You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@stdcxx.apache.org by "Farid Zaripov (JIRA)" <ji...@apache.org> on 2007/08/27 20:15:30 UTC
[jira] Assigned: (STDCXX-248) [Intel C++ 9.1/Windows] bad codegen
initializing const POD struct
[ 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.