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<p class="MsoNormal"><span lang="EN-US">Hello<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I build Clang FE as a shared library and link with other application. That application should never crash with any sources given for compilation.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have a test based on this one <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_gcc-2Dmirror_gcc_blob_master_gcc_testsuite_gcc.c-2Dtorture_compile_limits-2Dpointer.c&d=AwMFAg&c=8hUWFZcy2Z-Za5rBPlktOQ&r=CnzuN65ENJ1H9py9XLiRvC_UQz6u3oG6GUNn7_wosSM&m=hpvxMFBlQzY8zVAcA881WxdpWZy7JXsrFyztP55mXiE&s=LaLg0LQsuWIrH2wvu5UopsNZJsw4So5PLMOaUiVmdKY&e=">
https://github.com/gcc-mirror/gcc/blob/master/gcc/testsuite/gcc.c-torture/compile/limits-pointer.c</a> . But PTR4 is changed to PTR5 at the last line. I run the test with the following command line:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">clang.exe -c C:\work\tmp\limits-pointer.c<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Then clang crashed with stack overflow exception caused by very deep recursion during preprocessing. And that is not the only one case.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have noticed that there are many recursive calls in Clang’s source code. And depth of recursion in many cases depends on the source code which is being compiled.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is it possible to eliminate all such recursions in Clang?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If not, how can I workaround (if it is possible) stack overflow ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="mso-fareast-language:RU">Best regards.<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-US" style="mso-fareast-language:RU">Alexey Sotkin.<o:p></o:p></span></i></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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