Improve handling of end of file in the bitcode reader.

Before this patch the bitcode reader would read a module from a file
that contained in order:

* Any number of non MODULE_BLOCK sub blocks.
* One MODULE_BLOCK
* Any number of non MODULE_BLOCK sub blocks.
* 4 '\n' characters to handle OS X's ranlib.

Since we support lazy reading of modules, any information that is relevant
for the module has to be in the MODULE_BLOCK or before it. We don't gain
anything from checking what is after.

This patch then changes the reader to stop once the MODULE_BLOCK has been
successfully parsed.

This avoids the ugly special case for .bc files in an archive and makes it
easier to embed bitcode files.

llvm-svn: 239845

1 files changed, 0 insertions, 0 deletions

diff --git a/llvm/test/Bitcode/Inputs/padding-garbage.bc b/llvm/test/Bitcode/Inputs/padding-garbage.bc
new file mode 100644
index 00000000000..b44b584f4dc
--- /dev/null
+++ b/llvm/test/Bitcode/Inputs/padding-garbage.bc