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s2ir.d
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s2ir.d
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/**
* Compiler implementation of the
* $(LINK2 http://www.dlang.org, D programming language).
*
* Copyright: Copyright (C) 1999-2019 by The D Language Foundation, All Rights Reserved
* Authors: $(LINK2 http://www.digitalmars.com, Walter Bright)
* License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/tocsym.d, _s2ir.d)
* Documentation: $(LINK https://dlang.org/phobos/dmd_s2ir.html)
* Coverage: $(LINK https://codecov.io/gh/dlang/dmd/src/master/src/dmd/s2ir.d)
*/
module dmd.s2ir;
import core.stdc.stdio;
import core.stdc.string;
import core.stdc.stddef;
import core.stdc.stdlib;
import core.stdc.time;
import dmd.root.array;
import dmd.root.rmem;
import dmd.root.rootobject;
import dmd.aggregate;
import dmd.dclass;
import dmd.declaration;
import dmd.denum;
import dmd.dmodule;
import dmd.dsymbol;
import dmd.dstruct;
import dmd.dtemplate;
import dmd.e2ir;
import dmd.errors;
import dmd.expression;
import dmd.func;
import dmd.globals;
import dmd.glue;
import dmd.id;
import dmd.init;
import dmd.irstate;
import dmd.mtype;
import dmd.statement;
import dmd.target;
import dmd.toctype;
import dmd.tocsym;
import dmd.toir;
import dmd.tokens;
import dmd.visitor;
import dmd.backend.cc;
import dmd.backend.cdef;
import dmd.backend.cgcv;
import dmd.backend.code;
import dmd.backend.code_x86;
import dmd.backend.cv4;
import dmd.backend.dlist;
import dmd.backend.dt;
import dmd.backend.el;
import dmd.backend.global;
import dmd.backend.obj;
import dmd.backend.oper;
import dmd.backend.rtlsym;
import dmd.backend.ty;
import dmd.backend.type;
extern (C++):
alias toSymbol = dmd.tocsym.toSymbol;
alias toSymbol = dmd.glue.toSymbol;
void elem_setLoc(elem *e, const ref Loc loc) pure nothrow
{
srcpos_setLoc(e.Esrcpos, loc);
}
private void block_setLoc(block *b, const ref Loc loc) pure nothrow
{
srcpos_setLoc(b.Bsrcpos, loc);
}
private void srcpos_setLoc(ref Srcpos s, const ref Loc loc) pure nothrow
{
s.Sfilename = cast(char *)loc.filename;
s.Slinnum = loc.linnum;
s.Scharnum = loc.charnum;
}
/***********************************************
* Generate code to set index into scope table.
*/
private void setScopeIndex(Blockx *blx, block *b, int scope_index)
{
if (config.ehmethod == EHmethod.EH_WIN32 && !(blx.funcsym.Sfunc.Fflags3 & Feh_none))
block_appendexp(b, nteh_setScopeTableIndex(blx, scope_index));
}
/****************************************
* Allocate a new block, and set the tryblock.
*/
private block *block_calloc(Blockx *blx)
{
block *b = dmd.backend.global.block_calloc();
b.Btry = blx.tryblock;
return b;
}
/****************************************
* Get or create a label declaration.
*/
private Label *getLabel(IRState *irs, Blockx *blx, Statement s)
{
Label **slot = irs.lookupLabel(s);
if (slot == null)
{
Label *label = new Label();
label.lblock = blx ? block_calloc(blx) : dmd.backend.global.block_calloc();
label.fwdrefs = null;
irs.insertLabel(s, label);
return label;
}
return *slot;
}
/**************************************
* Convert label to block.
*/
private block *labelToBlock(IRState *irs, const ref Loc loc, Blockx *blx, LabelDsymbol label, int flag = 0)
{
if (!label.statement)
{
error(loc, "undefined label `%s`", label.toChars());
return null;
}
Label *l = getLabel(irs, null, label.statement);
if (flag)
{
// Keep track of the forward reference to this block, so we can check it later
if (!l.fwdrefs)
l.fwdrefs = blx.curblock;
}
return l.lblock;
}
/**************************************
* Add in code to increment usage count for linnum.
*/
private void incUsage(IRState *irs, const ref Loc loc)
{
if (irs.params.cov && loc.linnum)
{
block_appendexp(irs.blx.curblock, incUsageElem(irs, loc));
}
}
private extern (C++) class S2irVisitor : Visitor
{
IRState *irs;
this(IRState *irs)
{
this.irs = irs;
}
alias visit = Visitor.visit;
/****************************************
* This should be overridden by each statement class.
*/
override void visit(Statement s)
{
assert(0);
}
/*************************************
*/
override void visit(ScopeGuardStatement s)
{
}
/****************************************
*/
override void visit(IfStatement s)
{
elem *e;
Blockx *blx = irs.blx;
//printf("IfStatement.toIR('%s')\n", s.condition.toChars());
IRState mystate = IRState(irs, s);
// bexit is the block that gets control after this IfStatement is done
block *bexit = mystate.breakBlock ? mystate.breakBlock : dmd.backend.global.block_calloc();
incUsage(irs, s.loc);
e = toElemDtor(s.condition, &mystate);
block_appendexp(blx.curblock, e);
block *bcond = blx.curblock;
block_next(blx, BCiftrue, null);
bcond.appendSucc(blx.curblock);
if (s.ifbody)
Statement_toIR(s.ifbody, &mystate);
blx.curblock.appendSucc(bexit);
if (s.elsebody)
{
block_next(blx, BCgoto, null);
bcond.appendSucc(blx.curblock);
Statement_toIR(s.elsebody, &mystate);
blx.curblock.appendSucc(bexit);
}
else
bcond.appendSucc(bexit);
block_next(blx, BCgoto, bexit);
}
/**************************************
*/
override void visit(PragmaStatement s)
{
//printf("PragmaStatement.toIR()\n");
if (s.ident == Id.startaddress)
{
assert(s.args && s.args.dim == 1);
Expression e = (*s.args)[0];
Dsymbol sa = getDsymbol(e);
FuncDeclaration f = sa.isFuncDeclaration();
assert(f);
Symbol *sym = toSymbol(f);
while (irs.prev)
irs = irs.prev;
irs.startaddress = sym;
}
}
/***********************
*/
override void visit(WhileStatement s)
{
assert(0); // was "lowered"
}
/******************************************
*/
override void visit(DoStatement s)
{
Blockx *blx = irs.blx;
IRState mystate = IRState(irs,s);
mystate.breakBlock = block_calloc(blx);
mystate.contBlock = block_calloc(blx);
block *bpre = blx.curblock;
block_next(blx, BCgoto, null);
bpre.appendSucc(blx.curblock);
mystate.contBlock.appendSucc(blx.curblock);
mystate.contBlock.appendSucc(mystate.breakBlock);
if (s._body)
Statement_toIR(s._body, &mystate);
blx.curblock.appendSucc(mystate.contBlock);
block_next(blx, BCgoto, mystate.contBlock);
incUsage(irs, s.condition.loc);
block_appendexp(mystate.contBlock, toElemDtor(s.condition, &mystate));
block_next(blx, BCiftrue, mystate.breakBlock);
}
/*****************************************
*/
override void visit(ForStatement s)
{
//printf("visit(ForStatement)) %u..%u\n", s.loc.linnum, s.endloc.linnum);
Blockx *blx = irs.blx;
IRState mystate = IRState(irs,s);
mystate.breakBlock = block_calloc(blx);
mystate.contBlock = block_calloc(blx);
if (s._init)
Statement_toIR(s._init, &mystate);
block *bpre = blx.curblock;
block_next(blx,BCgoto,null);
block *bcond = blx.curblock;
bpre.appendSucc(bcond);
mystate.contBlock.appendSucc(bcond);
if (s.condition)
{
incUsage(irs, s.condition.loc);
block_appendexp(bcond, toElemDtor(s.condition, &mystate));
block_next(blx,BCiftrue,null);
bcond.appendSucc(blx.curblock);
bcond.appendSucc(mystate.breakBlock);
}
else
{ /* No conditional, it's a straight goto
*/
block_next(blx,BCgoto,null);
bcond.appendSucc(blx.curblock);
}
if (s._body)
Statement_toIR(s._body, &mystate);
/* End of the body goes to the continue block
*/
blx.curblock.appendSucc(mystate.contBlock);
block_setLoc(blx.curblock, s.endloc);
block_next(blx, BCgoto, mystate.contBlock);
if (s.increment)
{
incUsage(irs, s.increment.loc);
block_appendexp(mystate.contBlock, toElemDtor(s.increment, &mystate));
}
/* The 'break' block follows the for statement.
*/
block_next(blx,BCgoto, mystate.breakBlock);
}
/**************************************
*/
override void visit(ForeachStatement s)
{
printf("ForeachStatement.toIR() %s\n", s.toChars());
assert(0); // done by "lowering" in the front end
}
/**************************************
*/
override void visit(ForeachRangeStatement s)
{
assert(0);
}
/****************************************
*/
override void visit(BreakStatement s)
{
block *bbreak;
block *b;
Blockx *blx = irs.blx;
bbreak = irs.getBreakBlock(s.ident);
assert(bbreak);
b = blx.curblock;
incUsage(irs, s.loc);
// Adjust exception handler scope index if in different try blocks
if (b.Btry != bbreak.Btry)
{
//setScopeIndex(blx, b, bbreak.Btry ? bbreak.Btry.Bscope_index : -1);
}
/* Nothing more than a 'goto' to the current break destination
*/
b.appendSucc(bbreak);
block_setLoc(b, s.loc);
block_next(blx, BCgoto, null);
}
/************************************
*/
override void visit(ContinueStatement s)
{
block *bcont;
block *b;
Blockx *blx = irs.blx;
//printf("ContinueStatement.toIR() %p\n", this);
bcont = irs.getContBlock(s.ident);
assert(bcont);
b = blx.curblock;
incUsage(irs, s.loc);
// Adjust exception handler scope index if in different try blocks
if (b.Btry != bcont.Btry)
{
//setScopeIndex(blx, b, bcont.Btry ? bcont.Btry.Bscope_index : -1);
}
/* Nothing more than a 'goto' to the current continue destination
*/
b.appendSucc(bcont);
block_setLoc(b, s.loc);
block_next(blx, BCgoto, null);
}
/**************************************
*/
override void visit(GotoStatement s)
{
Blockx *blx = irs.blx;
assert(s.label.statement);
assert(s.tf == s.label.statement.tf);
block *bdest = labelToBlock(irs, s.loc, blx, s.label, 1);
if (!bdest)
return;
block *b = blx.curblock;
incUsage(irs, s.loc);
b.appendSucc(bdest);
block_setLoc(b, s.loc);
// Check that bdest is in an enclosing try block
for (block *bt = b.Btry; bt != bdest.Btry; bt = bt.Btry)
{
if (!bt)
{
//printf("b.Btry = %p, bdest.Btry = %p\n", b.Btry, bdest.Btry);
s.error("cannot `goto` into `try` block");
break;
}
}
block_next(blx,BCgoto,null);
}
override void visit(LabelStatement s)
{
//printf("LabelStatement.toIR() %p, statement = %p\n", this, statement);
Blockx *blx = irs.blx;
block *bc = blx.curblock;
IRState mystate = IRState(irs,s);
mystate.ident = s.ident;
Label *label = getLabel(irs, blx, s);
// At last, we know which try block this label is inside
label.lblock.Btry = blx.tryblock;
// Go through the forward references and check.
if (label.fwdrefs)
{
block *b = label.fwdrefs;
if (b.Btry != label.lblock.Btry)
{
// Check that lblock is in an enclosing try block
for (block *bt = b.Btry; bt != label.lblock.Btry; bt = bt.Btry)
{
if (!bt)
{
//printf("b.Btry = %p, label.lblock.Btry = %p\n", b.Btry, label.lblock.Btry);
s.error("cannot `goto` into `try` block");
break;
}
}
}
}
block_next(blx, BCgoto, label.lblock);
bc.appendSucc(blx.curblock);
if (s.statement)
Statement_toIR(s.statement, &mystate);
}
/**************************************
*/
override void visit(SwitchStatement s)
{
Blockx *blx = irs.blx;
//printf("SwitchStatement.toIR()\n");
IRState mystate = IRState(irs,s);
mystate.switchBlock = blx.curblock;
/* Block for where "break" goes to
*/
mystate.breakBlock = block_calloc(blx);
/* Block for where "default" goes to.
* If there is a default statement, then that is where default goes.
* If not, then do:
* default: break;
* by making the default block the same as the break block.
*/
mystate.defaultBlock = s.sdefault ? block_calloc(blx) : mystate.breakBlock;
const numcases = s.cases ? s.cases.dim : 0;
incUsage(irs, s.loc);
elem *econd = toElemDtor(s.condition, &mystate);
if (s.hasVars)
{ /* Generate a sequence of if-then-else blocks for the cases.
*/
if (econd.Eoper != OPvar)
{
elem *e = exp2_copytotemp(econd);
block_appendexp(mystate.switchBlock, e);
econd = e.EV.E2;
}
if (numcases)
foreach (cs; *s.cases)
{
elem *ecase = toElemDtor(cs.exp, &mystate);
elem *e = el_bin(OPeqeq, TYbool, el_copytree(econd), ecase);
block *b = blx.curblock;
block_appendexp(b, e);
Label *clabel = getLabel(irs, blx, cs);
block_next(blx, BCiftrue, null);
b.appendSucc(clabel.lblock);
b.appendSucc(blx.curblock);
}
/* The final 'else' clause goes to the default
*/
block *b = blx.curblock;
block_next(blx, BCgoto, null);
b.appendSucc(mystate.defaultBlock);
Statement_toIR(s._body, &mystate);
/* Have the end of the switch body fall through to the block
* following the switch statement.
*/
block_goto(blx, BCgoto, mystate.breakBlock);
return;
}
if (s.condition.type.isString())
{
// This codepath was replaced by lowering during semantic
// to object.__switch in druntime.
assert(0);
}
block_appendexp(mystate.switchBlock, econd);
block_next(blx,BCswitch,null);
// Corresponding free is in block_free
alias TCase = typeof(mystate.switchBlock.Bswitch[0]);
auto pu = cast(TCase *)(.malloc(TCase.sizeof * (numcases + 1)));
mystate.switchBlock.Bswitch = pu;
/* First pair is the number of cases, and the default block
*/
*pu++ = numcases;
mystate.switchBlock.appendSucc(mystate.defaultBlock);
/* Fill in the first entry for each pair, which is the case value.
* CaseStatement.toIR() will fill in
* the second entry for each pair with the block.
*/
if (numcases)
foreach (cs; *s.cases)
*pu++ = cs.exp.toInteger();
Statement_toIR(s._body, &mystate);
/* Have the end of the switch body fall through to the block
* following the switch statement.
*/
block_goto(blx, BCgoto, mystate.breakBlock);
}
override void visit(CaseStatement s)
{
Blockx *blx = irs.blx;
block *bcase = blx.curblock;
Label *clabel = getLabel(irs, blx, s);
block_next(blx, BCgoto, clabel.lblock);
block *bsw = irs.getSwitchBlock();
if (bsw.BC == BCswitch)
bsw.appendSucc(clabel.lblock); // second entry in pair
bcase.appendSucc(clabel.lblock);
if (blx.tryblock != bsw.Btry)
s.error("case cannot be in different `try` block level from `switch`");
incUsage(irs, s.loc);
if (s.statement)
Statement_toIR(s.statement, irs);
}
override void visit(DefaultStatement s)
{
Blockx *blx = irs.blx;
block *bcase = blx.curblock;
block *bdefault = irs.getDefaultBlock();
block_next(blx,BCgoto,bdefault);
bcase.appendSucc(blx.curblock);
if (blx.tryblock != irs.getSwitchBlock().Btry)
s.error("default cannot be in different `try` block level from `switch`");
incUsage(irs, s.loc);
if (s.statement)
Statement_toIR(s.statement, irs);
}
override void visit(GotoDefaultStatement s)
{
block *b;
Blockx *blx = irs.blx;
block *bdest = irs.getDefaultBlock();
b = blx.curblock;
// The rest is equivalent to GotoStatement
// Adjust exception handler scope index if in different try blocks
if (b.Btry != bdest.Btry)
{
// Check that bdest is in an enclosing try block
for (block *bt = b.Btry; bt != bdest.Btry; bt = bt.Btry)
{
if (!bt)
{
//printf("b.Btry = %p, bdest.Btry = %p\n", b.Btry, bdest.Btry);
s.error("cannot `goto` into `try` block");
break;
}
}
//setScopeIndex(blx, b, bdest.Btry ? bdest.Btry.Bscope_index : -1);
}
b.appendSucc(bdest);
incUsage(irs, s.loc);
block_next(blx,BCgoto,null);
}
override void visit(GotoCaseStatement s)
{
Blockx *blx = irs.blx;
Label *clabel = getLabel(irs, blx, s.cs);
block *bdest = clabel.lblock;
block *b = blx.curblock;
// The rest is equivalent to GotoStatement
// Adjust exception handler scope index if in different try blocks
if (b.Btry != bdest.Btry)
{
// Check that bdest is in an enclosing try block
for (block *bt = b.Btry; bt != bdest.Btry; bt = bt.Btry)
{
if (!bt)
{
//printf("b.Btry = %p, bdest.Btry = %p\n", b.Btry, bdest.Btry);
s.error("cannot `goto` into `try` block");
break;
}
}
//setScopeIndex(blx, b, bdest.Btry ? bdest.Btry.Bscope_index : -1);
}
b.appendSucc(bdest);
incUsage(irs, s.loc);
block_next(blx,BCgoto,null);
}
override void visit(SwitchErrorStatement s)
{
// SwitchErrors are lowered to a CallExpression to object.__switch_error() in druntime
// We still need the call wrapped in SwitchErrorStatement to pass compiler error checks.
assert(s.exp !is null, "SwitchErrorStatement needs to have a valid Expression.");
Blockx *blx = irs.blx;
//printf("SwitchErrorStatement.toIR(), exp = %s\n", s.exp ? s.exp.toChars() : "");
incUsage(irs, s.loc);
block_appendexp(blx.curblock, toElemDtor(s.exp, irs));
}
/**************************************
*/
override void visit(ReturnStatement s)
{
//printf("s2ir.ReturnStatement: %s\n", s.toChars());
Blockx *blx = irs.blx;
BC bc;
incUsage(irs, s.loc);
if (s.exp)
{
elem *e;
FuncDeclaration func = irs.getFunc();
assert(func);
auto tf = func.type.isTypeFunction();
assert(tf);
RET retmethod = retStyle(tf, func.needThis());
if (retmethod == RET.stack)
{
elem *es;
bool writetohp;
/* If returning struct literal, write result
* directly into return value
*/
if (auto sle = s.exp.isStructLiteralExp())
{
sle.sym = irs.shidden;
writetohp = true;
}
/* Detect function call that returns the same struct
* and construct directly into *shidden
*/
else if (auto ce = s.exp.isCallExp())
{
if (ce.e1.op == TOK.variable || ce.e1.op == TOK.star)
{
Type t = ce.e1.type.toBasetype();
if (t.ty == Tdelegate)
t = t.nextOf();
if (t.ty == Tfunction && retStyle(cast(TypeFunction)t, ce.f && ce.f.needThis()) == RET.stack)
{
irs.ehidden = el_var(irs.shidden);
e = toElemDtor(s.exp, irs);
e = el_una(OPaddr, TYnptr, e);
goto L1;
}
}
else if (auto dve = ce.e1.isDotVarExp())
{
auto fd = dve.var.isFuncDeclaration();
if (fd && fd.isCtorDeclaration())
{
if (auto sle = dve.e1.isStructLiteralExp())
{
sle.sym = irs.shidden;
writetohp = true;
}
}
Type t = ce.e1.type.toBasetype();
if (t.ty == Tdelegate)
t = t.nextOf();
if (t.ty == Tfunction && retStyle(cast(TypeFunction)t, fd && fd.needThis()) == RET.stack)
{
irs.ehidden = el_var(irs.shidden);
e = toElemDtor(s.exp, irs);
e = el_una(OPaddr, TYnptr, e);
goto L1;
}
}
}
e = toElemDtor(s.exp, irs);
assert(e);
if (writetohp ||
(func.nrvo_can && func.nrvo_var))
{
// Return value via hidden pointer passed as parameter
// Write exp; return shidden;
es = e;
}
else
{
// Return value via hidden pointer passed as parameter
// Write *shidden=exp; return shidden;
es = el_una(OPind,e.Ety,el_var(irs.shidden));
es = elAssign(es, e, s.exp.type, null);
}
e = el_var(irs.shidden);
e = el_bin(OPcomma, e.Ety, es, e);
}
else if (tf.isref)
{
// Reference return, so convert to a pointer
e = toElemDtor(s.exp, irs);
e = addressElem(e, s.exp.type.pointerTo());
}
else
{
e = toElemDtor(s.exp, irs);
assert(e);
}
L1:
elem_setLoc(e, s.loc);
block_appendexp(blx.curblock, e);
bc = BCretexp;
// if (type_zeroCopy(Type_toCtype(s.exp.type)))
// bc = BCret;
}
else
bc = BCret;
block *finallyBlock;
if (config.ehmethod != EHmethod.EH_DWARF &&
!irs.isNothrow() &&
(finallyBlock = irs.getFinallyBlock()) != null)
{
assert(finallyBlock.BC == BC_finally);
blx.curblock.appendSucc(finallyBlock);
}
block_next(blx, bc, null);
}
/**************************************
*/
override void visit(ExpStatement s)
{
Blockx *blx = irs.blx;
//printf("ExpStatement.toIR(), exp = %s\n", s.exp ? s.exp.toChars() : "");
if (s.exp)
{
if (s.exp.hasCode)
incUsage(irs, s.loc);
block_appendexp(blx.curblock, toElemDtor(s.exp, irs));
}
}
/**************************************
*/
override void visit(CompoundStatement s)
{
if (s.statements)
{
foreach (s2; *s.statements)
{
if (s2)
Statement_toIR(s2, irs);
}
}
}
/**************************************
*/
override void visit(UnrolledLoopStatement s)
{
Blockx *blx = irs.blx;
IRState mystate = IRState(irs,s);
mystate.breakBlock = block_calloc(blx);
block *bpre = blx.curblock;
block_next(blx, BCgoto, null);
block *bdo = blx.curblock;
bpre.appendSucc(bdo);
block *bdox;
foreach (s2; *s.statements)
{
if (s2)
{
mystate.contBlock = block_calloc(blx);
Statement_toIR(s2, &mystate);
bdox = blx.curblock;
block_next(blx, BCgoto, mystate.contBlock);
bdox.appendSucc(mystate.contBlock);
}
}
bdox = blx.curblock;
block_next(blx, BCgoto, mystate.breakBlock);
bdox.appendSucc(mystate.breakBlock);
}
/**************************************
*/
override void visit(ScopeStatement s)
{
if (s.statement)
{
Blockx *blx = irs.blx;
IRState mystate = IRState(irs,s);
if (mystate.prev.ident)
mystate.ident = mystate.prev.ident;
Statement_toIR(s.statement, &mystate);
if (mystate.breakBlock)
block_goto(blx,BCgoto,mystate.breakBlock);
}
}
/***************************************
*/
override void visit(WithStatement s)
{
//printf("WithStatement.toIR()\n");
if (s.exp.op == TOK.scope_ || s.exp.op == TOK.type)
{
}
else
{
// Declare with handle
auto sp = toSymbol(s.wthis);
symbol_add(sp);
// Perform initialization of with handle
auto ie = s.wthis._init.isExpInitializer();
assert(ie);
auto ei = toElemDtor(ie.exp, irs);
auto e = el_var(sp);
e = el_bin(OPeq,e.Ety, e, ei);
elem_setLoc(e, s.loc);
incUsage(irs, s.loc);
block_appendexp(irs.blx.curblock,e);
}
// Execute with block
if (s._body)
Statement_toIR(s._body, irs);
}
/***************************************
*/
override void visit(ThrowStatement s)
{
// throw(exp)
Blockx *blx = irs.blx;
incUsage(irs, s.loc);
elem *e = toElemDtor(s.exp, irs);
const int rtlthrow = config.ehmethod == EHmethod.EH_DWARF ? RTLSYM_THROWDWARF : RTLSYM_THROWC;
e = el_bin(OPcall, TYvoid, el_var(getRtlsym(rtlthrow)),e);
block_appendexp(blx.curblock, e);
block_next(blx, BCexit, null); // throw never returns
}
/***************************************
* Builds the following:
* _try
* block
* jcatch
* handler
* A try-catch statement.
*/
override void visit(TryCatchStatement s)
{
Blockx *blx = irs.blx;
if (blx.funcsym.Sfunc.Fflags3 & Feh_none) printf("visit %s\n", blx.funcsym.Sident.ptr);
if (blx.funcsym.Sfunc.Fflags3 & Feh_none) assert(0);
if (config.ehmethod == EHmethod.EH_WIN32)
nteh_declarvars(blx);
IRState mystate = IRState(irs,s);
block *tryblock = block_goto(blx,BCgoto,null);
int previndex = blx.scope_index;
tryblock.Blast_index = previndex;
blx.scope_index = tryblock.Bscope_index = blx.next_index++;
// Set the current scope index
setScopeIndex(blx,tryblock,tryblock.Bscope_index);
// This is the catch variable
tryblock.jcatchvar = symbol_genauto(type_fake(mTYvolatile | TYnptr));
blx.tryblock = tryblock;
block *breakblock = block_calloc(blx);
block_goto(blx,BC_try,null);
if (s._body)
{