Handle lvalues inside conditional operator right + fix init_expr_trans to fix materializeTempExpr not connecting nodes
Summary: public Conditional operator in C++ allows to return lvalues as a result of the operator. Make infer frontend smart enough to detect when that happens and treat this case correctly Reviewed By: ddino Differential Revision: D2729468 fb-gh-sync-id: f4a110dmaster
Andrzej Kotulski
9 years ago
committed by
facebook-github-bot-7
parent
9c9504ba51
commit
92690551a6
@ -0,0 +1,63 @@
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/*
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* Copyright (c) 2015 - present Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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int choose_lvalue(int a) {
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int v1 = 0, v2 = 1;
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int v3 = a ? v1 : v2;
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return v3;
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}
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int choose_rvalue(int a) {
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int v1 = 0;
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int v3 = a ? v1 : 1;
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return v3;
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}
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int assign_conditional(int a) {
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int v1 = 0, v2 = 0;
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(a ? v1 : v2) = 1;
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return v1;
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}
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int div_temp_lvalue(int a, int b) {
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const int &r = a ? b : 1;
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return 1 / r;
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}
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int div0_choose_lvalue() {
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return 1 / choose_lvalue(1);
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}
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int div1_choose_lvalue() {
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return 1 / choose_lvalue(0);
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}
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int div0_choose_rvalue() {
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return 1 / choose_rvalue(1);
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}
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int div1_choose_rvalue() {
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return 1 / choose_rvalue(0);
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}
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int div0_assign_conditional() {
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return 1 / assign_conditional(0);
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}
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int div1_assign_conditional() {
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return 1 / assign_conditional(1);
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}
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int div0_temp_lvalue() {
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return div_temp_lvalue(1, 0);
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}
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int div1_temp_lvalue() {
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return div_temp_lvalue(0, 1);
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}
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@ -0,0 +1,254 @@
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digraph iCFG {
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65 [label="65: Return Stmt \n n$0=_fun_div_temp_lvalue(0:int ,1:int ) [line 62]\n *&return:int =n$0 [line 62]\n REMOVE_TEMPS(n$0); [line 62]\n APPLY_ABSTRACTION; [line 62]\n " shape="box"]
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65 -> 64 ;
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64 [label="64: Exit div1_temp_lvalue \n " color=yellow style=filled]
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63 [label="63: Start div1_temp_lvalue\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 61]\n " color=yellow style=filled]
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63 -> 65 ;
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62 [label="62: Return Stmt \n n$0=_fun_div_temp_lvalue(1:int ,0:int ) [line 58]\n *&return:int =n$0 [line 58]\n REMOVE_TEMPS(n$0); [line 58]\n APPLY_ABSTRACTION; [line 58]\n " shape="box"]
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62 -> 61 ;
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61 [label="61: Exit div0_temp_lvalue \n " color=yellow style=filled]
