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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">(Remembering to add llvm-dev this time…)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If you look at the argc/argv for the "2: compiler" case, the first option should be "-cc1" which will cause the driver to dispatch to cc1_main(), which is in
cc1_main.cpp.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--paulr<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> llvm-dev [mailto:llvm-dev-bounces@lists.llvm.org]
<b>On Behalf Of </b>Rob bor78 via llvm-dev<br>
<b>Sent:</b> Thursday, July 05, 2018 10:25 AM<br>
<b>To:</b> llvm-dev@lists.llvm.org<br>
<b>Subject:</b> [llvm-dev] Where is the code that is called when clang calls the job which generates IR?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif"">Where is the source code that is called when the clang binary executable calls the command/job which compiles C code to IR?</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:black"><br>
I am using Clang as a library (basically a simplified version of the main function in /tools/clang/tools/driver/driver.cpp). <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:black">My program creates an instance of clang::driver::Driver. I pass arguments to TheDriver.BuildCompilation(args)). And then call ExecuteCompilation. Everything works.<br>
<br>
When I call TheDriver.PrintActions(*C) the output is<br>
<br>
0: input, "testcode.cpp", c++<br>
1: preprocessor, {0}, c++-cpp-output<br>
2: compiler, {1}, ir<br>
3: backend, {2}, assembler<br>
4: assembler, {3}, object<br>
5: linker, {4}, image<br>
<br>
And when I loop over the jobs inside the Compilation object I see that the clang binary executable is called 4 times (using execve) and finally ld.lld is called.<br>
<br>
I'm interested in the call to clang for "2: compiler, {1}, ir". <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif";color:black">Is /tools/clang/tools/driver/driver.cpp called again? It seems that the main function in driver.cpp eventually calls itself again. If not what is called, and where is the source
code?<o:p></o:p></span></p>
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