Chandler Carruth 5cd79bc14c Perform partial SROA on the helper hashing structure. I really wish the ... optimizers could do this for us, but expecting partial SROA of classes with template methods through cloning is probably expecting too much heroics. With this change, the begin/end pointer pairs which indicate the status of each loop iteration are actually passed directly into each layer of the combine_data calls, and the inliner has a chance to see when most of the combine_data function could be deleted by inlining. Similarly for 'length'. We have to be careful to limit the places where in/out reference parameters are used as those will also defeat the inliner / optimizers from properly propagating constants. With this change, LLVM is able to fully inline and unroll the hash computation of small sets of values, such as two or three pointers. These now decompose into essentially straight-line code with no loops or function calls. There is still one code quality problem to be solved with the hashing -- LLVM is failing to nuke the alloca. It removes all loads from the alloca, leaving only lifetime intrinsics and dead(!!) stores to the alloca. =/ Very unfortunate. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154264 91177308-0d34-0410-b5e6-96231b3b80d8		2012-04-07 20:01:31 +00:00
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llvm	Perform partial SROA on the helper hashing structure. I really wish the	2012-04-07 20:01:31 +00:00
llvm-c	Cleanup whitespace and remove unneeded 'extern' keyword on function definitions.	2012-03-31 10:44:20 +00:00