[ https://issues.apache.org/jira/browse/STDCXX-248?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Farid Zaripov reassigned STDCXX-248: ------------------------------------ Assignee: Farid Zaripov > [Intel C++ 9.1/Windows] bad codegen initializing const POD struct > ----------------------------------------------------------------- > > Key: STDCXX-248 > URL: https://issues.apache.org/jira/browse/STDCXX-248 > Project: C++ Standard Library > Issue Type: Bug > Components: External > Affects Versions: 4.1.3 > Environment: Intel C++ 9.1, Windows > Reporter: Farid Zaripov > Assignee: Farid Zaripov > Priority: Minor > > The program below is expected to run without assert. When compiled with Intel > C++ 9.1 on Windows, it's terminated with runtime error instead. Note that > MSVC++ 7.1 behaves as expected. > ====================================================================== > #include <cassert> > struct UserChar > { > long double f; > unsigned char c; > }; > struct UserInt > { > int i_; > UserChar to_char () const > { > const UserChar tmp = { 0, i_ }; > return tmp; > } > UserChar to_char2 () const > { > UserChar tmp = { 0, i_ }; > return tmp; > } > UserChar to_char3 () const > { > UserChar tmp = { 0 }; > tmp.c = i_; > return tmp; > } > }; > int main(int argc, char* argv[]) > { > const char TEST_CHAR = 'a'; > UserInt ui = { TEST_CHAR }; > UserChar uc = ui.to_char (); > UserChar uc2 = ui.to_char2 (); > UserChar uc3 = ui.to_char3 (); > assert (TEST_CHAR == uc.c && TEST_CHAR == uc2.c && TEST_CHAR == uc3.c); > return 0; > } > ====================================================================== > icl icl91_test.cpp > Intel(R) C++ Compiler for 32-bit applications, Version 9.1 Build 20060323Z > Copyright (C) 1985-2006 Intel Corporation. All rights reserved. > icl91_test.cpp > Microsoft (R) Incremental Linker Version 7.10.3077 > Copyright (C) Microsoft Corporation. All rights reserved. > -out:icl91_test.exe > icl91_test.obj > ====================================================================== > icl91_test.exe > Assertion failed: TEST_CHAR == uc.c && TEST_CHAR == uc2.c && TEST_CHAR == > uc3.c, > file icl91_test.cpp, line 43 > This application has requested the Runtime to terminate it in an unusual way. > Please contact the application's support team for more information. > ====================================================================== > Generated assembler code: > UserChar to_char () const > 00439A44 push ebp > 00439A45 mov ebp,esp > 00439A47 push esi > 00439A48 mov dword ptr [ebp-4],ecx > const UserChar tmp = { 0, i_ }; > 00439A4B fldz > 00439A4D mov eax,dword ptr [ebp+8] > 00439A50 fstp qword ptr [eax] > return tmp; > 00439A52 mov eax,dword ptr [ebp+8] > 00439A55 leave > 00439A56 ret 4 > tmp.c is not initialized by value this->i_ and as a result it contains a > random value. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.