Add the trap instruction to the integrated ARM assembler.

src/IceInstARM32.cpp

Index: src/IceInstARM32.cpp
diff --git a/src/IceInstARM32.cpp b/src/IceInstARM32.cpp
index 93bbb2769b2db2e1e7027c614765415e557e2856..c32fcaa55c795bcd29fead5eb3d0c6716b25b671 100644
--- a/src/IceInstARM32.cpp
+++ b/src/IceInstARM32.cpp
@@ -1948,6 +1948,12 @@ void InstARM32Trap::emit(const Cfg *Func) const {
   }
 }
 
+void InstARM32Trap::emitIAS(const Cfg *Func) const {
+  auto *Asm = Func->getAssembler<ARM32::AssemblerARM32>();
+  Asm->trap();
+  assert(!Asm->needsTextFixup());
+}
+
 void InstARM32Trap::dump(const Cfg *Func) const {
   if (!BuildDefs::dump())
     return;