mirror of
https://github.com/golang/go
synced 2024-11-24 22:57:57 -07:00
gc: inlining (disabled without -l)
Cross- and intra package inlining of single assignments or return <expression>. Minus some hairy cases, currently including other calls, expressions with closures and ... arguments. R=rsc, rogpeppe, adg, gri CC=golang-dev https://golang.org/cl/5400043
This commit is contained in:
Luuk van Dijk
parent
e25a83d03e
commit
a62722bba4
@ -27,6 +27,7 @@ OFILES=\
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fmt.$O\
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gen.$O\
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init.$O\
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inl.$O\
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lex.$O\
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md5.$O\
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mparith1.$O\
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@ -7,7 +7,7 @@
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#include "go.h"
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#include "y.tab.h"
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static void dumpexporttype(Type*);
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static void dumpexporttype(Type *t);
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// Mark n's symbol as exported
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void
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@ -78,7 +78,7 @@ dumppkg(Pkg *p)
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{
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char *suffix;
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if(p == nil || p == localpkg || p->exported)
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if(p == nil || p == localpkg || p->exported || p == builtinpkg)
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return;
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p->exported = 1;
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suffix = "";
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@ -87,6 +87,68 @@ dumppkg(Pkg *p)
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Bprint(bout, "\timport %s \"%Z\"%s\n", p->name, p->path, suffix);
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}
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// Look for anything we need for the inline body
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static void reexportdep(Node *n);
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static void
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reexportdeplist(NodeList *ll)
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{
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for(; ll ;ll=ll->next)
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reexportdep(ll->n);
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}
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static void
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reexportdep(Node *n)
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{
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Type *t;
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if(!n)
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return;
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switch(n->op) {
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case ONAME:
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switch(n->class&~PHEAP) {
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case PFUNC:
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case PEXTERN:
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if (n->sym && n->sym->pkg != localpkg && n->sym->pkg != builtinpkg)
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exportlist = list(exportlist, n);
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}
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break;
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case OTYPE:
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case OLITERAL:
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if (n->sym && n->sym->pkg != localpkg && n->sym->pkg != builtinpkg)
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exportlist = list(exportlist, n);
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break;
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// for operations that need a type when rendered, put the type on the export list.
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case OCONV:
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case OCONVIFACE:
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case OCONVNOP:
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case ODOTTYPE:
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case OSTRUCTLIT:
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case OPTRLIT:
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t = n->type;
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if(!t->sym && t->type)
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t = t->type;
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if (t && t->sym && t->sym->def && t->sym->pkg != localpkg && t->sym->pkg != builtinpkg) {
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// print("reexport convnop %+hN\n", t->sym->def);
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exportlist = list(exportlist, t->sym->def);
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}
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break;
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}
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reexportdep(n->left);
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reexportdep(n->right);
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reexportdeplist(n->list);
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reexportdeplist(n->rlist);
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reexportdeplist(n->ninit);
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reexportdep(n->ntest);
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reexportdep(n->nincr);
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reexportdeplist(n->nbody);
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reexportdeplist(n->nelse);
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}
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static void
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dumpexportconst(Sym *s)
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{
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@ -123,9 +185,13 @@ dumpexportvar(Sym *s)
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t = n->type;
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dumpexporttype(t);
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if(t->etype == TFUNC && n->class == PFUNC)
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Bprint(bout, "\tfunc %#S%#hT\n", s, t);
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else
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if(t->etype == TFUNC && n->class == PFUNC) {
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if (n->inl) {
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Bprint(bout, "\tfunc %#S%#hT { %#H }\n", s, t, n->inl);
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reexportdeplist(n->inl);
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} else
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Bprint(bout, "\tfunc %#S%#hT\n", s, t);
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} else
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Bprint(bout, "\tvar %#S %#T\n", s, t);
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}
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@ -148,7 +214,6 @@ dumpexporttype(Type *t)
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if(t == T)
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return;
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if(t->printed || t == types[t->etype] || t == bytetype || t == runetype || t == errortype)
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return;
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t->printed = 1;
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@ -177,7 +242,11 @@ dumpexporttype(Type *t)
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Bprint(bout, "\ttype %#S %#lT\n", t->sym, t);
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for(i=0; i<n; i++) {
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f = m[i];
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Bprint(bout, "\tfunc (%#T) %#hhS%#hT\n", getthisx(f->type)->type, f->sym, f->type);
