Add LLVMGlobalAddDebugInfo to Core.cpp

Author: demoitem

llvm/include/llvm-c/Core.h

@@ -2707,6 +2707,14 @@ LLVM_C_ABI void LLVMGlobalEraseMetadata(LLVMValueRef Global, unsigned Kind);
  */
 LLVM_C_ABI void LLVMGlobalClearMetadata(LLVMValueRef Global);
 
+/**
+ * Add debuginfo metadata to this global.
+ *
+ * @see llvm::GlobalVariable::addDebugInfo()
+ */
+LLVM_C_ABI void LLVMGlobalAddDebugInfo(LLVMValueRef Global,
+                                       LLVMMetadataRef GVE);
+
 /**
  * Retrieves an array of metadata entries representing the metadata attached to
  * this value. The caller is responsible for freeing this array by calling

llvm/lib/IR/Core.cpp

@@ -2194,6 +2194,11 @@ void LLVMGlobalClearMetadata(LLVMValueRef Global) {
   unwrap<GlobalObject>(Global)->clearMetadata();
 }
 
+void LLVMGlobalAddDebugInfo(LLVMValueRef Global, LLVMMetadataRef GVE) {
+  unwrap<GlobalVariable>(Global)->addDebugInfo(
+      unwrap<DIGlobalVariableExpression>(GVE));
+}
+
 /*--.. Operations on global variables ......................................--*/
 
 LLVMValueRef LLVMAddGlobal(LLVMModuleRef M, LLVMTypeRef Ty, const char *Name) {

llvm/test/Bindings/llvm-c/add_globaldebuginfo.ll

@@ -0,0 +1,2 @@
+; RUN: llvm-c-test --add-globaldebuginfo < /dev/null
+; This used to trigger an assertion

llvm/tools/llvm-c-test/debuginfo.c

@@ -416,3 +416,37 @@ int llvm_di_type_get_name(void) {
 
   return 0;
 }
+
+int llvm_add_globaldebuginfo(void) {
+  const char *Filename = "debuginfo.c";
+  LLVMModuleRef M = LLVMModuleCreateWithName(Filename);
+  LLVMDIBuilderRef Builder = LLVMCreateDIBuilder(M);
+  LLVMMetadataRef File =
+      LLVMDIBuilderCreateFile(Builder, Filename, strlen(Filename), ".", 1);
+
+  LLVMMetadataRef GlobalVarValueExpr =
+      LLVMDIBuilderCreateConstantValueExpression(Builder, 0);
+  LLVMMetadataRef Int64Ty =
+      LLVMDIBuilderCreateBasicType(Builder, "Int64", 5, 64, 0, LLVMDIFlagZero);
+  LLVMMetadataRef Int64TypeDef = LLVMDIBuilderCreateTypedef(
+      Builder, Int64Ty, "int64_t", 7, File, 42, File, 0);
+
+  LLVMMetadataRef GVE = LLVMDIBuilderCreateGlobalVariableExpression(
+      Builder, File, "global", 6, "", 0, File, 1, Int64TypeDef, true,
+      GlobalVarValueExpr, NULL, 0);
+
+  LLVMTypeRef RecType =
+      LLVMStructCreateNamed(LLVMGetModuleContext(M), "struct");
+  LLVMValueRef Global = LLVMAddGlobal(M, RecType, "global");
+
+  LLVMGlobalAddDebugInfo(Global, GVE);
+  size_t numEntries;
+  LLVMValueMetadataEntry *ME = LLVMGlobalCopyAllMetadata(Global, &numEntries);
+  assert(ME != NULL);
+  assert(numEntries == 1);
+
+  LLVMDisposeDIBuilder(Builder);
+  LLVMDisposeModule(M);
+
+  return 0;
+}

llvm/tools/llvm-c-test/llvm-c-test.h

@@ -45,6 +45,7 @@ int llvm_add_named_metadata_operand(void);
 int llvm_set_metadata(void);
 int llvm_replace_md_operand(void);
 int llvm_is_a_value_as_metadata(void);
+int llvm_add_globaldebuginfo(void);
 
 // object.c
 int llvm_object_list_sections(void);

llvm/tools/llvm-c-test/main.c

@@ -101,6 +101,8 @@ int main(int argc, char **argv) {
     return llvm_replace_md_operand();
   } else if (argc == 2 && !strcmp(argv[1], "--is-a-value-as-metadata")) {
     return llvm_is_a_value_as_metadata();
+  } else if (argc == 2 && !strcmp(argv[1], "--add-globaldebuginfo")) {
+    return llvm_add_globaldebuginfo();
   } else if (argc == 2 && !strcmp(argv[1], "--test-function-attributes")) {
     return llvm_test_function_attributes();
   } else if (argc == 2 && !strcmp(argv[1], "--test-callsite-attributes")) {