David Bolvansky dbcdad51ff [InstCombine] (1 << (C - x)) -> ((1 << C) >> x) if C is bitwidth - 1 ... Summary: ``` %a = sub i32 31, %x %r = shl i32 1, %a => %d = shl i32 1, 31 %r = lshr i32 %d, %x Done: 1 Optimization is correct! ``` https://rise4fun.com/Alive/btZm Reviewers: spatel, lebedev.ri, nikic Reviewed By: lebedev.ri Subscribers: llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D63652 llvm-svn: 364073		2019-06-21 16:25:32 +00:00
..
CMakeLists.txt	[InstCombine] Optimize `atomicrmw <op>, 0` into `load atomic` when possible	2019-02-07 21:27:23 +00:00
InstCombineAddSub.cpp	[InstCombine] Handle -(X-Y) --> (Y-X) for unary fneg when NSZ	2019-06-11 16:21:21 +00:00
InstCombineAndOrXor.cpp	[InstCombine] try harder to form rotate (funnel shift) (PR20750)	2019-05-13 17:28:19 +00:00
InstCombineAtomicRMW.cpp	[InstCombine] Extend saturating idempotent atomicrmw transform to FP	2019-03-01 19:50:36 +00:00
InstCombineCalls.cpp	[InstCombine] cttz(abs(x)) -> cttz(x)	2019-06-21 15:26:22 +00:00
InstCombineCasts.cpp	[InstCombine] Update fptrunc (fneg x)) -> (fneg (fptrunc x) for unary FNeg	2019-06-11 15:45:41 +00:00
InstCombineCompares.cpp	[InstCombine] fix typo in comment; NFC	2019-06-20 20:23:32 +00:00
InstCombineInternal.h	[InstCombine] Refactor OptimizeOverflowCheck; NFCI	2019-05-26 11:43:37 +00:00
InstCombineLoadStoreAlloca.cpp	Use the DataLayout::typeSizeEqualsStoreSize helper. NFC	2019-05-24 09:20:20 +00:00
InstCombineMulDivRem.cpp	[InstCombine] canonicalize fdiv after fmul if reassociation is allowed	2019-04-15 13:23:38 +00:00
InstCombinePHI.cpp	[opaque pointer types] Pass value type to LoadInst creation.	2019-02-01 20:44:24 +00:00
InstCombineSelect.cpp	[InstCombine] allow unordered preds when canonicalizing to fabs()	2019-06-10 15:39:00 +00:00
InstCombineShifts.cpp	[InstCombine] (1 << (C - x)) -> ((1 << C) >> x) if C is bitwidth - 1	2019-06-21 16:25:32 +00:00
InstCombineSimplifyDemanded.cpp	[IntrinsicEmitter] Extend argument overloading with forward references.	2019-06-13 08:19:33 +00:00
InstCombineTables.td	InstCombine/AMDGPU: Add dimension-aware image intrinsics to SimplifyDemanded	2018-06-21 13:37:31 +00:00
InstCombineVectorOps.cpp	[InstCombine] prevent crashing with invalid extractelement index	2019-05-26 14:03:50 +00:00
InstructionCombining.cpp	[InstCombine] Factor out unreachable inst idiom creation [NFC]	2019-04-17 17:37:58 +00:00
LLVMBuild.txt	Update the file headers across all of the LLVM projects in the monorepo	2019-01-19 08:50:56 +00:00