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if LHS is address-taken
A composite literal assignment
x = T{field: v}
may be compiled to
x = T{}
x.field = v
We already do not use this form is RHS uses LHS. If LHS is
address-taken, RHS may uses LHS implicitly, e.g.
v = &x.field
x = T{field: *v}
The lowering above would change the value of RHS (*v).
Updates #52953.
Fixes #52960.
Change-Id: I3f798e00598aaa550b8c17182c7472fef440d483
Reviewed-on: https://go-review.googlesource.com/c/go/+/407014
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
(cherry picked from commit 1c77137d4fdfbb3e7e8d9efaab3bab5ee736a19d)
Reviewed-on: https://go-review.googlesource.com/c/go/+/419451
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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Following CL 309029, this CL does the same thing for map
functions (mapaccess, mapassign, mapdelete).
For simplicity, always wrap "defer delete(m, k)". With
regabidefers enabled, this call is wrapped in a closure and the
rewriting happens automatically. Without regabidefers, it may not
be wrapped for certain key types, and then we'd need special
handling of the delete (because earlier the order pass does not
handle it). And we will turn on defer wrapping by default anyway.
Change-Id: I30663b1aa8e1d6f98e1fb81bf8c0c0ce607ab80b
Reviewed-on: https://go-review.googlesource.com/c/go/+/309510
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>
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Static tmps are private to a package, but with plugins a package
can be shared among multiple DSOs. They need to have a consistent
view of the static tmps, especially for writable ones. So export
them. (Read-only static tmps have the same values anyway, so it
doesn't matter. Also Mach-O doesn't support dynamically exporting
read-only symbols anyway.)
Fixes #44956.
Change-Id: I921e25b7ab73cd5d5347800eccdb7931e3448779
Reviewed-on: https://go-review.googlesource.com/c/go/+/301793
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>
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functions
Those functions only use (*ir.Name).Linksym(), so just change them to
get an *obj.LSym directly. This helps get rid of un-necessary
validations that their callers have already done.
Passes toolstash -cmp.
For #43737.
Change-Id: Ifd6c2525e472f8e790940bc167665f9d74dd1bc5
Reviewed-on: https://go-review.googlesource.com/c/go/+/284121
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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This CL simplifies the previous one a little bit further, by combining
reordering stack-temporary initialization and getting rid of an
unneeded temporary variable. (Does not pass toolstash -cmp.)
Change-Id: I17799dfe368484f33a8ddd0ab4f68647d6262147
Reviewed-on: https://go-review.googlesource.com/c/go/+/284225
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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This CL adds a few new helper functions for constructing and
initializing temporary variables during walk.
Passes toolstash -cmp.
Change-Id: I54965d992cd8dfef7cb7dc92a17c88372e52a0d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/284224
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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This CL moves almost all PAUTOHEAP handling code to SSA construction.
Instead of changing Names to PAUTOHEAP, escape analysis now only sets
n.Esc() to ir.EscHeap, and SSA handles creating the "&x"
pseudo-variables and associating them via Heapaddr.
This CL also gets rid of n.Stackcopy, which was used to distinguish
the heap copy of a parameter used within a function from the stack
copy used in the function calling convention. In practice, this is
always obvious from context: liveness and function prologue/epilogue
want to know about the stack copies, and everywhere else wants the
heap copy.
Hopefully moving all parameter/result handling into SSA helps with
making the register ABI stuff easier.
Also, the only remaining uses of PAUTOHEAP are now for closure
variables, so I intend to rename it to PCLOSUREVAR or get rid of those
altogether too. But this CL is already big and scary enough.
Change-Id: Ief5ef6205041b9d0ee445314310c0c5a98187e77
Reviewed-on: https://go-review.googlesource.com/c/go/+/283233
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: David Chase <drchase@google.com>
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These aren't part of the Node interface anymore, so no need to keep
them around.
Passes toolstash -cmp.