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if (f->type->nname && f->type->nname->inl) { // nname was set by caninl
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Bprint(bout, "\tfunc (%#T) %#hhS%#hT { %#H }\n", getthisx(f->type)->type, f->sym, f->type, f->type->nname->inl);
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reexportdeplist(f->type->nname->inl);
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} else
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Bprint(bout, "\tfunc (%#T) %#hhS%#hT\n", getthisx(f->type)->type, f->sym, f->type);
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}
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}
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@ -141,7 +141,7 @@ struct Type
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uchar local; // created in this file
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uchar deferwidth;
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uchar broke;
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uchar isddd; // TFIELD is ... argument
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uchar isddd; // TFIELD is ... argument
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uchar align;
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Node* nod; // canonical OTYPE node
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@ -260,6 +260,7 @@ struct Node
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NodeList* exit;
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NodeList* cvars; // closure params
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NodeList* dcl; // autodcl for this func/closure
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NodeList* inl; // copy of the body for use in inlining
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// OLITERAL/OREGISTER
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Val val;
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@ -280,6 +281,9 @@ struct Node
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Node* outer; // outer PPARAMREF in nested closure
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Node* closure; // ONAME/PHEAP <-> ONAME/PPARAMREF
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// ONAME substitute while inlining
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Node* inlvar;
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// OPACK
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Pkg* pkg;
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@ -473,6 +477,7 @@ enum
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// misc
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ODDD,
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ODDDARG,
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OINLCALL, // intermediary representation of an inlined call
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// for back ends
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OCMP, ODEC, OEXTEND, OINC, OREGISTER, OINDREG,
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@ -986,6 +991,12 @@ Node* temp(Type*);
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void fninit(NodeList *n);
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Sym* renameinit(void);
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/*
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* inl.c
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*/
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void caninl(Node *fn);
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void inlcalls(Node *fn);
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/*
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* lex.c
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*/
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@ -1295,6 +1295,12 @@ hidden_fndcl:
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checkwidth($$->type);
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addmethod($4, $$->type, 0);
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funchdr($$);
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// inl.c's inlnode in on a dotmeth node expects to find the inlineable body as
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// (dotmeth's type)->nname->inl, and dotmeth's type has been pulled
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// out by typecheck's lookdot as this $$->ttype. So by providing
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// this back link here we avoid special casing there.
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$$->type->nname = $$;
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}
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fntype:
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@ -1790,11 +1796,15 @@ hidden_import:
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if($2 == N)
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break;
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$2->inl = $3;
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funcbody($2);
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importlist = list(importlist, $2);
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if(debug['E']) {
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print("import [%Z] func %lN \n", $2->sym->pkg->path, $2);
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print("import [%Z] func %lN \n", importpkg->path, $2);
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if(debug['l'] > 2 && $2->inl)
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print("inl body:%+H\n", $2->inl);
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}
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}
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688
src/cmd/gc/inl.c
Normal file
688
src/cmd/gc/inl.c
Normal file
@ -0,0 +1,688 @@
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//
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// The inlining facility makes 2 passes: first caninl determines which
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// functions are suitable for inlining, and for those that are it
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// saves a copy of the body. Then inlcalls walks each function body to
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// expand calls to inlinable functions.
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//
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#include <u.h>
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#include <libc.h>
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#include "go.h"
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// Used by caninl.
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static Node* inlcopy(Node *n);
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static NodeList* inlcopylist(NodeList *ll);
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static int ishairy(Node *n);
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static int ishairylist(NodeList *ll);
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// Used by inlcalls
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static void inlnodelist(NodeList *l);
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static void inlnode(Node **np);
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static void mkinlcall(Node **np, Node *fn);
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static Node* inlvar(Node *n);
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static Node* retvar(Type *n, int i);
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static Node* newlabel(void);
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static Node* inlsubst(Node *n);
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static NodeList* inlsubstlist(NodeList *ll);
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// Used during inlsubst[list]
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static Node *inlfn; // function currently being inlined
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static Node *inlretlabel; // target of the goto substituted in place of a return
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static NodeList *inlretvars; // temp out variables
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// Caninl determines whether fn is inlineable. Currently that means:
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// fn is exactly 1 statement, either a return or an assignment, and
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// some temporary constraints marked TODO. If fn is inlineable, saves
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// fn->nbody in fn->inl and substitutes it with a copy.
