[LLVMdev] [PATCH] parallel loop awareness to the LoopVectorizer

[Pekka Jääskeläinen]

Hi,

Attached is a patch which uses a simple "parallel_loop" metadata attached
to the loop branch instruction in the loop latch for skipping cross-iteration
memory dependency checking in the LoopVectorizer. This was briefly discussed
in the email thread "LoopVectorizer in OpenCL C work group autovectorization".

It also converts the "min iteration count to vectorize" to a parameter so
this can be controlled from the command line.

Comments welcomed.

Thanks in advance,
-- 
Pekka
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