Index: test/CodeGen/asm.c
===================================================================
--- test/CodeGen/asm.c	(revision 161369)
+++ test/CodeGen/asm.c	(working copy)
@@ -220,3 +220,11 @@
 void t26 (__m256i *p) {
   __asm__ volatile("vmovaps  %0, %%ymm0" :: "m" (*(__m256i*)p) : "ymm0");
 }
+
+// Check to make sure AT&T syntax attribute is emitted.
+void t27(void) {
+  asm volatile("nop");
+// CHECK: @t27
+// CHECK: call void asm sideeffect "nop"
+// CHECK: nounwind attdialect
+}
Index: lib/CodeGen/CGStmt.cpp
===================================================================
--- lib/CodeGen/CGStmt.cpp	(revision 161369)
+++ lib/CodeGen/CGStmt.cpp	(working copy)
@@ -1633,6 +1633,7 @@
                          S.isVolatile() || S.getNumOutputs() == 0);
   llvm::CallInst *Result = Builder.CreateCall(IA, Args);
   Result->addAttribute(~0, llvm::Attribute::NoUnwind);
+  Result->addAttribute(~0, llvm::Attribute::ATTDialect);
 
   // Slap the source location of the inline asm into a !srcloc metadata on the
   // call.