[CodeGen] Separate X86 and Aarch tests

The directory this test used to live in is exclusive to Aarch.
Addresses the failure reported in D158636.

Author: felipepiovezan

llvm/test/CodeGen/AArch64/dbg-value-swift-async.ll

@@ -2,21 +2,11 @@
 ; RUN: llc --mtriple="aarch64-" -O0 -fast-isel=false -global-isel=false -stop-after=finalize-isel %s -o - | FileCheck %s --check-prefix=AARCH
 ; RUN: llc --mtriple="aarch64-" -O0 -fast-isel -stop-after=finalize-isel %s -o - | FileCheck %s --check-prefix=AARCH
 
-
-; RUN: llc --mtriple="x86_64-" -O0 -fast-isel=false -global-isel=false -stop-after=finalize-isel %s -o - | FileCheck %s --check-prefix=X86
-; RUN: llc --mtriple="x86_64-" -O0 -fast-isel -stop-after=finalize-isel %s -o - | FileCheck %s --check-prefix=X86
-
 ; AARCH-NOT:  DBG_VALUE
 ; AARCH:      DBG_VALUE $x22, $noreg, !{{.*}}, !DIExpression(DW_OP_LLVM_entry_value, 1)
 ; AARCH-NEXT: DBG_VALUE $x22, $noreg, !{{.*}}, !DIExpression(DW_OP_LLVM_entry_value, 1)
 ; AARCH-NOT:  DBG_VALUE
 
-; X86-NOT:  DBG_VALUE
-; X86:      DBG_VALUE $r14, $noreg, !{{.*}}, !DIExpression(DW_OP_LLVM_entry_value, 1)
-; X86-NEXT: DBG_VALUE $r14, $noreg, !{{.*}}, !DIExpression(DW_OP_LLVM_entry_value, 1)
-; X86-NOT:  DBG_VALUE
-
-
 define void @foo(ptr %unused_arg, ptr swiftasync %async_arg) !dbg !6 {
   call void @llvm.dbg.value(metadata ptr %async_arg, metadata !12, metadata !DIExpression(DW_OP_LLVM_entry_value, 1)), !dbg !14
   call void @llvm.dbg.value(metadata ptr %async_arg, metadata !12, metadata !DIExpression(DW_OP_LLVM_entry_value, 1)), !dbg !14

llvm/test/CodeGen/X86/dbg-value-swift-async.ll

@@ -0,0 +1,35 @@
+; RUN: llc --mtriple="x86_64-" -O0 -fast-isel=false -global-isel=false -stop-after=finalize-isel %s -o - | FileCheck %s --check-prefix=X86
+; RUN: llc --mtriple="x86_64-" -O0 -fast-isel -stop-after=finalize-isel %s -o - | FileCheck %s --check-prefix=X86
+
+; X86-NOT:  DBG_VALUE
+; X86:      DBG_VALUE $r14, $noreg, !{{.*}}, !DIExpression(DW_OP_LLVM_entry_value, 1)
+; X86-NEXT: DBG_VALUE $r14, $noreg, !{{.*}}, !DIExpression(DW_OP_LLVM_entry_value, 1)
+; X86-NOT:  DBG_VALUE
+
+
+define void @foo(ptr %unused_arg, ptr swiftasync %async_arg) !dbg !6 {
+  call void @llvm.dbg.value(metadata ptr %async_arg, metadata !12, metadata !DIExpression(DW_OP_LLVM_entry_value, 1)), !dbg !14
+  call void @llvm.dbg.value(metadata ptr %async_arg, metadata !12, metadata !DIExpression(DW_OP_LLVM_entry_value, 1)), !dbg !14
+  call void @consume(ptr %async_arg)
+  ret void, !dbg !15
+}
+
+declare void @llvm.dbg.value(metadata, metadata, metadata)
+declare void @consume(ptr %ptr)
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3, !4}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug)
+!1 = !DIFile(filename: "x.c", directory: "/")
+!3 = !{i32 2, !"Dwarf Version", i32 4}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!6 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, unit: !0)
+!7 = !DISubroutineType(types: !8)
+!8 = !{null, !9, !9, !9}
+!9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64)
+!10 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !11)
+!11 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!12 = !DILocalVariable(name: "a", scope: !6, file: !1, line: 1, type: !9)
+!14 = !DILocation(line: 1, column: 29, scope: !6)
+!15 = !DILocation(line: 1, column: 37, scope: !6)