[git-generate]
cd src/cmd/compile/internal/ir
: Fix one off case that causes trouble for rf.
sed -i -e 's/n.SetClass(ir.PAUTO)/n.Class_ = ir.PAUTO/' ../ssa/export_test.go
pkgs=$(go list . ../...)
rf '
ex '"$(echo $pkgs)"' {
var n *Name
var c Class
n.Class() -> n.Class_
n.SetClass(c) -> n.Class_ = c
}
rm Name.Class
rm Name.SetClass
mv Name.Class_ Name.Class
'
Change-Id: Ifb304bf4691a8c455456aabd8aa77178d4a49500
Reviewed-on: https://go-review.googlesource.com/c/go/+/281294
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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For being consistent with other Prealloc fields.
[git-generate]
cd src/cmd/compile/internal/ir
rf '
mv AddrExpr.Alloc AddrExpr.Prealloc
'
go generate
Change-Id: Id1b05119092036e3f8208b73b63bd0ca6ceb7b15
Reviewed-on: https://go-review.googlesource.com/c/go/+/279450
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
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Passes toolstash -cmp.
[git-generate]
cd src/cmd/compile/internal/gc
pkgs=$(grep -l -w Linksym ../*/*.go | xargs dirname | grep -v '/gc$' | sort -u)
rf '
ex . '"$(echo $pkgs)"' {
import "cmd/compile/internal/ir"
import "cmd/compile/internal/reflectdata"
import "cmd/compile/internal/staticdata"
import "cmd/compile/internal/types"
avoid reflectdata.TypeLinksym
avoid reflectdata.TypeLinksymLookup
avoid reflectdata.TypeLinksymPrefix
avoid staticdata.FuncLinksym
var f *ir.Func
var n *ir.Name
var s string
var t *types.Type
f.Sym().Linksym() -> f.Linksym()
n.Sym().Linksym() -> n.Linksym()
reflectdata.TypeSym(t).Linksym() -> reflectdata.TypeLinksym(t)
reflectdata.TypeSymPrefix(s, t).Linksym() -> reflectdata.TypeLinksymPrefix(s, t)
staticdata.FuncSym(n.Sym()).Linksym() -> staticdata.FuncLinksym(n)
types.TypeSymLookup(s).Linksym() -> reflectdata.TypeLinksymLookup(s)
}
'
Change-Id: I7a3ae1dcd61bcdf4a29f708ff12f7f80c2b280c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/280640
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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These three expression nodes all represent the same syntax, and so
they're represented the same within types2. And also they're not
handled that meaningfully differently throughout the rest of the
compiler to merit unique representations.
Method expressions are somewhat unique today that they're very
frequently turned into plain function names. But eventually that can
be handled by a post-typecheck desugaring phase that reduces the
number of redundant AST forms.
Passes toolstash -cmp.
Change-Id: I20df91bbd0d885c1f18ec67feb61ae1558670719
Reviewed-on: https://go-review.googlesource.com/c/go/+/280636
Trust: Matthew Dempsky <mdempsky@google.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
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After reorder3's simplification, the only remaining use of
refersToCommonName is in oaslit, where the LHS expression is always a
single name. We can replace the now overly-generalized
refersToCommonName with a simple ir.Any traversal with ir.Uses.
Passes toolstash -cmp.
Change-Id: Ice3020cdbbf6083d52e07866a687580f4eb134b8
Reviewed-on: https://go-review.googlesource.com/c/go/+/280439
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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Passes toolstash -cmp.
Change-Id: I4e31154d04d99f2b80bec6a2c571a2a4a3f2ec99
Reviewed-on: https://go-review.googlesource.com/c/go/+/279959
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matthew Dempsky <mdempsky@google.com>
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walkexpr1 is the second largest non-machine-generated function in the compiler.
weighing in at 1,164 lines. Since we are destroying the git blame history
anyway, now is a good time to split each different case into its own function,
making future work on this function more manageable.
Do the same to walkstmt too for consistency, even though it is a paltry 259 lines.
