Examples with AbstractCopyStmt org.mapleir.ir.code.stmt.copy.AbstractCopyStmt used on opensource projects

Example 6 with AbstractCopyStmt

use of org.mapleir.ir.code.stmt.copy.AbstractCopyStmt in project maple-ir by LLVM-but-worse.

the class SSAGenPass method unstackDefs.

private void unstackDefs(BasicBlock b) {
    for (Stmt s : b) {
        if (s.getOpcode() == Opcode.PHI_STORE || s.getOpcode() == Opcode.LOCAL_STORE) {
            AbstractCopyStmt cvs = (AbstractCopyStmt) s;
            Local l = cvs.getVariable().getLocal();
            l = builder.graph.getLocals().get(l.getIndex(), l.isStack());
            stacks.get(l).pop();
        }
    }
}

Example 7 with AbstractCopyStmt

use of org.mapleir.ir.code.stmt.copy.AbstractCopyStmt in project maple-ir by LLVM-but-worse.

the class SSAGenPass method processDeferredTranslations.

private int processDeferredTranslations() {
    int i = 0;
    Iterator<Entry<VersionedLocal, Set<VarExpr>>> it = pool.uses.entrySet().iterator();
    while (it.hasNext()) {
        Entry<VersionedLocal, Set<VarExpr>> e = it.next();
        VersionedLocal vl = e.getKey();
        if (deferred.contains(vl) || vl.isStack()) {
            Set<VarExpr> useSet = e.getValue();
            AbstractCopyStmt def = pool.defs.get(vl);
            if (def != null && useSet.size() == 1) {
                /* In this case, the only place that the value
					 * of this assignment will be used is at the use site.
					 * Since that value can not be spread until this one
					 * is, we can propagate it.*/
                if (def.getOpcode() != Opcode.PHI_STORE) {
                    VarExpr use = useSet.iterator().next();
                    LatestValue val = latest.get(vl);
                    // System.out.println();
                    // System.out.println();
                    // System.out.println(def);
                    // System.out.println(use);
                    /* phi var*/
                    Expr rhs = def.getExpression();
                    if (use.getParent() != null) {
                        if (canTransferHandlers(def.getBlock(), use.getBlock()) && val.canPropagate(def, use.getRootParent(), use, false)) {
                            CodeUnit parent = use.getParent();
                            if (rhs.getOpcode() == Opcode.CATCH) {
                                // CodeUnit rp = use.getRootParent();
                                // System.out.println("DENIED NIGGA");
                                // System.out.println("replace " + vl + " with " + rhs);
                                // System.out.println(" in " + parent);
                                // System.out.println(" kill def: " + def);
                                // System.out.println();
                                deferred.remove(vl);
                                continue;
                            // check to see if we're moving it to the
                            // first expression in the block, if we aren't
                            // then deny, otherwise we can get rid of the local.
                            // if(rp.getBlock().indexOf(rp) != 1 || rp.enumerateExecutionOrder().indexOf(use) != 0) {
                            // 
                            // }
                            }
                            rhs.unlink();
                            def.delete();
                            pool.defs.remove(vl);
                            useSet.clear();
                            parent.overwrite(rhs, parent.indexOf(use));
                            i++;
                            it.remove();
                        }
                    }
                }
            }
        }
    }
    return i;
}

Example 8 with AbstractCopyStmt

use of org.mapleir.ir.code.stmt.copy.AbstractCopyStmt in project maple-ir by LLVM-but-worse.

the class LatestValue method canPropagate.

public boolean canPropagate(AbstractCopyStmt def, Stmt use, Expr tail, boolean debug) {
    Local local = def.getVariable().getLocal();
    Set<Stmt> path = findReachable(def, use);
    path.remove(def);
    path.add(use);
    if (debug) {
        System.out.println();
        System.out.println("from " + def);
        System.out.println("to " + use);
        System.out.println(this);
        System.out.println("constraints: " + constraints.size());
        for (Constraint c : constraints) {
            System.out.println(" " + c);
        }
        System.out.println(" path:");
        for (Stmt s : path) {
            System.out.println("  " + s);
        }
    }
    for (Stmt stmt : path) {
        if (stmt != use) {
            for (CodeUnit s : stmt.enumerateWithSelf()) {
                for (Constraint c : constraints) {
                    if (c.fails(s)) {
                        if (debug) {
                            System.out.println("  Fail: " + c);
                            System.out.println("  stmt: " + stmt);
                            System.out.println("     c: " + s);
                        }
                        return false;
                    }
                }
            }
        } else {
            if (constraints.size() > 0) {
                for (CodeUnit s : stmt.enumerateExecutionOrder()) {
                    if (s == tail && (s.getOpcode() == Opcode.LOCAL_LOAD && ((VarExpr) s).getLocal() == local)) {
                        break;
                    } else {
                        for (Constraint c : constraints) {
                            if (c.fails(s)) {
                                if (debug) {
                                    System.out.println("  Fail: " + c);
                                    System.out.println("  stmt: " + stmt);
                                    System.out.println("     c: " + s);
                                }
                                return false;
                            }
                        }
                    }
                }
            }
        }
    }
    return true;
}

