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Commit Graph

15 Commits

Author SHA1 Message Date
Alan Donovan
c8a6890a12 go.tools/ssa: fix a bug building SSA code for ast.CompositeLit.
Map literals should use the same recursion logic as
struct/array/slice literals to apply an implicit &-operator to
the nested literals when a pointer is wanted.

+ test.

Also:
- ensure we set the source location for all Lookup and
  MapUpdate instructions.
- remove obsolete address.object field.

R=gri, crawshaw
CC=golang-dev
https://golang.org/cl/12787048
2013-08-22 10:13:51 -04:00
Alan Donovan
3b53279d8f go.tools/ssa: preserve type of &&/|| operands in result.
+ test.

With this change, the Go Oracle is now self-aware. :)

R=gri, rsc
CC=golang-dev
https://golang.org/cl/12381043
2013-08-19 12:50:40 -04:00
Robert Griesemer
eae0511b70 go.tools/ssa/interp: fix build
fallthrough's are now checked - adjust
now illegal test.

TBR: adonovan

R=adonovan
CC=golang-dev
https://golang.org/cl/12041052
2013-07-30 20:28:18 -07:00
Alan Donovan
fb0642f5fb go.tools/ssa: fix a package-level var initialization order bug.
buildDecl was visiting all decls in source order, but the spec
calls for visiting all vars and init() funcs in order, then
all remaining functions.  These two passes are now called
buildInit(), buildFuncDecl().

+ Test.

Also:
- Added workaround to gcimporter for Func with pkg==nil.
- Prog.concreteMethods has been merged into Pkg.values.
- Prog.concreteMethod() renamed declaredFunc().
- s/mfunc/obj/ (name cleanup from recent gri CL)

R=gri
CC=golang-dev
https://golang.org/cl/12030044
2013-07-29 14:24:09 -04:00
Alan Donovan
ae8016313d go.tools/ssa: tests of method promotion and of interface conversion + bugfixes.
methprom.go covers method promotion.
Found bug: receiver() requires a following load under some
circumstances.

ifaceconv.go covers interface conversion.
Found bug: confusion about infallible and fallible conversions
led to use of TypeAssert in emitConv, which should never fail.
Changed semantics of ChangeInterface to make it infallible
and made some simplifications.

Also in this CL:
- SelectState.Pos now records the position of the
  the '<-' operator for sends/receives done by a Select.

R=gri
CC=golang-dev
https://golang.org/cl/11931044
2013-07-26 21:49:27 -04:00
Alan Donovan
4da31df1c8 go.tools/ssa: (another) major refactoring of method-set logic.
We now use LookupFieldOrMethod for all SelectorExprs, and
simplify the logic to discriminate the various cases.

We inline static calls to promoted/indirected functions,
dramatically reducing the number of functions created.

More tests are needed, but I'd like to submit this as-is.

In this CL, we:
- rely less on Id strings.  Internally we now use
  *types.Method (and its components) almost everywhere.
- stop thinking of types.Methods as objects. They don't
  have stable identities. (Hopefully they will become
  plain-old structs soon.)
- eliminate receiver indirection wrappers:
  indirection and promotion are handled together by makeWrapper.
- Handle the interactions of promotion, indirection and
  abstract methods much more cleanly.
- support receiver-bound interface method closures.
- break up builder.selectField so we can re-use parts
  (emitFieldSelection).
- add importer.PackageInfo.classifySelector utility.
- delete interfaceMethodIndex()
- delete namedTypeMethodIndex()
- delete isSuperInterface() (replaced by types.IsAssignable)
- call memberFromObject on each declared concrete method's
  *types.Func, not on every Method frem each method set, in the
  CREATE phase for packages loaded by gcimporter.

go/types:
- document Func, Signature.Recv() better.
- use fmt in {Package,Label}.String
- reimplement Func.String to be prettier and to include method
  receivers.

API changes:
- Function.method now holds the types.Method (soon to be
  not-an-object) for synthetic wrappers.
- CallCommon.Method now contains an abstract (interface)
  method object; was an abstract method index.
- CallCommon.MethodId() gone.
- Program.LookupMethod now takes a *Method not an Id string.

