Sanjay Patel 3e05b40fd0 Refactor reciprocal square root estimate into target-independent function; NFC. ... This is purely a plumbing patch. No functional changes intended. The ultimate goal is to allow targets other than PowerPC (certainly X86 and Aarch64) to turn this: z = y / sqrt(x) into: z = y * rsqrte(x) using whatever HW magic they can use. See http://llvm.org/bugs/show_bug.cgi?id=20900 . The first step is to add a target hook for RSQRTE, take the already target-independent code selfishly hoarded by PPC, and put it into DAGCombiner. Next steps: The code in DAGCombiner::BuildRSQRTE() should be refactored further; tests that exercise that logic need to be added. Logic in PPCTargetLowering::BuildRSQRTE() should be hoisted into DAGCombiner. X86 and AArch64 overrides for TargetLowering.BuildRSQRTE() should be added. Differential Revision: http://reviews.llvm.org/D5425 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218219 91177308-0d34-0410-b5e6-96231b3b80d8		2014-09-21 15:19:15 +00:00
..
CostTable.h
Target.td
TargetCallingConv.h
TargetCallingConv.td
TargetFrameLowering.h
TargetInstrInfo.h
TargetIntrinsicInfo.h
TargetItinerary.td
TargetLibraryInfo.h
TargetLowering.h	Refactor reciprocal square root estimate into target-independent function; NFC.	2014-09-21 15:19:15 +00:00
TargetLoweringObjectFile.h
TargetMachine.h	Add a new pass FunctionTargetTransformInfo. This pass serves as a	2014-09-18 00:34:14 +00:00
TargetOpcodes.h
TargetOptions.h
TargetRegisterInfo.h
TargetSchedule.td
TargetSelectionDAG.td
TargetSelectionDAGInfo.h
TargetSubtargetInfo.h