Vectorization in Default Kernel Creation Driver

Reintroduce vectorization into the default create_kernel driver.

• Encapsulate the driver into a class structure
• Update vectorization options and parse deprecated cpu_vectorize_info options in CreateKernelConfig
• Add automatic vectorization in the kernel creation driver

Fixes on the side

• Remove late constant folding in create_kernel; fold indices in LowerToC instead
  • This is required because at this late point, the AST may contain intrinsics, which the constant folder cannot handle
• Clarify some docstrings and exception strings
• Extend domain kernel test cases with vector targets

Closes #108 (closed)

src/pystencils/backend/transformations/lower_to_c.py

@@ -18,7 +18,7 @@ from ..ast.expressions import (
     PsCast,
     PsSymbolExpr,
 )
-from ...types import PsType, PsStructType, PsPointerType, PsUnsignedIntegerType
+from ...types import PsStructType, PsPointerType, PsUnsignedIntegerType
 
 
 class LowerToC: