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Summary: Lately, I have submitted a number of patches to fix bugs that
only occurred when using the same pass manager to compile multiple
modules (generally these bugs are failure to reset some persistent
state). Unfortunately I don't think there is currently a way to test
that from the command line. This adds a very simple flag to both llc
and opt, under which the tools will simply re-run their respective
pass pipelines using the same pass manager on (a clone of the same
module). Additionally, we verify that both outputs are bitwise the
same.
Reviewers: yaron.keren
Subscribers: loladiro, yaron.keren, kcc, llvm-commits
Differential Revision: http://reviews.llvm.org/D14965
llvm-svn: 254774
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