Adam Nemet 49f31255be [AVX512] Fix miscompile for unpack ... r189189 implemented AVX512 unpack by essentially performing a 256-bit unpack between the low and the high 256 bits of src1 into the low part of the destination and another unpack of the low and high 256 bits of src2 into the high part of the destination. I don't think that's how unpack works. AVX512 unpack simply has more 128-bit lanes but other than it works the same way as AVX. So in each 128-bit lane, we're always interleaving certain parts of both operands rather different parts of one of the operands. E.g. for this: __v16sf a = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }; __v16sf b = { 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 }; __v16sf c = __builtin_shufflevector(a, b, 0, 8, 1, 9, 4, 12, 5, 13, 16, 24, 17, 25, 20, 28, 21, 29); we generated punpcklps (notice how the elements of a and b are not interleaved in the shuffle). In turn, c was set to this: 0 16 1 17 4 20 5 21 8 24 9 25 12 28 13 29 Obviously this should have just returned the mask vector of the shuffle vector. I mostly reverted this change and made sure the original AVX code worked for 512-bit vectors as well. Also updated the tests because they matched the logic from the code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217602 91177308-0d34-0410-b5e6-96231b3b80d8		2014-09-11 16:51:10 +00:00
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CodeGen	[AVX512] Fix miscompile for unpack	2014-09-11 16:51:10 +00:00
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Instrumentation	[asan-assembly-instrumentation] Added CFI directives to the generated instrumentation code.	2014-09-10 09:45:49 +00:00
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Linker	Merge alignment of common GlobalValue.	2014-09-09 17:48:18 +00:00
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MC	Object: Add support for bigobj	2014-09-10 12:51:52 +00:00
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tools	Remember to eraseFromParent after replaceAllUsesWith.	2014-09-10 19:39:41 +00:00
Transforms	[AlignmentFromAssumptions] Don't crash just because the target is 32-bit	2014-09-11 08:40:17 +00:00
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CMakeLists.txt	Add LLVMgold target to test dependencies.	2014-09-10 22:20:49 +00:00
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