tejohnson marked 2 inline comments as done.
tejohnson added inline comments.

Comment at: include/clang/Driver/Options.td:2255
   HelpText<"Save intermediate compilation results.">;
-def save_temps : Flag<["-", "--"], "save-temps">, Flags<[DriverOption]>,
+def save_temps : Flag<["-", "--"], "save-temps">, Flags<[CC1Option, 
   Alias<save_temps_EQ>, AliasArgs<["cwd"]>,
pcc wrote:
> This is still just a DriverOption, right?
No, we need to pass to cc1 to get it into the CodeGenOptions. See the changes 
to Clang.cpp (passes to cc1 invocation) and CompilerInvocation.cpp (consumes 
during cc1 invocation).

Comment at: lib/Frontend/CompilerInvocation.cpp:747
+            .Case("obj", FrontendOpts.OutputFile)
+            .Default("./" +
+                     llvm::sys::path::filename(FrontendOpts.OutputFile).str());
pcc wrote:
> Why do you need the `"./"` part?
Not needed, removed.

Comment at: test/CodeGen/thinlto_backend.ll:30
 ; Ensure f2 was imported
-; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t3.o -x ir %t1.o -c 
+; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t3.o -x ir %t1.o -c 
-fthinlto-index=%t.thinlto.bc -save-temps=obj
 ; RUN: llvm-nm %t3.o | FileCheck --check-prefix=CHECK-OBJ %s
pcc wrote:
> Should there be another test for `-save-temps=cwd`?
Added -save-temps=cwd and -save-temps

  rC Clang


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