Merging r352119:

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r352119 | rnk | 2019-01-24 23:26:51 +0100 (Thu, 24 Jan 2019) | 7 lines

[clang-cl] Ignore space-separated /AI arguments

The /AI flag is for #using directives, which I don't think we support.
This is consistent with how the /I flag is handled by MSVC.  Add a test
for it.

Differential Revision: https://reviews.llvm.org/D57189
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llvm-svn: 355675

Author: zmodem

clang/include/clang/Driver/CLCompatOptions.td

@@ -395,7 +395,7 @@ def _SLASH_Zo_ : CLIgnoredFlag<"Zo-">;
 
 // Unsupported:
 
-def _SLASH_AI : CLJoined<"AI">;
+def _SLASH_AI : CLJoinedOrSeparate<"AI">;
 def _SLASH_Bt : CLFlag<"Bt">;
 def _SLASH_Bt_plus : CLFlag<"Bt+">;
 def _SLASH_clr : CLJoined<"clr">;

clang/test/Driver/cl-options.c

@@ -391,6 +391,7 @@
 // (/Zs is for syntax-only)
 // RUN: %clang_cl /Zs \
 // RUN:     /AIfoo \
+// RUN:     /AI foo_does_not_exist \
 // RUN:     /Bt \
 // RUN:     /Bt+ \
 // RUN:     /clr:pure \