fix Windows CI

Created using spr 1.3.6

Author: boomanaiden154

llvm/utils/lit/lit/TestRunner.py

@@ -733,7 +733,11 @@ def _replaceReadFile(match):
                 with open(filePath) as fileHandle:
                     return fileHandle.read()
             except FileNotFoundError:
-                raise InternalShellError(cmd, "File does not exist: %s" % filePath)
+                raise InternalShellError(
+                    cmd,
+                    "File specified in readfile substitution does not exist: %s"
+                    % filePath,
+                )
 
         arguments[i] = re.sub(r"%{readfile:([^}]*)}", _replaceReadFile, arg)
 

llvm/utils/lit/tests/shtest-readfile.py

@@ -1,21 +1,21 @@
 ## Tests the readfile substitution.
 
-# RUN: not %{lit} -a -v %{inputs}/shtest-readfile | FileCheck -match-full-lines -DTEMP_PATH=%S/Inputs/shtest-readfile/Output %s
+# RUN: not %{lit} -a -v %{inputs}/shtest-readfile | FileCheck -match-full-lines -DTEMP_PATH=%S%{fs-sep}Inputs%{fs-sep}shtest-readfile%{fs-sep}Output %s
 
 # CHECK: -- Testing: 4 tests{{.*}}
 
 # CHECK-LABEL: FAIL: shtest-readfile :: absolute-paths.txt ({{[^)]*}})
 # CHECK: echo hello
-# CHECK: # executed command: echo '%{readfile:[[TEMP_PATH]]/absolute-paths.txt.tmp}'
+# CHECK: # executed command: echo '%{readfile:[[TEMP_PATH]]{{[\\\/]}}absolute-paths.txt.tmp}'
 
 # CHECK-LABEL: FAIL: shtest-readfile :: file-does-not-exist.txt ({{[^)]*}})
 # CHECK: # executed command: @echo 'echo %{readfile:/file/does/not/exist}'
-# CHECK: # | File does not exist: /file/does/not/exist
+# CHECK: # | File specified in readfile substitution does not exist: /file/does/not/exist
 
 # CHECK-LABEL: FAIL: shtest-readfile :: relative-paths.txt ({{[^)]*}})
 # CHECK: echo hello
 # CHECK: # executed command: echo '%{readfile:rel_path_test_folder/test_file}'
 
 # CHECK-LABEL: FAIL: shtest-readfile :: two-same-line.txt ({{[^)]*}})
 # CHECK: echo hello bye
-# CHECK: # executed command: echo '%{readfile:[[TEMP_PATH]]/two-same-line.txt.tmp.1}' '%{readfile:[[TEMP_PATH]]/two-same-line.txt.tmp.2}'
+# CHECK: # executed command: echo '%{readfile:[[TEMP_PATH]]{{[\\\/]}}two-same-line.txt.tmp.1}' '%{readfile:[[TEMP_PATH]]{{[\\\/]}}two-same-line.txt.tmp.2}'