[git-generate]
cd src/cmd/compile/internal/walk
rf '
mv addstr walkAddString
mv walkCall walkCall1
mv walkpartialcall walkCallPart
mv walkclosure walkClosure
mv walkrange walkRange
mv walkselect walkSelect
mv walkselectcases walkSelectCases
mv walkswitch walkSwitch
mv walkExprSwitch walkSwitchExpr
mv walkTypeSwitch walkSwitchType
mv walkstmt walkStmt
mv walkstmtlist walkStmtList
mv walkexprlist walkExprList
mv walkexprlistsafe walkExprListSafe
mv walkexprlistcheap walkExprListCheap
mv walkexpr walkExpr
mv walkexpr1 walkExpr1
mv walkprint walkPrint
mv walkappend walkAppend
mv walkcompare walkCompare
mv walkcompareInterface walkCompareInterface
mv walkcompareString walkCompareString
mv appendslice appendSlice
mv cheapexpr cheapExpr
mv copyany walkCopy
mv copyexpr copyExpr
mv eqfor eqFor
mv extendslice extendSlice
mv finishcompare finishCompare
mv safeexpr safeExpr
mv walkStmt:/^\tcase ir.ORECV:/+2,/^\tcase /-2 walkRecv
add walk.go:/^func walkRecv/-0 \
// walkRecv walks an ORECV node.
mv walkStmt:/^\tcase ir.ODCL:/+2,/^\tcase /-2 walkDecl
add walk.go:/^func walkDecl/-0 \
// walkDecl walks an ODCL node.
mv walkStmt:/^\tcase ir.OGO:/+2,/^\tcase /-2 walkGoDefer
add walk.go:/^func walkGoDefer/-0 \
// walkGoDefer walks an OGO or ODEFER node.
mv walkStmt:/^\tcase ir.OFOR,/+2,/^\tcase /-2 walkFor
add walk.go:/^func walkFor/-0 \
// walkFor walks an OFOR or OFORUNTIL node.
mv walkStmt:/^\tcase ir.OIF:/+2,/^\tcase /-2 walkIf
add walk.go:/^func walkIf/-0 \
// walkIf walks an OIF node.
mv walkStmt:/^\tcase ir.ORETURN:/+2,/^\tcase /-2 walkReturn
add walk.go:/^func walkReturn/-0 \
// walkReturn walks an ORETURN node.
mv walkExpr1:/^\tcase ir.ODOT,/+2,/^\tcase /-2 walkDot
add walk.go:/^func walkDot/-0 \
// walkDot walks an ODOT or ODOTPTR node.
mv walkExpr1:/^\tcase ir.ODOTTYPE,/+2,/^\tcase /-2 walkDotType
add walk.go:/^func walkDotType/-0 \
// walkDotType walks an ODOTTYPE or ODOTTYPE2 node.
mv walkExpr1:/^\tcase ir.OLEN,/+2,/^\tcase /-2 walkLenCap
add walk.go:/^func walkLenCap/-0 \
// walkLenCap walks an OLEN or OCAP node.
mv walkExpr1:/^\tcase ir.OANDAND,/+2,/^\tcase /-2 walkLogical
add walk.go:/^func walkLogical/-0 \
// walkLogical walks an OANDAND or OOROR node.
mv walkExpr1:/^\tcase ir.OCALLINTER,/+2,/^\tcase /-2 walkCall
add walk.go:/^func walkCall/-0 \
// walkCall walks an OCALLFUNC, OCALLINTER, or OCALLMETH node.
mv walkExpr1:/^\tcase ir.OAS,/+1,/^\tcase /-2 walkAssign
add walk.go:/^func walkAssign/-0 \
// walkAssign walks an OAS (AssignExpr) or OASOP (AssignOpExpr) node.
mv walkExpr1:/^\tcase ir.OAS2:/+2,/^\tcase /-3 walkAssignList
add walk.go:/^func walkAssignList/-0 \
// walkAssignList walks an OAS2 node.
mv walkExpr1:/^\tcase ir.OAS2FUNC:/+2,/^\tcase /-4 walkAssignFunc
add walk.go:/^func walkAssignFunc/-0 \
// walkAssignFunc walks an OAS2FUNC node.
mv walkExpr1:/^\tcase ir.OAS2RECV:/+2,/^\tcase /-3 walkAssignRecv
add walk.go:/^func walkAssignRecv/-0 \
// walkAssignRecv walks an OAS2RECV node.
mv walkExpr1:/^\tcase ir.OAS2MAPR:/+2,/^\tcase /-2 walkAssignMapRead
add walk.go:/^func walkAssignMapRead/-0 \
// walkAssignMapRead walks an OAS2MAPR node.
