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, 15 insertions, 14 deletions

diff --git a/utils/TableGen/CodeGenTarget.cpp b/utils/TableGen/CodeGenTarget.cpp
index 3a3b0aa380..c9992eb392 100644
--- a/utils/TableGen/CodeGenTarget.cpp
+++ b/utils/TableGen/CodeGenTarget.cpp
@@ -10,13 +10,14 @@
 // This class wraps target description classes used by the various code
 // generation TableGen backends.  This makes it easier to access the data and
 // provides a single place that needs to check it for validity.  All of these
-// classes throw exceptions on error conditions.
+// classes abort on error conditions.
 //
 //===----------------------------------------------------------------------===//
 
 #include "CodeGenTarget.h"
 #include "CodeGenIntrinsics.h"
 #include "CodeGenSchedule.h"
+#include "llvm/TableGen/Error.h"
 #include "llvm/TableGen/Record.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/STLExtras.h"
@@ -124,9 +125,9 @@ CodeGenTarget::CodeGenTarget(RecordKeeper &records)
   : Records(records), RegBank(0), SchedModels(0) {
   std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
   if (Targets.size() == 0)
-    throw std::string("ERROR: No 'Target' subclasses defined!");
+    PrintFatalError("ERROR: No 'Target' subclasses defined!");
   if (Targets.size() != 1)
-    throw std::string("ERROR: Multiple subclasses of Target defined!");
+    PrintFatalError("ERROR: Multiple subclasses of Target defined!");
   TargetRec = Targets[0];
 }
 
@@ -160,7 +161,7 @@ Record *CodeGenTarget::getInstructionSet() const {
 Record *CodeGenTarget::getAsmParser() const {
   std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyParsers");
   if (AsmParserNum >= LI.size())
-    throw "Target does not have an AsmParser #" + utostr(AsmParserNum) + "!";
+    PrintFatalError("Target does not have an AsmParser #" + utostr(AsmParserNum) + "!");
   return LI[AsmParserNum];
 }
 
@@ -171,7 +172,7 @@ Record *CodeGenTarget::getAsmParserVariant(unsigned i) const {
   std::vector<Record*> LI =
     TargetRec->getValueAsListOfDefs("AssemblyParserVariants");
   if (i >= LI.size())
-    throw "Target does not have an AsmParserVariant #" + utostr(i) + "!";
+    PrintFatalError("Target does not have an AsmParserVariant #" + utostr(i) + "!");
   return LI[i];
 }
 
@@ -189,7 +190,7 @@ unsigned CodeGenTarget::getAsmParserVariantCount() const {
 Record *CodeGenTarget::getAsmWriter() const {
   std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyWriters");
   if (AsmWriterNum >= LI.size())
-    throw "Target does not have an AsmWriter #" + utostr(AsmWriterNum) + "!";
+    PrintFatalError("Target does not have an AsmWriter #" + utostr(AsmWriterNum) + "!");
   return LI[AsmWriterNum];
 }
 
@@ -256,7 +257,7 @@ CodeGenSchedModels &CodeGenTarget::getSchedModels() const {
 void CodeGenTarget::ReadInstructions() const {
   std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
   if (Insts.size() <= 2)
-    throw std::string("No 'Instruction' subclasses defined!");
+    PrintFatalError("No 'Instruction' subclasses defined!");
 
   // Parse the instructions defined in the .td file.
   for (unsigned i = 0, e = Insts.size(); i != e; ++i)
@@ -272,7 +273,7 @@ GetInstByName(const char *Name,
   DenseMap<const Record*, CodeGenInstruction*>::const_iterator
     I = Insts.find(Rec);
   if (Rec == 0 || I == Insts.end())
-    throw std::string("Could not find '") + Name + "' instruction!";
+    PrintFatalError(std::string("Could not find '") + Name + "' instruction!");
   return I->second;
 }
 
@@ -419,7 +420,7 @@ CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
 
   if (DefName.size() <= 4 ||
       std::string(DefName.begin(), DefName.begin() + 4) != "int_")
-    throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
+    PrintFatalError("Intrinsic '" + DefName + "' does not start with 'int_'!");
 
   EnumName = std::string(DefName.begin()+4, DefName.end());
 
@@ -439,7 +440,7 @@ CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
     // Verify it starts with "llvm.".
     if (Name.size() <= 5 ||
         std::string(Name.begin(), Name.begin() + 5) != "llvm.")
-      throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
+      PrintFatalError("Intrinsic '" + DefName + "'s name does not start with 'llvm.'!");
   }
 
   // If TargetPrefix is specified, make sure that Name starts with
@@ -448,8 +449,8 @@ CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
     if (Name.size() < 6+TargetPrefix.size() ||
         std::string(Name.begin() + 5, Name.begin() + 6 + TargetPrefix.size())
         != (TargetPrefix + "."))
-      throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
-        TargetPrefix + ".'!";
+      PrintFatalError("Intrinsic '" + DefName + "' does not start with 'llvm." +
+        TargetPrefix + ".'!");
   }
 
   // Parse the list of return types.
@@ -481,7 +482,7 @@ CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
 
     // Reject invalid types.
     if (VT == MVT::isVoid)
-      throw "Intrinsic '" + DefName + " has void in result type list!";
+      PrintFatalError("Intrinsic '" + DefName + " has void in result type list!");
 
     IS.RetVTs.push_back(VT);
     IS.RetTypeDefs.push_back(TyEl);
@@ -515,7 +516,7 @@ CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
 
     // Reject invalid types.
     if (VT == MVT::isVoid && i != e-1 /*void at end means varargs*/)
-      throw "Intrinsic '" + DefName + " has void in result type list!";
+      PrintFatalError("Intrinsic '" + DefName + " has void in result type list!");
 
     IS.ParamVTs.push_back(VT);
     IS.ParamTypeDefs.push_back(TyEl);