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<p class="MsoNormal"><span style="font-family:"Courier New";color:black">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black">I just submitted a bug report with a package containing 107 small test cases that fail on the latest LLVM/clang 3.4 main trunk (184563). Included are test sources, compilation commands,
test input files, and results at –O0 and –O2 when applicable.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black"><a href="http://llvm.org/bugs/show_bug.cgi?id=16431">http://llvm.org/bugs/show_bug.cgi?id=16431</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span style="font-size:12.0pt;font-family:"Courier New";color:black">These tests have been automatically generated by an internal tool at Intel, the Intel Compiler fuzzer, icFuzz. The tests are typically very small. For example, for
the</span><span style="font-size:12.0pt;font-family:"Courier New""> following simple loop (test t5702) on MacOS X, clang at –O2 generates a binary that crashes:<o:p></o:p></span></p>
<p class="MsoPlainText"><span style="font-size:12.0pt;font-family:"Courier New""><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:green">// Test Loop Interchange<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New";color:blue">for</span><span style="font-size:10.0pt;font-family:"Courier New""> (j = 2; j < 76; j++) {<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New"">
<span style="color:blue">for</span> (jm = 1; jm < 30; jm++) {<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New""> h[j-1][jm-1] = j + 83;<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New""> }<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;font-family:"Courier New"">}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black">The tests are put in to two categories
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black">- tests that have different runtime outputs when compiled at -O0 and -O2 (this category also includes runtime crashes)
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black">- tests that cause infinite loops in the Clang optimizer
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black">Many of these failing tests could be due to the same bug, thus a much smaller number of root problems are expected.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black">Any help with triaging these bugs would be highly appreciated.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:black">-moh</span><span style="font-family:"Courier New""><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></p>
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