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308 Commits

Author SHA1 Message Date
Nadav Rotem
c847872629 Add support for reduction variables that do not start at zero. 
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 += ...



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166387 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-21 05:52:51 +00:00
Nadav Rotem
5a418ba5f5 Vectorizer: fix a bug in the classification of induction/reduction phis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166384 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-21 02:38:01 +00:00
Nadav Rotem
ccaccfa8bf Fix an infinite loop in the loop-vectorizer. 
PR14134.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166379 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-20 20:45:01 +00:00
Nadav Rotem
bf8772ed2c Vectorize: teach cavVectorizeMemory to distinguish between A[i]+=x and A[B[i]]+=x. 
If the pointer is consecutive then it is safe to read and write. If the pointer is non-loop-consecutive then
it is unsafe to vectorize it because we may hit an ordering issue.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166371 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-20 08:26:33 +00:00
Nadav Rotem
5dbe64e2bc Vectorizer: Add support for loop reductions. 
For example:

  for (i=0; i<n; i++)
   sum += A[i] +  B[i] + i;



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166351 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-19 23:05:40 +00:00
Nadav Rotem
89e7b356f2 vectorizer: Add support for reading and writing from the same memory location. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166255 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-19 01:24:18 +00:00
Nadav Rotem
1953ace81d Vectorizer: Add support for loops with an unknown count. For example: 
for (i=0; i<n; i++){
        a[i] = b[i+1] + c[i+3];
     }



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166165 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-18 05:29:12 +00:00
Nadav Rotem
d15c0c7ac1 Add a loop vectorizer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166112 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-17 18:25:06 +00:00