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void
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caninl(Node *fn)
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{
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Node *savefn;
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Type *t;
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if(fn->op != ODCLFUNC)
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fatal("caninl %N", fn);
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if(!fn->nname)
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fatal("caninl no nname %+N", fn);
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// exactly 1 statement
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if(fn->nbody == nil || fn->nbody->next != nil)
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return;
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// the single statement should be a return or an assignment.
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switch(fn->nbody->n->op) {
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default:
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return;
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case ORETURN:
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case OAS:
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case OAS2:
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// case OEMPTY: // TODO
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break;
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}
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// can't handle ... args yet
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for(t=fn->type->type->down->down->type; t; t=t->down)
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if(t->isddd)
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return;
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// TODO Anything non-trivial
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if(ishairy(fn))
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return;
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savefn = curfn;
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curfn = fn;
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fn->nname->inl = fn->nbody;
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fn->nbody = inlcopylist(fn->nname->inl);
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// hack, TODO, check for better way to link method nodes back to the thing with the ->inl
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// this is so export can find the body of a method
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fn->type->nname = fn->nname;
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if(debug['l']>1)
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print("%L: can inline %#N as: %#T { %#H }\n", fn->lineno, fn->nname, fn->type, fn->nname->inl);
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curfn = savefn;
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}
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// Look for anything we want to punt on.
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static int
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ishairylist(NodeList *ll)
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{
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for(;ll;ll=ll->next)
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if(ishairy(ll->n))
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return 1;
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return 0;
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}
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static int
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ishairy(Node *n)
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{
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if(!n)
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return 0;
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switch(n->op) {
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case OPROC:
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case ODEFER:
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case OCALL:
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case OCALLFUNC:
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case OCALLINTER:
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case OCALLMETH:
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case OCLOSURE:
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return 1;
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}
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return ishairy(n->left) ||
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ishairy(n->right) ||
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ishairylist(n->list) ||
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ishairylist(n->rlist) ||
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ishairylist(n->ninit) ||
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ishairy(n->ntest) ||
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ishairy(n->nincr) ||
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ishairylist(n->nbody) ||
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ishairylist(n->nelse);
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}
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// Inlcopy and inlcopylist recursively copy the body of a function.
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// Any name-like node of non-local class is marked for re-export by adding it to
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// the exportlist.
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static NodeList*
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inlcopylist(NodeList *ll)
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{
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NodeList *l;
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l = nil;
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for(; ll; ll=ll->next)
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l = list(l, inlcopy(ll->n));
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return l;
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}
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static Node*
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inlcopy(Node *n)
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{
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Node *m;
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if(n == N)
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return N;
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switch(n->op) {
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case ONAME:
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case OTYPE:
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case OLITERAL:
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return n;
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}
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m = nod(OXXX, N, N);
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*m = *n;
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m->inl = nil;
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m->left = inlcopy(n->left);
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m->right = inlcopy(n->right);
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m->list = inlcopylist(n->list);
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m->rlist = inlcopylist(n->rlist);
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m->ninit = inlcopylist(n->ninit);
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m->ntest = inlcopy(n->ntest);
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m->nincr = inlcopy(n->nincr);
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m->nbody = inlcopylist(n->nbody);
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m->nelse = inlcopylist(n->nelse);
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return m;
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}
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// Inlcalls/nodelist/node walks fn's statements and expressions and substitutes any
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// calls made to inlineable functions. This is the external entry point.
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void
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inlcalls(Node *fn)
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{
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Node *savefn;
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savefn = curfn;
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curfn = fn;
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inlnode(&fn);
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if(fn != curfn)
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fatal("inlnode replaced curfn");
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curfn = savefn;
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}
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// Turn an OINLCALL into a statement.
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static void
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inlconv2stmt(Node *n)
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{
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n->op = OBLOCK;
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n->list = n->nbody;
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n->nbody = nil;
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n->rlist = nil;
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}
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// Turn an OINLCALL into a single valued expression.
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static void
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inlconv2expr(Node *n)
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{
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n->op = OCONVNOP;
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n->left = n->rlist->n;
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n->rlist = nil;
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n->ninit = concat(n->ninit, n->nbody);
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n->nbody = nil;
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}
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// Turn the OINLCALL in n->list into an expression list on n.
