Re-commit r192758 - MC: quote tricky symbol names in asm output

The reason this got reverted was that the @feat.00 symbol which was emitted
for every TU became quoted, and on cygwin/mingw we use the gas assembler which
couldn't handle the quotes.

This commit fixes the problem by only emitting @feat.00 for win32, where we use
clang -cc1as to assemble. gas would just drop this symbol anyway, so there is no
loss there.

With @feat.00 gone, there shouldn't be quoted symbols showing up on cygwin since
it uses the Itanium ABI, which doesn't put these funny characters in symbols.

> Because of win32 mangling, we produce symbol and section names with
> funny characters in them, most notably @ characters.
>
> MC would choke on trying to parse its own assembly output. This patch addresses
> that by:
>
> - Making @ trigger quoting of symbol names
> - Also quote section names in the same way
> - Just parse section names like other identifiers (to allow for quotes)
> - Don't assume @ signifies a symbol variant if it is in a string.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192859 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 2 deletions

diff --git a/test/CodeGen/X86/stdcall.ll b/test/CodeGen/X86/stdcall.ll
index 73826ed0b2..34f90c5ee3 100644
--- a/test/CodeGen/X86/stdcall.ll
+++ b/test/CodeGen/X86/stdcall.ll
@@ -5,7 +5,7 @@
 
 define internal x86_stdcallcc void @MyFunc() nounwind {
 entry:
-; CHECK: MyFunc@0:
+; CHECK: "_MyFunc@0":
 ; CHECK: ret
   ret void
 }
@@ -20,5 +20,5 @@ entry:
 
 @B = global %0 { void (...)* bitcast (void ()* @MyFunc to void (...)*) }, align 4
 ; CHECK: _B:
-; CHECK: .long _MyFunc@0
+; CHECK: .long "_MyFunc@0"