mv walkExpr1:/^\tcase ir.ODELETE:/+2,/^\tcase /-2 walkDelete
add walk.go:/^func walkDelete/-0 \
// walkDelete walks an ODELETE node.
mv walkExpr1:/^\tcase ir.OAS2DOTTYPE:/+2,/^\tcase /-2 walkAssignDotType
add walk.go:/^func walkAssignDotType/-0 \
// walkAssignDotType walks an OAS2DOTTYPE node.
mv walkExpr1:/^\tcase ir.OCONVIFACE:/+2,/^\tcase /-2 walkConvInterface
add walk.go:/^func walkConvInterface/-0 \
// walkConvInterface walks an OCONVIFACE node.
mv walkExpr1:/^\tcase ir.OCONV,/+2,/^\tcase /-2 walkConv
add walk.go:/^func walkConv/-0 \
// walkConv walks an OCONV or OCONVNOP (but not OCONVIFACE) node.
mv walkExpr1:/^\tcase ir.ODIV,/+2,/^\tcase /-2 walkDivMod
add walk.go:/^func walkDivMod/-0 \
// walkDivMod walks an ODIV or OMOD node.
mv walkExpr1:/^\tcase ir.OINDEX:/+2,/^\tcase /-2 walkIndex
add walk.go:/^func walkIndex/-0 \
// walkIndex walks an OINDEX node.
# move type assertion above comment
mv walkExpr1:/^\tcase ir.OINDEXMAP:/+/n := n/-+ walkExpr1:/^\tcase ir.OINDEXMAP:/+0
mv walkExpr1:/^\tcase ir.OINDEXMAP:/+2,/^\tcase /-2 walkIndexMap
add walk.go:/^func walkIndexMap/-0 \
// walkIndexMap walks an OINDEXMAP node.
mv walkExpr1:/^\tcase ir.OSLICEHEADER:/+2,/^\tcase /-2 walkSliceHeader
add walk.go:/^func walkSliceHeader/-0 \
// walkSliceHeader walks an OSLICEHEADER node.
mv walkExpr1:/^\tcase ir.OSLICE,/+2,/^\tcase /-2 walkSlice
add walk.go:/^func walkSlice/-0 \
// walkSlice walks an OSLICE, OSLICEARR, OSLICESTR, OSLICE3, or OSLICE3ARR node.
mv walkExpr1:/^\tcase ir.ONEW:/+2,/^\tcase /-2 walkNew
add walk.go:/^func walkNew/-0 \
// walkNew walks an ONEW node.
# move type assertion above comment
mv walkExpr1:/^\tcase ir.OCLOSE:/+/n := n/-+ walkExpr1:/^\tcase ir.OCLOSE:/+0
mv walkExpr1:/^\tcase ir.OCLOSE:/+2,/^\tcase /-2 walkClose
add walk.go:/^func walkClose/-0 \
// walkClose walks an OCLOSE node.
# move type assertion above comment
mv walkExpr1:/^\tcase ir.OMAKECHAN:/+/n := n/-+ walkExpr1:/^\tcase ir.OMAKECHAN:/+0
mv walkExpr1:/^\tcase ir.OMAKECHAN:/+2,/^\tcase /-2 walkMakeChan
add walk.go:/^func walkMakeChan/-0 \
// walkMakeChan walks an OMAKECHAN node.
mv walkExpr1:/^\tcase ir.OMAKEMAP:/+2,/^\tcase /-2 walkMakeMap
add walk.go:/^func walkMakeMap/-0 \
// walkMakeMap walks an OMAKEMAP node.
mv walkExpr1:/^\tcase ir.OMAKESLICE:/+2,/^\tcase /-2 walkMakeSlice
add walk.go:/^func walkMakeSlice/-0 \
// walkMakeSlice walks an OMAKESLICE node.
mv walkExpr1:/^\tcase ir.OMAKESLICECOPY:/+2,/^\tcase /-2 walkMakeSliceCopy
add walk.go:/^func walkMakeSliceCopy/-0 \
// walkMakeSliceCopy walks an OMAKESLICECOPY node.
mv walkExpr1:/^\tcase ir.ORUNESTR:/+2,/^\tcase /-2 walkRuneToString
add walk.go:/^func walkRuneToString/-0 \
// walkRuneToString walks an ORUNESTR node.
