Convert Constant->emit() definitions to allow multiple targets to define them.

src/IceTargetLoweringARM32.cpp

 //===- subzero/src/IceTargetLoweringARM32.cpp - ARM32 lowering ------------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the TargetLoweringARM32 class, which consists almost
@@ skipping 684 matching lines @@
 }
 
 void TargetARM32::makeRandomRegisterPermutation(
     llvm::SmallVectorImpl<int32_t> &Permutation,
     const llvm::SmallBitVector &ExcludeRegisters) const {
   (void)Permutation;
   (void)ExcludeRegisters;
   UnimplementedError(Func->getContext()->getFlags());
 }
 
-/* TODO(jvoung): avoid duplicate symbols with multiple targets.
-void ConstantUndef::emitWithoutDollar(GlobalContext *) const {
-  llvm_unreachable("Not expecting to emitWithoutDollar undef");
+void TargetARM32::emit(const ConstantInteger32 *C) const {
+  if (!ALLOW_DUMP)
+    return;
+  Ostream &Str = Ctx->getStrEmit();
+  Str << getConstantPrefix() << C->getValue();
 }
 
-void ConstantUndef::emit(GlobalContext *) const {
-  llvm_unreachable("undef value encountered by emitter.");
+void TargetARM32::emit(const ConstantInteger64 *) const {
+  llvm::report_fatal_error("Not expecting to emit 64-bit integers");
 }
-*/
+
+void TargetARM32::emit(const ConstantFloat *C) const {
+  UnimplementedError(Ctx->getFlags());
+}
+
+void TargetARM32::emit(const ConstantDouble *C) const {
+  UnimplementedError(Ctx->getFlags());
+}
+
+void TargetARM32::emit(const ConstantUndef *) const {
+  llvm::report_fatal_error("undef value encountered by emitter.");
+}
 
 TargetDataARM32::TargetDataARM32(GlobalContext *Ctx)
     : TargetDataLowering(Ctx) {}
 
 void TargetDataARM32::lowerGlobal(const VariableDeclaration &Var) const {
   (void)Var;
   UnimplementedError(Ctx->getFlags());
 }
 
 void TargetDataARM32::lowerGlobals(
@@ skipping 16 matching lines @@
   }
 }
 
 void TargetDataARM32::lowerConstants() const {
   if (Ctx->getFlags().getDisableTranslation())
     return;
   UnimplementedError(Ctx->getFlags());
 }
 
 } // end of namespace Ice