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Simon Pilgrim 73aea916e6 [X86][AVX2] Fix v16i16 SHL lowering (PR27730)
The AVX2 v16i16 shift lowering works by unpacking to 2 x v8i32, performing the shift and then truncating the result.

The unpacking is used to place the values in the upper 16-bits so that we can correctly sign-extend for SRA shifts. Unfortunately we weren't ensuring that the lower 16-bits were zero to ensure that SHL correctly shifts in zero bits.

llvm-svn: 271796
2016-06-04 16:45:33 +00:00
2016-01-26 21:29:08 +00:00
2014-04-07 03:57:04 +00:00
2014-03-02 13:08:46 +00:00
2016-01-26 21:29:08 +00:00
2016-05-10 16:23:54 +00:00
2016-03-30 22:41:06 +00:00
2016-01-04 19:13:29 +00:00

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