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Introduce the "@llvm.dbg.value" debug intrinsic.

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The semantics of llvm.dbg.value are that starting from where it is executed, an offset into the specified user source variable is specified to get a new value.

An example:
  call void @llvm.dbg.value(metadata !{ i32 7 }, i64 0, metadata !2)
Here the user source variable associated with metadata #2 gets the value "i32 7" at offset 0.
 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90788 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Victor Hernandez
2009-12-07 19:36:34 +00:00
parent bc39a795f4
commit 2f9dac721d
4 changed files with 60 additions and 0 deletions
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29
lib/Analysis/DebugInfo.cpp
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@@ -1050,6 +1050,35 @@ Instruction *DIFactory::InsertDeclare(Value *Storage, DIVariable D,
return CallInst::Create(DeclareFn, Args, Args+2, "", InsertAtEnd);
}
/// InsertValue - Insert a new llvm.dbg.value intrinsic call.
Instruction *DIFactory::InsertValue(Value *V, Value *Offset, DIVariable D,
Instruction *InsertBefore) {
assert(V && "no value passed to dbg.value");
assert(Offset->getType() == Type::getInt64Ty(V->getContext()) &&
"offset must be i64");
if (!ValueFn)
ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
Value *Elts[] = { V };
Value *Args[] = { MDNode::get(V->getContext(), Elts, 1), Offset,
D.getNode() };
return CallInst::Create(ValueFn, Args, Args+3, "", InsertBefore);
}
/// InsertValue - Insert a new llvm.dbg.value intrinsic call.
Instruction *DIFactory::InsertValue(Value *V, Value *Offset, DIVariable D,
BasicBlock *InsertAtEnd) {
assert(V && "no value passed to dbg.value");
assert(Offset->getType() == Type::getInt64Ty(V->getContext()) &&
"offset must be i64");
if (!ValueFn)
ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
Value *Elts[] = { V };
Value *Args[] = { MDNode::get(V->getContext(), Elts, 1), Offset,
D.getNode() };
return CallInst::Create(ValueFn, Args, Args+3, "", InsertAtEnd);
}
//===----------------------------------------------------------------------===//
// DebugInfoFinder implementations.