These operations (BT{S,R,C}{Q,L}modify) are quite a bit slower than
other ways of doing the same thing.
Without the BTxmodify operations, there are two fallback ways the compiler
performs these operations: AND/OR/XOR operations directly on memory, or
load-BTx-write sequences. The compiler kinda chooses one arbitrarily
depending on rewrite rule application order. Currently, it uses
load-BTx-write for the Const benchmarks and AND/OR/XOR directly to memory
for the non-Const benchmarks. TBD, someone might investigate which of
the two fallback strategies is really better. For now, they are both
better than BTx ops.
name old time/op new time/op delta
BitSet-8 1.09µs ± 2% 0.64µs ± 5% -41.60% (p=0.000 n=9+10)
BitClear-8 1.15µs ± 3% 0.68µs ± 6% -41.00% (p=0.000 n=10+10)
BitToggle-8 1.18µs ± 4% 0.73µs ± 2% -38.36% (p=0.000 n=10+8)
BitSetConst-8 37.0ns ± 7% 25.8ns ± 2% -30.24% (p=0.000 n=10+10)
BitClearConst-8 30.7ns ± 2% 25.0ns ±12% -18.46% (p=0.000 n=10+10)
BitToggleConst-8 36.9ns ± 1% 23.8ns ± 3% -35.46% (p=0.000 n=9+10)
Fixes#45790
Update #45242
Change-Id: Ie33a72dc139f261af82db15d446cd0855afb4e59
Reviewed-on: https://go-review.googlesource.com/c/go/+/318149
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
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Reviewed-by: Ben Shi <powerman1st@163.com>
This disables the "testing names" for method names and
trailing input types passed to closure/interface/other calls.
The logic using the names remains, so that editing the change
to enable local testing is not too hard.
Also fixes broken build tag in reflect/abi_test.go
Updates #44816.
Change-Id: I3d222d2473c98d04ab6f1122ede9fea70c994af1
Reviewed-on: https://go-review.googlesource.com/c/go/+/300150
Trust: David Chase <drchase@google.com>
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Reviewed-by: Cherry Zhang <cherryyz@google.com>
The inlsubst already does the same thing for OLABEL, so we must do the
same thing for OGOTO. Otherwise, new inlined OGOTO node will be
associated with non-existed label.
Fixes#45947
Change-Id: I40eef095f57fd3438c38a0b5d9751d5d7ebf759e
Reviewed-on: https://go-review.googlesource.com/c/go/+/316931
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Dan Scales <danscales@google.com>
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The code that created DWARF debug var locations for input parameters
in the non-optimized case for regabi was not doing the right thing for
degenerate functions with infinite loops. Detect these cases and don't
try to emit the normal location data.
Fixes#45948.
Change-Id: I2717fc4bac2e03d5d850a6ec8a09ed05fed0c896
Reviewed-on: https://go-review.googlesource.com/c/go/+/316752
Trust: Than McIntosh <thanm@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Assignment between input parameters causes them to have more than
one "Name", and running this backwards from names to values can end
up confusing (conflating) parameter spill slots.
Around 105a6e9518, this cases a stack overflow running
go test -race encoding/pem
because two slice parameters spill (incorrectly) into the same
stack slots (in the AB?I-defined parameter spill area).
This also tickles a failure in cue, which turned out to be
easier to isolate.
Fixes#45851.
Updates #40724.
Change-Id: I39c56815bd6abb652f1ccbe83c47f4f373a125c3
Reviewed-on: https://go-review.googlesource.com/c/go/+/313212
Trust: David Chase <drchase@google.com>
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Reviewed-by: Cherry Zhang <cherryyz@google.com>
Currently, when "..." argument is passed to non-variadic function, the
compiler may skip that check, but continue checking whether the number
of arguments matches the function signature.
That causes the sanity check which was added in CL 255241 trigger.
Instead, we should report an invalid use of "...", which matches the
behavior of new type checker and go/types.
Fixes#45913
Change-Id: Icbb254052cbcd756bbd41f966c2c8e316c44420f
Reviewed-on: https://go-review.googlesource.com/c/go/+/315796
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
In the register allocator, if possible, we allocate a value to its
desired register (the ideal register for its next use). In some
cases the desired register does not satisfies the value's output
register mask. We should not use the register in this case.
