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+Why hacking on sparse
+=====================
+
+1. sparse is small.  
+   The full project compiles in less than 10 seconds on old and not performing laptop.
+2. sparse is fast.  
+   Typically, sparse can check a C file 1/10 of time it takes for gcc to generate object files.
+3. sparse can digest the full kernel source files.  
+   With sparse-llvm, sparse uses llvm as back end to emit real machine code.
+
+New developer hacking on sparse
+==============================
+
+
+* All sparse warning messages should include the option how
+   to disable it.  
+       e.g. "pre-process.c:20*:28: warning: Variable length array is used."
+       should be something like   
+        "pre-process.c:20*:28: warning: Variable length array is
+used. (-Wno-vla)"
+* extend test-inspect to inspect more AST fields.
+* extend test-inspect to inspect instructions.
+* adding architecture handling in sparse similar to cgcc
+* parallel processing of test-suite
+* Howto: fix the kernel rcu related checker warnings
+* option to disable AST level inline.
+* debug: debug version of sparse do all the verification double check
+* test suite: verify and compare IR (suggested by Dibyendu Majumdar)
+* checker error output database
+
+For experienced developers
+==========================
+
+* merge C type on incremental declare of C type and function prototype.
+* move attribute out of ctype to allow easier to add new attribute.
+* serialize, general object walking driven by data structures.
+* serialize, write sparse byte code into file
+* serialize, load sparse byte code from file.
+* symbol index/linker, know which symbol in which byte code file.
+* inline function in instruction level
+* cross function checking
+* debug: optimization step by step log
+* debug: fancy animation of CFG
+* phi node location (Luc has patch)
+* revisit crazy programmer warning, invalid SSA form.
+* ptrlist, looping while modify inside the loop.
+* dead code elimination using ssa
+* constant propagation using ssa.
+* x86/arm back end instruction set define
+* register allocation.
+* emit x86/arm machine level code
+