Roman Lebedev c3b394ffba [InstCombine] dropRedundantMaskingOfLeftShiftInput(): propagate undef shift amounts ... Summary: When we do `ConstantExpr::getZExt()`, that "extends" `undef` to `0`, which means that for patterns a/b we'd assume that we must not produce any bits for that channel, while in reality we simply didn't care about that channel - i.e. we don't need to mask it. Reviewers: spatel Reviewed By: spatel Subscribers: hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D68239 llvm-svn: 373960		2019-10-07 20:52:52 +00:00
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CMakeLists.txt	[InstCombine] Optimize `atomicrmw <op>, 0` into `load atomic` when possible	2019-02-07 21:27:23 +00:00
InstCombineAddSub.cpp	[InstCombine] Deal with -(trunc(X >>u 63)) -> trunc(X >>s 63)	2019-10-01 17:50:20 +00:00
InstCombineAndOrXor.cpp	[InstCombine] foldUnsignedUnderflowCheck(): one last pattern with 'sub' (PR43251)	2019-09-25 22:59:59 +00:00
InstCombineAtomicRMW.cpp	[Alignment][NFC] Remove StoreInst::setAlignment(unsigned)	2019-10-03 13:17:21 +00:00
InstCombineCalls.cpp	[Alignment][NFC] Remove StoreInst::setAlignment(unsigned)	2019-10-03 13:17:21 +00:00
InstCombineCasts.cpp	[InstCombine] don't assume 'inbounds' for bitcast pointer to GEP transform (PR43501)	2019-10-06 13:08:08 +00:00
InstCombineCompares.cpp	[InstCombine] Fold 'icmp eq/ne (?trunc (lshr/ashr %x, bitwidth(x)-1)), 0' -> 'icmp sge/slt %x, 0'	2019-10-04 22:16:22 +00:00
InstCombineInternal.h	[InstCombine] Bypass high bit extract before variable sign-extension (PR43523)	2019-10-02 23:02:12 +00:00
InstCombineLoadStoreAlloca.cpp	[Alignment][NFC] Remove StoreInst::setAlignment(unsigned)	2019-10-03 13:17:21 +00:00
InstCombineMulDivRem.cpp	[InstCombine] fold fneg disguised as select+fmul (PR43497)	2019-10-06 14:15:48 +00:00
InstCombinePHI.cpp	[InstCombine] SliceUpIllegalIntegerPHI - bail on out of range shifts	2019-06-24 13:13:36 +00:00
InstCombineSelect.cpp	[InstCombine] allow icmp+binop folds before min/max bailout (PR43310)	2019-09-22 14:31:53 +00:00
InstCombineShifts.cpp	[InstCombine] dropRedundantMaskingOfLeftShiftInput(): propagate undef shift amounts	2019-10-07 20:52:52 +00:00
InstCombineSimplifyDemanded.cpp	[InstCombine][AMDGPU] Simplify tbuffer loads	2019-08-30 14:20:04 +00:00
InstCombineTables.td	InstCombine/AMDGPU: Add dimension-aware image intrinsics to SimplifyDemanded	2018-06-21 13:37:31 +00:00
InstCombineVectorOps.cpp	[InstCombine] fold extract+insert into identity shuffle	2019-09-08 19:03:01 +00:00
InstructionCombining.cpp	[InstCombine] Use m_Zero instead of isNullValue() when checking if a GEP index is all zeroes to prevent an infinite loop.	2019-09-26 17:20:50 +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