llvm-project/llvm/test/Transforms/SLPVectorizer/X86/lit.local.cfg

if not 'X86' in config.root.targets:
    config.unsupported = True
Reduce verbiage of lit.local.cfg files We can just split targets_to_build in one place and make it immutable. llvm-svn: 210496 2014-06-10 06:42:55 +08:00			`if not 'X86' in config.root.targets:`
Add support for bottom-up SLP vectorization infrastructure. This commit adds the infrastructure for performing bottom-up SLP vectorization (and other optimizations) on parallel computations. The infrastructure has three potential users: 1. The loop vectorizer needs to be able to vectorize AOS data structures such as (sum += A[i] + A[i+1]). 2. The BB-vectorizer needs this infrastructure for bottom-up SLP vectorization, because bottom-up vectorization is faster to compute. 3. A loop-roller needs to be able to analyze consecutive chains and roll them into a loop, in order to reduce code size. A loop roller does not need to create vector instructions, and this infrastructure separates the chain analysis from the vectorization. This patch also includes a simple (100 LOC) bottom up SLP vectorizer that uses the infrastructure, and can vectorize this code: void SAXPY(int x, int y, int a, int i) { x[i] = a * x[i] + y[i]; x[i+1] = a * x[i+1] + y[i+1]; x[i+2] = a * x[i+2] + y[i+2]; x[i+3] = a * x[i+3] + y[i+3]; } llvm-svn: 179117 2013-04-10 03:44:35 +08:00			`config.unsupported = True`