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// Used in return and call statements.
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static void
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inlgluelist(Node *n)
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{
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Node *c;
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c = n->list->n;
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n->ninit = concat(n->ninit, c->ninit);
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n->ninit = concat(n->ninit, c->nbody);
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n->list = c->rlist;
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}
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||||
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// Turn the OINLCALL in n->rlist->n into an expression list on n.
|
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// Used in OAS2FUNC.
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static void
|
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inlgluerlist(Node *n)
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{
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Node *c;
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|
||||
c = n->rlist->n;
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n->ninit = concat(n->ninit, c->ninit);
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n->ninit = concat(n->ninit, c->nbody);
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n->rlist = c->rlist;
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}
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static void
|
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inlnodelist(NodeList *l)
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{
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for(; l; l=l->next)
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inlnode(&l->n);
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}
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// inlnode recurses over the tree to find inlineable calls, which will
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// be turned into OINLCALLs by mkinlcall. When the recursion comes
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// back up will examine left, right, list, rlist, ninit, ntest, nincr,
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// nbody and nelse and use one of the 4 inlconv/glue functions above
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// to turn the OINLCALL into an expression, a statement, or patch it
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// in to this nodes list or rlist as appropriate.
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// NOTE it makes no sense to pass the glue functions down the recursion to the level where the OINLCALL gets created because they have to edit /this/ n,
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// so you'd have to push that one down as well, but then you may as well do it here. so this is cleaner and shorter and less complicated.
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static void
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inlnode(Node **np)
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{
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Node *n;
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NodeList *l;
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if(*np == nil)
|
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return;
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n = *np;
|
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|
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switch(n->op) {
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case ODEFER:
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case OPROC:
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// inhibit inlining of their argument
|
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switch(n->left->op) {
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case OCALLFUNC:
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case OCALLMETH:
|
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n->left->etype = n->op;
|
||||
}
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||||
case OCLOSURE:
|
||||
// TODO. do them here rather than in lex.c phase 6b
|
||||
return;
|
||||
}
|
||||
|
||||
inlnodelist(n->ninit);
|
||||
for(l=n->ninit; l; l=l->next)
|
||||
if(l->n->op == OINLCALL)
|
||||
inlconv2stmt(l->n);
|
||||
|
||||
inlnode(&n->left);
|
||||
if(n->left && n->left->op == OINLCALL)
|
||||
inlconv2expr(n->left);
|
||||
|
||||
inlnode(&n->right);
|
||||
if(n->right && n->right->op == OINLCALL)
|
||||
inlconv2expr(n->right);
|
||||
|
||||
inlnodelist(n->list);
|
||||
switch(n->op) {
|
||||
case OBLOCK:
|
||||
for(l=n->list; l; l=l->next)
|
||||
if(l->n->op == OINLCALL)
|
||||
inlconv2stmt(l->n);
|
||||
break;
|
||||
|
||||
case ORETURN:
|
||||
if(count(n->list) == 1 && curfn->type->outtuple > 1 && n->list->n->op == OINLCALL) {
|
||||
inlgluelist(n);
|
||||
break;
|
||||
}
|
||||
|
||||
goto list_dflt;
|
||||
|
||||
case OCALLMETH:
|
||||
case OCALLINTER:
|
||||
case OCALLFUNC:
|
||||
// if we just replaced arg in f(arg()) with an inlined call
|
||||
// and arg returns multiple values, glue as list
|
||||
if(count(n->list) == 1 && n->list->n->op == OINLCALL && count(n->list->n->rlist) > 1) {
|
||||
inlgluelist(n);
|
||||
break;
|
||||
}
|
||||
|
||||
// fallthrough
|
||||
default:
|
||||
list_dflt:
|
||||
for(l=n->list; l; l=l->next)
|
||||
if(l->n->op == OINLCALL)
|
||||
inlconv2expr(l->n);
|
||||
}
|
||||
|
||||
inlnodelist(n->rlist);
|
||||
switch(n->op) {
|
||||
case OAS2FUNC:
|
||||
if(n->rlist->n->op == OINLCALL) {
|
||||
inlgluerlist(n);
|
||||
n->op = OAS2;
|
||||
n->typecheck = 0;
|
||||
typecheck(np, Etop);
|
||||
break;
|
||||
}
|
||||
|
||||
// fallthrough
|
||||
default:
|
||||
for(l=n->rlist; l; l=l->next)
|
||||
if(l->n->op == OINLCALL)
|
||||
inlconv2expr(l->n);
|
||||
|
||||
}
|
||||
|
||||
inlnode(&n->ntest);
|
||||
if(n->ntest && n->ntest->op == OINLCALL)
|
||||
inlconv2expr(n->ntest);
|
||||
|
||||
inlnode(&n->nincr);
|
||||
if(n->nincr && n->nincr->op == OINLCALL)
|
||||
inlconv2stmt(n->nincr);
|
||||
|
||||
inlnodelist(n->nbody);
|
||||
for(l=n->nbody; l; l=l->next)
|
||||
if(l->n->op == OINLCALL)
|
||||
inlconv2stmt(l->n);
|
||||
|
||||
inlnodelist(n->nelse);
|
||||
for(l=n->nelse; l; l=l->next)
|
||||
if(l->n->op == OINLCALL)
|
||||
inlconv2stmt(l->n);
|
||||
|
||||
// with all the branches out of the way, it is now time to
|
||||
// transmogrify this node itself unless inhibited by the
|
||||
// switch at the top of this function.
