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b042868c01
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29 Commits

Author SHA1 Message Date
Nadav Rotem
b042868c01 Cost Model: add tables for some avx type-conversion hacks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167480 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-06 19:33:53 +00:00
Nadav Rotem
2d1528b358 Code Model: Improve the accuracy of the zext/sext/trunc vector cost estimation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167412 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-05 22:20:53 +00:00
Nadav Rotem
e623702c22 Implement the cost of abnormal x86 instruction lowering as a table. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167395 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-11-05 19:32:46 +00:00
Nadav Rotem
e57b2cbce6 LoopVectorize: Preserve NSW, NUW and IsExact flags. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167174 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-31 21:40:39 +00:00
Nadav Rotem
0dba9a9a26 Fix a bug in the cost calculation of vector casts. Detect situations where bitcasts cost zero. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167170 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-31 20:52:26 +00:00
Nadav Rotem
5b2c4dc5f8 LoopVectorize: Do not vectorize loops with tiny constant trip counts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167101 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-31 03:31:07 +00:00
Nadav Rotem
462d1ca428 Add support for loops that don't start with Zero. 
This is important for loops in the LAPACK test-suite.
These loops start at 1 because they are auto-converted from fortran.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167084 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-31 00:45:26 +00:00
Nadav Rotem
e709f5b600 LoopVectorize: Add support for write-only loops when the write destination is a single pointer. 
Speedup SciMark by 1%



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167035 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-30 18:36:45 +00:00
Nadav Rotem
cc03331caa LoopVectorize: Fix a bug in the initialization of reduction variables. AND needs to start at all-one 
while XOR, and OR need to start at zero.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167032 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-30 18:12:36 +00:00
Nadav Rotem
f065a84677 1. Fix a bug in getTypeConversion. When a *simple* type is split, we need to return the type of the split result. 
2. Change the maximum vectorization width from 4 to 8.
3. A test for both.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166864 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-27 04:11:32 +00:00
Nadav Rotem
a5a3a61c5f Refactor the VectorTargetTransformInfo interface. 
Add getCostXXX calls for different families of opcodes, such as casts, arithmetic, cmp, etc.

Port the LoopVectorizer to the new API.

The LoopVectorizer now finds instructions which will remain uniform after vectorization. It uses this information when calculating the cost of these instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166836 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-26 23:49:28 +00:00
Nadav Rotem
f563801144 Move the target-specific tests, which require specific backends, to dirs that only run if the target is present. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166796 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-26 18:52:01 +00:00
Nadav Rotem
b6cbb6215c Fix the cost-model test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166722 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-25 21:42:50 +00:00
Nadav Rotem
402a4d616f Add the cpu model to the test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166718 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-25 21:18:42 +00:00
Nadav Rotem
8dbac7b529 Add support for additional reduction variables: AND, OR, XOR. 
Patch by Paul Redmond <paul.redmond@intel.com>.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166649 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-25 00:08:41 +00:00
Nadav Rotem
2652c50f74 Implement a basic cost model for vector and scalar instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166642 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-24 23:47:38 +00:00
Nadav Rotem
50bec6f8c4 LoopVectorizer: Add a basic cost model which uses the VTTI interface. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166620 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-24 20:36:32 +00:00
Nadav Rotem
6457001f31 Use the AliasAnalysis isIdentifiedObj because it also understands mallocs and c++ news. 
PR14158.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166491 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-23 18:44:18 +00:00
Nadav Rotem
782090aa02 Don't crash if the load/store pointer is not a GEP. 
Fix by Shivarama Rao <Shivarama.Rao@amd.com>



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166427 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-22 18:27:56 +00:00
Nadav Rotem
565048e78a Vectorizer: optimize the generation of selects. If the condition is uniform, generate a scalar-cond select (i1 as selector). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166409 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-22 04:38:00 +00:00
Nadav Rotem
bb950854ac Fix a bug in the vectorization of wide load/store operations. 
We used a SCEV to detect that A[X] is consecutive. We assumed that X was
the induction variable. But X can be any expression that uses the induction
for example: X = i + 2;



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166388 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-10-21 06:49:10 +00:00
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