Update Diagnostic handling for changes in CFE.

The clang frontend no longer emits the current working directory for
DIFiles containing an absolute path in the filename: and will move the
common prefix between current working directory and the file into the
directory: component.

https://reviews.llvm.org/D55085

llvm-svn: 348155

llvm/include/llvm/IR/DiagnosticInfo.h

@@ -340,7 +340,7 @@ private:
 };
 
 class DiagnosticLocation {
-  StringRef Filename;
+  DIFile *File = nullptr;
   unsigned Line = 0;
   unsigned Column = 0;
 
@@ -349,8 +349,11 @@ public:
   DiagnosticLocation(const DebugLoc &DL);
   DiagnosticLocation(const DISubprogram *SP);
 
-  bool isValid() const { return !Filename.empty(); }
-  StringRef getFilename() const { return Filename; }
+  bool isValid() const { return File; }
+  /// Return the full path to the file.
+  std::string getAbsolutePath() const;
+  /// Return the file name relative to the compilation directory.
+  StringRef getRelativePath() const { return File->getFilename(); }
   unsigned getLine() const { return Line; }
   unsigned getColumn() const { return Column; }
 };
@@ -375,9 +378,13 @@ public:
   const std::string getLocationStr() const;
 
   /// Return location information for this diagnostic in three parts:
-  /// the source file name, line number and column.
-  void getLocation(StringRef *Filename, unsigned *Line, unsigned *Column) const;
+  /// the relative source file path, line number and column.
+  void getLocation(StringRef &RelativePath, unsigned &Line,
+                   unsigned &Column) const;
 
+  /// Return the absolute path tot the file.
+  std::string getAbsolutePath() const;
+  
   const Function &getFunction() const { return Fn; }
   DiagnosticLocation getLocation() const { return Loc; }
 

llvm/lib/IR/DiagnosticInfo.cpp

@@ -33,9 +33,10 @@
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Path.h"
 #include "llvm/Support/Regex.h"
-#include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/ScopedPrinter.h"
+#include "llvm/Support/raw_ostream.h"
 #include <atomic>
 #include <cassert>
 #include <memory>
@@ -106,7 +107,7 @@ void DiagnosticInfoPGOProfile::print(DiagnosticPrinter &DP) const {
 DiagnosticLocation::DiagnosticLocation(const DebugLoc &DL) {
   if (!DL)
     return;
-  Filename = DL->getFilename();
+  File = DL->getFile();
   Line = DL->getLine();
   Column = DL->getColumn();
 }
@@ -114,17 +115,32 @@ DiagnosticLocation::DiagnosticLocation(const DebugLoc &DL) {
 DiagnosticLocation::DiagnosticLocation(const DISubprogram *SP) {
   if (!SP)
     return;
-  Filename = SP->getFilename();
+  
+  File = SP->getFile();
   Line = SP->getScopeLine();
   Column = 0;
 }
 
-void DiagnosticInfoWithLocationBase::getLocation(StringRef *Filename,
-                                                 unsigned *Line,
-                                                 unsigned *Column) const {
-  *Filename = Loc.getFilename();
-  *Line = Loc.getLine();
-  *Column = Loc.getColumn();
+std::string DiagnosticLocation::getAbsolutePath() const {
+  StringRef Name = File->getFilename();
+  if (sys::path::is_absolute(Name))
+    return Name;
+
+  SmallString<128> Path;
+  sys::path::append(Path, File->getDirectory(), Name);
+  return sys::path::remove_leading_dotslash(Path).str();
+}
+
+std::string DiagnosticInfoWithLocationBase::getAbsolutePath() const {
+  return Loc.getAbsolutePath();
+}
+
+void DiagnosticInfoWithLocationBase::getLocation(StringRef &RelativePath,
+                                                 unsigned &Line,
+                                                 unsigned &Column) const {
+  RelativePath = Loc.getRelativePath();
+  Line = Loc.getLine();
+  Column = Loc.getColumn();
 }
 
 const std::string DiagnosticInfoWithLocationBase::getLocationStr() const {
@@ -132,7 +148,7 @@ const std::string DiagnosticInfoWithLocationBase::getLocationStr() const {
   unsigned Line = 0;
   unsigned Column = 0;
   if (isLocationAvailable())
-    getLocation(&Filename, &Line, &Column);
+    getLocation(Filename, Line, Column);
   return (Filename + ":" + Twine(Line) + ":" + Twine(Column)).str();
 }
 
@@ -399,7 +415,7 @@ template <> struct MappingTraits<DiagnosticLocation> {
   static void mapping(IO &io, DiagnosticLocation &DL) {
     assert(io.outputting() && "input not yet implemented");
 
-    StringRef File = DL.getFilename();
+    StringRef File = DL.getRelativePath();
     unsigned Line = DL.getLine();
     unsigned Col = DL.getColumn();
 

llvm/test/CodeGen/AMDGPU/vi-removed-intrinsics.ll

@@ -17,7 +17,7 @@ attributes #1 = { nounwind }
 !llvm.module.flags = !{!2, !3}
 
 !0 = distinct !DICompileUnit(language: DW_LANG_OpenCL, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: NoDebug)
-!1 = !DIFile(filename: "foo.cl", directory: "/dev/null")
+!1 = !DIFile(filename: "foo.cl", directory: ".")
 !2 = !{i32 2, !"Dwarf Version", i32 4}
 !3 = !{i32 2, !"Debug Info Version", i32 3}
 !4 = !DILocation(line: 1, column: 42, scope: !5)