Add BL (immediate) and BLX (register) to ARM assembler.

src/IceInstARM32.cpp

 //===- subzero/src/IceInstARM32.cpp - ARM32 instruction implementation ----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 987 matching lines @@
     CallTarget->emitWithoutPrefix(Func->getTarget());
   } else {
     Str << "\t"
         << "blx"
         << "\t";
     getCallTarget()->emit(Func);
   }
   Func->getTarget()->resetStackAdjustment();
 }
 
+void InstARM32Call::emitIAS(const Cfg *Func) const {
+  assert(getSrcSize() == 1);
+  auto *Asm = Func->getAssembler<ARM32::AssemblerARM32>();
+  if (llvm::isa<ConstantInteger32>(getCallTarget())) {
+    // This shouldn't happen (typically have to copy the full 32-bits to a
+    // register and do an indirect jump).
+    llvm::report_fatal_error("ARM32Call to ConstantInteger32");
+  } else if (const auto *CallTarget =
+                 llvm::dyn_cast<ConstantRelocatable>(getCallTarget())) {
+    // Calls only have 24-bits, but the linker should insert veneers to extend
+    // the range if needed.
+    Asm->bl(CallTarget);
+  } else {
+    Asm->blx(getCallTarget());
+  }
+  if (Asm->needsTextFixup())
+    return emitUsingTextFixup(Func);
+  Func->getTarget()->resetStackAdjustment();
+}
+
 void InstARM32Call::dump(const Cfg *Func) const {
   if (!BuildDefs::dump())
     return;
   Ostream &Str = Func->getContext()->getStrDump();
   if (getDest()) {
     dumpDest(Func);
     Str << " = ";
   }
   Str << "call ";
   getCallTarget()->dump(Func);
@@ skipping 907 matching lines @@
 template class InstARM32UnaryopFP<InstARM32::Vsqrt>;
 
 template class InstARM32FourAddrGPR<InstARM32::Mla>;
 template class InstARM32FourAddrGPR<InstARM32::Mls>;
 
 template class InstARM32CmpLike<InstARM32::Cmn>;
 template class InstARM32CmpLike<InstARM32::Cmp>;
 template class InstARM32CmpLike<InstARM32::Tst>;
 
 } // end of namespace Ice