|
||||
switch(n->op) {
|
||||
case OCALLFUNC:
|
||||
case OCALLMETH:
|
||||
if (n->etype == OPROC || n->etype == ODEFER)
|
||||
return;
|
||||
}
|
||||
|
||||
switch(n->op) {
|
||||
case OCALLFUNC:
|
||||
if(debug['l']>3)
|
||||
print("%L:call to func %lN\n", n->lineno, n->left);
|
||||
mkinlcall(np, n->left);
|
||||
break;
|
||||
|
||||
case OCALLMETH:
|
||||
if(debug['l']>3)
|
||||
print("%L:call to meth %lN\n", n->lineno, n->left->right);
|
||||
// typecheck resolved ODOTMETH->type, whose nname points to the actual function.
|
||||
if(n->left->type->nname)
|
||||
mkinlcall(np, n->left->type->nname);
|
||||
else
|
||||
fatal("no function definition for [%p] %+T\n", n->left->type, n->left->type);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// if *np is a call, and fn is a function with an inlinable body, substitute *np with an OINLCALL.
|
||||
// On return ninit has the parameter assignments, the nbody is the
|
||||
// inlined function body and list, rlist contain the input, output
|
||||
// parameters.
|
||||
static void
|
||||
mkinlcall(Node **np, Node *fn)
|
||||
{
|
||||
int i;
|
||||
Node *n, *call, *saveinlfn, *as;
|
||||
NodeList *dcl, *ll, *ninit, *body;
|
||||
Type *t;
|
||||
|
||||
if (fn->inl == nil)
|
||||
return;
|
||||
|
||||
n = *np;
|
||||
|
||||
// Bingo, we have a function node, and it has an inlineable body
|
||||
if(debug['l']>1)
|
||||
print("%L: inlining call to %S %#T { %#H }\n", n->lineno, fn->sym, fn->type, fn->inl);
|
||||
|
||||
if(debug['l']>2)
|
||||
print("%L: Before inlining: %+N\n", n->lineno, n);
|
||||
|
||||
saveinlfn = inlfn;
|
||||
inlfn = fn;
|
||||
|
||||
ninit = n->ninit;
|
||||
|
||||
if (fn->defn) // local function
|
||||
dcl = fn->defn->dcl;
|
||||
else // imported function
|
||||
dcl = fn->dcl;
|
||||
|
||||
// Make temp names to use instead of the originals for anything but the outparams
|
||||
for(ll = dcl; ll; ll=ll->next)
|
||||
if(ll->n->op == ONAME && ll->n->class != PPARAMOUT) {
|
||||
ll->n->inlvar = inlvar(ll->n);
|
||||
ninit = list(ninit, nod(ODCL, ll->n->inlvar, N)); // otherwise gen won't emit the allocations for heapallocs
|
||||
}
|
||||
|
||||
// assign arguments to the parameters' temp names
|
||||
if(fn->type->thistuple) {
|
||||
if (!n->left->op == ODOTMETH || !n->left->left)
|
||||
fatal("method call without receiver: %+N", n);
|
||||
t = getthisx(fn->type)->type;
|
||||
if(t != T && t->nname) {
|
||||
if(!t->nname->inlvar)
|
||||
fatal("missing inlvar for %N\n", t->nname);
|
||||
as = nod(OAS, t->nname->inlvar, n->left->left);
|
||||
typecheck(&as, Etop);
|
||||
ninit = list(ninit, as);
|
||||
} // else if !ONAME add to init anyway?
