: I3b909267534db59429b0aa73a3d73333e1bd6432
Reviewed-on: https://go-review.googlesource.com/c/go/+/308069
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-04-08 17:44:21 +00:00
David Chase 283b02063b cmd/compile: sanitize before/after expansion OpSelectN references
In expand_calls, OpSelectN occurs both before and after the rewriting.
Attempting to rewrite a post-expansion OpSelectN is bad.
(The only ones rewritten in place are the ones returning mem;
others are synthesized to replace other selection chains with
register references.)

Updates #40724.
Updates #44816#issuecomment-815258897.

Change-Id: I7b6022cfb47f808d3ce6cc796c067245f36047f3
Reviewed-on: https://go-review.googlesource.com/c/go/+/308309
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-04-08 15:03:31 +00:00
Matthew Dempsky 2123dfba65 Revert "cmd/compile/internal/noder: limit the number of goroutine"
This reverts commit c274a7c03b.

Reason for revert: this can cause a compiler deadlock, and there's
no demonstrable benefit to making the change.

Change-Id: I42325ddea68d37db16fd0061c5baaee112b755b7
Reviewed-on: https://go-review.googlesource.com/c/go/+/308369
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2021-04-08 06:08:49 +00:00
Austin Clements 89ca1ce9a8 cmd/compile,cmd/internal/objabi: abstract out object header string
Change-Id: Idbbb4cb7127b93afa34a8aa18bbdaad1f206ab6a
Reviewed-on: https://go-review.googlesource.com/c/go/+/308090
Trust: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-04-08 02:17:19 +00:00
Makdon e306d06063 runtime/map: update comment for gc/reflect
update comment cause gc/reflect.go has been moved to reflectdata/reflect.go

In the commit (attach below), gc/reflect.go is moved to reflectdata/reflect.go
So the  comment referring gc/reflect.go should be updated to reflectdata/reflect.go

There maybe other places that refers gc/reflect.go that should be updated.
I would work around it soon.

commit:
de65151e50
e4895ab4c0

Change-Id: Ieed5c48049ffe6889c08e164972fc7825653ac05
GitHub-Last-Rev: eec9c2328d
GitHub-Pull-Request: golang/go#45421
Reviewed-on: https://go-review.googlesource.com/c/go/+/307930
Reviewed-by: Keith Randall <khr@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
2021-04-07 18:44:30 +00:00
Robert Griesemer b3064b66d0 cmd/compile/internal/types2: combine two loops (cleanup of TODO)
Follow-up on https://golang.org/cl/306170.

Change-Id: I71b451382b6780101a0c94174ebe579e8a0684c2
Reviewed-on: https://go-review.googlesource.com/c/go/+/307949
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-07 16:57:40 +00:00
Cherry Zhang b55d900529 cmd/compile: correct argument area size for typedmemmove/typedmemclr
When the write barrier pass emits typedmemmove/typedmemclr calls,
even the arguments are in registers, we still need to leave space
for the spill slots. Count that space. Otherwise when the callee
spills arguments it may clobber locals on the caller's frame.

Change-Id: I5326943427feaf66cab7658a5bef55b3baf5d345
Reviewed-on: https://go-review.googlesource.com/c/go/+/307824
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
2021-04-07 13:14:57 +00:00
Robert Griesemer 4bbe046aad cmd/compile/internal/syntax: add "~" operator
Change-Id: I7991103d97b97260d9615b7f5baf7ec75ad87d1f
Reviewed-on: https://go-review.googlesource.com/c/go/+/307370
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-07 05:19:41 +00:00
Robert Griesemer 836356bdaa cmd/compile/internal/types2: process errors in src order during testing
Follow-up on https://golang.org/cl/305573.
As a consequence, re-enable test case that caused problems with that CL.

Change-Id: Ibffee3f016f4885a55b8e527a5680dd437322209
Reviewed-on: https://go-review.googlesource.com/c/go/+/307216
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-07 05:19:36 +00:00
Robert Griesemer 8f1099b585 cmd/compile/internal/syntax, types2: move cmpPos to pos.Cmp
Make position comparison generally available.

Change-Id: I94b6f658fa19a15b30574dbb2181879115c131a8
Reviewed-on: https://go-review.googlesource.com/c/go/+/307215
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-07 05:19:29 +00:00
Robert Griesemer 1395432f23 cmd/compile/internal/types2: remove Config.AcceptMethodTypeParams flag
Type parameters for methods are not part of the accepted language,
but maintaining the code for type-checking them ensures regularity
of the type checker implementation. For now, keep the flag internally,
disabled by default. The flag is set when running tests.

