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# Automatically formatted with yapf (https://github.com/google/yapf)
"""Utility functions for creating and manipulating LLVM 'opt' NPM pipeline objects."""
def fromStr(pipeStr):
"""Create pipeline object from string representation."""
stack = []
curr = []
tok = ''
kind = ''
for c in pipeStr:
if c == ',':
if tok != '':
curr.append([None, tok])
tok = ''
elif c == '(':
stack.append([kind, curr])
kind = tok
curr = []
tok = ''
elif c == ')':
if tok != '':
curr.append([None, tok])
tok = ''
oldKind = kind
oldCurr = curr
[kind, curr] = stack.pop()
curr.append([oldKind, oldCurr])
else:
tok += c
if tok != '':
curr.append([None, tok])
return curr
def toStr(pipeObj):
"""Create string representation of pipeline object."""
res = ''
lastIdx = len(pipeObj) - 1
for i, c in enumerate(pipeObj):
if c[0]:
res += c[0] + '('
res += toStr(c[1])
res += ')'
else:
res += c[1]
if i != lastIdx:
res += ','
return res
def count(pipeObj):
"""Count number of passes (pass-managers excluded) in pipeline object."""
cnt = 0
for c in pipeObj:
if c[0]:
cnt += count(c[1])
else:
cnt += 1
return cnt
def split(pipeObj, splitIndex):
"""Create two new pipeline objects by splitting pipeObj in two directly after pass with index splitIndex."""
def splitInt(src, splitIndex, dstA, dstB, idx):
for s in src:
if s[0]:
dstA2 = []
dstB2 = []
idx = splitInt(s[1], splitIndex, dstA2, dstB2, idx)
dstA.append([s[0], dstA2])
dstB.append([s[0], dstB2])
else:
if idx <= splitIndex:
dstA.append([None, s[1]])
else:
dstB.append([None, s[1]])
idx += 1
return idx
listA = []
listB = []
splitInt(pipeObj, splitIndex, listA, listB, 0)
return [listA, listB]
def remove(pipeObj, removeIndex):
"""Create new pipeline object by removing pass with index removeIndex from pipeObj."""
def removeInt(src, removeIndex, dst, idx):
for s in src:
if s[0]:
dst2 = []
idx = removeInt(s[1], removeIndex, dst2, idx)
dst.append([s[0], dst2])
else:
if idx != removeIndex:
dst.append([None, s[1]])
idx += 1
return idx
dst = []
removeInt(pipeObj, removeIndex, dst, 0)
return dst
def copy(srcPipeObj):
"""Create copy of pipeline object srcPipeObj."""
def copyInt(dst, src):
for s in src:
if s[0]:
dst2 = []
copyInt(dst2, s[1])
dst.append([s[0], dst2])
else:
dst.append([None, s[1]])
dstPipeObj = []
copyInt(dstPipeObj, srcPipeObj)
return dstPipeObj
def prune(srcPipeObj):
"""Create new pipeline object by removing empty pass-managers (those with count = 0) from srcPipeObj."""
def pruneInt(dst, src):
for s in src:
if s[0]:
if count(s[1]):
dst2 = []
pruneInt(dst2, s[1])
dst.append([s[0], dst2])
else:
dst.append([None, s[1]])
dstPipeObj = []
pruneInt(dstPipeObj, srcPipeObj)
return dstPipeObj
if __name__ == "__main__":
import unittest
class Test(unittest.TestCase):
def test_0(self):
pipeStr = 'a,b,A(c,B(d,e),f),g'
pipeObj = fromStr(pipeStr)
self.assertEqual(7, count(pipeObj))
self.assertEqual(pipeObj, pipeObj)
self.assertEqual(pipeObj, prune(pipeObj))
self.assertEqual(pipeObj, copy(pipeObj))
self.assertEqual(pipeStr, toStr(pipeObj))
self.assertEqual(pipeStr, toStr(prune(pipeObj)))
self.assertEqual(pipeStr, toStr(copy(pipeObj)))
[pipeObjA, pipeObjB] = split(pipeObj, 3)
self.assertEqual('a,b,A(c,B(d))', toStr(pipeObjA))
self.assertEqual('A(B(e),f),g', toStr(pipeObjB))
self.assertEqual('b,A(c,B(d,e),f),g', toStr(remove(pipeObj, 0)))
self.assertEqual('a,b,A(c,B(d,e),f)', toStr(remove(pipeObj, 6)))
pipeObjC = remove(pipeObj, 4)
self.assertEqual('a,b,A(c,B(d),f),g', toStr(pipeObjC))
pipeObjC = remove(pipeObjC, 3)
self.assertEqual('a,b,A(c,B(),f),g', toStr(pipeObjC))
pipeObjC = prune(pipeObjC)
self.assertEqual('a,b,A(c,f),g', toStr(pipeObjC))
unittest.main()
exit(0)
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