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- Change register allocation hint to a pair of unsigned integers. The hint type is zero (which means prefer the register specified as second part of the pair) or entirely target dependent. - Allow targets to specify alternative register allocation orders based on allocation hint. Part 2. - Use the register allocation hint system to implement more aggressive load / store multiple formation. - Aggressively form LDRD / STRD. These are formed *before* register allocation. It has to be done this way to shorten live interval of base and offset registers. e.g. v1025 = LDR v1024, 0 v1026 = LDR v1024, 0 => v1025,v1026 = LDRD v1024, 0 If this transformation isn't done before allocation, v1024 will overlap v1025 which means it more difficult to allocate a register pair. - Even with the register allocation hint, it may not be possible to get the desired allocation. In that case, the post-allocation load / store multiple pass must fix the ldrd / strd instructions. They can either become ldm / stm instructions or back to a pair of ldr / str instructions. This is work in progress, not yet enabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73381 91177308-0d34-0410-b5e6-96231b3b80d8 |
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ADT | ||
Analysis | ||
Assembly | ||
Bitcode | ||
CodeGen | ||
CompilerDriver | ||
Config | ||
Debugger | ||
ExecutionEngine | ||
Support | ||
System | ||
Target | ||
Transforms | ||
AbstractTypeUser.h | ||
Argument.h | ||
Attributes.h | ||
AutoUpgrade.h | ||
BasicBlock.h | ||
CallGraphSCCPass.h | ||
CallingConv.h | ||
CMakeLists.txt | ||
Constant.h | ||
Constants.h | ||
DerivedTypes.h | ||
Function.h | ||
GlobalAlias.h | ||
GlobalValue.h | ||
GlobalVariable.h | ||
InlineAsm.h | ||
InstrTypes.h | ||
Instruction.def | ||
Instruction.h | ||
Instructions.h | ||
IntrinsicInst.h | ||
Intrinsics.h | ||
Intrinsics.td | ||
IntrinsicsAlpha.td | ||
IntrinsicsARM.td | ||
IntrinsicsCellSPU.td | ||
IntrinsicsPowerPC.td | ||
IntrinsicsX86.td | ||
IntrinsicsXCore.td | ||
LinkAllPasses.h | ||
LinkAllVMCore.h | ||
Linker.h | ||
MDNode.h | ||
Module.h | ||
ModuleProvider.h | ||
OperandTraits.h | ||
Pass.h | ||
PassAnalysisSupport.h | ||
PassManager.h | ||
PassManagers.h | ||
PassSupport.h | ||
SymbolTableListTraits.h | ||
Type.h | ||
TypeSymbolTable.h | ||
Use.h | ||
User.h | ||
Value.h | ||
ValueSymbolTable.h |