4cb8cdab5e
LoopVectorize: Preserve NSW, NUW and IsExact flags.
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llvm-svn: 167174
2012-10-31 21:40:39 +00:00
b3e8e688da
LoopVectorize: Fix a bug in the initialization of reduction variables. AND needs to start at all-one
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while XOR, and OR need to start at zero.
llvm-svn: 167032
2012-10-30 18:12:36 +00:00
5ffb049a55
Add support for additional reduction variables: AND, OR, XOR.
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Patch by Paul Redmond <paul.redmond@intel.com>.
llvm-svn: 166649
2012-10-25 00:08:41 +00:00
a721b21c64
LoopVectorizer: Add a basic cost model which uses the VTTI interface.
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llvm-svn: 166620
2012-10-24 20:36:32 +00:00
c1679a95b6
Add support for reduction variables that do not start at zero.
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This is important for nested-loop reductions such as :
In the innermost loop, the induction variable does not start with zero:
for (i = 0 .. n)
for (j = 0 .. m)
sum += ...
llvm-svn: 166387
2012-10-21 05:52:51 +00:00
4f7f72702b
Vectorizer: Add support for loop reductions.
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For example:
for (i=0; i<n; i++)
sum += A[i] + B[i] + i;
llvm-svn: 166351
2012-10-19 23:05:40 +00:00
Nadav Rotem