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[dev.typeparams] cmd/compile: clean up instantiation and dictionary naming

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Separate generation of instantiation and dictionary name generation.

Add code to add subdictionaries to a dictionary. Not quite working
yet, as we need to trigger generation of the subdictionaries for methods.

Change-Id: I0d46053eba695b217630b06ef2f990f6a0b52d83
Reviewed-on: https://go-review.googlesource.com/c/go/+/331209
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
This commit is contained in:
Keith Randall 2021-06-26 18:18:16 -07:00
parent dfa8fd861c
commit 5fa6bbc669
3 changed files with 68 additions and 60 deletions
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55
src/cmd/compile/internal/noder/stencil.go
View file

@ -18,7 +18,6 @@ import (
"cmd/internal/src"
"fmt"
"go/constant"
"strings"
)
func assert(p bool) {
@ -519,7 +518,7 @@ func (g *irgen) getInstantiation(nameNode *ir.Name, targs []*types.Type, isMeth
ir.Dump(fmt.Sprintf("\nstenciled %v", st), st)
}
}
return st, g.getDictionary(sym.Name, nameNode, targs)
return st, g.getDictionaryValue(nameNode, targs, isMeth)
}
// Struct containing info needed for doing the substitution as we create the
@ -1017,31 +1016,21 @@ func deref(t *types.Type) *types.Type {
return t
}
// getDictionary returns the dictionary for the named instantiated function, which
// is instantiated from generic function or method gf, with the type arguments targs.
func (g *irgen) getDictionary(name string, gf *ir.Name, targs []*types.Type) ir.Node {
// getDictionarySym returns the dictionary for the named generic function gf, which
// is instantiated with the type arguments targs.
func (g *irgen) getDictionarySym(gf *ir.Name, targs []*types.Type, isMeth bool) *types.Sym {
if len(targs) == 0 {
base.Fatalf("%s should have type arguments", name)
}
// The dictionary for this instantiation is named after the function
// and concrete types it is instantiated with.
// TODO: decouple this naming from the instantiation naming. The instantiation
// naming will be based on GC shapes, this naming must be fully stenciled.
if !strings.HasPrefix(name, ".inst.") {
base.Fatalf("%s should start in .inst.", name)
base.Fatalf("%s should have type arguments", gf.Sym().Name)
}
info := g.getGfInfo(gf)
name = ".dict." + name[6:]
// Get a symbol representing the dictionary.
sym := typecheck.Lookup(name)
sym := typecheck.MakeDictName(gf.Sym(), targs, isMeth)
// Initialize the dictionary, if we haven't yet already.
if lsym := sym.Linksym(); len(lsym.P) == 0 {
infoPrint("Creating dictionary %v\n", name)
infoPrint("Creating dictionary %v\n", sym.Name)
off := 0
// Emit an entry for each targ (concrete type or gcshape).
for _, t := range targs {
@ -1061,8 +1050,8 @@ func (g *irgen) getDictionary(name string, gf *ir.Name, targs []*types.Type) ir.
off = objw.SymPtr(lsym, off, s, 0)
}
// Emit an entry for each subdictionary (after substituting targs)
// TODO: actually emit symbol for the subdictionary entry
for _, n := range info.subDictCalls {
var sym *types.Sym
if n.Op() == ir.OCALL {
call := n.(*ir.CallExpr)
if call.X.Op() == ir.OXDOT {
@ -1071,8 +1060,7 @@ func (g *irgen) getDictionary(name string, gf *ir.Name, targs []*types.Type) ir.
for i, t := range subtargs {
s2targs[i] = subst.Typ(t)
}
sym := typecheck.MakeInstName(ir.MethodSym(call.X.(*ir.SelectorExpr).X.Type(), call.X.(*ir.SelectorExpr).Sel), s2targs, true)
infoPrint(" - Subdict .dict.%v\n", sym.Name[6:])
sym = typecheck.MakeDictName(ir.MethodSym(call.X.(*ir.SelectorExpr).X.Type(), call.X.(*ir.SelectorExpr).Sel), s2targs, true)
} else {
inst := n.(*ir.CallExpr).X.(*ir.InstExpr)
var nameNode *ir.Name
@ -1087,11 +1075,10 @@ func (g *irgen) getDictionary(name string, gf *ir.Name, targs []*types.Type) ir.
for i, t := range subtargs {
subtargs[i] = subst.Typ(t)
}
sym := typecheck.MakeInstName(nameNode.Sym(), subtargs, isMeth)
sym = g.getDictionarySym(nameNode, subtargs, isMeth)
// TODO: This can actually be a static
// main dictionary, if all of the subtargs
// are concrete types (!HasTParam)
infoPrint(" - Subdict .dict.%v\n", sym.Name[6:])
}
} else if n.Op() == ir.OFUNCINST {
inst := n.(*ir.InstExpr)
@ -1100,11 +1087,10 @@ func (g *irgen) getDictionary(name string, gf *ir.Name, targs []*types.Type) ir.
for i, t := range subtargs {
subtargs[i] = subst.Typ(t)
}
sym := typecheck.MakeInstName(nameNode.Sym(), subtargs, false)
sym = g.getDictionarySym(nameNode, subtargs, false)
// TODO: This can actually be a static
// main dictionary, if all of the subtargs
// are concrete types (!HasTParam)
infoPrint(" - Subdict .dict.%v\n", sym.Name[6:])
} else if n.Op() == ir.OXDOT {
selExpr := n.(*ir.SelectorExpr)
subtargs := selExpr.X.Type().RParams()
@ -1112,13 +1098,26 @@ func (g *irgen) getDictionary(name string, gf *ir.Name, targs []*types.Type) ir.
for i, t := range subtargs {
s2targs[i] = subst.Typ(t)
}
sym := typecheck.MakeInstName(ir.MethodSym(selExpr.X.Type(), selExpr.Sel), s2targs, true)
infoPrint(" - Subdict .dict.%v\n", sym.Name[6:])
sym = typecheck.MakeDictName(ir.MethodSym(selExpr.X.Type(), selExpr.Sel), s2targs, true)
}
// TODO: handle closure cases that need sub-dictionaries, get rid of conditional
if sym != nil {
// TODO: uncomment once we're sure all the
// subdictionaries are created correctly.
// Methods above aren't yet generating dictionaries recursively yet.
//off = objw.SymPtr(lsym, off, sym.Linksym(), 0)
infoPrint(" - Subdict %v\n", sym.Name)
}
// TODO: handle closure cases that need sub-dictionaries
}
objw.Global(lsym, int32(off), obj.DUPOK|obj.RODATA)
// Add any new, fully instantiated types seen during the substitution to g.instTypeList.
g.instTypeList = append(g.instTypeList, subst.InstTypeList...)
}
return sym
}
func (g *irgen) getDictionaryValue(gf *ir.Name, targs []*types.Type, isMeth bool) ir.Node {
sym := g.getDictionarySym(gf, targs, isMeth)
// Make a node referencing the dictionary symbol.
n := typecheck.NewName(sym)