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60 [label="60: Start div0_temp_lvalue\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 57]\n " color=yellow style=filled]
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60 -> 62 ;
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59 [label="59: Return Stmt \n n$0=_fun_assign_conditional(1:int ) [line 54]\n *&return:int =(1 / n$0) [line 54]\n REMOVE_TEMPS(n$0); [line 54]\n APPLY_ABSTRACTION; [line 54]\n " shape="box"]
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59 -> 58 ;
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58 [label="58: Exit div1_assign_conditional \n " color=yellow style=filled]
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57 [label="57: Start div1_assign_conditional\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 53]\n " color=yellow style=filled]
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57 -> 59 ;
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56 [label="56: Return Stmt \n n$0=_fun_assign_conditional(0:int ) [line 50]\n *&return:int =(1 / n$0) [line 50]\n REMOVE_TEMPS(n$0); [line 50]\n APPLY_ABSTRACTION; [line 50]\n " shape="box"]
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56 -> 55 ;
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55 [label="55: Exit div0_assign_conditional \n " color=yellow style=filled]
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54 [label="54: Start div0_assign_conditional\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 49]\n " color=yellow style=filled]
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54 -> 56 ;
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53 [label="53: Return Stmt \n n$0=_fun_choose_rvalue(0:int ) [line 46]\n *&return:int =(1 / n$0) [line 46]\n REMOVE_TEMPS(n$0); [line 46]\n APPLY_ABSTRACTION; [line 46]\n " shape="box"]
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53 -> 52 ;
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52 [label="52: Exit div1_choose_rvalue \n " color=yellow style=filled]
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51 [label="51: Start div1_choose_rvalue\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 45]\n " color=yellow style=filled]
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51 -> 53 ;
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50 [label="50: Return Stmt \n n$0=_fun_choose_rvalue(1:int ) [line 42]\n *&return:int =(1 / n$0) [line 42]\n REMOVE_TEMPS(n$0); [line 42]\n APPLY_ABSTRACTION; [line 42]\n " shape="box"]
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50 -> 49 ;
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49 [label="49: Exit div0_choose_rvalue \n " color=yellow style=filled]
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48 [label="48: Start div0_choose_rvalue\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 41]\n " color=yellow style=filled]
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48 -> 50 ;
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47 [label="47: Return Stmt \n n$0=_fun_choose_lvalue(0:int ) [line 38]\n *&return:int =(1 / n$0) [line 38]\n REMOVE_TEMPS(n$0); [line 38]\n APPLY_ABSTRACTION; [line 38]\n " shape="box"]
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47 -> 46 ;
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46 [label="46: Exit div1_choose_lvalue \n " color=yellow style=filled]
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45 [label="45: Start div1_choose_lvalue\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 37]\n " color=yellow style=filled]
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45 -> 47 ;
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44 [label="44: Return Stmt \n n$0=_fun_choose_lvalue(1:int ) [line 34]\n *&return:int =(1 / n$0) [line 34]\n REMOVE_TEMPS(n$0); [line 34]\n APPLY_ABSTRACTION; [line 34]\n " shape="box"]
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44 -> 43 ;
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43 [label="43: Exit div0_choose_lvalue \n " color=yellow style=filled]
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42 [label="42: Start div0_choose_lvalue\nFormals: \nLocals: \n DECLARE_LOCALS(&return); [line 33]\n " color=yellow style=filled]
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42 -> 44 ;
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41 [label="41: DeclStmt \n n$5=*&SIL_temp_conditional___36:int [line 29]\n NULLIFY(&SIL_temp_conditional___36,true); [line 29]\n *&SIL_materialize_temp__n$2:int =n$5 [line 29]\n *&r:int &=&SIL_materialize_temp__n$2 [line 29]\n REMOVE_TEMPS(n$5); [line 29]\n " shape="box"]
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41 -> 35 ;
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40 [label="40: ConditinalStmt Branch \n NULLIFY(&a,false); [line 29]\n NULLIFY(&b,false); [line 29]\n DECLARE_LOCALS(&SIL_temp_conditional___36); [line 29]\n *&SIL_temp_conditional___36:int =1 [line 29]\n APPLY_ABSTRACTION; [line 29]\n " shape="box"]
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40 -> 36 ;
