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Add in support for getIntPtrType to get the pointer type based on the address space.

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This checkin also adds in some tests that utilize these paths and updates some of the
clients.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166578 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Micah Villmow
2012-10-24 15:52:52 +00:00
parent 3575222175
commit aa76e9e2cf
46 changed files with 813 additions and 450 deletions
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11
lib/VMCore/Instructions.cpp
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@@ -2120,6 +2120,17 @@ bool CastInst::isNoopCast(Type *IntPtrTy) const {
return isNoopCast(getOpcode(), getOperand(0)->getType(), getType(), IntPtrTy);
}
/// @brief Determine if a cast is a no-op
bool CastInst::isNoopCast(const DataLayout &DL) const {
unsigned AS = 0;
if (getOpcode() == Instruction::PtrToInt)
AS = getOperand(0)->getType()->getPointerAddressSpace();
else if (getOpcode() == Instruction::IntToPtr)
AS = getType()->getPointerAddressSpace();
Type *IntPtrTy = DL.getIntPtrType(getContext(), AS);
return isNoopCast(getOpcode(), getOperand(0)->getType(), getType(), IntPtrTy);
}
/// This function determines if a pair of casts can be eliminated and what
/// opcode should be used in the elimination. This assumes that there are two
/// instructions like this: