[Win32] Rework crash-report since r145389.

  - lib/Driver/Driver.cpp, tools/driver/driver.cpp: Exit status should not be propagated, although clang driver should catch exceptions.
  - test/Driver/crash-report.c: Add REQUIRES:shell for now.
    FIXME: setenv should work also on Lit.InternalShellRunner.
  - test/Driver/crash-report.c: Remove XFAIL.

Thanks to Chad, To point out the issue.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160343 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index a2afb76..7f6fcb1 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -582,14 +582,8 @@
     C.CleanupFileList(C.getResultFiles(), true);
 
     // Failure result files are valid unless we crashed.
-    if (Res < 0) {
+    if (Res < 0)
       C.CleanupFileList(C.getFailureResultFiles(), true);
-#ifdef _WIN32
-      // Exit status should not be negative on Win32,
-      // unless abnormal termination.
-      Res = 1;
-#endif
-    }
   }
 
   // Print extra information about abnormal failures, if possible.
diff --git a/test/Driver/crash-report.c b/test/Driver/crash-report.c
index ffa3753..f9f62da 100644
--- a/test/Driver/crash-report.c
+++ b/test/Driver/crash-report.c
@@ -4,7 +4,7 @@
 // RUN: cat %t/crash-report-*.c | FileCheck --check-prefix=CHECKSRC %s
 // RUN: cat %t/crash-report-*.sh | FileCheck --check-prefix=CHECKSH %s
 // REQUIRES: crash-recovery
-// XFAIL: mingw32,win32
+// REQUIRES: shell
 
 #pragma clang __debug parser_crash
 // CHECK: Preprocessed source(s) and associated run script(s) are located at:
diff --git a/tools/driver/driver.cpp b/tools/driver/driver.cpp
index 7813f35..12a9329 100644
--- a/tools/driver/driver.cpp
+++ b/tools/driver/driver.cpp
@@ -490,5 +490,13 @@
   
   llvm::llvm_shutdown();
 
+#ifdef _WIN32
+  // Exit status should not be negative on Win32, unless abnormal termination.
+  // Once abnormal termiation was caught, negative status should not be
+  // propagated.
+  if (Res < 0)
+    Res = 1;
+#endif
+
   return Res;
 }