--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gen/statements.c	Wed Oct 03 02:15:12 2007 +0200
@@ -0,0 +1,593 @@
+// Statements: D -> LLVM glue
+
+#include <stdio.h>
+#include <math.h>
+#include <sstream>
+#include <fstream>
+#include <iostream>
+
+#include "llvm/Type.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Constants.h"
+#include "llvm/Instructions.h"
+#include "llvm/IntrinsicInst.h"
+#include "llvm/CallingConv.h"
+
+#include "total.h"
+#include "init.h"
+#include "symbol.h"
+#include "mtype.h"
+#include "hdrgen.h"
+#include "port.h"
+
+#include "gen/irstate.h"
+#include "gen/elem.h"
+#include "gen/logger.h"
+#include "gen/tollvm.h"
+#include "gen/runtime.h"
+#include "gen/arrays.h"
+
+/* --------------------------------------------------------------------------------------- */
+
+void CompoundStatement::toIR(IRState* p)
+{
+    static int csi = 0;
+    Logger::println("CompoundStatement::toIR(%d):\n<<<\n%s>>>", csi++, toChars());
+    LOG_SCOPE;
+
+    /*
+    const char* labelname;
+    bool insterm = false;
+
+    if (!p->scopes()) {
+        labelname = "bb";
+        insterm = true;
+    }
+    else
+        labelname = "entry";
+
+    //if (!llvm::isa<llvm::TerminatorInst>(p->topfunc()->back().back()))
+    //    insterm = true;
+
+    llvm::BasicBlock* bb = new llvm::BasicBlock(labelname, p->topfunc());
+
+    if (insterm) {
+        new llvm::BranchInst(bb,p->topbb());
+    }
+
+    p->bbs.push(bb);
+    */
+
+    size_t n = statements->dim;
+    for (size_t i=0; i<n; i++)
+    {
+        Statement* s = (Statement*)statements->data[i];
+        if (s)
+        s->toIR(p);
+        else
+        Logger::println("NULL statement found in CompoundStatement !! :S");
+    }
+
+    //p->bbs.pop();
+}
+
+void ReturnStatement::toIR(IRState* p)
+{
+    static int rsi = 0;
+    Logger::println("ReturnStatement::toIR(%d): %s", rsi++, toChars());
+    LOG_SCOPE;
+
+    if (exp)
+    {
+        TY expty = exp->type->ty;
+        if (p->topfunc()->getReturnType() == llvm::Type::VoidTy) {
+            assert(expty == Tstruct || expty == Tdelegate || expty == Tarray);
+
+            TypeFunction* f = p->topfunctype();
+            assert(f->llvmRetInPtr && f->llvmRetArg);
+
+            p->lvals.push_back(f->llvmRetArg);
+            elem* e = exp->toElem(p);
+            p->lvals.pop_back();
+
+            // structliterals do this themselves
+            // also they dont produce any value
+            if (expty == Tstruct) {
+                if (!e->inplace) {
+                    TypeStruct* ts = (TypeStruct*)exp->type;
+                    assert(e->mem);
+                    LLVM_DtoStructCopy(ts,f->llvmRetArg,e->mem);
+                }
+            }
+            else if (expty == Tdelegate) {
+                // do nothing, handled by the DelegateExp
+                LLVM_DtoDelegateCopy(f->llvmRetArg,e->mem);
+            }
+            else if (expty == Tarray) {
+                if (e->type == elem::SLICE) {
+                    LLVM_DtoSetArray(f->llvmRetArg,e->arg,e->mem);
+                }
+                // else the return value is a variable and should already have been assigned by now
+            }
+            else
+            assert(0);
+
+            new llvm::ReturnInst(p->scopebb());
+            delete e;
+        }
+        else {
+            elem* e = exp->toElem(p);
