[PATCH 2/2] sparse, llvm: don't compile erroneous code

["Jonathan Neuschäfer" <j.neuschaefer@gmx.net>]

If sparse emits an error message while parsing a file, don't
generate LLVM code, and also don't parse further files. This
prevents a segfault when sparse-llvm is fed with certain junk.

Cc: Pekka Enberg <penberg@kernel.org>
Cc: Christopher Li <sparse@chrisli.org>
Cc: Jeff Garzik <jgarzik@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
---
 sparse-llvm.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sparse-llvm.c b/sparse-llvm.c
index e4929e9..0fc0dae 100644
--- a/sparse-llvm.c
+++ b/sparse-llvm.c
@@ -1268,7 +1268,10 @@ int main(int argc, char **argv)
 	compile(module, sparse_initialize(argc, argv, &filelist));
 
 	FOR_EACH_PTR_NOTAG(filelist, file) {
-		compile(module, sparse(file));
+		struct symbol_list *symlist = sparse(file);
+		if (error_happened)
+			break;
+		compile(module, symlist);
 	} END_FOR_EACH_PTR_NOTAG(file);
 
 	LLVMVerifyModule(module, LLVMPrintMessageAction, NULL);
-- 
1.7.10.4

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