Give AsmParser an option to control whether it finalizes

the stream.  New demo:

$ clang asm.c -S -o - -emit-llvm | llc -filetype=obj -o t.o
$ otool -tv t.o
t.o:
(__TEXT,__text) section
_foo:
0000000000000000	subq	$0x08,%rsp
0000000000000004	movl	%edi,(%rsp)
0000000000000007	movl	%edi,%eax
0000000000000009	incl	%eax
000000000000000b	movl	%eax,(%rsp)
000000000000000e	movl	%eax,0x04(%rsp)
0000000000000012	addq	$0x08,%rsp
0000000000000016	ret

llvm-svn: 100492

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/MC/MCParser/AsmParser.cpp b/llvm/lib/MC/MCParser/AsmParser.cpp
index 24616b40b8e..4e62689c51e 100644
--- a/llvm/lib/MC/MCParser/AsmParser.cpp
+++ b/llvm/lib/MC/MCParser/AsmParser.cpp
@@ -138,7 +138,7 @@ const AsmToken &AsmParser::Lex() {
   return *tok;
 }
 
-bool AsmParser::Run(bool NoInitialTextSection) {
+bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
   // Create the initial section, if requested.
   //
   // FIXME: Target hook & command line option for initial section.
@@ -190,7 +190,9 @@ bool AsmParser::Run(bool NoInitialTextSection) {
       TheCondState.Ignore != StartingCondState.Ignore)
     return TokError("unmatched .ifs or .elses");
   
-  if (!HadError)  
+  // Finalize the output stream if there are no errors and if the client wants
+  // us to.
+  if (!HadError && !NoFinalize)  
     Out.Finish();
 
   return HadError;