d3f0d03cc5
[X86][AVX1] Account for cost of extract/insert of 256-bit SDIV/UDIV by mul sequences
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llvm-svn: 303017
2017-05-14 18:52:15 +00:00
365be4f95c
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv uniformconst costs for 256/512 bit integer vectors
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We weren't checking for uniform const costs before the general cost, resulting in very high estimates.
llvm-svn: 284755
2016-10-20 18:00:35 +00:00
1388c0acc1
[CostModel][X86] Added tests for sdiv/udiv costs for uniform const and uniform const power-of-2
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Shows poor costings in AVX1/AVX512BW for certain vector types
llvm-svn: 284748
2016-10-20 17:16:38 +00:00
025e26dd32
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv general costs for 256/512 bit integer vectors
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We weren't accounting for legal types on every subtarget, meaning that many of the costs were using defaults.
We still don't correctly cost (or test) the 512-bit sdiv/udiv by uniform const cases, nor the power-of-2 cases.
llvm-svn: 284744
2016-10-20 16:39:11 +00:00
16cc616ebc
[CostModel][X86] Added tests for sdiv/udiv costs for scalar and 128/256/512 bit integer vectors
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Shows current bug in AVX1/AVX512BW costs for 256 bit vector types
llvm-svn: 284723
2016-10-20 12:34:00 +00:00
a04b9ef1e8
X86 cost model: Vectorizing integer division is a bad idea
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radar://14057959
llvm-svn: 184872
2013-06-25 19:14:09 +00:00
Simon Pilgrim