analyze no longer depends on llvm C++ API

src/zig_llvm.cpp

@@ -7,6 +7,13 @@
 
 #include "zig_llvm.hpp"
 
+/*
+ * The point of this file is to contain all the LLVM C++ API interaction so that:
+ * 1. The compile time of other files is kept under control.
+ * 2. Provide a C interface to the LLVM functions we need for self-hosting purposes.
+ * 3. Prevent C++ from infecting the rest of the project.
+ */
+
 #include <llvm/InitializePasses.h>
 #include <llvm/PassRegistry.h>
 #include <llvm/MC/SubtargetFeature.h>
@@ -18,6 +25,8 @@
 #include <llvm/IR/Verifier.h>
 #include <llvm/IR/Instructions.h>
 #include <llvm/IR/IRBuilder.h>
+#include <llvm/IR/DIBuilder.h>
+#include <llvm/IR/DiagnosticInfo.h>
 #include <llvm/Analysis/TargetLibraryInfo.h>
 #include <llvm/Analysis/TargetTransformInfo.h>
 #include <llvm/Transforms/IPO.h>
@@ -122,3 +131,109 @@ LLVMValueRef LLVMZigBuildCall(LLVMBuilderRef B, LLVMValueRef Fn, LLVMValueRef *A
     call_inst->setCallingConv(CC);
     return wrap(unwrap(B)->Insert(call_inst));
 }
+
+LLVMZigDIType *LLVMZigCreateDebugPointerType(LLVMZigDIBuilder *dibuilder, LLVMZigDIType *pointee_type,
+        uint64_t size_in_bits, uint64_t align_in_bits, const char *name)
+{
+    DIType *di_type = reinterpret_cast<DIBuilder*>(dibuilder)->createPointerType(
+            reinterpret_cast<DIType*>(pointee_type), size_in_bits, align_in_bits, name);
+    return reinterpret_cast<LLVMZigDIType*>(di_type);
+}
+
+LLVMZigDIType *LLVMZigCreateDebugBasicType(LLVMZigDIBuilder *dibuilder, const char *name,
+        uint64_t size_in_bits, uint64_t align_in_bits, unsigned encoding)
+{
+    DIType *di_type = reinterpret_cast<DIBuilder*>(dibuilder)->createBasicType(
+            name, size_in_bits, align_in_bits, encoding);
+    return reinterpret_cast<LLVMZigDIType*>(di_type);
+}
+
+unsigned LLVMZigEncoding_DW_ATE_unsigned(void) {
+    return dwarf::DW_ATE_unsigned;
+}
+
+unsigned LLVMZigEncoding_DW_ATE_signed(void) {
+    return dwarf::DW_ATE_signed;
+}
+
+unsigned LLVMZigLang_DW_LANG_C99(void) {
+    return dwarf::DW_LANG_C99;
+}
+
+LLVMZigDIBuilder *LLVMZigCreateDIBuilder(LLVMModuleRef module, bool allow_unresolved) {
+    DIBuilder *di_builder = new DIBuilder(*llvm::unwrap(module), allow_unresolved);
+    return reinterpret_cast<LLVMZigDIBuilder *>(di_builder);
+}
+
+void LLVMZigSetCurrentDebugLocation(LLVMBuilderRef builder, int line, int column, LLVMZigDIScope *scope) {
+    unwrap(builder)->SetCurrentDebugLocation(llvm::DebugLoc::get(
+                line, column, reinterpret_cast<DIScope*>(scope)));
+}
+
+
+LLVMZigDILexicalBlock *LLVMZigCreateLexicalBlock(LLVMZigDIBuilder *dbuilder, LLVMZigDIScope *scope,
+        LLVMZigDIFile *file, unsigned line, unsigned col)
+{
+    DILexicalBlock *result = reinterpret_cast<DIBuilder*>(dbuilder)->createLexicalBlock(
+            reinterpret_cast<DIScope*>(scope),
+            reinterpret_cast<DIFile*>(file),
+            line,
+            col);
+    return reinterpret_cast<LLVMZigDILexicalBlock*>(result);
+}
+
+LLVMZigDIScope *LLVMZigLexicalBlockToScope(LLVMZigDILexicalBlock *lexical_block) {
+    DIScope *scope = reinterpret_cast<DILexicalBlock*>(lexical_block);
+    return reinterpret_cast<LLVMZigDIScope*>(scope);
+}
+
+LLVMZigDIScope *LLVMZigCompileUnitToScope(LLVMZigDICompileUnit *compile_unit) {
+    DIScope *scope = reinterpret_cast<DICompileUnit*>(compile_unit);
+    return reinterpret_cast<LLVMZigDIScope*>(scope);
+}
+
+LLVMZigDIScope *LLVMZigFileToScope(LLVMZigDIFile *difile) {
+    DIScope *scope = reinterpret_cast<DIFile*>(difile);
+    return reinterpret_cast<LLVMZigDIScope*>(scope);
+}
+
+LLVMZigDIScope *LLVMZigSubprogramToScope(LLVMZigDISubprogram *subprogram) {
+    DIScope *scope = reinterpret_cast<DISubprogram*>(subprogram);
+    return reinterpret_cast<LLVMZigDIScope*>(scope);
+}
+
+LLVMZigDICompileUnit *LLVMZigCreateCompileUnit(LLVMZigDIBuilder *dibuilder,
+        unsigned lang, const char *file, const char *dir, const char *producer,
+        bool is_optimized, const char *flags, unsigned runtime_version, const char *split_name,
+        uint64_t dwo_id, bool emit_debug_info)
+{
+    DICompileUnit *result = reinterpret_cast<DIBuilder*>(dibuilder)->createCompileUnit(
+            lang, file, dir, producer, is_optimized, flags, runtime_version, split_name,
+            DIBuilder::FullDebug, dwo_id, emit_debug_info);
+    return reinterpret_cast<LLVMZigDICompileUnit*>(result);
+}
+
+LLVMZigDIFile *LLVMZigCreateFile(LLVMZigDIBuilder *dibuilder, const char *filename, const char *directory) {
+    DIFile *result = reinterpret_cast<DIBuilder*>(dibuilder)->createFile(filename, directory);
+    return reinterpret_cast<LLVMZigDIFile*>(result);
+}
+
+LLVMZigDISubprogram *LLVMZigCreateFunction(LLVMZigDIBuilder *dibuilder, LLVMZigDIScope *scope,
+        const char *name, const char *linkage_name, LLVMZigDIFile *file, unsigned lineno,
+        LLVMZigDISubroutineType *ty, bool is_local_to_unit, bool is_definition, unsigned scope_line,
+        unsigned flags, bool is_optimized, LLVMValueRef function)
+{
+    llvm::Function *unwrapped_function = reinterpret_cast<llvm::Function*>(unwrap(function));
+    DISubprogram *result = reinterpret_cast<DIBuilder*>(dibuilder)->createFunction(
+            reinterpret_cast<DIScope*>(scope),
+            name, linkage_name,
+            reinterpret_cast<DIFile*>(file),
+            lineno,
+            reinterpret_cast<DISubroutineType*>(ty),
+            is_local_to_unit, is_definition, scope_line, flags, is_optimized, unwrapped_function);
+    return reinterpret_cast<LLVMZigDISubprogram*>(result);
+}
+
+void LLVMZigDIBuilderFinalize(LLVMZigDIBuilder *dibuilder) {
+    reinterpret_cast<DIBuilder*>(dibuilder)->finalize();
+}