base case, nfc

Author: Chen Zheng

llvm/test/tools/llvm-symbolizer/Inputs/xcoff-dwarf.o

@@ -0,0 +1,63 @@
+
+RUN: llvm-symbolizer --obj=%p/Inputs/xcoff-dwarf.o 'DATA 0x60' \
+RUN:    'DATA 0x61' 'DATA 0x64' 'DATA 0X68' 'DATA 0x90' 'DATA 0x94' \
+RUN:    'DATA 0X98' | FileCheck %s
+
+CHECK: bss_global
+CHECK-NEXT: 96 4
+CHECK-NEXT: ??:?
+CHECK-EMPTY:
+
+CHECK: bss_global
+CHECK-NEXT: 96 4
+CHECK-NEXT: ??:?
+CHECK-EMPTY:
+
+CHECK: data_global
+CHECK-NEXT: 100 4
+CHECK-NEXT: ??:?
+CHECK-EMPTY:
+
+CHECK: str
+CHECK-NEXT: 104 4
+CHECK-NEXT: ??:?
+CHECK-EMPTY:
+
+FIXME: fix the wrong size 152
+CHECK: f()::function_global
+CHECK-NEXT: 144 152
+CHECK-NEXT: ??:?
+CHECK-EMPTY:
+
+FIXME: fix the wrong size 152
+CHECK: beta
+CHECK-NEXT: 148 152
+CHECK-NEXT: ??:?
+CHECK-EMPTY:
+
+FIXME: fix the wrong size 152
+CHECK: alpha
+CHECK-NEXT: 152 152
+CHECK-NEXT: ??:?
+CHECK-EMPTY:
+
+The case is from `test/tools/llvm-symbolizer/data-location.yaml`, compiled with:
+ clang++ -g -gdwarf-3 -O3 t.cpp  -nostdlib  -target powerpc-aix-ibm-xcoff \
+   -mllvm -ppc-global-merge=false
+
+     cat t.cpp
+     1	int bss_global;
+     2	int data_global = 2;
+     3
+     4	const char* str =
+     5	  "12345678";
+     6
+     7	int* f() {
+     8	  static int function_global;
+     9	  return &function_global;
+    10	}
+    11
+    12	static int alpha;
+    13	static int beta;
+    14	int *f(bool b) { return beta ? &alpha : β }
+    15