[PATCH] D60725: [LLVM-C] Add Accessors For Global Variable Metadata Properties

[Robert Widmann via Phabricator via llvm-commits]

CodaFi created this revision.
CodaFi added reviewers: jberdine, whitequark, deadalnix.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

Metadata for a global variable is really a  (GlobalVariable, Expression) tuple.  Allow access to these, then allow retrieving the file, scope, and line for a DIVariable, whether global or local.  This should be the last of the accessors required for uniform access to location and file information metadata.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D60725

Files:
  llvm/include/llvm-c/DebugInfo.h
  llvm/lib/IR/DebugInfo.cpp


Index: llvm/lib/IR/DebugInfo.cpp
===================================================================
--- llvm/lib/IR/DebugInfo.cpp
+++ llvm/lib/IR/DebugInfo.cpp
@@ -1248,6 +1248,27 @@
       nullptr, AlignInBits));
 }
 
+LLVMMetadataRef LLVMDIGlobalVariableExpressionGetVariable(LLVMMetadataRef GVE) {
+  return wrap(unwrapDI<DIGlobalVariableExpression>(GVE)->getVariable());
+}
+
+LLVMMetadataRef LLVMDIGlobalVariableExpressionGetExpression(
+    LLVMMetadataRef GVE) {
+  return wrap(unwrapDI<DIGlobalVariableExpression>(GVE)->getExpresssion());
+}
+
+LLVMMetadataRef LLVMDIVariableGetFile(LLVMMetadataRef Var) {
+  return wrap(unwrapDI<DIVariable>(Var)->getFile());
+}
+
+LLVMMetadataRef LLVMDIVariableGetScope(LLVMMetadataRef Var) {
+  return wrap(unwrapDI<DIVariable>(Var)->getScope());
+}
+
+unsigned LLVMDIVariableGetLine(LLVMMetadataRef Var) {
+  return unwrapDI<DIVariable>(Var)->getLine();
+}
+
 LLVMMetadataRef LLVMTemporaryMDNode(LLVMContextRef Ctx, LLVMMetadataRef *Data,
                                     size_t Count) {
   return wrap(
Index: llvm/include/llvm-c/DebugInfo.h
===================================================================
--- llvm/include/llvm-c/DebugInfo.h
+++ llvm/include/llvm-c/DebugInfo.h
@@ -1038,6 +1038,48 @@
     size_t NameLen, const char *Linkage, size_t LinkLen, LLVMMetadataRef File,
     unsigned LineNo, LLVMMetadataRef Ty, LLVMBool LocalToUnit,
     LLVMMetadataRef Expr, LLVMMetadataRef Decl, uint32_t AlignInBits);
+
+/**
+ * Retrieves the \c DIVariable associated with this global variable expression.
+ * \param GVE    The global variable expression.
+ *
+ * @see llvm::DIGlobalVariableExpression::getVariable()
+ */
+LLVMMetadataRef LLVMDIGlobalVariableExpressionGetVariable(LLVMMetadataRef GVE);
+
+/**
+ * Retrieves the \c DIExpression associated with this global variable expression.
+ * \param GVE    The global variable expression.
+ *
+ * @see llvm::DIGlobalVariableExpression::getExpression()
+ */
+LLVMMetadataRef LLVMDIGlobalVariableExpressionGetExpression(
+    LLVMMetadataRef GVE);
+
+/**
+ * Get the metadata of the file associated with a given variable.
+ * \param Var     The variable object.
+ *
+ * @see DIVariable::getFile()
+ */
+LLVMMetadataRef LLVMDIVariableGetFile(LLVMMetadataRef Var);
+
+/**
+ * Get the metadata of the scope associated with a given variable.
+ * \param Var     The variable object.
+ *
+ * @see DIVariable::getScope()
+ */
+LLVMMetadataRef LLVMDIVariableGetScope(LLVMMetadataRef Var);
+
+/**
+ * Get the source line where this \c DIVariable is declared.
+ * \param Var     The DIVariable.
+ *
+ * @see DIVariable::getLine()
+ */
+unsigned LLVMDIVariableGetLine(LLVMMetadataRef Var);
+
 /**
  * Create a new temporary \c MDNode.  Suitable for use in constructing cyclic
  * \c MDNode structures. A temporary \c MDNode is not uniqued, may be RAUW'd,


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