+            llvm::Value* v = e->getValue();
+            Logger::cout() << *v << '\n';
+            new llvm::ReturnInst(v, p->scopebb());
+            delete e;
+        }
+    }
+    else
+    {
+        if (p->topfunc()->getReturnType() == llvm::Type::VoidTy)
+            new llvm::ReturnInst(p->scopebb());
+        else
+            new llvm::UnreachableInst(p->scopebb());
+    }
+
+    p->scope().returned = true;
+}
+
+void ExpStatement::toIR(IRState* p)
+{
+    static int esi = 0;
+    Logger::println("ExpStatement::toIR(%d): %s", esi++, toChars());
+    LOG_SCOPE;
+
+    if (exp != 0) {
+        elem* e = exp->toElem(p);
+        delete e;
+    }
+    /*elem* e = exp->toElem(p);
+    p->buf.printf("%s", e->toChars());
+    delete e;
+    p->buf.writenl();*/
+}
+
+void IfStatement::toIR(IRState* p)
+{
+    static int wsi = 0;
+    Logger::println("IfStatement::toIR(%d): %s", wsi++, toChars());
+    LOG_SCOPE;
+
+    elem* cond_e = condition->toElem(p);
+    llvm::Value* cond_val = cond_e->getValue();
+    delete cond_e;
+
+    llvm::BasicBlock* oldend = gIR->scopeend();
+
+    llvm::BasicBlock* ifbb = new llvm::BasicBlock("if", gIR->topfunc(), oldend);
+    llvm::BasicBlock* endbb = new llvm::BasicBlock("endif", gIR->topfunc(), oldend);
+    llvm::BasicBlock* elsebb = 0;
+    if (elsebody) {
+        elsebb = new llvm::BasicBlock("else", gIR->topfunc(), endbb);
+    }
+    else {
+        elsebb = endbb;
+    }
+
+    if (cond_val->getType() != llvm::Type::Int1Ty) {
+        Logger::cout() << "if conditional: " << *cond_val << '\n';
+        cond_val = LLVM_DtoBoolean(cond_val);
+    }
+    llvm::Value* ifgoback = new llvm::BranchInst(ifbb, elsebb, cond_val, gIR->scopebegin());
+
+    // replace current scope
+    gIR->scope() = IRScope(ifbb,elsebb);
+
+    bool endifUsed = false;
+
+    // do scoped statements
+    ifbody->toIR(p);
+    if (!gIR->scopereturned()) {
+        new llvm::BranchInst(endbb,gIR->scopebegin());
+        endifUsed = true;
+    }
+
+    if (elsebody) {
+        //assert(0);
+        gIR->scope() = IRScope(elsebb,endbb);
+        elsebody->toIR(p);
+        if (!gIR->scopereturned()) {
+            new llvm::BranchInst(endbb,gIR->scopebegin());
+            endifUsed = true;
+        }
+    }
+
+    // rewrite the scope
+    gIR->scope() = IRScope(endbb,oldend);
+}
+
+void ScopeStatement::toIR(IRState* p)
+{
+    Logger::println("ScopeStatement::toIR(): %s", toChars());
+    LOG_SCOPE;
+
+    llvm::BasicBlock* oldend = p->scopeend();
+
+    IRScope irs;
+    // remove useless branches by clearing and reusing the current basicblock
+    llvm::BasicBlock* bb = p->scopebegin();
+    if (bb->empty()) {
+        irs.begin = bb;
+    }
+    else {
+        irs.begin = new llvm::BasicBlock("scope", p->topfunc(), oldend);
+        new llvm::BranchInst(irs.begin, p->scopebegin());
+    }
+    irs.end = new llvm::BasicBlock("endscope", p->topfunc(), oldend);
+
+    gIR->scope() = irs;
+
+    statement->toIR(p);
+
+    p->scope() = IRScope(p->scopebb(),oldend);
+    irs.end->eraseFromParent();
+
+    /*
+    if (!gIR->scopereturned()) {
+        new llvm::BranchInst(irs.end, gIR->scopebegin());
+    }
+
+    // rewrite the scope
+    gIR->scope() = IRScope(irs.end,oldend);
+    */
+}
+
+void WhileStatement::toIR(IRState* p)
+{
+    static int wsi = 0;
+    Logger::println("WhileStatement::toIR(%d): %s", wsi++, toChars());
+    LOG_SCOPE;
+
+    // create while blocks
+    llvm::BasicBlock* oldend = gIR->scopeend();
+    llvm::BasicBlock* whilebb = new llvm::BasicBlock("whilecond", gIR->topfunc(), oldend);
+    llvm::BasicBlock* endbb = new llvm::BasicBlock("endwhile", gIR->topfunc(), oldend);
+
+    // move into the while block
+    new llvm::BranchInst(whilebb, gIR->scopebegin());
+
+    // replace current scope
+    gIR->scope() = IRScope(whilebb,endbb);
+
+    // create the condition
+    elem* cond_e = condition->toElem(p);
+    llvm::Value* cond_val = LLVM_DtoBoolean(cond_e->getValue());
+    delete cond_e;
+
+    // while body block
+    llvm::BasicBlock* whilebodybb = new llvm::BasicBlock("whilebody", gIR->topfunc(), endbb);
+
+    // conditional branch
+    llvm::Value* ifbreak = new llvm::BranchInst(whilebodybb, endbb, cond_val, whilebb);
+
+    // rewrite scope
+    gIR->scope() = IRScope(whilebodybb,endbb);
+
+    // do while body code
+    body->toIR(p);
+
+    // loop
+    new llvm::BranchInst(whilebb, gIR->scopebegin());
+
+    // rewrite the scope
+    gIR->scope() = IRScope(endbb,oldend);
+}
+
+void DoStatement::toIR(IRState* p)
+{
+    static int wsi = 0;
+    Logger::println("DoStatement::toIR(%d): %s", wsi++, toChars());
+    LOG_SCOPE;
+
+    // create while blocks
+    llvm::BasicBlock* oldend = gIR->scopeend();
+    llvm::BasicBlock* dowhilebb = new llvm::BasicBlock("dowhile", gIR->topfunc(), oldend);
+    llvm::BasicBlock* endbb = new llvm::BasicBlock("enddowhile", gIR->topfunc(), oldend);
+
+    // move into the while block
+    new llvm::BranchInst(dowhilebb, gIR->scopebegin());
+
+    // replace current scope
+    gIR->scope() = IRScope(dowhilebb,endbb);
+
+    // do do-while body code
+    body->toIR(p);
+
+    // create the condition
+    elem* cond_e = condition->toElem(p);
+    llvm::Value* cond_val = LLVM_DtoBoolean(cond_e->getValue());
+    delete cond_e;
+
+    // conditional branch
+    llvm::Value* ifbreak = new llvm::BranchInst(dowhilebb, endbb, cond_val, gIR->scopebegin());
+
+    // rewrite the scope
+    gIR->scope() = IRScope(endbb,oldend);
+}
+
+void ForStatement::toIR(IRState* p)
+{
+    static int wsi = 0;
+    Logger::println("ForStatement::toIR(%d): %s", wsi++, toChars());
+    LOG_SCOPE;
+
+    // create for blocks
+    llvm::BasicBlock* oldend = gIR->scopeend();
+    llvm::BasicBlock* forbb = new llvm::BasicBlock("forcond", gIR->topfunc(), oldend);
+    llvm::BasicBlock* forbodybb = new llvm::BasicBlock("forbody", gIR->topfunc(), oldend);
+    llvm::BasicBlock* forincbb = new llvm::BasicBlock("forinc", gIR->topfunc(), oldend);
+    llvm::BasicBlock* endbb = new llvm::BasicBlock("endfor", gIR->topfunc(), oldend);
+
+    // init
+    if (init != 0)
+    init->toIR(p);
+
+    // move into the for condition block, ie. start the loop
+    new llvm::BranchInst(forbb, gIR->scopebegin());
+
+    IRScope loop;
+    loop.begin = forincbb;
+    loop.end = endbb;
+    p->loopbbs.push_back(loop);
+
+    // replace current scope
+    gIR->scope() = IRScope(forbb,forbodybb);
+
+    // create the condition
+    elem* cond_e = condition->toElem(p);
+    llvm::Value* cond_val = LLVM_DtoBoolean(cond_e->getValue());
+    delete cond_e;
+
+    // conditional branch
+    llvm::Value* ifbreak = new llvm::BranchInst(forbodybb, endbb, cond_val, forbb);
+
+    // rewrite scope
+    gIR->scope() = IRScope(forbodybb,forincbb);
+
+    // do for body code
+    body->toIR(p);
+
+    // move into the for increment block
+    new llvm::BranchInst(forincbb, gIR->scopebegin());
+    gIR->scope() = IRScope(forincbb, endbb);
+
+    // increment
+    if (increment) {
+        elem* inc = increment->toElem(p);
+        delete inc;
+    }
+
+    // loop
+    new llvm::BranchInst(forbb, gIR->scopebegin());
+
+    p->loopbbs.pop_back();
+
+    // rewrite the scope
+    gIR->scope() = IRScope(endbb,oldend);
+}
+
+void BreakStatement::toIR(IRState* p)
+{
+    static int wsi = 0;
+    Logger::println("BreakStatement::toIR(%d): %s", wsi++, toChars());
+    LOG_SCOPE;
+
+    if (ident != 0) {
+        Logger::println("ident = %s", ident->toChars());
+        assert(0);
+    }
+    else {
+        new llvm::BranchInst(gIR->loopbbs.back().end, gIR->scopebegin());
+    }
+}
+
+void ContinueStatement::toIR(IRState* p)
+{
+    static int wsi = 0;
+    Logger::println("ContinueStatement::toIR(%d): %s", wsi++, toChars());
+    LOG_SCOPE;
+
+    if (ident != 0) {
+        Logger::println("ident = %s", ident->toChars());
+        assert(0);
+    }
+    else {
+        new llvm::BranchInst(gIR->loopbbs.back().begin, gIR->scopebegin());
+    }
+}
+
+void OnScopeStatement::toIR(IRState* p)
+{
+    static int wsi = 0;
+    Logger::println("OnScopeStatement::toIR(%d): %s", wsi++, toChars());
+    LOG_SCOPE;
+
+    assert(statement);
+    //statement->toIR(p); // this seems to be redundant
+}
+
+void TryFinallyStatement::toIR(IRState* p)
+{
+    static int wsi = 0;
+    Logger::println("TryFinallyStatement::toIR(%d): %s", wsi++, toChars());
+    LOG_SCOPE;
+
+    llvm::BasicBlock* oldend = gIR->scopeend();
+
+    llvm::BasicBlock* trybb = new llvm::BasicBlock("try", gIR->topfunc(), oldend);
+    llvm::BasicBlock* finallybb = new llvm::BasicBlock("finally", gIR->topfunc(), oldend);
+    llvm::BasicBlock* endbb = new llvm::BasicBlock("endtryfinally", gIR->topfunc(), oldend);
+
+    // pass the previous BB into this
+    new llvm::BranchInst(trybb, gIR->scopebegin());
+
+    gIR->scope() = IRScope(trybb,finallybb);
+
+    assert(body);
+    body->toIR(p);
+    new llvm::BranchInst(finallybb, gIR->scopebegin());
+
+    // rewrite the scope
+    gIR->scope() = IRScope(finallybb,endbb);
+
+    assert(finalbody);
+    finalbody->toIR(p);
+    new llvm::BranchInst(endbb, gIR->scopebegin());
+
+    // rewrite the scope
+    gIR->scope() = IRScope(endbb,oldend);
+}
+
+void TryCatchStatement::toIR(IRState* p)
+{
+    static int wsi = 0;
+    Logger::println("TryCatchStatement::toIR(%d): %s", wsi++, toChars());
+    LOG_SCOPE;
+
+    assert(0 && "try-catch is not properly");
+
+    assert(body);
+    body->toIR(p);
+
+    assert(catches);
+    for(size_t i=0; i<catches->dim; ++i)
+    {
+        Catch* c = (Catch*)catches->data[i];
+        c->handler->toIR(p);
+    }
+}
+
+void ThrowStatement::toIR(IRState* p)
+{
+    static int wsi = 0;
+    Logger::println("ThrowStatement::toIR(%d): %s", wsi++, toChars());
+    LOG_SCOPE;
+
+    assert(0 && "throw is not implemented");
+
+    assert(exp);
+    elem* e = exp->toElem(p);
+    delete e;
+}
+
+void SwitchStatement::toIR(IRState* p)
+{
+    Logger::println("SwitchStatement::toIR(): %s", toChars());
+    LOG_SCOPE;
+
