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2013 Jan 29
1
[LLVMdev] [PATCH] parallel loop awareness to the LoopVectorizer
...e same function context.
The mem accesses in the parallel loop iteration could have a metadata
"llvm.mem.parallel_loop_iter 0 0" or similar where the first id is a
loop id, the latter the iteration id. Restricted pointer mem accesses
could use metadata "llvm.mem.restrict my_function my_pointer". A parallel
loop alias analyzer can use the parallel_loop_iter metadata (if loop id
equals but iteration id doesn't, return NO_ALIAS) and a restrict pointer
AA use the latter (if both of the queried pointers have it and it differs
for the pointer part only, return NO_ALIAS).
--
--Pekk...
2013 Jan 29
0
[LLVMdev] [PATCH] parallel loop awareness to the LoopVectorizer
On 01/28/2013 12:58 PM, Pekka Jääskeläinen wrote:
> 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
2013 Jan 28
6
[LLVMdev] [PATCH] parallel loop awareness to the LoopVectorizer
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"