mv walkExpr1:/^\tcase ir.OBYTES2STR,/+2,/^\tcase /-2 walkBytesRunesToString
add walk.go:/^func walkBytesRunesToString/-0 \
// walkBytesRunesToString walks an OBYTES2STR or ORUNES2STR node.
mv walkExpr1:/^\tcase ir.OBYTES2STRTMP:/+2,/^\tcase /-2 walkBytesToStringTemp
add walk.go:/^func walkBytesToStringTemp/-0 \
// walkBytesToStringTemp walks an OBYTES2STRTMP node.
mv walkExpr1:/^\tcase ir.OSTR2BYTES:/+2,/^\tcase /-2 walkStringToBytes
add walk.go:/^func walkStringToBytes/-0 \
// walkStringToBytes walks an OSTR2BYTES node.
# move type assertion above comment
mv walkExpr1:/^\tcase ir.OSTR2BYTESTMP:/+/n := n/-+ walkExpr1:/^\tcase ir.OSTR2BYTESTMP:/+0
mv walkExpr1:/^\tcase ir.OSTR2BYTESTMP:/+2,/^\tcase /-2 walkStringToBytesTemp
add walk.go:/^func walkStringToBytesTemp/-0 \
// walkStringToBytesTemp walks an OSTR2BYTESTMP node.
mv walkExpr1:/^\tcase ir.OSTR2RUNES:/+2,/^\tcase /-2 walkStringToRunes
add walk.go:/^func walkStringToRunes/-0 \
// walkStringToRunes walks an OSTR2RUNES node.
mv walkExpr1:/^\tcase ir.OARRAYLIT,/+1,/^\tcase /-2 walkCompLit
add walk.go:/^func walkCompLit/-0 \
// walkCompLit walks a composite literal node: \
// OARRAYLIT, OSLICELIT, OMAPLIT, OSTRUCTLIT (all CompLitExpr), or OPTRLIT (AddrExpr).
mv walkExpr1:/^\tcase ir.OSEND:/+2,/^\tcase /-2 walkSend
add walk.go:/^func walkSend/-0 \
// walkSend walks an OSEND node.
mv walkStmt walkStmtList \
walkDecl \
walkFor \
walkGoDefer \
walkIf \
wrapCall \
stmt.go
mv walkExpr walkExpr1 walkExprList walkExprListCheap walkExprListSafe \
cheapExpr safeExpr copyExpr \
walkAddString \
walkCall \
walkCall1 \
walkDivMod \
walkDot \
walkDotType \
walkIndex \
walkIndexMap \
walkLogical \
walkSend \
walkSlice \
walkSliceHeader \
reduceSlice \
bounded \
usemethod \
usefield \
expr.go
mv \
walkAssign \
walkAssignDotType \
walkAssignFunc \
walkAssignList \
walkAssignMapRead \
walkAssignRecv \
walkReturn \
fncall \
ascompatee \
ascompatee1 \
ascompatet \
reorder3 \
reorder3save \
aliased \
anyAddrTaken \
refersToName \
refersToCommonName \
appendSlice \
isAppendOfMake \
extendSlice \
assign.go
mv \
walkCompare \
walkCompareInterface \
walkCompareString \
finishCompare \
eqFor \
brcom \
brrev \
tracecmpArg \
canMergeLoads \
compare.go
mv \
walkConv \
walkConvInterface \
walkBytesRunesToString \
walkBytesToStringTemp \
walkRuneToString \
walkStringToBytes \
walkStringToBytesTemp \
walkStringToRunes \
convFuncName \
rtconvfn \
byteindex \
walkCheckPtrAlignment \
walkCheckPtrArithmetic \
convert.go
mv \
walkAppend \
walkClose \
walkCopy \
walkDelete \
walkLenCap \
walkMakeChan \
walkMakeMap \
walkMakeSlice \
walkMakeSliceCopy \
walkNew \
walkPrint \
badtype \
callnew \
writebarrierfn \
isRuneCount \
builtin.go
mv \
walkCompLit \
sinit.go \
complit.go
mv subr.go walk.go
'
Change-Id: Ie0cf3ba4adf363c120c134d57cb7ef37934eaab9
Reviewed-on: https://go-review.googlesource.com/c/go/+/279430
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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