+    llvm::BasicBlock* oldend = gIR->scopeend();
+
+    // collect the needed cases
+    typedef std::pair<llvm::BasicBlock*, llvm::ConstantInt*> CasePair;
+    std::vector<CasePair> vcases;
+    for (int i=0; i<cases->dim; ++i)
+    {
+        CaseStatement* cs = (CaseStatement*)cases->data[i];
+
+        // get the case value
+        elem* e = cs->exp->toElem(p);
+        assert(e->val && llvm::isa<llvm::ConstantInt>(e->val));
+        llvm::ConstantInt* ec = llvm::cast<llvm::ConstantInt>(e->val);
+        delete e;
+
+        // create the case bb with a nice label
+        std::string lblname("case"+std::string(cs->exp->toChars()));
+        llvm::BasicBlock* bb = new llvm::BasicBlock(lblname, p->topfunc(), oldend);
+
+        vcases.push_back(CasePair(bb,ec));
+    }
+
+    // default
+    llvm::BasicBlock* defbb = 0;
+    if (!hasNoDefault) {
+        defbb = new llvm::BasicBlock("default", p->topfunc(), oldend);
+    }
+
+    // end (break point)
+    llvm::BasicBlock* endbb = new llvm::BasicBlock("switchend", p->topfunc(), oldend);
+
+    // condition var
+    elem* cond = condition->toElem(p);
+    llvm::SwitchInst* si = new llvm::SwitchInst(cond->getValue(), defbb ? defbb : endbb, cases->dim, p->scopebb());
+    delete cond;
+
+    // add the cases
+    size_t n = vcases.size();
+    for (size_t i=0; i<n; ++i)
+    {
+        si->addCase(vcases[i].second, vcases[i].first);
+    }
+
+    // insert case statements
+    for (size_t i=0; i<n; ++i)
+    {
+        llvm::BasicBlock* nextbb = (i == n-1) ? (defbb ? defbb : endbb) : vcases[i+1].first;
+        p->scope() = IRScope(vcases[i].first,nextbb);
+
+        p->loopbbs.push_back(IRScope(p->scopebb(),endbb));
+        static_cast<CaseStatement*>(cases->data[i])->statement->toIR(p);
+        p->loopbbs.pop_back();
+
+        llvm::BasicBlock* curbb = p->scopebb();
+        if (!curbb->empty() && !curbb->back().isTerminator())
+        {
+            new llvm::BranchInst(nextbb, curbb);
+        }
+    }
+
+    // default statement
+    if (defbb)
+    {
+        p->scope() = IRScope(defbb,endbb);
+        p->loopbbs.push_back(IRScope(defbb,endbb));
+        sdefault->statement->toIR(p);
+        p->loopbbs.pop_back();
+
+        llvm::BasicBlock* curbb = p->scopebb();
+        if (!curbb->empty() && !curbb->back().isTerminator())
+        {
+            new llvm::BranchInst(endbb, curbb);
+        }
+    }
+
+    gIR->scope() = IRScope(endbb,oldend);
+}
+
+#define STUBST(x) void x::toIR(IRState * p) {error("Statement type "#x" not implemented: %s", toChars());fatal();}
+//STUBST(BreakStatement);
+//STUBST(ForStatement);
+STUBST(WithStatement);
+STUBST(SynchronizedStatement);
+//STUBST(ReturnStatement);
+//STUBST(ContinueStatement);
+STUBST(DefaultStatement);
+STUBST(CaseStatement);
+//STUBST(SwitchStatement);
+STUBST(SwitchErrorStatement);
+STUBST(Statement);
+//STUBST(IfStatement);
+STUBST(ForeachStatement);
+//STUBST(DoStatement);
+//STUBST(WhileStatement);
+//STUBST(ExpStatement);
+//STUBST(CompoundStatement);
+//STUBST(ScopeStatement);
+STUBST(AsmStatement);
+//STUBST(TryCatchStatement);
+//STUBST(TryFinallyStatement);
+STUBST(VolatileStatement);
+STUBST(LabelStatement);
+//STUBST(ThrowStatement);
+STUBST(GotoCaseStatement);
+STUBST(GotoDefaultStatement);
+STUBST(GotoStatement);
+STUBST(UnrolledLoopStatement);
+//STUBST(OnScopeStatement);