Change-Id: Ic99934bd00bd2608dc1178e4131f46dd1507f0f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/307214
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-07 05:19:22 +00:00
Robert Griesemer 7d5c54eee4 cmd/compile/internal/types2: remove Config.InferFromConstraints flag
Constraint type inference is part of the proposed language.
Use an internal flag to control the feayure for debugging.

Change-Id: I7a9eaee92b5ffc23c25d9e68a729acc0d705e879
Reviewed-on: https://go-review.googlesource.com/c/go/+/306770
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-07 05:19:15 +00:00
Robert Griesemer bce85b7011 cmd/compile/internal/types2: combine all type inference in a single function
Rather than splitting up type inference into function argument
and constraint type inference, provide a single Checker.infer
that accepts type parameters, type arguments, value parameters,
and value arguments, if any. Checker.infer returns the completed
list of type arguments, or nil.

Updated (and simplified) call sites.

Change-Id: I9200a44b9c4ab7f2d21eed824abfffaab68ff766
Reviewed-on: https://go-review.googlesource.com/c/go/+/306170
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-07 05:19:08 +00:00
David Chase 8462169b5a cmd/compile: pre-spill pointers in aggregate-typed register args
There's a problem in liveness, where liveness of any
part of an aggregate keeps the whole aggregate alive,
but the not-live parts don't get spilled.  The GC
can observe those live-but-not-spilled slots, which
can contain junk.

A better fix is to change liveness to work
pointer-by-pointer, but that is also a riskier,
trickier fix.

To avoid this, in the case of

(1) an aggregate input parameter
(2) containing pointers
(3) passed in registers

pre-spill the pointers.

Updates #40724.

Change-Id: I6beb8e0a353b1ae3c68c16072f56698061922c04
Reviewed-on: https://go-review.googlesource.com/c/go/+/307909
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-04-07 03:42:11 +00:00
eric fang 8d77e45064 cmd/compile: fix bug of conditional instructions on arm64
CL 302231 added some optimization rules with instructions CSETM, CSINC,
CSINV, and CSNEG, but did not deal with the situation where flag is
constant, resulting in some cases that could be more optimized cannot
be optimized, and the FlagConstant value is passed to codegen pass. This
CL adds these missing rules.

Fixes #45359

Change-Id: I700608cfb9a6a768a18d1fd5d374d7e92aa6f838
Reviewed-on: https://go-review.googlesource.com/c/go/+/307650
Reviewed-by: eric fang <eric.fang@arm.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>
Run-TryBot: eric fang <eric.fang@arm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: eric fang <eric.fang@arm.com>
Trust: Alberto Donizetti <alb.donizetti@gmail.com>
2021-04-07 02:05:55 +00:00
David Chase b56177a303 cmd/compile: check for unused OpArg* and mark invalid (again)
This caused a problem with

GOEXPERIMENT=regabi,regabiargs go test -c  crypto/x509

Updates #40724.

Change-Id: Ia3cdbe9968816c77836cb3e3ba89642aafd1b18d
Reviewed-on: https://go-review.googlesource.com/c/go/+/307529
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-04-06 20:28:21 +00:00
Cherry Zhang f5efa5a313 cmd/compile: load results into registers on open defer return path
When a function panics then recovers, it needs to return to the
caller with named results having the correct values. For
in-register results, we need to load them into registers at the
defer return path.

For non-open-coded defers, we already generate correct code, as
the defer return path is part of the SSA CFG and contains the
instructions that are the same as an ordinary return statement,
including putting the results to the right places.

For open-coded defers, we have a special code generation that
emits a disconnected block that currently contains only the
deferreturn call and a RET instruction. It leaves the result
registers unset. This CL adds instructions that load the result
registers on that path.

Updates #40724.

Change-Id: I1f60514da644fd5fb4b4871a1153c62f42927282
Reviewed-on: https://go-review.googlesource.com/c/go/+/307231
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2021-04-06 20:22:15 +00:00
Robert Griesemer d6a90d06d2 cmd/compile/internal/types2: simplify Checker.Call
Now that we use square brackets for instantiations, we
can tell type arguments from ordinary arguments without
"guessing" which permits a simpler implementation.

Specifically, replace use of Checker.exprOrTypeList with
Checker.exprList, and delete Checker.exprOrTypeList and
Checker.multiExprOrType.

Disable a test for an (esoteric) failure due to an
unrelated problem with error matching when running
the test.