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39 [label="39: ConditinalStmt Branch \n NULLIFY(&a,false); [line 29]\n n$4=*&b:int [line 29]\n DECLARE_LOCALS(&SIL_temp_conditional___36); [line 29]\n *&SIL_temp_conditional___36:int =n$4 [line 29]\n REMOVE_TEMPS(n$4); [line 29]\n NULLIFY(&b,false); [line 29]\n APPLY_ABSTRACTION; [line 29]\n " shape="box"]
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39 -> 36 ;
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38 [label="38: Prune (false branch) \n n$3=*&a:int [line 29]\n PRUNE((n$3 == 0), false); [line 29]\n REMOVE_TEMPS(n$3); [line 29]\n " shape="invhouse"]
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38 -> 40 ;
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37 [label="37: Prune (true branch) \n n$3=*&a:int [line 29]\n PRUNE((n$3 != 0), true); [line 29]\n REMOVE_TEMPS(n$3); [line 29]\n " shape="invhouse"]
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37 -> 39 ;
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36 [label="36: + \n " ]
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36 -> 41 ;
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35 [label="35: Return Stmt \n n$0=*&r:int & [line 30]\n n$1=*n$0:int [line 30]\n *&return:int =(1 / n$1) [line 30]\n REMOVE_TEMPS(n$0,n$1); [line 30]\n NULLIFY(&r,false); [line 30]\n NULLIFY(&SIL_materialize_temp__n$2,false); [line 30]\n APPLY_ABSTRACTION; [line 30]\n " shape="box"]
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35 -> 34 ;
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34 [label="34: Exit div_temp_lvalue \n " color=yellow style=filled]
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33 [label="33: Start div_temp_lvalue\nFormals: a:int b:int \nLocals: r:int & SIL_materialize_temp__n$2:int \n DECLARE_LOCALS(&return,&r,&SIL_materialize_temp__n$2); [line 28]\n NULLIFY(&r,false); [line 28]\n " color=yellow style=filled]
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33 -> 37 ;
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33 -> 38 ;
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32 [label="32: DeclStmt \n *&v1:int =0 [line 23]\n " shape="box"]
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32 -> 31 ;
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31 [label="31: DeclStmt \n *&v2:int =0 [line 23]\n " shape="box"]
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31 -> 26 ;
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31 -> 27 ;
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30 [label="30: BinaryOperatorStmt: Assign \n n$2=*&SIL_temp_conditional___25:int & [line 24]\n NULLIFY(&SIL_temp_conditional___25,true); [line 24]\n *n$2:int =1 [line 24]\n REMOVE_TEMPS(n$2); [line 24]\n " shape="box"]
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30 -> 24 ;
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29 [label="29: ConditinalStmt Branch \n NULLIFY(&a,false); [line 24]\n DECLARE_LOCALS(&SIL_temp_conditional___25); [line 24]\n *&SIL_temp_conditional___25:int &=&v2 [line 24]\n APPLY_ABSTRACTION; [line 24]\n " shape="box"]
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29 -> 25 ;
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28 [label="28: ConditinalStmt Branch \n NULLIFY(&a,false); [line 24]\n DECLARE_LOCALS(&SIL_temp_conditional___25); [line 24]\n *&SIL_temp_conditional___25:int &=&v1 [line 24]\n APPLY_ABSTRACTION; [line 24]\n " shape="box"]
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28 -> 25 ;
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27 [label="27: Prune (false branch) \n n$1=*&a:int [line 24]\n PRUNE((n$1 == 0), false); [line 24]\n REMOVE_TEMPS(n$1); [line 24]\n " shape="invhouse"]
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27 -> 29 ;
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26 [label="26: Prune (true branch) \n n$1=*&a:int [line 24]\n PRUNE((n$1 != 0), true); [line 24]\n REMOVE_TEMPS(n$1); [line 24]\n " shape="invhouse"]
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26 -> 28 ;
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25 [label="25: + \n " ]
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25 -> 30 ;
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24 [label="24: Return Stmt \n n$0=*&v1:int [line 25]\n *&return:int =n$0 [line 25]\n REMOVE_TEMPS(n$0); [line 25]\n NULLIFY(&v1,false); [line 25]\n NULLIFY(&v2,false); [line 25]\n APPLY_ABSTRACTION; [line 25]\n " shape="box"]
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24 -> 23 ;
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23 [label="23: Exit assign_conditional \n " color=yellow style=filled]
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22 [label="22: Start assign_conditional\nFormals: a:int \nLocals: v2:int v1:int \n DECLARE_LOCALS(&return,&v2,&v1); [line 22]\n " color=yellow style=filled]
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22 -> 32 ;
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21 [label="21: DeclStmt \n *&v1:int =0 [line 17]\n " shape="box"]
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21 -> 16 ;
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21 -> 17 ;
