Add UMULL to ARM integrated assembler.

src/IceInstARM32.cpp

Index: src/IceInstARM32.cpp
diff --git a/src/IceInstARM32.cpp b/src/IceInstARM32.cpp
index 9e6a4809a93b92b13eeaa11bbdb18d50f0897cb5..01d672afa7be3a4b5f703e6ba0f86f96cbc0f42f 100644
--- a/src/IceInstARM32.cpp
+++ b/src/IceInstARM32.cpp
@@ -1374,6 +1374,14 @@ void InstARM32Umull::emit(const Cfg *Func) const {
   getSrc(1)->emit(Func);
 }
 
+void InstARM32Umull::emitIAS(const Cfg *Func) const {
+  assert(getSrcSize() == 2);
+  auto *Asm = Func->getAssembler<ARM32::AssemblerARM32>();
+  Asm->umull(getDest(), DestHi, getSrc(0), getSrc(1), getPredicate());
+  if (Asm->needsTextFixup())
+    emitUsingTextFixup(Func);
+}
+
 void InstARM32Umull::dump(const Cfg *Func) const {
   if (!BuildDefs::dump())
     return;