Change-Id: I17f18fffc32f03fa90d93a68ebf56e5f2fcc9dab
Reviewed-on: https://go-review.googlesource.com/c/go/+/306171
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-06 19:00:26 +00:00
Robert Griesemer 3a30381b21 cmd/compile/internal/types2: simplify Checker.funcInst
Now that we use square brackets for instantiations, we
can tell type arguments from ordinary arguments without
"guessing" which permits a simpler implementation.

While at it, also fix a minor position error for type
instantiations (now matching the code for function
instantiations).

Change-Id: I20eca51c5b06259703767b5906e89197d6cd595a
Reviewed-on: https://go-review.googlesource.com/c/go/+/306169
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-06 18:59:08 +00:00
Robert Griesemer 93466cc1b6 cmd/compile/internal/types2: review of pos.go and move into syntax package
This moves the two helper functions startPos and endPos into
the syntax package where they belong. Export the functions and
adjust dependent code.

Change-Id: I8170faeadd7cfa8f53009f81fcffd50ec0fc6a98
Reviewed-on: https://go-review.googlesource.com/c/go/+/305578
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-06 18:57:04 +00:00
Cherry Zhang b345a306a0 cmd/compile: when GOSSAFUNC is set, dump the current pass on crash
When an SSA pass ICEs, it calls f.Fatalf, which terminates the
compiler. When GOSSAFUNC is set, the current pass is not written
to ssa.html. This CL makes it write ssa.html when it calls Fatalf,
for the ease of debugging.

Change-Id: I5d55e4258f0693d89c48c0a84984f2f893b0811d
Reviewed-on: https://go-review.googlesource.com/c/go/+/307509
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
2021-04-06 14:15:29 +00:00
Dan Scales 5cd8a34495 cmd/compile: fix gcSizes.Sizeof for a zero-sized struct
(*gcSizes).Sizeof was requiring the last field of a zero-sized struct to
be at least one byte. But that rule (fix for #9401, see logic in
calcStructOffset) only applies to a struct that has some non-zero sized
fields. Fix (*gcSizes).Sizeof to have the logic like calcStructOffset.

Fixes running the gotests with -G=3 enabled.

Fixes #45390

Change-Id: I011f40e3de3a327392bbbb791b9422be75336313
Reviewed-on: https://go-review.googlesource.com/c/go/+/307549
Reviewed-by: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
2021-04-06 13:01:37 +00:00
cui 84162b8832 cmd/compile/internal/typecheck: call tcConv directly
Change-Id: I9f71acfa93c47cff620b006918872ecd90bbebe9
GitHub-Last-Rev: 2fed2e2305
GitHub-Pull-Request: golang/go#45366
Reviewed-on: https://go-review.googlesource.com/c/go/+/307109
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
2021-04-06 09:22:20 +00:00
Than McIntosh b2389ad3ce cmd/compile: fix for zerorange on plan9-amd64
In CL 305829 a problematic change was made to the compiler's
amd64-specific "zerorange" function. In zerorange the compiler uses
different sets of strategies depending on the size of the stack frame
it needs to zero; turns out that only on plan9-amd64 was it hitting
the final fallback strategy, which is a REPSTOSQ instruction. REPSTOSQ
takes RAX as an input, hence the changes made in CL 305829 (switching
to R13) were incorrect.

This patch restores the zerorange REPSTOSQ sequence (back to use RAX).
This is going to be an interim solution, since long term we need to
avoid touching RAX in the function prolog (since if the new register
ABI is in effect, it will hold a live value).

Fixes #45372.

Change-Id: Ic89a6a2a76d6e03b9fbda99275101e96b70fdf5d
Reviewed-on: https://go-review.googlesource.com/c/go/+/307469
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David du Colombier <0intro@gmail.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-04-05 23:21:16 +00:00
Cherry Zhang 0723f062ff cmd/compile: enable panic+recover adjustment for some ABI wrappers
For most ABI wrappers we don't need it because we're never going
to defer an ABI wrapper for a function that then recovers, so
that's would just be unnecessary code in the ABI wrapper.

However, for functions that could be on the path of invoking a
deferred function that can recover (runtime.reflectcall,
reflect.callReflect, and reflect.callMethod), we do want the
panic+recover adjustment. Set the Wrapper flag for them.

Currently, those functions are defined as ABIInternal to avoid
the ABI wrappers. But the assembly code still follows ABI0
calling convention, which would not work with the register-based
calling convention. In particlar, it is not possible to make
runtime.reflectcall ABIInternal, because it tail calls
runtime.callNN functions, which are splittable. Later CLs will
make them ABI0 and use the wrappers.

Updates #40724.

