Fix testcase name.
Strip comments during parsing.
Handle nocapture arg keyword and tags (!tbaa, etc.)
Implement phi opcode parsing.
Parse getelementptr inst properly.
Render metadata args (strings) as is.
Handle align and metadata in load instruction during parsing and dumping.

Metadata storing may be not llvmpy-compatible, TODO: fix that.
Fix phi parsing.
Parse/dump readonly func attribute (llvmpy doesn't seem to support this).
Properly support nocapture arg attribute.
Capture and render original comments in assembly, for improved roundtrip.
Add strlen.c/strlen.ll and roundtrip test for it (fails so far).