diff options
Diffstat (limited to 'clang/lib/CodeGen/CGCleanup.h')
-rw-r--r-- | clang/lib/CodeGen/CGCleanup.h | 57 |
1 files changed, 1 insertions, 56 deletions
diff --git a/clang/lib/CodeGen/CGCleanup.h b/clang/lib/CodeGen/CGCleanup.h index c73c971..03e4a29 100644 --- a/clang/lib/CodeGen/CGCleanup.h +++ b/clang/lib/CodeGen/CGCleanup.h @@ -16,11 +16,8 @@ #include "EHScopeStack.h" #include "Address.h" -#include "llvm/ADT/STLExtras.h" -#include "llvm/ADT/SetVector.h" #include "llvm/ADT/SmallPtrSet.h" #include "llvm/ADT/SmallVector.h" -#include "llvm/IR/Instruction.h" namespace llvm { class BasicBlock; @@ -269,51 +266,6 @@ class alignas(8) EHCleanupScope : public EHScope { }; mutable struct ExtInfo *ExtInfo; - /// Erases auxillary allocas and their usages for an unused cleanup. - /// Cleanups should mark these allocas as 'used' if the cleanup is - /// emitted, otherwise these instructions would be erased. - struct AuxillaryAllocas { - SmallVector<llvm::Instruction *, 1> AuxAllocas; - bool used = false; - - // Records a potentially unused instruction to be erased later. - void Add(llvm::AllocaInst *Alloca) { AuxAllocas.push_back(Alloca); } - - // Mark all recorded instructions as used. These will not be erased later. - void MarkUsed() { - used = true; - AuxAllocas.clear(); - } - - ~AuxillaryAllocas() { - if (used) - return; - llvm::SetVector<llvm::Instruction *> Uses; - for (auto *Inst : llvm::reverse(AuxAllocas)) - CollectUses(Inst, Uses); - // Delete uses in the reverse order of insertion. - for (auto *I : llvm::reverse(Uses)) - I->eraseFromParent(); - } - - private: - void CollectUses(llvm::Instruction *I, - llvm::SetVector<llvm::Instruction *> &Uses) { - if (!I || !Uses.insert(I)) - return; - for (auto *User : I->users()) - CollectUses(cast<llvm::Instruction>(User), Uses); - } - }; - mutable struct AuxillaryAllocas *AuxAllocas; - - AuxillaryAllocas &getAuxillaryAllocas() { - if (!AuxAllocas) { - AuxAllocas = new struct AuxillaryAllocas(); - } - return *AuxAllocas; - } - /// The number of fixups required by enclosing scopes (not including /// this one). If this is the top cleanup scope, all the fixups /// from this index onwards belong to this scope. @@ -346,7 +298,7 @@ public: EHScopeStack::stable_iterator enclosingEH) : EHScope(EHScope::Cleanup, enclosingEH), EnclosingNormal(enclosingNormal), NormalBlock(nullptr), - ActiveFlag(Address::invalid()), ExtInfo(nullptr), AuxAllocas(nullptr), + ActiveFlag(Address::invalid()), ExtInfo(nullptr), FixupDepth(fixupDepth) { CleanupBits.IsNormalCleanup = isNormal; CleanupBits.IsEHCleanup = isEH; @@ -360,15 +312,8 @@ public: } void Destroy() { - if (AuxAllocas) - delete AuxAllocas; delete ExtInfo; } - void AddAuxAllocas(llvm::SmallVector<llvm::AllocaInst *> Allocas) { - for (auto *Alloca : Allocas) - getAuxillaryAllocas().Add(Alloca); - } - void MarkEmitted() { getAuxillaryAllocas().MarkUsed(); } // Objects of EHCleanupScope are not destructed. Use Destroy(). ~EHCleanupScope() = delete; |