In the following example, v33 is going to be returned as a
function result, so it is allocated to its desired register AX.
However, its Op cannot use AX as output, causing miscompilation.
v33 = CMOVQEQF <int> v24 v28 v29 : AX (~R0[int])
v35 = MakeResult <int,int,mem> v33 v26 v18
Ret v35
Change-Id: Id0f4f27c4b233ee297e83077e3c8494fe193e664
Reviewed-on: https://go-review.googlesource.com/c/go/+/314630
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
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Reviewed-by: Than McIntosh <thanm@google.com>
In CL 255899, we added code to make clearer error when non-bool used
as operand to logical operators. The code is safe, because node type
is guaranteed to be non-nil.
In CL 279442, we refactored typechecking arith, including moving
typechecking logical operators to separate case. Now we have to
explicitly check if operand type is not nil, because calling Expr can
set operand type nil for non-bool operands.
Fixes#45804
Change-Id: Ie2b6e18f65c0614a803b343f60e78ee1d660bbeb
Reviewed-on: https://go-review.googlesource.com/c/go/+/314209
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Ensure that formal parameter Names are correctly copied and marked
with the correct Curfn. We need to ensure this even when the underlying
closure has no type parameters.
(Aside: it is strange that the types of things contain formal
parameter names that need to be copied. Maybe that's an underlying
larger problem that needs to be fixed.)
Fixes#45738
Change-Id: Ia13d69eea992ff7080bd44065115bc52eb624e73
Reviewed-on: https://go-review.googlesource.com/c/go/+/313652
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
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The transform functions (specifically transformArgs, which is used from
transformCall/transformReturn) require that ir.CurFunc is set correctly.
Since transformCall() is used on the call of an instantiated generic
function, we need to set ir.CurFunc correctly in stencil(). Also,
correctly save/restore ir.CurFunc in genericSubst().
Without this fix, ir.CurFunc can be nil when we call TransformCall()
from stencil(), which leads to some temp variables being added
incorrectly to ir.TodoFunc (which leads to the fatal panic in the
issue).
Fixes#45722
Change-Id: Iddf4a67d28f2100dde8cde5dbc9ca1e00dad6089
Reviewed-on: https://go-review.googlesource.com/c/go/+/313869
Run-TryBot: Dan Scales <danscales@google.com>
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Reviewed-by: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
It's not a predeclared type, but a type defined in "unsafe" package.
Fixes#44830
Change-Id: If39815b1070059b608be8231dfac9b7f3307cb15
Reviewed-on: https://go-review.googlesource.com/c/go/+/313349
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Within clovar, n.Defn can also be *ir.TypeSwitchGuard. The proper fix
here would be to populate m.Defn and have it filled in too, but we
already leave it nil in inlvar. So for consistency, this CL does the
same in clovar too.
Eventually inl.go should be rewritten to fully respect IR invariants.
Fixes#45743.
Change-Id: I8b38e5d8b2329ad242de97670f2141f713954d28
Reviewed-on: https://go-review.googlesource.com/c/go/+/313289
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
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Trust: Dan Scales <danscales@google.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
The previous fix to ensure early evaluation of lvalue-init statements
(CL 312632) added it after we'd already peeled away any array-OINDEX
expressions. But those might have init statements too, so we need to
do this earlier actually and perhaps more than once.
Longer term, lvalue expressions shouldn't have init statements anyway.
But rsc and I both spent a while looking into this earlier in the dev
cycle and couldn't come up with anything reasonable.
Fixes#45706.
Change-Id: I2d19c5ba421b3f019c62eec45774c84cf04b30ef
Reviewed-on: https://go-review.googlesource.com/c/go/+/313011
Trust: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Cherry Zhang <cherryyz@google.com>
CL 281152 improved ascompatee by removing the call to safeExpr on lhs.
But we forgot that lhs int statements, if any, must be walked prior
saving subexpressions, which cause the bug in #45706.
Fixes#45706
Change-Id: I0064315056ef4ca92ebf3c332c2e3a9bb2b26f68
Reviewed-on: https://go-review.googlesource.com/c/go/+/312632
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Currently, when copying definition node of an inlined var, we do not
update var Defn field to point to new copied node. That causes all
inlined vars point to the same Defn, and ir.StaticValue can not find
inlined var in the lhs of its definition.
clovar creates new ONAME node for local variables or params of closure
inside inlined function, by copying most of the old node fields. So the
new Node.Defn is not modified, its lhs still refer to old node
instead of new one.