R=gri
CC=golang-dev
https://golang.org/cl/11674043
2013-07-26 11:22:34 -04:00
Alan Donovan
8846992823 go.tools/ssa: avoid redundant uint64 conversion of right operand of <<, >>.
Also: add sanity check that no Instruction yields a Value of 'untyped' type.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/11011043
2013-07-08 17:33:51 -04:00
Robert Griesemer
cc52b8b7f8 go.tools/go/types: clean up assignment checks (round 1)
Various bug fixes:
- don't allow := to redeclare non-variables
- don't permit a comma-ok expression as a two-value function return

Lots of dead code removed.

Fixes golang/go#5500.

R=adonovan
CC=golang-dev
https://golang.org/cl/10792044
2013-07-08 09:40:30 -07:00
Alan Donovan
ea8ba6f45b go.tools/ssa: fix crash on 'select { case x, ok = <-ch: }' (= not :=).
Added test.

Also:
- abstracted Function.addLocalForIdent (9 calls).
- remove vestige of old typeswitch hack.
- specify and fix CallCommon.Signature() for calls to built-ins.

R=gri
CC=golang-dev
https://golang.org/cl/10884044
2013-07-03 15:10:49 -04:00
Alan Donovan
c24b2413c0 go.tools/ssa: use go/types.LookupFieldOrMethod, and simplify.
Added tests.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/10830043
2013-07-01 15:17:36 -04:00
Alan Donovan
86b0a65b65 go.tools/ssa: emit ChangeType when using method as function in f := T.meth.
Previously: typeOf(f).Signature.Recv == T
       Now: typeOf(f).Signature.Params.At(0) == T

Added test.

BUG=5781

R=gri
CC=golang-dev
https://golang.org/cl/10622043
2013-06-26 13:18:31 -04:00
Alan Donovan
0f26bbae8f go.tools/ssa: fix bug in code emitted for ast.TypeAssertExpr.
var x I = ...
x.(E) may fail dynamically (iff x is nil).

Added a testcase.

R=gri
CC=golang-dev
https://golang.org/cl/10237045
2013-06-13 17:31:32 -04:00
Alan Donovan
1f2812fe9b go.tools/ssa: fix bug in makeBridgeMethod for promoted interfaces.
The method index was hard-coded to zero, which works some of
the time.  Apparently I just forgot to implement the
method-table lookup...

Added regression test.

R=gri
CC=golang-dev
https://golang.org/cl/9916043
2013-05-31 16:36:03 -04:00
Alan Donovan
8cdf1f1cb1 go.tools/ssa: add support for bound-method closures.
Extracted Builder.findMethod function to handle
methodset/receiver logic common to
function calls (Builder.setCall) and
bound method closure creation (Builder.selector).

Capture: added explicit Name, Type fields to Capture instead
of relying on Outer field, which is now un-exported since its
only purpose is to let Builder.expr(case *ast.FuncLit) know
which values to put in the closure; it is nilled immediately
after.

Simplified Function.lookup() logic: there's no need to walk
the Outer chain each time to set Alloc.Heap=true, as it's
already set during creation of the outermost
Capture{outer:*Alloc}.

Added interp/testdata/boundmeth.go test.

Cosmetic changes:
- add support for bound method thunks to Function.FullName().
- Simplified {Literal,Global,Builtin,Function}.String()
- doc: Captures are no longer necessarily addresses.
- added yet another missing pair of "()" (go/types accessors).
- print "Synthetic" not "Declared at -" for synthetic functions.
- use '$' not center-dot in synthetic identifiers (easier to type).

R=gri
CC=golang-dev
https://golang.org/cl/9654043
2013-05-22 17:56:18 -04:00
Rob Pike
01f8cd246d go.tools: add go/types, ssa, and cmd/vet
They will be deleted from their current homes once this has landed.
Changes made to import paths to make the code compile, and to find
errchk in the right place in cmd/vet's Makefile.
TODO in a later CL: tidy up vet.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/9495043
2013-05-17 13:20:39 -07:00