Chris Lattner e27db74a60 improve switch formation to handle small range ... comparisons formed by comparisons. For example, this: void foo(unsigned x) { if (x == 0 || x == 1 || x == 3 || x == 4 || x == 6) bar(); } compiles into: _foo: ## @foo ## BB#0: ## %entry cmpl $6, %edi ja LBB0_2 ## BB#1: ## %entry movl %edi, %eax movl $91, %ecx btq %rax, %rcx jb LBB0_3 instead of: _foo: ## @foo ## BB#0: ## %entry cmpl $2, %edi jb LBB0_4 ## BB#1: ## %switch.early.test cmpl $6, %edi ja LBB0_3 ## BB#2: ## %switch.early.test movl %edi, %eax movl $88, %ecx btq %rax, %rcx jb LBB0_4 This catches a bunch of cases in GCC, which look like this: %804 = load i32* @which_alternative, align 4, !tbaa !0 %805 = icmp ult i32 %804, 2 %806 = icmp eq i32 %804, 3 %or.cond121 = or i1 %805, %806 %807 = icmp eq i32 %804, 4 %or.cond124 = or i1 %or.cond121, %807 br i1 %or.cond124, label %.thread, label %808 turning this into a range comparison. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122045 91177308-0d34-0410-b5e6-96231b3b80d8		2010-12-17 06:20:15 +00:00
..
ADT	Provide LiveIntervalUnion::Query::checkLoopInterference.	2010-12-17 04:09:47 +00:00
Analysis	Move Value::getUnderlyingObject to be a standalone	2010-12-15 20:02:24 +00:00
Assembly
Bitcode
CodeGen	Provide LiveIntervalUnion::Query::checkLoopInterference.	2010-12-17 04:09:47 +00:00
CompilerDriver
Config	Support/FileSystem: Fix MinGW build. It doesn't have _chsize_s.	2010-12-03 18:48:56 +00:00
ExecutionEngine
MC	MC/Mach-O: On second thought, use a custom hook for enabling aggressive	2010-12-17 05:50:29 +00:00
Object	Mach-O/ARM: Add relocation type enumeration.	2010-12-10 06:19:49 +00:00
Support	improve switch formation to handle small range	2010-12-17 06:20:15 +00:00
Target	MC/Target: Remove HasScatteredSymbols target hook variable, which has been	2010-12-17 02:06:08 +00:00
Transforms	remove the dead (and terrible) llvm::RemoveSuccessor function.	2010-12-14 06:51:55 +00:00
AbstractTypeUser.h
Argument.h
Attributes.h
AutoUpgrade.h
BasicBlock.h
CallGraphSCCPass.h
CallingConv.h	Adding target specific calling conventions to support the MBlaze GCC function	2010-12-15 20:14:09 +00:00
CMakeLists.txt
Constant.h
Constants.h	clarify comment	2010-12-03 01:11:13 +00:00
DerivedTypes.h
Function.h
GlobalAlias.h
GlobalValue.h
GlobalVariable.h
GVMaterializer.h
InitializePasses.h	Add MachineLoopRanges analysis.	2010-12-15 23:41:23 +00:00
InlineAsm.h
InstrTypes.h
Instruction.def
Instruction.h
Instructions.h	Fix paste-o in ExtractValueInst::getIndexedType() comments.	2010-12-03 14:54:33 +00:00
IntrinsicInst.h	remove the pointless check of MemoryUseIntrinsic from	2010-11-30 02:03:47 +00:00
Intrinsics.h
Intrinsics.td	Make @llvm.invariant.start not be readonly, so that it has side-effects. This	2010-11-30 04:13:41 +00:00
IntrinsicsAlpha.td
IntrinsicsARM.td	Add Neon VCVT instructions for f32 <-> f16 conversions.	2010-12-15 22:14:12 +00:00
IntrinsicsCellSPU.td
IntrinsicsPowerPC.td
IntrinsicsX86.td
IntrinsicsXCore.td
LinkAllPasses.h
LinkAllVMCore.h	Missed a spot removing Alarm.	2010-12-07 18:50:33 +00:00
Linker.h
LLVMContext.h
Metadata.h
Module.h
OperandTraits.h
Operator.h
Pass.h
PassAnalysisSupport.h
PassManager.h
PassManagers.h
PassRegistry.h
PassSupport.h
SymbolTableListTraits.h
Type.h
TypeSymbolTable.h
Use.h
User.h
Value.h	Move Value::getUnderlyingObject to be a standalone	2010-12-15 20:02:24 +00:00
ValueSymbolTable.h