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20 [label="20: DeclStmt \n n$3=*&SIL_temp_conditional___15:int [line 18]\n NULLIFY(&SIL_temp_conditional___15,true); [line 18]\n *&v3:int =n$3 [line 18]\n REMOVE_TEMPS(n$3); [line 18]\n " shape="box"]
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20 -> 14 ;
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19 [label="19: ConditinalStmt Branch \n NULLIFY(&a,false); [line 18]\n NULLIFY(&v1,false); [line 18]\n DECLARE_LOCALS(&SIL_temp_conditional___15); [line 18]\n *&SIL_temp_conditional___15:int =1 [line 18]\n APPLY_ABSTRACTION; [line 18]\n " shape="box"]
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19 -> 15 ;
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18 [label="18: ConditinalStmt Branch \n NULLIFY(&a,false); [line 18]\n n$2=*&v1:int [line 18]\n DECLARE_LOCALS(&SIL_temp_conditional___15); [line 18]\n *&SIL_temp_conditional___15:int =n$2 [line 18]\n REMOVE_TEMPS(n$2); [line 18]\n NULLIFY(&v1,false); [line 18]\n APPLY_ABSTRACTION; [line 18]\n " shape="box"]
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18 -> 15 ;
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17 [label="17: Prune (false branch) \n n$1=*&a:int [line 18]\n PRUNE((n$1 == 0), false); [line 18]\n REMOVE_TEMPS(n$1); [line 18]\n " shape="invhouse"]
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17 -> 19 ;
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16 [label="16: Prune (true branch) \n n$1=*&a:int [line 18]\n PRUNE((n$1 != 0), true); [line 18]\n REMOVE_TEMPS(n$1); [line 18]\n " shape="invhouse"]
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16 -> 18 ;
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15 [label="15: + \n " ]
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15 -> 20 ;
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14 [label="14: Return Stmt \n n$0=*&v3:int [line 19]\n *&return:int =n$0 [line 19]\n REMOVE_TEMPS(n$0); [line 19]\n NULLIFY(&v3,false); [line 19]\n APPLY_ABSTRACTION; [line 19]\n " shape="box"]
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14 -> 13 ;
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13 [label="13: Exit choose_rvalue \n " color=yellow style=filled]
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12 [label="12: Start choose_rvalue\nFormals: a:int \nLocals: v3:int v1:int \n DECLARE_LOCALS(&return,&v3,&v1); [line 16]\n NULLIFY(&v1,false); [line 16]\n NULLIFY(&v3,false); [line 16]\n " color=yellow style=filled]
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12 -> 21 ;
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11 [label="11: DeclStmt \n *&v1:int =0 [line 11]\n " shape="box"]
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11 -> 10 ;
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10 [label="10: DeclStmt \n *&v2:int =1 [line 11]\n " shape="box"]
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10 -> 5 ;
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10 -> 6 ;
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9 [label="9: DeclStmt \n n$2=*&SIL_temp_conditional___4:int & [line 12]\n NULLIFY(&SIL_temp_conditional___4,true); [line 12]\n n$3=*n$2:int [line 12]\n *&v3:int =n$3 [line 12]\n REMOVE_TEMPS(n$2,n$3); [line 12]\n " shape="box"]
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9 -> 3 ;
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8 [label="8: ConditinalStmt Branch \n NULLIFY(&a,false); [line 12]\n DECLARE_LOCALS(&SIL_temp_conditional___4); [line 12]\n *&SIL_temp_conditional___4:int &=&v2 [line 12]\n APPLY_ABSTRACTION; [line 12]\n " shape="box"]
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8 -> 4 ;
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7 [label="7: ConditinalStmt Branch \n NULLIFY(&a,false); [line 12]\n DECLARE_LOCALS(&SIL_temp_conditional___4); [line 12]\n *&SIL_temp_conditional___4:int &=&v1 [line 12]\n APPLY_ABSTRACTION; [line 12]\n " shape="box"]
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7 -> 4 ;
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6 [label="6: Prune (false branch) \n n$1=*&a:int [line 12]\n PRUNE((n$1 == 0), false); [line 12]\n REMOVE_TEMPS(n$1); [line 12]\n " shape="invhouse"]
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6 -> 8 ;
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5 [label="5: Prune (true branch) \n n$1=*&a:int [line 12]\n PRUNE((n$1 != 0), true); [line 12]\n REMOVE_TEMPS(n$1); [line 12]\n " shape="invhouse"]
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5 -> 7 ;
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4 [label="4: + \n " ]
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4 -> 9 ;
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3 [label="3: Return Stmt \n n$0=*&v3:int [line 13]\n *&return:int =n$0 [line 13]\n REMOVE_TEMPS(n$0); [line 13]\n NULLIFY(&v3,false); [line 13]\n NULLIFY(&v1,false); [line 13]\n NULLIFY(&v2,false); [line 13]\n APPLY_ABSTRACTION; [line 13]\n " shape="box"]
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3 -> 2 ;
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2 [label="2: Exit choose_lvalue \n " color=yellow style=filled]
