[llvm-dev] Getting a list of optimiztions to be applied from opt

[Phil Tomson via llvm-dev]

It was suggested that I could get a list of optimizations that would be
applied given a -ON option as follows:

 $TG_BIN/opt -O2 -disable-output -debug-pass=Arguments some.bc

(for -O2 in this case).

The list that it returned (after removing duplicates) was:

-datalayout -notti -basictti -no-aa -tbaa -scoped-noalias
-assumption-cache-tracker -targetlibinfo -basicaa -verify -simplifycfg
-domtree -sroa -early-cse -lower-expect -verify-di -ipsccp -globalopt
-deadargelim -instcombine -basiccg -prune-eh -inline-cost -inline
-functionattrs -lazy-value-info -jump-threading -correlated-propagation
-tailcallelim -reassociate -loops -loop-simplify -lcssa -loop-rotate -licm
-loop-unswitch -scalar-evolution -indvars -loop-idiom -loop-deletion
-function_tti -loop-unroll -memdep -mldst-motion -gvn -memcpyopt -sccp -dse
-adce -barrier -branch-prob -block-freq -loop-vectorize -slp-vectorizer
-alignment-from-assumptions -strip-dead-prototypes -globaldce -constmerge

However... when I then tried pass these to opt I get:

opt: Unknown command line argument '-basictti'.  Try:
'/home/ptomson/tg/tg/install/bin/opt -help'
opt: Did you mean '-basiccg'?
opt: Unknown command line argument '-verify-di'.  Try:
'/home/ptomson/tg/tg/install/bin/opt -help'
opt: Did you mean '-verify'?


Why is it that I'm getting non-valid optimization arguments returned from:
$TG_BIN/opt -O2 -disable-output -debug-pass=Arguments some.bc

?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20151207/87d5f8b0/attachment.html>