[LLVMbugs] [Bug 20091] Invalid assembly code generated by clang-cl from the inline assembly
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Fri Jun 20 17:18:18 PDT 2014
http://llvm.org/bugs/show_bug.cgi?id=20091
Reid Kleckner <rnk at google.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Reid Kleckner <rnk at google.com> ---
This is an as-yet unsupported aspect of MS inline assembly documented here:
http://msdn.microsoft.com/en-us/library/5sds75we.aspx
MSVC will generate a return sequence for you after inline assembly, even if you
failed to return a value. Clang on the other hand will warn with -Wreturn-type
and transform it to unreachable, because failing to return a value from a
function with a non-void return type is UB. When we add this behavior quirk to
Clang we can make -Wreturn-type quieter.
*** This bug has been marked as a duplicate of bug 17201 ***
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