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(parent: 66a7e85) | patch
Add memoization for getSCEVAtScope results for instructions
authorDan Gohman <gohman@apple.com>
Fri, 8 May 2009 20:47:27 +0000 (20:47 +0000)
committerDan Gohman <gohman@apple.com>
Fri, 8 May 2009 20:47:27 +0000 (20:47 +0000)
commit6bce643c36e7263aada5058f08cd242b4ce6b87d
tree95581b83940c6bc94cca278ab8acc1062a7a3ff6tree | snapshot
parent66a7e857aa5843da3a7d0f52aa09a5935cf565dccommit | diff
Add memoization for getSCEVAtScope results for instructions
which are not analyzed with SCEV techniques, which can require
brute-forcing through a large number of instructions. This
fixes a massive compile-time issue on 400.perlbench (in
particular, the loop in MD5Transform).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71259 91177308-0d34-0410-b5e6-96231b3b80d8
include/llvm/Analysis/ScalarEvolution.h diff | blob | history
lib/Analysis/ScalarEvolution.cpp diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors