[PATCH] D108837: [SimplifyCFG] Ignore free instructions when computing cost for folding branch to common dest

[Arthur Eubanks via Phabricator via llvm-commits]

aeubanks added inline comments.


================
Comment at: llvm/test/Transforms/PhaseOrdering/X86/vector-reductions-logical.ll:142
   %cmp14 = fcmp olt double %conv13, 0.000000e+00
   br i1 %cmp14, label %if.then, label %lor.lhs.false16
 
----------------
Now this branch is getting folded into the next basic block. Then at the end of -O2 when every `fpext` is eliminated, the final simplifycfg will fold every branch (since each block only consists of at most one extra instruction besides the cmp and branch), except for this block which is now slightly bigger.
Any ideas on how to fix this?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D108837/new/

https://reviews.llvm.org/D108837