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(parent: 0d93a11) | patch
Ensure that def-side physreg copies are scheduled above any other uses
authorAndrew Trick <atrick@apple.com>
Wed, 23 Mar 2011 20:42:39 +0000 (20:42 +0000)
committerAndrew Trick <atrick@apple.com>
Wed, 23 Mar 2011 20:42:39 +0000 (20:42 +0000)
commitbd47a4a307a54dab25956430442cf4ac103e4158
treeff2e3f55e5317b30e92fcd8b6680239b026f1750tree | snapshot
parent0d93a110e31b384f59d91d6be27388d8ded5f03ccommit | diff
Ensure that def-side physreg copies are scheduled above any other uses
so the scheduler can't create new interferences on the copies
themselves. Prior to this fix the scheduler could get stuck in a loop
creating copies.
Fixes PR9509.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128164 91177308-0d34-0410-b5e6-96231b3b80d8
lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors