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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Boogie;
namespace GPUVerify {
class StructuredRegion : IRegion {
Implementation impl;
WhileCmd cmd;
public StructuredRegion(Implementation impl) {
this.impl = impl;
}
public StructuredRegion(WhileCmd cmd) {
this.cmd = cmd;
}
public object Identifier() {
if (cmd != null)
return cmd;
else
return impl;
}
private StmtList StmtList() {
if (cmd != null)
return cmd.Body;
else
return impl.StructuredStmts;
}
private IEnumerable<Cmd> Cmds(StmtList stmts) {
foreach (var bb in stmts.BigBlocks) {
foreach (Cmd c in bb.simpleCmds)
yield return c;
if (bb.ec is IfCmd) {
var ic = (IfCmd)bb.ec;
foreach (var c in Cmds(ic.thn))
yield return c;
if (ic.elseBlock != null)
foreach (var c in Cmds(ic.elseBlock))
yield return c;
} else if (bb.ec is WhileCmd) {
var wc = (WhileCmd)bb.ec;
foreach (var c in Cmds(wc.Body))
yield return c;
}
}
}
private IEnumerable<object> CmdsChildRegions(StmtList stmts) {
foreach (var bb in stmts.BigBlocks) {
foreach (Cmd c in bb.simpleCmds)
yield return c;
if (bb.ec is IfCmd) {
var ic = (IfCmd)bb.ec;
foreach (var c in Cmds(ic.thn))
yield return c;
if (ic.elseBlock != null)
foreach (var c in Cmds(ic.elseBlock))
yield return c;
} else if (bb.ec is WhileCmd) {
var wc = (WhileCmd)bb.ec;
yield return new StructuredRegion(wc);
}
}
}
private IEnumerable<IRegion> SubRegions(StmtList stmts) {
foreach (var bb in stmts.BigBlocks) {
if (bb.ec is IfCmd) {
var ic = (IfCmd)bb.ec;
foreach (var r in SubRegions(ic.thn))
yield return r;
if (ic.elseBlock != null)
foreach (var r in SubRegions(ic.elseBlock))
yield return r;
} else if (bb.ec is WhileCmd) {
var wc = (WhileCmd)bb.ec;
yield return new StructuredRegion(wc);
foreach (var r in SubRegions(wc.Body))
yield return r;
}
}
}
public IEnumerable<Cmd> Cmds() {
return Cmds(StmtList());
}
public IEnumerable<object> CmdsChildRegions() {
return CmdsChildRegions(StmtList());
}
public IEnumerable<IRegion> SubRegions() {
return SubRegions(StmtList());
}
public Expr Guard() {
if (cmd != null)
return cmd.Guard;
else
return null;
}
public void AddInvariant(PredicateCmd pc) {
if (cmd != null)
cmd.Invariants.Add(pc);
}
}
}
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