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Create SDDbgValue for dbg_value intrinsics and remember its connections with DAG nodes. 

This is a work in progress. Patch by Dale Johannesen!

llvm-svn: 98568
This commit is contained in:
Devang Patel 2010-03-15 19:15:44 +00:00
parent 347a0eb85c
commit f2bce7cbae
1 changed files with 28 additions and 5 deletions
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33
llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
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@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "isel"
#include "SDNodeDbgValue.h"
#include "SelectionDAGBuilder.h"
#include "FunctionLoweringInfo.h"
#include "llvm/ADT/BitVector.h"
@ -3800,11 +3801,6 @@ SelectionDAGBuilder::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
return 0;
}
case Intrinsic::dbg_value: {
// FIXME: currently, we get here only if OptLevel != CodeGenOpt::None.
// The real handling of this intrinsic is in FastISel.
if (OptLevel != CodeGenOpt::None)
// FIXME: Variable debug info is not supported here.
return 0;
DwarfWriter *DW = DAG.getDwarfWriter();
if (!DW)
return 0;
@ -3813,9 +3809,36 @@ SelectionDAGBuilder::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
return 0;
MDNode *Variable = DI.getVariable();
uint64_t Offset = DI.getOffset();
Value *V = DI.getValue();
if (!V)
return 0;
// Build an entry in DbgOrdering. Debug info input nodes get an SDNodeOrder
// but do not always have a corresponding SDNode built. The SDNodeOrder
// absolute, but not relative, values are different depending on whether
// debug info exists.
++SDNodeOrder;
if (isa<ConstantInt>(V) || isa<ConstantFP>(V)) {
SDDbgValue* dv = new SDDbgValue(Variable, V, Offset, dl, SDNodeOrder);
DAG.RememberDbgInfo(dv);
} else {
SDValue &N = NodeMap[V];
if (N.getNode()) {
SDDbgValue *dv = new SDDbgValue(Variable, N.getNode(),
N.getResNo(), Offset, dl, SDNodeOrder);
DAG.AssignDbgInfo(N.getNode(), dv);
} else {
// We may expand this to cover more cases. One case where we have no
// data available is an unreferenced parameter; we need this fallback.
SDDbgValue* dv = new SDDbgValue(Variable,
UndefValue::get(V->getType()),
Offset, dl, SDNodeOrder);
DAG.RememberDbgInfo(dv);
}
}
// Build a debug info table entry.
if (BitCastInst *BCI = dyn_cast<BitCastInst>(V))
V = BCI->getOperand(0);
AllocaInst *AI = dyn_cast<AllocaInst>(V);