To fix this, we need to do two things:
- In subst.clovar, set a dummy Defn node for inlvar
- During subst.node, when seeing OAS/OAS2 nodes, after substituting, we
check if any node in lhs has the dummy Defn, then set it to the current
OAS/OAS2 node.
Fixes#45606
Change-Id: Ib517b753a7643756dcd61d36deae60f1a0fc53c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/312630
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>
The defer wrapping feature added to the compiler's "order" phase
creates temporaries into which it copies defer arguments. If one of
these temps is large enough that we place it into the defer closure by
address (as opposed to by value), then the temp in question can't be
reused later on in the order phase, nor do we want a VARKILL
annotation for it at the end of the current block scope.
Test written by Cherry.
Updates #40724.
Change-Id: Iec7efd87ec5a3e3d7de41cdcc7f39c093ed1e815
Reviewed-on: https://go-review.googlesource.com/c/go/+/312869
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This is a port of CL 312212, CL 312591 (except check_test.go), and
CL 312790 to types2.
Updates #19367.
Updates #40481.
Change-Id: I58ba0b0dad157baba3f82c909d5eb1268b931be4
Reviewed-on: https://go-review.googlesource.com/c/go/+/312511
Trust: Matthew Dempsky <mdempsky@google.com>
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Reviewed-by: Robert Griesemer <gri@golang.org>
If the address of an auto is used in a Call, we need to keep it,
as we keep the Call itself.
Fixes#45693.
Change-Id: Ie548d6dffc95bf916868a8885d4ab4cf9e86355a
Reviewed-on: https://go-review.googlesource.com/c/go/+/312670
Trust: Cherry Zhang <cherryyz@google.com>
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Now that we can set experiments at build time instead of make.bash time,
we can actually write a test for field tracking!
Update #20014
This CL contains a test for the functionality fixed in CL 312069.
Change-Id: I7569a7057bbc7c88ae25ae7bf974b0c8a4e35be8
Reviewed-on: https://go-review.googlesource.com/c/go/+/312217
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This reverts CL 311829, and reenables CL 309330. The issue
should be fixed in the previous CL.
Change-Id: I69db0565c72470a1814f135d8f8ec62c781bfc5a
Reviewed-on: https://go-review.googlesource.com/c/go/+/312094
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Reviewed-by: Than McIntosh <thanm@google.com>
Apparently CL 309330 caused the compiler OOMing on some large
input (giant generated switch statement). I don't quite understand
it for now. Disable it for now.
Change-Id: I19c84f3f5e158897bff0b32d6217fcff3c66874d
Reviewed-on: https://go-review.googlesource.com/c/go/+/311829
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When creating the temporary for map functions, if the key
contains pointer, we need to create pointer-typed temporary. So
if the temporary is live across a function call, the pointer is
live.
Change-Id: Id6e14ec9def8bc7987f0f8ce8423caf1e3754fcb
Reviewed-on: https://go-review.googlesource.com/c/go/+/311379
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Currently, if we have AX=a and BX=b, and we want to make a call
F(1, a, b), to move arguments into the desired registers it emits
MOVQ AX, CX
MOVL $1, AX // AX=1
MOVQ BX, DX
MOVQ CX, BX // BX=a
MOVQ DX, CX // CX=b
This has a few redundant moves.
This is because we process inputs in order. First, allocate 1 to
AX, which kicks out a (in AX) to CX (a free register at the
moment). Then, allocate a to BX, which kicks out b (in BX) to DX.
Finally, put b to CX.
Notice that if we start with allocating CX=b, then BX=a, AX=1,
we will not have redundant moves. This CL reduces redundant moves
by allocating them in different order: First, for inpouts that are
already in place, keep them there. Then allocate free registers.
Then everything else.
before after
cmd/compile binary size 23703888 23609680
text size 8565899 8533291
(with regabiargs enabled.)
Change-Id: I69e1bdf745f2c90bb791f6d7c45b37384af1e874
Reviewed-on: https://go-review.googlesource.com/c/go/+/311371
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
With defer/go wrapping and register arguments, some liveness info
changed and live.go test was disabled for regabi. This CL adds a
new one for regabi.
Change-Id: I65f03a6ef156366d8b76c62a16251c3e818f4b02
Reviewed-on: https://go-review.googlesource.com/c/go/+/311369
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
CL 256798 added compiler ability to retain only used interface methods,
by generating a mark relocation whenever an interface method is used. To
do that, the compiler needs the current function linker object.
However, for unnamed function "func _()", its linker object is nil,
causes the compiler crashes for code in #45258.
CL 283313 fixed the code in #45258 unintentionally, since when the
compiler now does not walk unnamed functions anymore.
This CL fixes the root issue, by making reflectdata.MarkUsedIfaceMethod
skips unnamed functions, and also adding regression test.
Fixes#45258
Change-Id: I4cbefb0a89d9928f70c00dc8a271cb61cd20a49c
Reviewed-on: https://go-review.googlesource.com/c/go/+/311130
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Reviewed-by: Keith Randall <khr@golang.org>
The build.Default context really needs to accurately describe
the default build context. The goexperiment tags being a special
case in the go command violates that rule and is the root cause
of the various try-bot failures blocking the enabling of regabi.
(The cleanups I made in golang.org/x/tools were long overdue
but are not strictly necessary for making regabi work; this CL is.)
Having moved the GOEXPERIMENT parsing into internal/buildcfg,
go/build can now use it to set up build.Default, in the new field
ToolTags, meant to hold toolchain-determined tags (for now,
just the experiments). And at the same time we can remove the
duplication of GOOS and GOARCH defaults.
And then once build.Default is set up accurately, the special case
code in cmd/go itself can be removed, and the special case code
in test/run.go is at least a bit less special.
Change-Id: Ib7394e10aa018e492cb9a83fb8fb9a5011a8c25b
Reviewed-on: https://go-review.googlesource.com/c/go/+/310732
Trust: Russ Cox <rsc@golang.org>
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Reviewed-by: Austin Clements <austin@google.com>
Currently, run.go sets GOEXPERIMENT build tags based on the
*difference* from the baseline experiment configuration, rather than
the absolute experiment configuration. This differs from cmd/go. As a
result, if we set a baseline configuration and don't override it with
a GOEXPERIMENT setting, run.go won't set any GOEXPERIMENT build tags,
instead of setting the tags corresponding to the baseline
configuration.
Fix this by making compile -V=goexperiment produce the full
GOEXPERIMENT configuration, which run.go can then use to set exactly
the right set of build tags.
For #40724.
Change-Id: Ieda6ea62f1a1fabbe8d749d6d09c198fd5ca8377
Reviewed-on: https://go-review.googlesource.com/c/go/+/310171
Trust: Austin Clements <austin@google.com>
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Reviewed-by: Cherry Zhang <cherryyz@google.com>
Only complain about missing type; leave it to type-checking
to decide whether "..." is permitted in the first place.
Fixes#43674.
Change-Id: Icbc8f084e364fe3ac16076406a134354219c08d0
Reviewed-on: https://go-review.googlesource.com/c/go/+/310209
Trust: Robert Griesemer <gri@golang.org>
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Reviewed-by: Robert Findley <rfindley@google.com>
Change-Id: I28a1910890659aaa449ffd2a847cd4ced5a8600d
Reviewed-on: https://go-review.googlesource.com/c/go/+/310211
Trust: Keith Randall <khr@golang.org>
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Add in some missing global assignment ops to the list of globals ops
that should be traversed to look for generic function instantiations.
The most common other one for global assigments (and the relevant one
for this bug) is OAS2FUNC, but also look at global assigments with
OAS2DOTTYPE, OAS2MAPR, OAS2RECV, and OASOP.
Bonus small fix: get rid of -G=3 case in ir.IsAddressable. Now that we
don't call the old typechecker from noder2, we don't need this -G-3
check anymore.
Fixes#45547.
Change-Id: I75fecec55ea0d6f62e1c2294d4d77447ed9be6ae
Reviewed-on: https://go-review.googlesource.com/c/go/+/310210
Trust: Dan Scales <danscales@google.com>
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Fixes this failure:
go test cmd/compile/internal/ssa -run TestStmtLines -v
=== RUN TestStmtLines
stmtlines_test.go:115: Saw too many (amd64, > 1%) lines without
statement marks, total=88263, nostmt=1930
('-run TestStmtLines -v' lists failing lines)
The failure has two causes.