Change-Id: Ic7a45bbc6f726d29b5cb4932951a9d71578dcaf6
Reviewed-on: https://go-review.googlesource.com/c/go/+/307236
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2021-04-05 22:38:48 +00:00
David Chase ee40bb666b cmd/compile: add "surprised by IData of Arg" case for register args
This fixes a compile crash for
GOEXPERIMENT=regabi,regabiargs go test -c  go/constant

Updates #40724.

Change-Id: I238cef436e045647815326fc8fdb025c30ba1f5c
Reviewed-on: https://go-review.googlesource.com/c/go/+/307309
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
2021-04-05 20:11:08 +00:00
Cherry Zhang cf148f3d46 cmd/compile, runtime: use ABI-aware function converting float to interface
Currently, when converting a float (say float64), we use convT64
function. In the runtime convT64 expects a uint64 argument. In
the compiler, convT64 is defined as taking an "any" argument (so
it works with also uint64-like types such as [1]uint64). The "any"
type is instantiated with the concrete type in walk. So the
backend will see instances such as convT64([1]uint64).

Currently, float64 is treated as uint64-like. So the backend will
see convT64(float64). With a memory-based calling convention this
is fine. With a register-based calling convention, however, it
will pass the argument in a floating point register, whereas the
runtime expects the argument in an integer register (as it is
declared as uint64).

To fix this, this CL introduces runtime functions convT32F and
convT64F. They behave the same as convT32/convT64, but with a
float argument. In the compiler, use convT32F/convT64F to convert
float-like type to interface.

With this, "GOEXPERIMENT=regabi,regabiargs go test math fmt"
works.

Updates #40724.

Change-Id: I8b2e232096a95e4a7c4ab81795d77ef224ffaab3
Reviewed-on: https://go-review.googlesource.com/c/go/+/307232
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
2021-04-05 18:22:47 +00:00
cui 9abedf4827 cmd/compile/internal/ssagen: conditon not need
n.Op() == ir.OFOR so n.Op() != ir.OFORUNTIL is always true

Change-Id: I97191783c1fb31ef76e0601f626b45af1e8d316e
GitHub-Last-Rev: f68f9fecfb
GitHub-Pull-Request: golang/go#45389
Reviewed-on: https://go-review.googlesource.com/c/go/+/307251
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Josh Bleecher Snyder <josharian@gmail.com>
2021-04-05 17:42:13 +00:00
Cherry Zhang 5cc5576a9c cmd/compile: untangle Wrapper and ABIWrapper flags
Currently, there are Wrapper and ABIWrapper attributes. Wrapper
is set when compiler generates an wrapper function (e.g. method
wrapper). ABIWrapper is set when compiler generates an ABI
wrapper. It also sets Wrapper flag for ABI wrappers.

Currently, they have the following meanings:
- Wrapper flag hides the frame from (normal) traceback.
- Wrapper flag enables special panic+recover adjustment, so it
  can correctly recover when a wrapper function is deferred.
- ABIWrapper flag disables the panic+recover adjustment, because
  we never defer an ABI wrapper that can recover.

This CL changes them to:
- Both Wrapper and ABIWrapper flags hide the frame from (normal)
  traceback. (Setting one is enough.)
- Wrapper flag enables special panic+recover adjustment.
  ABIWrapper flag no longer has effect on this.

This makes it clearer if we do want an ABI wrapper that also does
the panic+recover adjustment. In the old mechanism we'd have to
unset ABIWrapper flag, even if the function is actually an ABI
wrapper. In the new mechanism we just need to set both ABIWrapper
and Wrapper flags.

Updates #40724.

Change-Id: I7fbc83f85d23676dc94db51dfda63dcacdf1fc19
Reviewed-on: https://go-review.googlesource.com/c/go/+/307235
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2021-04-05 17:27:18 +00:00
Cherry Zhang 45e87cd3ec cmd/compile: disable tail call for method wrappers when RegabiArgs is enabled
Currently, the IR of tailcall does not connect the arguments with
the OTAILCALL node, so the arguments are not marshaled correctly.
Disable tail call for now.

Updates #40724.

Change-Id: I39de3ea8e19a23eb63768ab7282d2f870e9c266e
Reviewed-on: https://go-review.googlesource.com/c/go/+/307234
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2021-04-05 17:25:15 +00:00
Cherry Zhang 411860251e cmd/compile: reference ABIInternal memequal_varlen
memequal_varlen is put into a closure and is called in internal
ABI in the runtime. Emit an ABIInternal reference.

Updates #40724.

