llvm/test/Transforms/LICM/bisect-state.ll at f75dbeb8e7dfbf8a512fa08f4c25509dae63b310 - llvm - Free-Git: DMCA Non-Compliant

RPCS3/llvm

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Davide Italiano 7f2dba153c [LICM] Work around LICM needs to maintain state across loops.

The pass creates some state which expects to be cleaned up by
a later instance of the same pass. opt-bisect happens to expose
this not ideal design because calling skipLoop() will result in
this state not being cleaned up at times and an assertion firing
in `doFinalization()`. Chandler tells me the new pass manager will
give us options to avoid these design traps, but until it's not ready,
we need a workaround for the current pass infrastructure. Fix provided
by Andy Kaylor, see the review for a complete discussion.

Differential Revision:  https://reviews.llvm.org/D25848

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290427 91177308-0d34-0410-b5e6-96231b3b80d8

2016-12-23 13:12:50 +00:00

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 ; Make sure we don't crash in LICM.
 ; RUN: opt %s -licm -opt-bisect-limit=1
 define void @patatino() {
 for.cond1:
   br label %for.body
 for.body:
   br label %for.cond5
 for.cond5:
   br i1 true, label %if.end, label %for.end
 if.end:
   br label %for.cond5
 for.end:
   br label %for.body
 }