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Add new function getPtrPtrFromArrayPtr().

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20684 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos
2005-03-19 11:40:31 +00:00
parent 12cf385662
commit 1cecd3a1d2
2 changed files with 11 additions and 0 deletions
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4
include/llvm/Constants.h
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@@ -562,6 +562,10 @@ public:
/// ///
static Constant *getSizeOf(const Type *Ty); static Constant *getSizeOf(const Type *Ty);
/// getPtrPtrFromArrayPtr constant expr - given a pointer to a constant array,
/// return a pointer to a pointer of the array element type.
static Constant *getPtrPtrFromArrayPtr(Constant *C);
/// ConstantExpr::get - Return a binary or shift operator constant expression, /// ConstantExpr::get - Return a binary or shift operator constant expression,
/// folding if possible. /// folding if possible.
/// ///

7
lib/VMCore/Constants.cpp
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@@ -1298,6 +1298,13 @@ Constant *ConstantExpr::getSizeOf(const Type *Ty) {
Type::ULongTy); Type::ULongTy);
} }
Constant *ConstantExpr::getPtrPtrFromArrayPtr(Constant *C) {
// pointer from array is implemented as: getelementptr arr ptr, 0, 0
static std::vector<Constant*> Indices(2, ConstantUInt::get(Type::UIntTy, 0));
return ConstantExpr::getGetElementPtr(C, Indices);
}
Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode, Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode,
Constant *C1, Constant *C2) { Constant *C1, Constant *C2) {
if (Opcode == Instruction::Shl || Opcode == Instruction::Shr) if (Opcode == Instruction::Shl || Opcode == Instruction::Shr)