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Added interface to allow clients to create a MemIntrinsicNode for

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target intrinsics that touches memory


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58548 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mon P Wang 2008-11-01 20:24:53 +00:00
parent de5b06b3e1
commit 3efcd4a65c
2 changed files with 39 additions and 5 deletions
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23
include/llvm/Target/TargetLowering.h
View File

@ -24,6 +24,7 @@
#include "llvm/Constants.h"
#include "llvm/InlineAsm.h"
#include "llvm/Instructions.h"
#include "llvm/CodeGen/SelectionDAGNodes.h"
#include "llvm/CodeGen/RuntimeLibcalls.h"
#include "llvm/ADT/APFloat.h"
@ -263,7 +264,27 @@ public:
MVT &IntermediateVT,
unsigned &NumIntermediates,
MVT &RegisterVT) const;
/// getTgtMemIntrinsic: Given an intrinsic, checks if on the target the
/// intrinsic will need to map to a MemIntrinsicNode (touches memory). If
/// this is the case, it returns true and store the intrinsic
/// information into the IntrinsicInfo that was passed to the function.
typedef struct IntrinsicInfo {
unsigned opc; // target opcode
MVT memVT; // memory VT
const Value* ptrVal; // value representing memory location
int offset; // offset off of ptrVal
unsigned align; // alignment
bool vol; // is volatile?
bool readMem; // reads memory?
bool writeMem; // writes memory?
} IntrinisicInfo;
virtual bool getTgtMemIntrinsic(IntrinsicInfo& Info,
CallInst &I, unsigned Intrinsic) {
return false;
}
/// getWidenVectorType: given a vector type, returns the type to widen to
/// (e.g., v7i8 to v8i8). If the vector type is legal, it returns itself.
/// If there is no vector type that we want to widen to, returns MVT::Other

21
lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
View File

@ -2577,9 +2577,14 @@ void SelectionDAGLowering::visitTargetIntrinsic(CallInst &I,
Ops.push_back(getRoot());
}
}
// Add the intrinsic ID as an integer operand.
Ops.push_back(DAG.getConstant(Intrinsic, TLI.getPointerTy()));
// Info is set by getTgtMemInstrinsic
TargetLowering::IntrinsicInfo Info;
bool IsTgtIntrinsic = TLI.getTgtMemIntrinsic(Info, I, Intrinsic);
// Add the intrinsic ID as an integer operand if it's not a target intrinsic.
if (!IsTgtIntrinsic)
Ops.push_back(DAG.getConstant(Intrinsic, TLI.getPointerTy()));
// Add all operands of the call to the operand list.
for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i) {
@ -2610,7 +2615,15 @@ void SelectionDAGLowering::visitTargetIntrinsic(CallInst &I,
// Create the node.
SDValue Result;
if (!HasChain)
if (IsTgtIntrinsic) {
// This is target intrinsic that touches memory
Result = DAG.getMemIntrinsicNode(Info.opc, VTList, VTs.size(),
&Ops[0], Ops.size(),
Info.memVT, Info.ptrVal, Info.offset,
Info.align, Info.vol,
Info.readMem, Info.writeMem);
}
else if (!HasChain)
Result = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, VTList, VTs.size(),
&Ops[0], Ops.size());
else if (I.getType() != Type::VoidTy)