Benjamin Kramer 0baa94a13b InstCombine: Turn icmp + sext into bitwise/integer ops when the input has only one unknown bit. ... int test1(unsigned x) { return (x&8) ? 0 : -1; } int test3(unsigned x) { return (x&8) ? -1 : 0; } before (x86_64): _test1: andl $8, %edi cmpl $1, %edi sbbl %eax, %eax ret _test3: andl $8, %edi cmpl $1, %edi sbbl %eax, %eax notl %eax ret after: _test1: shrl $3, %edi andl $1, %edi leal -1(%rdi), %eax ret _test3: shll $28, %edi movl %edi, %eax sarl $31, %eax ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128732 91177308-0d34-0410-b5e6-96231b3b80d8		2011-04-01 20:09:10 +00:00
..
ADCE
ArgumentPromotion
BlockPlacement
BranchFolding
CodeExtractor
CodeGenPrepare
ConstantMerge
ConstProp	Constant folding support for calls to umul.with.overflow(), basically identical to the smul.with.overflow() code.	2011-03-27 14:26:13 +00:00
CorrelatedValuePropagation
DeadArgElim
DeadStoreElimination	* The DSE code that tested for overlapping needed to take into account the fact	2011-03-30 21:37:19 +00:00
EarlyCSE
FunctionAttrs
GlobalDCE
GlobalOpt	Add an optimization to GlobalOpt that eliminates calls to __cxa_atexit, if the function passed is empty.	2011-03-20 17:59:11 +00:00
GVN
IndVarSimplify	Avoid creating canonical induction variables for non-native types.	2011-03-18 16:50:32 +00:00
Inline
InstCombine	InstCombine: Turn icmp + sext into bitwise/integer ops when the input has only one unknown bit.	2011-04-01 20:09:10 +00:00
InstSimplify
Internalize
IPConstantProp
JumpThreading
LCSSA	Do not add PHIs with no users when creating LCSSA form. Patch by Andrew Clinton.	2011-03-15 07:41:25 +00:00
LICM
LoopDeletion
LoopIdiom
LoopRotate
LoopSimplify	Avoid creating canonical induction variables for non-native types.	2011-03-18 16:50:32 +00:00
LoopStrengthReduce	Avoid creating canonical induction variables for non-native types.	2011-03-18 16:50:32 +00:00
LoopUnroll
LoopUnswitch
LowerAtomic
LowerInvoke
LowerSetJmp
LowerSwitch
Mem2Reg
MemCpyOpt
MergeFunc
PruneEH
Reassociate
ScalarRepl	Do some simple copy propagation through integer loads and stores when promoting	2011-03-29 05:19:52 +00:00
SCCP
SimplifyCFG	PR9450: Make switch optimization in SimplifyCFG not dependent on the ordering	2011-03-15 02:23:35 +00:00
SimplifyLibCalls
Sink
SRETPromotion
StripSymbols
TailCallElim
TailDup