Change-Id: I914555f8188561882625e008b595389e50a3a167
Reviewed-on: https://go-review.googlesource.com/c/go/+/307233
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2021-04-05 17:22:53 +00:00
Cherry Zhang e617b2b0dd cmd/compile: add a debug flag to enable/disable open-coded defers
For debugging.

Change-Id: I831947376569cd2285b713ad304329951adf60ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/307230
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2021-04-05 17:22:26 +00:00
Ruslan Andreev af1789a61c runtime: extend internal atomics to comply with sync/atomic
The CV add changes according to TODO in Go source-code.
Internal atomic set does not comply with sync/atomic library and has shortage
operations for signed integers.
This patch extend internal atomic set by Int32 and Int64 operations. It's
implemented new aliases and asm versions of operations. As a result Cas64 was
replaced by Casint64 in findRunnableGCWorker without type casting.
Another purpose is unified structure of internal atomics' source code. Before,
assembly impementations for different archs were in different files. For
example, filename for AMD64 was asm_amd64.s, but filename for RISC-V was
atomic_riscv64.s. Some arches have both files without any meaning. So, assembly
files were merged and renamed to atomic_{$ARCH}.s filenames.

Change-Id: I29a05a7cbf5f4a9cc146e8315536c038af545677
Reviewed-on: https://go-review.googlesource.com/c/go/+/289152
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
2021-04-05 15:56:14 +00:00
Dan Scales a4b8241d97 cmd/compile: get rid of Fields in types.Interface, use allMethods in types.Type instead
Confusingly, the set of all methods of an interface is currently set in
Fields field of types.Interface. This is true, even though there is
already an allMethods field (and AllMethods method) of types.Type.
Change so the set of all methods of an interface are stored in
Type.allMethods, and Interface.Fields is removed. Update the comments
for Methods and AllMethods.

Change-Id: Ibc32bafae86831cba62606b079a855690612c759
Reviewed-on: https://go-review.googlesource.com/c/go/+/307209
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2021-04-05 15:30:15 +00:00
Dan Scales 6986c02d72 cmd/compile: rename newNamedTypeWithSym, add some commemnts
Renamed newNamedTypeWithSym to newIncompleteNamedType. Added some extra
comments to types.NewNamed and types.SetUnderlying.

Change-Id: Idc5a6379991c26b429d91bae9fe1adef8457a75c
Reviewed-on: https://go-review.googlesource.com/c/go/+/307029
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Ingo Oeser <nightlyone@googlemail.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2021-04-03 18:16:29 +00:00
Robert Griesemer 01821137c2 cmd/compile/internal/types2: review of errors.go
The changes between (equivalent, and reviewed) go/types/errors.go
and errors.go can be seen by comparing patchset 1 and 2. The actual
changes are removing the "// UNREVIEWED" marker.

The go/types version is significantly different as it handles
error codes but doesn't have some of the types2 changes.

Change-Id: I48f79ce31490db938c830df7d38e247d55d54f2d
Reviewed-on: https://go-review.googlesource.com/c/go/+/305577
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-03 01:45:17 +00:00
Robert Griesemer 93dcaba119 cmd/compile/internal/types2: review of stmt.go
The changes between (equivalent, and reviewed) go/types/stmt.go
and stmt.go can be seen by comparing patchset 1 and 2. The actual
changes are removing the "// UNREVIEWED" marker, and minor adjustments
to get the code slightly closer to go/types/stmt.go.

The primary differences compared to go/types are:
- use of syntax rather than go/ast package, with significant
  differences in the representation of switch and select statements,
  range clauses of for statements, and inc/dec statements.
- no reporting of error codes
- use or error_ for collecting addition error information

Change-Id: I4409f62ecafd0653e4c8ef087c2580d8f0544efc
Reviewed-on: https://go-review.googlesource.com/c/go/+/305576
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-03 01:45:13 +00:00
Robert Griesemer a1e4657d5a cmd/compile/internal/types2: review of check_test.go
The changes between (equivalent, and reviewed) go/types/check_test.go
and check_test.go can be seen by comparing patchset 1 and 2. The actual
changes are removing the "// UNREVIEWED" marker, and minor adjustments
to get the code slightly closer to go/types/check_test.go.

The primary differences compared to go/types are:
- use of syntax rather than go/ast package
- re-implemented mechanism for error matching and elimination
  based on the syntax.ErrorMap mechanism (there's no exported
  access to the syntax scanner)
- error matching permits for column tolerances because types2
  column information doesn't match go/types column information

Change-Id: I8ae6bc93dfa2b517673b642064a1f09166755286
Reviewed-on: https://go-review.googlesource.com/c/go/+/305573
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-04-03 01:45:06 +00:00