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Added function GetMemInstArgs and made FoldGetElemChain private.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3503 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2002-08-24 21:03:10 +00:00
parent 2730a38485
commit df3fe55e57
1 changed files with 15 additions and 6 deletions
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21
include/llvm/CodeGen/InstrSelectionSupport.h
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@ -37,16 +37,25 @@ int64_t GetConstantValueAsSignedInt (const Value *V,
//---------------------------------------------------------------------------
// Function: FoldGetElemChain
// Function: GetMemInstArgs
//
// Purpose:
// Fold a chain of GetElementPtr instructions into an equivalent
// (Pointer, IndexVector) pair. Returns the pointer Value, and
// stores the resulting IndexVector in argument chainIdxVec.
// Get the pointer value and the index vector for a memory operation
// (GetElementPtr, Load, or Store). If all indices of the given memory
// operation are constant, fold in constant indices in a chain of
// preceding GetElementPtr instructions (if any), and return the
// pointer value of the first instruction in the chain.
// All folded instructions are marked so no code is generated for them.
//
// Return values:
// Returns the pointer Value to use.
// Returns the resulting IndexVector in idxVec.
// Returns true/false in allConstantIndices if all indices are/aren't const.
//---------------------------------------------------------------------------
Value* FoldGetElemChain (const InstructionNode* getElemInstrNode,
std::vector<Value*>& chainIdxVec);
Value* GetMemInstArgs (const InstructionNode* memInstrNode,
vector<Value*>& idxVec,
bool& allConstantIndices);
//------------------------------------------------------------------------