[AArch64][ELF] Section alignment of 4 for AArch64 instruction

The integrated assembler sets a minimum alignment for the .text section of 4. However user defined sections get an alignment of 1. Unlike the GNU assembler which raises the section alignment to 4 if an AArch64 instruction is used, the integrated assembler leaves the alignment at 1

Author: flopop01

llvm/lib/Target/AArch64/MCTargetDesc/AArch64ELFStreamer.cpp

@@ -327,9 +327,8 @@ class AArch64ELFStreamer : public MCELFStreamer {
     MCELFStreamer::changeSection(Section, Subsection);
 
     // Section alignment of 4 to match GNU Assembler
-    if ((Section->getAlign() < 4) && Section->isText()) {
+    if ((Section->getAlign() < 4) && Section->isText())
       Section->setAlignment(Align(4));
-    }
   }
 
   // Reset state between object emissions

llvm/test/MC/AArch64/directive-arch-section-alignment.s

@@ -1,6 +1,5 @@
 // RUN: llvm-mc -triple=aarch64-none-linux-gnu -filetype=obj -o %t.obj %s
-// RUN: llvm-readobj -S --sd %t.obj | FileCheck %s  --check-prefix=CHECK-OBJ
-// RUN: llvm-readelf -s  %t.obj | FileCheck %s --check-prefix=CHECK-ELF
+// RUN: llvm-readobj -S --sd %t.obj | FileCheck %s
 
 .section sec00, "ax"
 .byte 1
@@ -17,28 +16,13 @@ nop
 nop
 nop
 
-// CHECK-OBJ: Name: sec00
-// CHECK-OBJ-NEXT: Type: SHT_PROGBITS (0x1)
-// CHECK-OBJ-NEXT: Flags [ (0x6)
-// CHECK-OBJ: AddressAlignment: 4
-// CHECK-OBJ: Name: sec01
-// CHECK-OBJ-NEXT: Type: SHT_PROGBITS (0x1)
-// CHECK-OBJ-NEXT: Flags [ (0x6)
-// CHECK-OBJ: AddressAlignment: 4
-// CHECK-OBJ: Name: sec02
-// CHECK-OBJ-NEXT: Type: SHT_PROGBITS (0x1)
-// CHECK-OBJ-NEXT: Flags [ (0x6)
-// CHECK-OBJ: Name: sec03
-// CHECK-OBJ-NEXT: Type: SHT_PROGBITS (0x1)
-// CHECK-OBJ-NEXT: Flags [ (0x6)
-// CHECK-OBJ: AddressAlignment: 4
-// CHECK-OBJ: Name: sec04
-// CHECK-OBJ-NEXT: Type: SHT_PROGBITS (0x1)
-// CHECK-OBJ-NEXT: Flags [ (0x3)
-// CHECK-OBJ: AddressAlignment: 1
-
-//CHECK-ELF: sec00             PROGBITS        0000000000000000 000040 000001 00  AX  0   0  4
-//CHECK-ELF-NEXT: sec01             PROGBITS        0000000000000000 000044 000008 00  AX  0   0  4
-//CHECK-ELF-NEXT: sec02             PROGBITS        0000000000000000 00004c 000008 00  AX  0   0  4
-//CHECK-ELF-NEXT: sec03             PROGBITS        0000000000000000 000054 000001 00  AX  0   0  4
-//CHECK-ELF-NEXT: sec04             PROGBITS        0000000000000000 000055 000008 00  WA  0   0  1
+// CHECK: Name: sec00
+// CHECK: AddressAlignment: 4
+// CHECK: Name: sec01
+// CHECK: AddressAlignment: 4
+// CHECK: Name: sec02
+// CHECK: AddressAlignment: 4
+// CHECK: Name: sec03
+// CHECK: AddressAlignment: 4
+// CHECK: Name: sec04
+// CHECK: AddressAlignment: 1