Craig Topper 6b1b630a98 [SelectionDAG] Use known ones to provide a better bound for the known zeros for CTTZ/CTLZ operations. ... This is the SelectionDAG version of D32521. If know where at least one 1 is located in the input to these intrinsics we can place an upper bound on the number of bits needed to represent the count and thus increase the number of known zeros in the output. I think we can also refine this further for CTTZ_UNDEF/CTLZ_UNDEF by assuming that the answer will never be BitWidth. I've left this out for now because it caused other test failures across multiple targets. Usually because of turning ADD into OR based on this new information. I'll fix CTPOP in a future patch. Differential Revision: https://reviews.llvm.org/D32692 llvm-svn: 301806		2017-05-01 16:08:06 +00:00
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AArch64	[StackMaps] Increase the size of the "location size" field	2017-04-28 04:48:42 +00:00
AMDGPU	AMDGPU: Fix copies from physical registers in SIFixSGPRCopies	2017-04-29 01:26:34 +00:00
ARM	[ARM] GlobalISel: Tighten test. NFC	2017-04-28 07:50:47 +00:00
AVR	[AVR] Implement non-constant bit rotations	2017-05-01 09:48:55 +00:00
BPF	[bpf] add bigendian support to disassembler	2017-04-28 16:51:01 +00:00
Generic	[Hexagon] Unxfail passing tests	2017-04-13 16:05:35 +00:00
Hexagon	[RDF] Correctly calculate lane masks for defs	2017-04-28 21:57:53 +00:00
Inputs	…
Lanai	…
MIR	MIR: Allow parsing of empty machine functions	2017-04-11 19:32:41 +00:00
MSP430	[MSP430] Fix PR32769: Select8 and Select16 need to have SR in Uses.	2017-04-26 00:33:59 +00:00
Mips	[mips][microMIPS] Adding code size reduction pass for MicroMIPS	2017-04-27 13:10:48 +00:00
NVPTX	Add address space mangling to lifetime intrinsics	2017-04-10 20:18:21 +00:00
PowerPC	[StackMaps] Increase the size of the "location size" field	2017-04-28 04:48:42 +00:00
SPARC	Don't emit CFI instructions at the end of a function	2017-04-24 18:45:59 +00:00
SystemZ	[SystemZ] Update kill-flag in splitMove().	2017-04-24 12:40:28 +00:00
Thumb	[ARM] ScheduleDAGRRList::DelayForLiveRegsBottomUp must consider OptionalDefs	2017-04-23 06:58:08 +00:00
Thumb2	Add address space mangling to lifetime intrinsics	2017-04-10 20:18:21 +00:00
WebAssembly	[WebAssembly] Fix WebAssemblyOptimizeReturned after r300367	2017-04-17 21:40:28 +00:00
WinEH	…
X86	[SelectionDAG] Use known ones to provide a better bound for the known zeros for CTTZ/CTLZ operations.	2017-05-01 16:08:06 +00:00
XCore	In visitSTORE, always use FindBetterChain, rather than only when UseAA is enabled.	2017-03-14 00:34:14 +00:00