add a new TGError class and use it to propagate location info with

errors when thrown.  This gets us nice errors like this from tblgen:

CMOVL32rr: 	(set GR32:i32:$dst, (X86cmov GR32:$src1, GR32:$src2))
/Users/sabre/llvm/Debug/bin/tblgen: error:
Included from X86.td:116:
Parsing X86InstrInfo.td:922: In CMOVL32rr: X86cmov node requires exactly 4 operands!
def CMOVL32rr : I<0x4C, MRMSrcReg,       // if <s, GR32 = GR32
^

instead of just:

CMOVL32rr: 	(set GR32:i32:$dst, (X86cmov GR32:$src1, GR32:$src2))
/Users/sabre/llvm/Debug/bin/tblgen: In CMOVL32rr: X86cmov node requires exactly 4 operands!

This is all I plan to do with this, but it should be easy enough to improve if anyone 
cares (e.g. keeping more loc info in "dag" expr records in tblgen.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66898 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/utils/TableGen/Record.h b/utils/TableGen/Record.h
index 5eb07eb..00b7730 100644
--- a/utils/TableGen/Record.h
+++ b/utils/TableGen/Record.h
@@ -1195,6 +1195,17 @@ struct LessRecordFieldName {
   }
 };
 
+
+class TGError {
+  TGLoc Loc;
+  std::string Message;
+public:
+  TGError(TGLoc loc, const std::string &message) : Loc(loc), Message(message) {}
+  
+  TGLoc getLoc() const { return Loc; }
+  const std::string &getMessage() const { return Message; }
+};
+  
   
 std::ostream &operator<<(std::ostream &OS, const RecordKeeper &RK);