|
||||
}
|
||||
|
||||
as = nod(OAS2, N, N);
|
||||
if(fn->type->intuple > 1 && n->list && !n->list->next) {
|
||||
// TODO check that n->list->n is a call?
|
||||
as->rlist = n->list;
|
||||
for(t = getinargx(fn->type)->type; t; t=t->down) {
|
||||
if(t->nname) {
|
||||
if(!t->nname->inlvar)
|
||||
fatal("missing inlvar for %N\n", t->nname);
|
||||
as->list = list(as->list, t->nname->inlvar);
|
||||
} else {
|
||||
as->list = list(as->list, temp(t->type));
|
||||
}
|
||||
}
|
||||
} else {
|
||||
ll = n->list;
|
||||
for(t = getinargx(fn->type)->type; t && ll; t=t->down) {
|
||||
if(t->nname) {
|
||||
if(!t->nname->inlvar)
|
||||
fatal("missing inlvar for %N\n", t->nname);
|
||||
as->list = list(as->list, t->nname->inlvar);
|
||||
as->rlist = list(as->rlist, ll->n);
|
||||
}
|
||||
ll=ll->next;
|
||||
}
|
||||
if(ll || t)
|
||||
fatal("arg count mismatch: %#T vs %,H\n", getinargx(fn->type), n->list);
|
||||
}
|
||||
|
||||
if (as->rlist) {
|
||||
typecheck(&as, Etop);
|
||||
ninit = list(ninit, as);
|
||||
}
|
||||
|
||||
// make the outparams. No need to declare because currently they'll only be used in the assignment that replaces returns.
|
||||
inlretvars = nil;
|
||||
i = 0;
|
||||
for(t = getoutargx(fn->type)->type; t; t = t->down)
|
||||
inlretvars = list(inlretvars, retvar(t, i++));
|
||||
|
||||
inlretlabel = newlabel();
|
||||
body = inlsubstlist(fn->inl);
|
||||
|
||||
body = list(body, nod(OGOTO, inlretlabel, N)); // avoid 'not used' when function doesnt have return
|
||||
body = list(body, nod(OLABEL, inlretlabel, N));
|
||||
|
||||
typechecklist(body, Etop);
|
||||
|
||||
call = nod(OINLCALL, N, N);
|
||||
call->ninit = ninit;
|
||||
call->nbody = body;
|
||||
call->rlist = inlretvars;
|
||||
call->type = n->type;
|
||||
call->lineno = n->lineno;
|
||||
call->typecheck = 1;
|
||||
|
||||
*np = call;
|
||||
|
||||
inlfn = saveinlfn;
|
||||
if(debug['l']>2)
|
||||
print("%L: After inlining %+N\n\n", n->lineno, *np);
|
||||
|
||||
}
|
||||
|
||||
// Every time we expand a function we generate a new set of tmpnames,
|
||||
// PAUTO's in the calling functions, and link them off of the
|
||||
// PPARAM's, PAUTOS and PPARAMOUTs of the called function.
|
||||
static Node*
|
||||
inlvar(Node *var)
|
||||
{
|
||||
Node *n;
|
||||
|
||||
if(debug['l']>3)
|
||||
print("inlvar %+N\n", var);
|
||||
|
||||
n = newname(var->sym);
|
||||
n->type = var->type;
|
||||
n->class = PAUTO;
|
||||
n->used = 1;
|
||||
n->curfn = curfn; // the calling function, not the called one
|
||||
curfn->dcl = list(curfn->dcl, n);
|
||||
return n;
|
||||
}
|
||||
|
||||
// Make a new pparamref
|
||||
static Node*
|
||||
inlref(Node *var)
|
||||
{
|
||||
Node *n;
|
||||
|
||||
if (!var->closure)
|
||||
fatal("No ->closure: %N", var);
|
||||
|
||||
if (!var->closure->inlvar)
|
||||
fatal("No ->closure->inlref: %N", var);
|
||||
|
||||
n = nod(OXXX, N, N);
|
||||
*n = *var;
|
||||
|
||||
// if(debug['l']>1)
|
||||
// print("inlref: %N -> %N\n", var, var->closure->inlvar);
|
||||
|
||||
var = var->closure->inlvar;
|
||||
|
||||
return n;
|
||||
}
|
||||
|
||||
// Synthesize a variable to store the inlined function's results in.
