[CodeGen] Don't include CGDebugInfo.h in CodeGenFunction.h (NFC) (llvm#134100)

This is an expensive header, only include it where needed. Move some
functions out of line to achieve that.

This reduces time to build clang by ~0.5% in terms of instructions
retired.

Author: nikic

clang/lib/CodeGen/CGBuiltin.cpp

@@ -14,6 +14,7 @@
 #include "ABIInfo.h"
 #include "CGCUDARuntime.h"
 #include "CGCXXABI.h"
+#include "CGDebugInfo.h"
 #include "CGObjCRuntime.h"
 #include "CGOpenCLRuntime.h"
 #include "CGRecordLayout.h"

clang/lib/CodeGen/CGCall.cpp

@@ -17,6 +17,7 @@
 #include "CGBlocks.h"
 #include "CGCXXABI.h"
 #include "CGCleanup.h"
+#include "CGDebugInfo.h"
 #include "CGRecordLayout.h"
 #include "CodeGenFunction.h"
 #include "CodeGenModule.h"

clang/lib/CodeGen/CGCoroutine.cpp

@@ -11,10 +11,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "CGCleanup.h"
+#include "CGDebugInfo.h"
 #include "CodeGenFunction.h"
-#include "llvm/ADT/ScopeExit.h"
 #include "clang/AST/StmtCXX.h"
 #include "clang/AST/StmtVisitor.h"
+#include "llvm/ADT/ScopeExit.h"
 
 using namespace clang;
 using namespace CodeGen;

clang/lib/CodeGen/CGDebugInfo.cpp

@@ -6223,3 +6223,23 @@ CGDebugInfo::createConstantValueExpression(const clang::ValueDecl *VD,
 
   return nullptr;
 }
+
+CodeGenFunction::LexicalScope::LexicalScope(CodeGenFunction &CGF,
+                                            SourceRange Range)
+    : RunCleanupsScope(CGF), Range(Range), ParentScope(CGF.CurLexicalScope) {
+  CGF.CurLexicalScope = this;
+  if (CGDebugInfo *DI = CGF.getDebugInfo())
+    DI->EmitLexicalBlockStart(CGF.Builder, Range.getBegin());
+}
+
+CodeGenFunction::LexicalScope::~LexicalScope() {
+  if (CGDebugInfo *DI = CGF.getDebugInfo())
+    DI->EmitLexicalBlockEnd(CGF.Builder, Range.getEnd());
+
+  // If we should perform a cleanup, force them now.  Note that
+  // this ends the cleanup scope before rescoping any labels.
+  if (PerformCleanup) {
+    ApplyDebugLocation DL(CGF, Range.getEnd());
+    ForceCleanup();
+  }
+}

clang/lib/CodeGen/CGDeclCXX.cpp

@@ -11,6 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "CGCXXABI.h"
+#include "CGDebugInfo.h"
 #include "CGHLSLRuntime.h"
 #include "CGObjCRuntime.h"
 #include "CGOpenMPRuntime.h"

clang/lib/CodeGen/CGException.cpp

@@ -12,6 +12,7 @@
 
 #include "CGCXXABI.h"
 #include "CGCleanup.h"
+#include "CGDebugInfo.h"
 #include "CGObjCRuntime.h"
 #include "CodeGenFunction.h"
 #include "ConstantEmitter.h"

clang/lib/CodeGen/CGExprAgg.cpp

@@ -11,6 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "CGCXXABI.h"
+#include "CGDebugInfo.h"
 #include "CGHLSLRuntime.h"
 #include "CGObjCRuntime.h"
 #include "CGRecordLayout.h"

clang/lib/CodeGen/CGExprComplex.cpp

@@ -10,6 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "CGDebugInfo.h"
 #include "CGOpenMPRuntime.h"
 #include "CodeGenFunction.h"
 #include "CodeGenModule.h"

clang/lib/CodeGen/CGNonTrivialStruct.cpp

@@ -11,6 +11,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "CGDebugInfo.h"
 #include "CodeGenFunction.h"
 #include "CodeGenModule.h"
 #include "clang/AST/NonTrivialTypeVisitor.h"

clang/lib/CodeGen/CGOpenMPRuntime.cpp

@@ -14,6 +14,7 @@
 #include "ABIInfoImpl.h"
 #include "CGCXXABI.h"
 #include "CGCleanup.h"
+#include "CGDebugInfo.h"
 #include "CGRecordLayout.h"
 #include "CodeGenFunction.h"
 #include "TargetInfo.h"