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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">> clang -S test.c -o test.msa.mips.s --target=mips-pc-linux-gnu -mmsa -mfp64 -mfloat-abi=hard -mcpu=mips32 -fslp-vectorize-aggressive -fslp-vectorize-aggressive
-fslp-vectorize -fvectorize -fno-lax-vector-conversions -O3<br>
<br>
'-mcpu=mips32' should be '-mcpu=mips32r2' but even with that it doesn't vectorize your case. We haven't implemented TargetTransformInfo yet so we only get a very small amount of vectorization at the moment. As a quick experiment this afternoon, I tried a small
implementation that only reports the number of vector registers and their width. This seems to make a significant improvement to some of the tests in SingleSource/UnitTests/Vector but makes your test case considerably worse. We'll have to find time to implement
a proper TargetTransformInfo.<br>
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<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Also, you mentioned you were using clang 3.5 on another part of this thread. The 64-bit MIPS ABI's had a lot of bugs around that time, IIRC the majority of them
were fixed in 3.5.1 and a couple rarer ones were fixed in 3.5.2 and 3.6.0.<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"> Rail Shafigulin [rail@esenciatech.com]<br>
<b>Sent:</b> 14 March 2016 18:19<br>
<b>To:</b> Daniel Sanders<br>
<b>Cc:</b> Joerg Sonnenberger; llvm-dev<br>
<b>Subject:</b> Re: [llvm-dev] clang triple and clang target</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">On Mon, Mar 14, 2016 at 8:27 AM, Daniel Sanders <<a href="mailto:Daniel.Sanders@imgtec.com" target="_blank">Daniel.Sanders@imgtec.com</a>> wrote:<o:p></o:p></span></p>
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</span><span style="color:black">I need to see how they look, whether it is ARM, Mips or X86.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">The Mips triples you're most likely to need are:<o:p></o:p></span></p>
<p><span style="font-family:Symbol;color:black">·</span><span style="font-size:7.0pt;color:black">
</span><span style="color:black">mips-linux-gnu – 32-bit big-endian on GNU/Linux<o:p></o:p></span></p>
<p><span style="font-family:Symbol;color:black">·</span><span style="font-size:7.0pt;color:black">
</span><span style="color:black">mipsel-linux-gnu – 32-bit little-endian on GNU/Linux<o:p></o:p></span></p>
<p><span style="font-family:Symbol;color:black">·</span><span style="font-size:7.0pt;color:black">
</span><span style="color:black">mips64-linux-gnu – 64-bit big-endian on GNU/Linux<o:p></o:p></span></p>
<p><span style="font-family:Symbol;color:black">·</span><span style="font-size:7.0pt;color:black">
</span><span style="color:black">mips64el-linux-gnu – 64-bit little-endian on GNU/Linux<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">I should mention that Mips has quite a few triple-related bugs but if you're just looking at assembly the one you're most likely to encounter is that mips-*/mipsel-*
only work for 32-bit subtargets and mips64-*/mips64el-* only work for 64-bit subtargets. If you don't match them up correctly then you'll either get an assertion from the code generator or a crash. This isn't supposed to be the case but there's been some unfortunate
misunderstandings about GNU triples and Clang triples (they're not quite the same thing) that are difficult to resolve.<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Daniel,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Thanks for the response. I tried using the option you recommended but for some reason I didn't see any vector instructions in the output. Can you explain what am I doing wrong? Here is the command line I ran<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">clang -S test.c -o test.msa.mips.s --target=mips-pc-linux-gnu -mmsa -mfp64 -mfloat-abi=hard -mcpu=mips32 -fslp-vectorize-aggressive -fslp-vectorize-aggressive -fslp-vectorize -fvectorize -fno-lax-vector-conversions
-O3<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">I'm attaching test.c as well as test.msa.mips.s so you could see input as well as output.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Any help is appreciated.<o:p></o:p></span></p>
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