Simon Pilgrim f59c806c0f [VectorLegalizer] Expansion of CTLZ using CTPOP when possible ... This patch avoids scalarization of CTLZ by instead expanding to use CTPOP (ref: "Hacker's Delight") when the necessary operations are available. This also adds the necessary cost models for X86 SSE2 targets (the main beneficiary) to ensure vectorization only happens when its useful. Differential Revision: https://reviews.llvm.org/D25910 llvm-svn: 286233		2016-11-08 14:10:28 +00:00
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AArch64
AMDGPU
ARM	[TTI] The cost model should not assume vector casts get completely scalarized	2016-07-06 17:30:56 +00:00
PowerPC	[TTI] The cost model should not assume vector casts get completely scalarized	2016-07-06 17:30:56 +00:00
X86	[VectorLegalizer] Expansion of CTLZ using CTPOP when possible	2016-11-08 14:10:28 +00:00
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