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If an AllocaInst referred by DbgDeclareInst is used by a LoadInst then the LoadInst should also get a corresponding llvm.dbg.value intrinsic.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127924 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -24,6 +24,7 @@ class BranchInst;
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class Instruction;
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class DbgDeclareInst;
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class StoreInst;
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class LoadInst;
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class Value;
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class Pass;
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class PHINode;
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@ -170,6 +171,11 @@ static inline unsigned getKnownAlignment(Value *V, const TargetData *TD = 0) {
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bool ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
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StoreInst *SI, DIBuilder &Builder);
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/// Inserts a llvm.dbg.value instrinsic before the stores to an alloca'd value
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/// that has an associated llvm.dbg.decl intrinsic.
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bool ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
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LoadInst *LI, DIBuilder &Builder);
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/// LowerDbgDeclare - Lowers llvm.dbg.declare intrinsics into appropriate set
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/// of llvm.dbg.value intrinsics.
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bool LowerDbgDeclare(Function &F);
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@ -794,6 +794,28 @@ bool llvm::ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
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return true;
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}
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/// Inserts a llvm.dbg.value instrinsic before the stores to an alloca'd value
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/// that has an associated llvm.dbg.decl intrinsic.
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bool llvm::ConvertDebugDeclareToDebugValue(DbgDeclareInst *DDI,
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LoadInst *LI, DIBuilder &Builder) {
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DIVariable DIVar(DDI->getVariable());
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if (!DIVar.Verify())
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return false;
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Instruction *DbgVal =
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Builder.insertDbgValueIntrinsic(LI->getOperand(0), 0,
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DIVar, LI);
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// Propagate any debug metadata from the store onto the dbg.value.
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DebugLoc LIDL = LI->getDebugLoc();
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if (!LIDL.isUnknown())
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DbgVal->setDebugLoc(LIDL);
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// Otherwise propagate debug metadata from dbg.declare.
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else
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DbgVal->setDebugLoc(DDI->getDebugLoc());
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return true;
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}
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/// LowerDbgDeclare - Lowers llvm.dbg.declare intrinsics into appropriate set
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/// of llvm.dbg.value intrinsics.
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bool llvm::LowerDbgDeclare(Function &F) {
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@ -815,6 +837,8 @@ bool llvm::LowerDbgDeclare(Function &F) {
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UI != E; ++UI)
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if (StoreInst *SI = dyn_cast<StoreInst>(*UI))
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ConvertDebugDeclareToDebugValue(DDI, SI, DIB);
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else if (LoadInst *LI = dyn_cast<LoadInst>(*UI))
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ConvertDebugDeclareToDebugValue(DDI, LI, DIB);
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}
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DDI->eraseFromParent();
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}
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