Pierre Gousseau 1c56ea6dd5 [X86] Take advantage of the lzcnt instruction on btver2 architectures when ORing comparisons to zero. ... This change adds transformations such as: zext(or(setcc(eq, (cmp x, 0)), setcc(eq, (cmp y, 0)))) To: srl(or(ctlz(x), ctlz(y)), log2(bitsize(x)) This optimisation is beneficial on Jaguar architecture only, where lzcnt has a good reciprocal throughput. Other architectures such as Intel's Haswell/Broadwell or AMD's Bulldozer/PileDriver do not benefit from it. For this reason the change also adds a "HasFastLZCNT" feature which gets enabled for Jaguar. Differential Revision: https://reviews.llvm.org/D23446 llvm-svn: 284248		2016-10-14 16:41:38 +00:00
..
AArch64	[GlobalISel] Get the AArch64 tests to work on Linux	2016-10-14 10:19:40 +00:00
AMDGPU	AMDGPU: Select 64-bit {ADD,SUB}{C,E} nodes	2016-10-14 10:30:00 +00:00
ARM	Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."	2016-10-13 20:23:25 +00:00
AVR	[RegAllocGreedy] Attempt to split unspillable live intervals	2016-10-11 01:04:36 +00:00
BPF	Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."	2016-10-13 20:23:25 +00:00
Generic	llc: Add -start-before/-stop-before options	2016-09-23 21:46:02 +00:00
Hexagon	Handle lane masks in LivePhysRegs when adding live-ins	2016-10-12 22:53:41 +00:00
Inputs
Lanai
Mips	Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."	2016-10-13 20:23:25 +00:00
MIR	[MIRParser] Parse lane masks for register live-ins	2016-10-12 21:06:45 +00:00
MSP430	Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."	2016-10-13 20:23:25 +00:00
NVPTX	[NVPTX] Added intrinsics for atom.gen.{sys|cta}.* instructions.	2016-09-28 17:25:38 +00:00
PowerPC	Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."	2016-10-13 20:23:25 +00:00
SPARC	This pass, fixing an erratum in some LEON 2 processors ensures that the SDIV instruction is not issued, but replaced by SDIVcc instead, which does not exhibit the error. Unit test included.	2016-10-10 08:53:06 +00:00
SystemZ	Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."	2016-10-13 20:23:25 +00:00
Thumb	Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."	2016-10-13 20:23:25 +00:00
Thumb2	Re-land "[Thumb] Save/restore high registers in Thumb1 pro/epilogues"	2016-10-11 21:14:03 +00:00
WebAssembly	Codegen: Tail-duplicate during placement.	2016-10-11 20:36:43 +00:00
WinEH
X86	[X86] Take advantage of the lzcnt instruction on btver2 architectures when ORing comparisons to zero.	2016-10-14 16:41:38 +00:00
XCore	Revert "In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled."	2016-10-13 20:23:25 +00:00