|
||||
static Node*
|
||||
retvar(Type *t, int i)
|
||||
{
|
||||
Node *n;
|
||||
|
||||
snprint(namebuf, sizeof(namebuf), ".r%d", i);
|
||||
n = newname(lookup(namebuf));
|
||||
n->type = t->type;
|
||||
n->class = PAUTO;
|
||||
n->used = 1;
|
||||
n->curfn = curfn; // the calling function, not the called one
|
||||
curfn->dcl = list(curfn->dcl, n);
|
||||
return n;
|
||||
}
|
||||
|
||||
static Node*
|
||||
newlabel(void)
|
||||
{
|
||||
Node *n;
|
||||
static int label;
|
||||
|
||||
label++;
|
||||
snprint(namebuf, sizeof(namebuf), ".inlret%.6d", label);
|
||||
n = newname(lookup(namebuf));
|
||||
n->etype = 1; // flag 'safe' for escape analysis (no backjumps)
|
||||
return n;
|
||||
}
|
||||
|
||||
// inlsubst and inlsubstlist recursively copy the body of the saved
|
||||
// pristine ->inl body of the function while substituting references
|
||||
// to input/output parameters with ones to the tmpnames, and
|
||||
// substituting returns with assignments to the output.
|
||||
static NodeList*
|
||||
inlsubstlist(NodeList *ll)
|
||||
{
|
||||
NodeList *l;
|
||||
|
||||
l = nil;
|
||||
for(; ll; ll=ll->next)
|
||||
l = list(l, inlsubst(ll->n));
|
||||
return l;
|
||||
}
|
||||
|
||||
static int closuredepth;
|
||||
|
||||
static Node*
|
||||
inlsubst(Node *n)
|
||||
{
|
||||
Node *m, *as;
|
||||
NodeList *ll;
|
||||
|
||||
if(n == N)
|
||||
return N;
|
||||
|
||||
switch(n->op) {
|
||||
case ONAME:
|
||||
if(n->inlvar) { // These will be set during inlnode
|
||||
if (debug['l']>2)
|
||||
print ("substituting name %N -> %N\n", n, n->inlvar);
|
||||
return n->inlvar;
|
||||
}
|
||||
if (debug['l']>2)
|
||||
print ("not substituting name %N\n", n);
|
||||
return n;
|
||||
|
||||
case OLITERAL:
|
||||
case OTYPE:
|
||||
return n;
|
||||
|
||||
case ORETURN:
|
||||
// only rewrite returns belonging to this function, not nested ones.
|
||||
if (closuredepth > 0)
|
||||
break;
|
||||
|
||||
// dump("Return before substitution", n);
|
||||
m = nod(OGOTO, inlretlabel, N);
|
||||
m->ninit = inlsubstlist(n->ninit);
|
||||
|
||||
// rewrite naked return for function with return values to return PPARAMOUTs
|
||||
if(count(n->list) == 0 && inlfn->type->outtuple > 0) {
|
||||
for(ll = inlfn->dcl; ll; ll=ll->next)
|
||||
if(ll->n->op == ONAME && ll->n->class == PPARAMOUT)
|
||||
n->list = list(n->list, ll->n);
|
||||
|
||||
// dump("Return naked -> dressed ", n);
|
||||
}
|
||||
|
||||
if(inlretvars && n->list) {
|
||||
as = nod(OAS2, N, N);
|
||||
as->list = inlretvars;
|
||||
as->rlist = inlsubstlist(n->list);
|
||||
typecheck(&as, Etop);
|
||||
m->ninit = list(m->ninit, as);
|
||||
}
|
||||
|
||||
typechecklist(m->ninit, Etop);
|
||||
typecheck(&m, Etop);
|
||||
// dump("Return after substitution", m);
|
||||
return m;
|
||||
}
|
||||
|
||||
|
||||
m = nod(OXXX, N, N);
|
||||
*m = *n;
|
||||
m->ninit = nil;
|
||||
|
||||
if(n->op == OCLOSURE) {
|