Example 9 with AbstractCopyStmt

use of org.mapleir.ir.code.stmt.copy.AbstractCopyStmt in project maple-ir by LLVM-but-worse.

the class PoolLocalValueResolver method getValues.

@Override
public TaintableSet<Expr> getValues(ControlFlowGraph cfg, Local l) {
    if (cfg.getLocals() != pool) {
        throw new UnsupportedOperationException();
    }
    AbstractCopyStmt copy = pool.defs.get(l);
    TaintableSet<Expr> set = new TaintableSet<>();
    if (copy.getOpcode() == Opcode.PHI_STORE) {
    // checkRecursive(l);
    // PhiExpr phi = ((CopyPhiStmt) copy).getExpression();
    /*for(Expr e : phi.getArguments().values()) {
				if(e.getOpcode() == Opcode.LOCAL_LOAD) {
					Local l2 = ((VarExpr) e).getLocal();
					
					if(l2 == l) {
						throw new RuntimeException(copy.toString());
					}
				}
			}*/
    // set.addAll(phi.getArguments().values());
    } else {
    // set.add(copy.getExpression());
    }
    set.add(copy.getExpression());
    return set;
}

Example 10 with AbstractCopyStmt

use of org.mapleir.ir.code.stmt.copy.AbstractCopyStmt in project maple-ir by LLVM-but-worse.

the class ConstantParameterPass method inlineConstant.

private void inlineConstant(ControlFlowGraph cfg, int argLocalIndex, Object o) {
    /* we don't actually demote the synthetic copy
		 * here as we would also need to change the
		 * method desc and we can't do that until
		 * later so we defer it. */
    LocalsPool pool = cfg.getLocals();
    /* create the spill variable but not the
		 * actual definition yet. */
    VersionedLocal argLocal = pool.get(argLocalIndex, 0, false);
    VersionedLocal spill = pool.makeLatestVersion(argLocal);
    AbstractCopyStmt synthParamCopy = pool.defs.get(argLocal);
    ConstantExpr rhsVal = new ConstantExpr(o, synthParamCopy.getType() == Type.BOOLEAN_TYPE ? Type.BYTE_TYPE : synthParamCopy.getType());
    /* we have to maintain local references in
		 * phis as opposed to direct constant refs,
		 * so we go through every use of the argLocal
		 * and either replace it with the constant or
		 * a reference to the spill local if it is in
		 * a phi. */
    Set<VarExpr> spillUses = new HashSet<>();
    boolean requireSpill = false;
    Iterator<VarExpr> it = pool.uses.get(argLocal).iterator();
    while (it.hasNext()) {
        VarExpr v = it.next();
        if (v.getParent() == null) {
            /* the use is in a phi, we can't
				 * remove the def. 
				 * 
				 * we also replace the old var
				 * with the new spill one so we
				 * have to add this as a use of
				 * the new spill local. */
            spillUses.add(v);
            v.setLocal(spill);
            requireSpill = true;
        } else {
            CodeUnit par = v.getParent();
            par.overwrite(rhsVal.copy(), par.indexOf(v));
        }
        /* this use is no longer associated
			 * with the old argLocal. */
        it.remove();
    }
    if (pool.uses.get(argLocal).size() != 0) {
        throw new IllegalStateException(String.format("l:%s, uses:%s", argLocal, pool.uses.get(argLocal)));
    }
    if (requireSpill) {
        /* generate the copy for the spill (v = const) */
        CopyVarStmt spillCopy = new CopyVarStmt(new VarExpr(spill, synthParamCopy.getVariable().getType()), rhsVal);
        synthParamCopy.getBlock().add(spillCopy);
        /* initialise data entries for the new spill
			 * variable. */
        pool.defs.put(spill, spillCopy);
        pool.uses.put(spill, spillUses);
    }
}