Remove exception handling usage from tblgen.

Most places can use PrintFatalError as the unwinding mechanism was not
used for anything other than printing the error. The single exception
was CodeGenDAGPatterns.cpp, where intermediate errors during type
resolution were ignored to simplify incremental platform development.
This use is replaced by an error flag in TreePattern and bailout earlier
in various places if it is set. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166712 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 1 deletions

diff --git a/utils/TableGen/FixedLenDecoderEmitter.cpp b/utils/TableGen/FixedLenDecoderEmitter.cpp
index c53776b9ff..5cabcadabd 100644
--- a/utils/TableGen/FixedLenDecoderEmitter.cpp
+++ b/utils/TableGen/FixedLenDecoderEmitter.cpp
@@ -15,6 +15,7 @@
 #define DEBUG_TYPE "decoder-emitter"
 
 #include "CodeGenTarget.h"
+#include "llvm/TableGen/Error.h"
 #include "llvm/TableGen/Record.h"
 #include "llvm/ADT/APInt.h"
 #include "llvm/ADT/SmallString.h"
@@ -741,7 +742,7 @@ void FixedLenDecoderEmitter::emitTable(formatted_raw_ostream &OS,
 
     switch (*I) {
     default:
-      throw "invalid decode table opcode";
+      PrintFatalError("invalid decode table opcode");
     case MCD::OPC_ExtractField: {
       ++I;
       unsigned Start = *I++;