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add a GEP helper function

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llvm-svn: 36515
This commit is contained in:
Chris Lattner 2007-04-27 20:35:56 +00:00
parent 54544c8835
commit 9bfe8f4517
2 changed files with 17 additions and 0 deletions
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6
include/llvm/Instructions.h
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@ -441,6 +441,12 @@ public:
/// zeros. If so, the result pointer and the first operand have the same
/// value, just potentially different types.
bool hasAllZeroIndices() const;
/// hasAllConstantIndices - Return true if all of the indices of this GEP are
/// constant integers. If so, the result pointer and the first operand have
/// a constant offset between them.
bool hasAllConstantIndices() const;
// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const GetElementPtrInst *) { return true; }

11
lib/VMCore/Instructions.cpp
View File

@ -1043,6 +1043,17 @@ bool GetElementPtrInst::hasAllZeroIndices() const {
return true;
}
/// hasAllConstantIndices - Return true if all of the indices of this GEP are
/// constant integers. If so, the result pointer and the first operand have
/// a constant offset between them.
bool GetElementPtrInst::hasAllConstantIndices() const {
for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
if (!isa<ConstantInt>(getOperand(i)))
return false;
}
return true;
}
//===----------------------------------------------------------------------===//
// ExtractElementInst Implementation