Fix a problem where the AArch64 ELF assembler was failing with

-no-exec-stack. This was due to it not deriving from the correct
asm info base class and missing the override for the exec
stack section query. Added another line to the noexec test
line to make sure this doesn't regress.

llvm-svn: 227074

llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCAsmInfo.h

@@ -15,6 +15,7 @@
 #define LLVM_LIB_TARGET_AARCH64_MCTARGETDESC_AARCH64MCASMINFO_H
 
 #include "llvm/MC/MCAsmInfoDarwin.h"
+#include "llvm/MC/MCAsmInfoELF.h"
 
 namespace llvm {
 class Target;
@@ -27,7 +28,7 @@ struct AArch64MCAsmInfoDarwin : public MCAsmInfoDarwin {
                               MCStreamer &Streamer) const override;
 };
 
-struct AArch64MCAsmInfoELF : public MCAsmInfo {
+struct AArch64MCAsmInfoELF : public MCAsmInfoELF {
   explicit AArch64MCAsmInfoELF(StringRef TT);
 };
 

llvm/test/MC/ELF/noexec.s

@@ -1,4 +1,5 @@
 // RUN: llvm-mc -no-exec-stack -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | llvm-readobj -s -t | FileCheck  %s
+// RUN: llvm-mc -no-exec-stack -filetype=obj -triple aarch64-linux-gnu %s -o - | llvm-readobj -s -t | FileCheck %s
 
 // CHECK:        Section {
 // CHECK:          Index: 4