Emit parameter and local variable debug information with -g.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51765 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 1827fc9..19745dc 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -44,6 +44,7 @@
, CompileUnitAnchor(NULL)
, SubprogramAnchor(NULL)
, RegionStack()
+, VariableDescList()
, Subprogram(NULL)
{
SR = new llvm::DISerializer();
@@ -72,7 +73,12 @@
= RegionStack.begin(); I != RegionStack.end(); ++I) {
delete *I;
}
-
+
+ for (std::vector<llvm::VariableDesc *>::iterator I
+ = VariableDescList.begin(); I != VariableDescList.end(); ++I) {
+ delete *I;
+ }
+
delete CompileUnitAnchor;
delete SubprogramAnchor;
}
@@ -519,3 +525,44 @@
RegionStack.pop_back();
}
+/// EmitDeclare - Emit local variable declaration debug info.
+void CGDebugInfo::EmitDeclare(const VarDecl *decl, unsigned Tag,
+ llvm::Value *AI,
+ llvm::IRBuilder &Builder)
+{
+ // FIXME: If it is a compiler generated temporary then return.
+
+ // Construct llvm.dbg.declare function.
+ if (!DeclareFn)
+ DeclareFn = llvm::Intrinsic::getDeclaration(&M->getModule(),
+ llvm::Intrinsic::dbg_declare);
+
+ // Get type information.
+ llvm::CompileUnitDesc *Unit = getOrCreateCompileUnit(CurLoc);
+ llvm::TypeDesc *TyDesc = getOrCreateType(decl->getType(), Unit);
+
+ SourceManager &SM = M->getContext().getSourceManager();
+ uint64_t Loc = SM.getLogicalLineNumber(CurLoc);
+
+ // Construct variable.
+ llvm::VariableDesc *Variable = new llvm::VariableDesc(Tag);
+ Variable->setContext(RegionStack.back());
+ Variable->setName(decl->getName());
+ Variable->setFile(Unit);
+ Variable->setLine(Loc);
+ Variable->setType(TyDesc);
+
+ // Push it onto the list so that we can free it.
+ VariableDescList.push_back(Variable);
+
+ // Cast the AllocA result to a {}* for the call to llvm.dbg.declare.
+ // These bit cast instructions will get freed when the basic block is
+ // deleted. So do not need to free them explicity.
+ const llvm::PointerType *EmpPtr = SR->getEmptyStructPtrType();
+ llvm::Value *AllocACast = new llvm::BitCastInst(AI, EmpPtr, decl->getName(),
+ Builder.GetInsertBlock());
+
+ // Call llvm.dbg.declare.
+ Builder.CreateCall2(DeclareFn, AllocACast, getCastValueFor(Variable), "");
+}
+