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a2ec1d8ec2
This PR implements the function splitBasicBlockBefore to address an
issue
that occurred during SplitEdge(BB, Succ, ...), inside splitBlockBefore.
The issue occurs in SplitEdge when the Succ has a single predecessor
and the edge between the BB and Succ is not critical. This produces
the result ‘BB->Succ->New’. The new function splitBasicBlockBefore
was added to splitBlockBefore to handle the issue and now produces
the correct result ‘BB->New->Succ’.
Below is an example of splitting the block bb1 at its first instruction.
/// Original IR
bb0:
br bb1
bb1:
%0 = mul i32 1, 2
br bb2
bb2:
/// IR after splitEdge(bb0, bb1) using splitBasicBlock
bb0:
br bb1
bb1:
br bb1.split
bb1.split:
%0 = mul i32 1, 2
br bb2
bb2:
/// IR after splitEdge(bb0, bb1) using splitBasicBlockBefore
bb0:
br bb1.split
bb1.split
br bb1
bb1:
%0 = mul i32 1, 2
br bb2
bb2:
Differential Revision: https://reviews.llvm.org/D92200
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| .. | ||
| AbstractCallSite.h | ||
| Argument.h | ||
| AssemblyAnnotationWriter.h | ||
| Assumptions.h | ||
| Attributes.h | ||
| Attributes.td | ||
| AutoUpgrade.h | ||
| BasicBlock.h | ||
| CallingConv.h | ||
| CFG.h | ||
| CMakeLists.txt | ||
| Comdat.h | ||
| Constant.h | ||
| ConstantFolder.h | ||
| ConstantRange.h | ||
| Constants.h | ||
| ConstrainedOps.def | ||
| DataLayout.h | ||
| DebugInfo.h | ||
| DebugInfoFlags.def | ||
| DebugInfoMetadata.h | ||
| DebugLoc.h | ||
| DerivedTypes.h | ||
| DerivedUser.h | ||
| DiagnosticHandler.h | ||
| DiagnosticInfo.h | ||
| DiagnosticPrinter.h | ||
| DIBuilder.h | ||
| Dominators.h | ||
| FixedMetadataKinds.def | ||
| FixedPointBuilder.h | ||
| FPEnv.h | ||
| Function.h | ||
| GetElementPtrTypeIterator.h | ||
| GlobalAlias.h | ||
| GlobalIFunc.h | ||
| GlobalIndirectSymbol.h | ||
| GlobalObject.h | ||
| GlobalValue.h | ||
| GlobalVariable.h | ||
| GVMaterializer.h | ||
| InlineAsm.h | ||
| InstIterator.h | ||
| InstrTypes.h | ||
| Instruction.def | ||
| Instruction.h | ||
| Instructions.h | ||
| InstVisitor.h | ||
| IntrinsicInst.h | ||
| Intrinsics.h | ||
| Intrinsics.td | ||
| IntrinsicsAArch64.td | ||
| IntrinsicsAMDGPU.td | ||
| IntrinsicsARM.td | ||
| IntrinsicsBPF.td | ||
| IntrinsicsHexagon.td | ||
| IntrinsicsHexagonDep.td | ||
| IntrinsicsMips.td | ||
| IntrinsicsNVVM.td | ||
| IntrinsicsPowerPC.td | ||
| IntrinsicsRISCV.td | ||
| IntrinsicsSystemZ.td | ||
| IntrinsicsVE.td | ||
| IntrinsicsVEVL.gen.td | ||
| IntrinsicsWebAssembly.td | ||
| IntrinsicsX86.td | ||
| IntrinsicsXCore.td | ||
| IRBuilder.h | ||
| IRBuilderFolder.h | ||
| IRPrintingPasses.h | ||
| LegacyPassManager.h | ||
| LegacyPassManagers.h | ||
| LegacyPassNameParser.h | ||
| LLVMContext.h | ||
| LLVMRemarkStreamer.h | ||
| Mangler.h | ||
| MatrixBuilder.h | ||
| MDBuilder.h | ||
| Metadata.def | ||
| Metadata.h | ||
| Module.h | ||
| ModuleSlotTracker.h | ||
| ModuleSummaryIndex.h | ||
| ModuleSummaryIndexYAML.h | ||
| NoFolder.h | ||
| OperandTraits.h | ||
| Operator.h | ||
| OptBisect.h | ||
| PassInstrumentation.h | ||
| PassManager.h | ||
| PassManagerImpl.h | ||
| PassManagerInternal.h | ||
| PassTimingInfo.h | ||
| PatternMatch.h | ||
| PredIteratorCache.h | ||
| PrintPasses.h | ||
| ProfileSummary.h | ||
| PseudoProbe.h | ||
| RuntimeLibcalls.def | ||
| SafepointIRVerifier.h | ||
| Statepoint.h | ||
| StructuralHash.h | ||
| SymbolTableListTraits.h | ||
| TrackingMDRef.h | ||
| Type.h | ||
| TypeFinder.h | ||
| Use.h | ||
| UseListOrder.h | ||
| User.h | ||
| Value.def | ||
| Value.h | ||
| ValueHandle.h | ||
| ValueMap.h | ||
| ValueSymbolTable.h | ||
| Verifier.h | ||
| VPIntrinsics.def | ||