One is that the first-line adjuster in code generation was relocating
"first lines" to instructions that would either not have any code generated,
or would have the statment marker removed by a different believed-good heuristic.
The other was that statement boundaries were getting attached to register
values (that with the old ABI were loads from the stack, hence real instructions).
The register values disappear at code generation.
The fixes are to (1) note that certain instructions are not good choices for
"first value" and skip them, and (2) in an expandCalls post-pass, look for
register valued instructions and under appropriate conditions move their
statement marker to a compatible use.
Also updates TestStmtLines to always log the score, for easier comparison of
minor compiler changes.
Updates #40724.
Change-Id: I485573ce900e292d7c44574adb7629cdb4695c3f
Reviewed-on: https://go-review.googlesource.com/c/go/+/309649
Trust: David Chase <drchase@google.com>
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For OMETHEXPR, the Name in the Selection needs to be properly
linked up to the method declaration. Use the same code we
already have for ODOTMETH and OCALLPART to do that.
Fixes#45503
Change-Id: I7d6f886d606bae6faad8c104f50c177f871d41c8
Reviewed-on: https://go-review.googlesource.com/c/go/+/309831
Trust: Keith Randall <khr@golang.org>
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Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Dan Scales <danscales@google.com>
For the new export/import of node types, we were just missing setting
the types of the closure variables (which have the same types as the
captured variables) and the OCLOSURE node itself (which has the same
type as the Func node).
Re-enabled inlining of functions with closures.
Change-Id: I687149b061f3ffeec3244ff02dc6e946659077a9
Reviewed-on: https://go-review.googlesource.com/c/go/+/308974
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Reviewed-by: Keith Randall <khr@golang.org>
Some codegen tests were written with the assumption that
arguments and results are in memory, and with a specific stack
layout. With the register ABI, the assumption is no longer true.
Adjust the tests to work with both cases.
- For tests expecting in memory arguments/results, change to use
global variables or memory-assigned argument/results.
- Allow more registers. E.g. some tests expecting register names
contain only letters (e.g. AX), but it can also contain numbers
(e.g. R10).
- Some instruction selection changes when operate on register vs.
memory, e.g. ADDQ vs. LEAQ, MOVB vs. MOVL. Accept both.
TODO: mathbits.go and memops.go still need fix.
Change-Id: Ic5932b4b5dd3f5d30ed078d296476b641420c4c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/309335
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
If GOEXPERIMENT environment variable is unset, use the default
value that is baked into the toolchain (instead of no
experiments).
Change-Id: I41f863e6f7439f2d53e3ebd25a7d9cf4a176e32e
Reviewed-on: https://go-review.googlesource.com/c/go/+/309333
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>
Include type information on exported function bodies, so that the
importer does not have to re-typecheck the body. This involves
including type information in the encoded output, as well as
avoiding some of the opcode rewriting and other changes that the
old exporter did assuming there would be a re-typechecking pass.
This CL could be considered a cleanup, but is more important than that
because it is an enabling change for generics. Without this CL, we'd
have to upgrade the current typechecker to understand generics. With
this CL, the current typechecker can mostly go away in favor of the
types2 typechecker.
For now, inlining of functions that contain closures is turned off.
We will hopefully resolve this before freeze.
Object files are only 0.07% bigger.
Change-Id: I85c9da09f66bfdc910dc3e26abb2613a1831634d
Reviewed-on: https://go-review.googlesource.com/c/go/+/301291
Trust: Keith Randall <khr@golang.org>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Dan Scales <danscales@google.com>
A quick check of the source to run.go suggests that it does not
look for the new-style build tags.
Updates #45465.
Change-Id: Ib4be040935d71e732f81d52c4a22c2b514195f40
Reviewed-on: https://go-review.googlesource.com/c/go/+/308934
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Trust: David Chase <drchase@google.com>
This tickles some other bug, do this to clear builders.
Updates #40724.
Updates #45465.
Change-Id: Id51efbcf474865da231fcbc6216e5d604f99c296
Reviewed-on: https://go-review.googlesource.com/c/go/+/308889
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
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>
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>
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>
