Fix the root cause of the bootstrap failure:

There was no way to check if a given register/mode pair was valid. We now return
an error code (-2) instead of asserting. If anyone thinks that an assert
at this point  is really needed, we can autogen a hasValidDwarfRegNum instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132236 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 7 deletions

diff --git a/utils/TableGen/RegisterInfoEmitter.cpp b/utils/TableGen/RegisterInfoEmitter.cpp
index 017a585646..dc263b1177 100644
--- a/utils/TableGen/RegisterInfoEmitter.cpp
+++ b/utils/TableGen/RegisterInfoEmitter.cpp
@@ -1010,13 +1010,8 @@ void RegisterInfoEmitter::run(raw_ostream &OS) {
     for (DwarfRegNumsMapTy::iterator
            I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I) {
       int RegNo = I->second[i];
-      if (RegNo != -2)
-        OS << "    case " << getQualifiedName(I->first) << ":\n"
-           << "      return " << RegNo << ";\n";
-      else
-        OS << "    case " << getQualifiedName(I->first) << ":\n"
-           << "      assert(0 && \"Invalid register for this mode\");\n"
-           << "      return -1;\n";
+      OS << "    case " << getQualifiedName(I->first) << ":\n"
+         << "      return " << RegNo << ";\n";
     }
     OS << "    };\n";
   }