Print out the location of expanded multiclass defs in TableGen errors.

When reporting an error for a defm, we would previously only report the
location of the outer defm, which is not always where the error is.

Now we also print the location of the expanded multiclass defs:

lib/Target/X86/X86InstrSSE.td:2902:12: error: foo
  defm ADD : basic_sse12_fp_binop_s<0x58, "add", fadd, SSE_ALU_ITINS_S>,
             ^
lib/Target/X86/X86InstrSSE.td:2801:11: note: instantiated from multiclass
  defm PD : sse12_fp_packed<opc, !strconcat(OpcodeStr, "pd"), OpNode, VR128,
            ^
lib/Target/X86/X86InstrSSE.td:194:5: note: instantiated from multiclass
    def rm : PI<opc, MRMSrcMem, (outs RC:$dst), (ins RC:$src1, x86memop:$src2),
        ^

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162409 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 17 insertions, 12 deletions

diff --git a/include/llvm/TableGen/Error.h b/include/llvm/TableGen/Error.h
index fd5f805ffc..5c1c3adf7e 100644
--- a/include/llvm/TableGen/Error.h
+++ b/include/llvm/TableGen/Error.h
@@ -20,21 +20,22 @@
 namespace llvm {
 
 class TGError {
-  SMLoc Loc;
+  SmallVector<SMLoc, 4> Locs;
   std::string Message;
 public:
-  TGError(SMLoc loc, const std::string &message) : Loc(loc), Message(message) {}
+  TGError(ArrayRef<SMLoc> locs, const std::string &message)
+    : Locs(locs.begin(), locs.end()), Message(message) {}
 
-  SMLoc getLoc() const { return Loc; }
+  ArrayRef<SMLoc> getLoc() const { return Locs; }
   const std::string &getMessage() const { return Message; }
 };
 
-void PrintWarning(SMLoc WarningLoc, const Twine &Msg);
+void PrintWarning(ArrayRef<SMLoc> WarningLoc, const Twine &Msg);
 void PrintWarning(const char *Loc, const Twine &Msg);
 void PrintWarning(const Twine &Msg);
 void PrintWarning(const TGError &Warning);
 
-void PrintError(SMLoc ErrorLoc, const Twine &Msg);
+void PrintError(ArrayRef<SMLoc> ErrorLoc, const Twine &Msg);
 void PrintError(const char *Loc, const Twine &Msg);
 void PrintError(const Twine &Msg);
 void PrintError(const TGError &Error);
diff --git a/include/llvm/TableGen/Record.h b/include/llvm/TableGen/Record.h
index a8256b7735..add5131da5 100644
--- a/include/llvm/TableGen/Record.h
+++ b/include/llvm/TableGen/Record.h
@@ -1301,7 +1301,9 @@ class Record {
   // Unique record ID.
   unsigned ID;
   Init *Name;
-  SMLoc Loc;
+  // Location where record was instantiated, followed by the location of
+  // multiclass prototypes used.
+  SmallVector<SMLoc, 4> Locs;
   std::vector<Init *> TemplateArgs;
   std::vector<RecordVal> Values;
   std::vector<Record*> SuperClasses;
@@ -1317,13 +1319,15 @@ class Record {
 public:
 
   // Constructs a record.
-  explicit Record(const std::string &N, SMLoc loc, RecordKeeper &records) :
-    ID(LastID++), Name(StringInit::get(N)), Loc(loc), TrackedRecords(records),
-      TheInit(0) {
+  explicit Record(const std::string &N, ArrayRef<SMLoc> locs,
+                  RecordKeeper &records) :
+    ID(LastID++), Name(StringInit::get(N)), Locs(locs.begin(), locs.end()),
+    TrackedRecords(records), TheInit(0) {
     init();
   }
-  explicit Record(Init *N, SMLoc loc, RecordKeeper &records) :
-    ID(LastID++), Name(N), Loc(loc), TrackedRecords(records), TheInit(0) {
+  explicit Record(Init *N, ArrayRef<SMLoc> locs, RecordKeeper &records) :
+    ID(LastID++), Name(N), Locs(locs.begin(), locs.end()),
+    TrackedRecords(records), TheInit(0) {
     init();
   }
   ~Record() {}
@@ -1345,7 +1349,7 @@ public:
   void setName(Init *Name);               // Also updates RecordKeeper.
   void setName(const std::string &Name);  // Also updates RecordKeeper.
 
-  SMLoc getLoc() const { return Loc; }
+  ArrayRef<SMLoc> getLoc() const { return Locs; }
 
   /// get the corresponding DefInit.
   DefInit *getDefInit();