||||
closuredepth++;
|
||||
|
||||
for(ll = m->dcl; ll; ll=ll->next)
|
||||
if(ll->n->op == ONAME) {
|
||||
ll->n->inlvar = inlvar(ll->n);
|
||||
m->ninit = list(m->ninit, nod(ODCL, ll->n->inlvar, N)); // otherwise gen won't emit the allocations for heapallocs
|
||||
}
|
||||
|
||||
for (ll=m->cvars; ll; ll=ll->next)
|
||||
if (ll->n->op == ONAME)
|
||||
ll->n->cvars = list(ll->n->cvars, inlref(ll->n));
|
||||
}
|
||||
|
||||
m->left = inlsubst(n->left);
|
||||
m->right = inlsubst(n->right);
|
||||
m->list = inlsubstlist(n->list);
|
||||
m->rlist = inlsubstlist(n->rlist);
|
||||
m->ninit = concat(m->ninit, inlsubstlist(n->ninit));
|
||||
m->ntest = inlsubst(n->ntest);
|
||||
m->nincr = inlsubst(n->nincr);
|
||||
m->nbody = inlsubstlist(n->nbody);
|
||||
m->nelse = inlsubstlist(n->nelse);
|
||||
|
||||
if(n->op == OCLOSURE)
|
||||
closuredepth--;
|
||||
|
||||
return m;
|
||||
}
|
||||
@ -336,11 +336,43 @@ main(int argc, char *argv[])
|
||||
if(nsavederrors+nerrors)
|
||||
errorexit();
|
||||
|
||||
// Phase 4: escape analysis.
|
||||
// Phase 4: Inlining
|
||||
if (debug['l']) { // TODO only if debug['l'] > 1, otherwise lazily when used.
|
||||
// Typecheck imported function bodies
|
||||
for(l=importlist; l; l=l->next) {
|
||||
if (l->n->inl == nil)
|
||||
continue;
|
||||
curfn = l->n;
|
||||
saveerrors();
|
||||
importpkg = l->n->sym->pkg;
|
||||
if (debug['l']>2)
|
||||
print("typecheck import [%S] %lN { %#H }\n", l->n->sym, l->n, l->n->inl);
|
||||
typechecklist(l->n->inl, Etop);
|
||||
importpkg = nil;
|
||||
}
|
||||
curfn = nil;
|
||||
|
||||
if(nsavederrors+nerrors)
|
||||
errorexit();
|
||||
}
|
||||
|
||||
if (debug['l']) {
|
||||
// Find functions that can be inlined and clone them before walk expands them.
|
||||
for(l=xtop; l; l=l->next)
|
||||
if(l->n->op == ODCLFUNC)
|
||||
caninl(l->n);
|
||||
|
||||
// Expand inlineable calls in all functions
|
||||
for(l=xtop; l; l=l->next)
|
||||
if(l->n->op == ODCLFUNC)
|
||||
inlcalls(l->n);
|
||||
}
|
||||
|
||||
// Phase 5: escape analysis.
|
||||
if(!debug['N'])
|
||||
escapes();
|
||||
|
||||
// Phase 5: Compile top level functions.
|
||||
// Phase 6: Compile top level functions.
|
||||
for(l=xtop; l; l=l->next)
|
||||
if(l->n->op == ODCLFUNC)
|
||||
funccompile(l->n, 0);
|
||||
@ -348,7 +380,7 @@ main(int argc, char *argv[])
|
||||
if(nsavederrors+nerrors == 0)
|
||||
fninit(xtop);
|
||||
|
||||
// Phase 5b: Compile all closures.
|
||||
// Phase 6b: Compile all closures.
|
||||
while(closures) {
|
||||
l = closures;
|
||||
closures = nil;
|
||||
@ -356,7 +388,7 @@ main(int argc, char *argv[])
|
||||
funccompile(l->n, 1);
|
||||
}
|
||||
|
||||
// Phase 6: check external declarations.
|
||||
// Phase 7: check external declarations.
|
||||
for(l=externdcl; l; l=l->next)
|
||||
if(l->n->op == ONAME)
|
||||
typecheck(&l->n, Erv);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user