[PATCH] D107702: [MemCpyOpt] Optimize MemoryDef insertion
Arthur Eubanks via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Aug 9 12:27:20 PDT 2021
aeubanks added a comment.
this does make memcpyopt not insanely slow for large functions
import sys
count = int(sys.argv[1])
with open(sys.argv[2], 'w') as f:
for i in xrange(count):
f.write('@g{} = global [2 x i64] zeroinitializer\n'.format(i))
f.write('define void @a() {\n')
for i in xrange(count):
f.write(' store [2 x i64] zeroinitializer, [2 x i64]* @g{}\n'.format(i))
f.write(' ret void\n')
f.write('}\n')
$ python /tmp/a.py 100000 /tmp/a.ll
$ opt -passes=memcpyopt -disable-output /tmp/a.ll
for a file with 100000 stores, it previously took 88s, with this patch it takes 1s
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D107702/new/
https://reviews.llvm.org/D107702
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