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SelectionDAG: Use correct pointer size when lowering function arguments v2

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This adds minimal support to the SelectionDAG for handling address spaces
with different pointer sizes.  The SelectionDAG should now correctly
lower pointer function arguments to the correct size as well as generate
the correct code when lowering getelementptr.

This patch also updates the R600 DataLayout to use 32-bit pointers for
the local address space.

v2:
  - Add more helper functions to TargetLoweringBase
  - Use CHECK-LABEL for tests

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189221 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard
2013-08-26 15:05:36 +00:00
parent b51439594a
commit da25cd3e6d
8 changed files with 79 additions and 14 deletions
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13
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@@ -3242,6 +3242,10 @@ void SelectionDAGBuilder::visitGetElementPtr(const User &I) {
Ty = StTy->getElementType(Field);
} else {
uint32_t AS = 0;
if (PointerType *PtrType = dyn_cast<PointerType>(Ty)) {
AS = PtrType->getAddressSpace();
}
Ty = cast<SequentialType>(Ty)->getElementType();
// If this is a constant subscript, handle it quickly.
@@ -3251,14 +3255,13 @@ void SelectionDAGBuilder::visitGetElementPtr(const User &I) {
uint64_t Offs =
TD->getTypeAllocSize(Ty)*cast<ConstantInt>(CI)->getSExtValue();
SDValue OffsVal;
EVT PTy = TLI->getPointerTy();
EVT PTy = TLI->getPointerTy(AS);
unsigned PtrBits = PTy.getSizeInBits();
if (PtrBits < 64)
OffsVal = DAG.getNode(ISD::TRUNCATE, getCurSDLoc(),
TLI->getPointerTy(),
OffsVal = DAG.getNode(ISD::TRUNCATE, getCurSDLoc(), PTy,
DAG.getConstant(Offs, MVT::i64));
else
OffsVal = DAG.getIntPtrConstant(Offs);
OffsVal = DAG.getConstant(Offs, PTy);
N = DAG.getNode(ISD::ADD, getCurSDLoc(), N.getValueType(), N,
OffsVal);
@@ -3266,7 +3269,7 @@ void SelectionDAGBuilder::visitGetElementPtr(const User &I) {
}
// N = N + Idx * ElementSize;
APInt ElementSize = APInt(TLI->getPointerTy().getSizeInBits(),
APInt ElementSize = APInt(TLI->getPointerSizeInBits(AS),
TD->getTypeAllocSize(Ty));
SDValue IdxN = getValue(Idx);