[DebugInfo] Support both forward and backward slashes in tests

This addresses test failure revealed by 042c235.

Author: petrhosek

lld/test/COFF/duplicate-dwarf.s

@@ -4,21 +4,21 @@
 # RUN: not lld-link -lldmingw -out:%t.exe %t.o %t.dupl.o -entry:_Z4funcv 2>&1 | FileCheck %s
 
 # CHECK: error: duplicate symbol: func()
-# CHECK-NEXT: >>> defined at /path/to/src{{[/\\]}}dupl.cpp:6
+# CHECK-NEXT: >>> defined at /path{{[/\\]}}to{{[/\\]}}src{{[/\\]}}dupl.cpp:6
 # CHECK-NEXT: >>>            {{.*}}.o
-# CHECK-NEXT: >>> defined at /path/to/src{{[/\\]}}dupl.cpp:6
+# CHECK-NEXT: >>> defined at /path{{[/\\]}}to{{[/\\]}}src{{[/\\]}}dupl.cpp:6
 # CHECK-NEXT: >>>            {{.*}}.o
 # CHECK-EMPTY:
 # CHECK-NEXT: error: duplicate symbol: _var
-# CHECK-NEXT: >>> defined at /path/to/src{{[/\\]}}dupl.cpp:1
+# CHECK-NEXT: >>> defined at /path{{[/\\]}}to{{[/\\]}}src{{[/\\]}}dupl.cpp:1
 # CHECK-NEXT: >>>            {{.*}}.o
-# CHECK-NEXT: >>> defined at /path/to/src{{[/\\]}}dupl.cpp:1
+# CHECK-NEXT: >>> defined at /path{{[/\\]}}to{{[/\\]}}src{{[/\\]}}dupl.cpp:1
 # CHECK-NEXT: >>>            {{.*}}.o
 # CHECK-EMPTY:
 # CHECK-NEXT: error: duplicate symbol: A::namespaceVar
-# CHECK-NEXT: >>> defined at /path/to/src{{[/\\]}}dupl.cpp:3
+# CHECK-NEXT: >>> defined at /path{{[/\\]}}to{{[/\\]}}src{{[/\\]}}dupl.cpp:3
 # CHECK-NEXT: >>>            {{.*}}.o
-# CHECK-NEXT: >>> defined at /path/to/src{{[/\\]}}dupl.cpp:3
+# CHECK-NEXT: >>> defined at /path{{[/\\]}}to{{[/\\]}}src{{[/\\]}}dupl.cpp:3
 # CHECK-NEXT: >>>            {{.*}}.o
 
         .text

lld/test/COFF/undefined-symbol-dwarf.s

@@ -3,11 +3,11 @@
 # RUN: not lld-link /lldmingw /out:%t.exe %t.o /entry:entry 2>&1 | FileCheck %s
 
 # CHECK: error: undefined symbol: bar()
-# CHECK-NEXT: >>> referenced by /path/to/src{{[/\\]}}undef.cpp:17
+# CHECK-NEXT: >>> referenced by /path{{[/\\]}}to{{[/\\]}}src{{[/\\]}}undef.cpp:17
 # CHECK-NEXT: >>>               {{.*}}.o:(entry)
 # CHECK-EMPTY:
 # CHECK-NEXT: error: undefined symbol: foo()
-# CHECK-NEXT: >>> referenced by /path/to/src{{[/\\]}}undef.cpp:7
+# CHECK-NEXT: >>> referenced by /path{{[/\\]}}to{{[/\\]}}src{{[/\\]}}undef.cpp:7
 # CHECK-NEXT: >>>               {{.*}}.o:(A::afunc())
 
         .text

lld/test/ELF/conflict-debug-variable2.s

@@ -7,14 +7,14 @@
 # INPUT-NEXT:    DW_AT_name [DW_FORM_strp]       ( .debug_str[0x00000027] = "foo")
 # INPUT-NEXT:    DW_AT_type [DW_FORM_ref4]       (cu + 0x0033 => {0x00000033} "int")
 # INPUT-NEXT:    DW_AT_external [DW_FORM_flag_present]   (true)
-# INPUT-NEXT:    DW_AT_decl_file [DW_FORM_data1] ("/home/path/test.c")
+# INPUT-NEXT:    DW_AT_decl_file [DW_FORM_data1] ("/home{{[/\\]}}path{{[/\\]}}test.c")
 # INPUT-NEXT:    DW_AT_decl_line [DW_FORM_data1] (1)
 # INPUT-NEXT:    DW_AT_location [DW_FORM_exprloc]        (DW_OP_addr 0x0)
 # INPUT:       DW_TAG_variable
 # INPUT-NEXT:    DW_AT_name [DW_FORM_strp]       ( .debug_str[0x0000002f] = "bar")
 # INPUT-NEXT:    DW_AT_type [DW_FORM_ref4]       (cu + 0x0033 => {0x00000033} "int")
 # INPUT-NEXT:    DW_AT_external [DW_FORM_flag_present]   (true)
-# INPUT-NEXT:    DW_AT_decl_file [DW_FORM_data1] ("/home/path/test.c")
+# INPUT-NEXT:    DW_AT_decl_file [DW_FORM_data1] ("/home{{[/\\]}}path{{[/\\]}}test.c")
 # INPUT-NEXT:    DW_AT_decl_line [DW_FORM_data1] (2)
 # INPUT-NEXT:    DW_AT_location [DW_FORM_exprloc]        (DW_OP_addr 0x0)
 

lld/test/wasm/debuginfo.test

@@ -16,21 +16,21 @@ CHECK-NEXT:                DW_AT_low_pc
 CHECK-NEXT:                DW_AT_high_pc
 CHECK-NEXT:                DW_AT_frame_base
 CHECK-NEXT:                DW_AT_name	("test")
-CHECK-NEXT:                DW_AT_decl_file	("/Users/yury/llvmwasm{{(/|\\)}}hi.c")
+CHECK-NEXT:                DW_AT_decl_file	("/Users{{[/\\]}}yury{{[/\\]}}llvmwasm{{(/|\\)}}hi.c")
 CHECK-NEXT:                DW_AT_decl_line	(3)
 CHECK-NEXT:                DW_AT_prototyped	(true)
 
 CHECK:     DW_TAG_formal_parameter
 CHECK-NEXT:                  DW_AT_name	("t")
-CHECK-NEXT:                  DW_AT_decl_file	("/Users/yury/llvmwasm{{(/|\\)}}hi.c")
+CHECK-NEXT:                  DW_AT_decl_file	("/Users{{[/\\]}}yury{{[/\\]}}llvmwasm{{(/|\\)}}hi.c")
 CHECK-NEXT:                  DW_AT_decl_line	(3)
 
 CHECK:   DW_TAG_subprogram
 CHECK-NEXT:                DW_AT_low_pc
 CHECK-NEXT:                DW_AT_high_pc
 CHECK-NEXT:                DW_AT_frame_base
 CHECK-NEXT:                DW_AT_name	("_start")
-CHECK-NEXT:                DW_AT_decl_file	("/Users/yury/llvmwasm{{(/|\\)}}hi.c")
+CHECK-NEXT:                DW_AT_decl_file	("/Users{{[/\\]}}yury{{[/\\]}}llvmwasm{{(/|\\)}}hi.c")
 CHECK-NEXT:                DW_AT_decl_line	(7)
 
 CHECK:   DW_TAG_base_type