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1 [label="1: Start choose_lvalue\nFormals: a:int \nLocals: v3:int v2:int v1:int \n DECLARE_LOCALS(&return,&v3,&v2,&v1); [line 10]\n NULLIFY(&v3,false); [line 10]\n " color=yellow style=filled]
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1 -> 11 ;
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}
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@ -0,0 +1,66 @@
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/*
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* Copyright (c) 2015 - present Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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package endtoend.cpp;
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import static org.hamcrest.MatcherAssert.assertThat;
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import static utils.matchers.ResultContainsExactly.containsExactly;
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import com.google.common.collect.ImmutableList;
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import org.junit.BeforeClass;
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import org.junit.ClassRule;
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import org.junit.Test;
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import java.io.IOException;
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import utils.DebuggableTemporaryFolder;
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import utils.InferException;
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import utils.InferResults;
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import utils.InferRunner;
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public class LValueConditionalTest {
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public static final String FILE =
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"infer/tests/codetoanalyze/cpp/frontend/conditional/lvalue_conditional.cpp";
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private static ImmutableList<String> inferCmd;
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public static final String DIVIDE_BY_ZERO = "DIVIDE_BY_ZERO";
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@ClassRule
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public static DebuggableTemporaryFolder folder =
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new DebuggableTemporaryFolder();
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@BeforeClass
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public static void runInfer() throws InterruptedException, IOException {
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inferCmd = InferRunner.createCPPInferCommand(folder, FILE);
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}
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@Test
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public void whenInferRunsOnDiv0MethodsErrorIsFound()
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throws InterruptedException, IOException, InferException {
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InferResults inferResults = InferRunner.runInferCPP(inferCmd);
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String[] procedures = {
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"div0_choose_lvalue",
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"div0_choose_rvalue",
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"div0_assign_conditional",
|
||||
"div0_temp_lvalue",
|
||||
};
|
||||
assertThat(
|
||||
"Results should contain the expected divide by zero",
|
||||
inferResults,
|
||||
containsExactly(
|
||||
DIVIDE_BY_ZERO,
|
||||
FILE,
|
||||
procedures
|
||||
)
|
||||
);
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,37 @@
|
||||
/*
|
||||
* Copyright (c) 2013 - present Facebook, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This source code is licensed under the BSD style license found in the
|
||||
* LICENSE file in the root directory of this source tree. An additional grant
|
||||
* of patent rights can be found in the PATENTS file in the same directory.
|
||||
*/
|
||||
|
||||
package frontend.cpp;
|
||||
|
||||
import org.junit.Rule;
|
||||
import org.junit.Test;
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
import utils.DebuggableTemporaryFolder;
|
||||
import utils.InferException;
|
||||
import utils.ClangFrontendUtils;
|
||||
|
||||
public class ConditionalTest {
|
||||
|
||||
String basePath = "infer/tests/codetoanalyze/cpp/frontend/conditional/";
|
||||
|
||||
@Rule
|
||||
public DebuggableTemporaryFolder folder = new DebuggableTemporaryFolder();
|
||||
|
||||
void frontendTest(String fileRelative) throws InterruptedException, IOException, InferException {
|
||||
ClangFrontendUtils.createAndCompareCppDotFiles(folder, basePath + fileRelative);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testInlineMethodDotFilesMatch()
|
||||
throws InterruptedException, IOException, InferException {
|
||||
frontendTest("lvalue_conditional.cpp");
|
||||
}
|
||||
}
|
||||
Loading…
Reference in new issue