[ARM] GlobalISel: Use TableGen instruction selector

Emit and use the TableGen instruction selector for ARM. At the moment,
this allows us to remove the hand-written code for selecting G_SDIV and
G_UDIV.

Future commits will focus on increasing the code coverage for it and
removing more dead code from the current instruction selector.

llvm-svn: 301905

1 files changed, 9 insertions, 3 deletions

diff --git a/llvm/utils/TableGen/GlobalISelEmitter.cpp b/llvm/utils/TableGen/GlobalISelEmitter.cpp
index a25429ba460..65a1ea2f0f2 100644
--- a/llvm/utils/TableGen/GlobalISelEmitter.cpp
+++ b/llvm/utils/TableGen/GlobalISelEmitter.cpp
@@ -854,7 +854,9 @@ public:
   }
 
   void emitCxxRenderStmts(raw_ostream &OS, RuleMatcher &Rule) const override {
-    OS << "    MIB.addReg(" << RegisterDef->getValueAsString("Namespace")
+    OS << "    MIB.addReg(" << (RegisterDef->getValue("Namespace")
+                                    ? RegisterDef->getValueAsString("Namespace")
+                                    : "")
        << "::" << RegisterDef->getName() << ");\n";
   }
 };
@@ -987,12 +989,16 @@ public:
            << ");\n";
 
         for (auto Def : I->ImplicitDefs) {
-          auto Namespace = Def->getValueAsString("Namespace");
+          auto Namespace = Def->getValue("Namespace")
+                               ? Def->getValueAsString("Namespace")
+                               : "";
           OS << "    MIB.addDef(" << Namespace << "::" << Def->getName()
              << ", RegState::Implicit);\n";
         }
         for (auto Use : I->ImplicitUses) {
-          auto Namespace = Use->getValueAsString("Namespace");
+          auto Namespace = Use->getValue("Namespace")
+                               ? Use->getValueAsString("Namespace")
+                               : "";
           OS << "    MIB.addUse(" << Namespace << "::" << Use->getName()
              << ", RegState::Implicit);\n";
         }