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(parent: ae94e59) | patch
Ignore IMPLICIT_DEF instructions when computing physreg liveness.
authorDan Gohman <gohman@apple.com>
Fri, 5 Dec 2008 05:30:02 +0000 (05:30 +0000)
committerDan Gohman <gohman@apple.com>
Fri, 5 Dec 2008 05:30:02 +0000 (05:30 +0000)
commit490b1833a96bf0391ebdfba7828d43a8c3512851
treecaee0770eb8daac1f7511a849268210dd8b82a8btree | snapshot
parentae94e594164b193236002516970aeec4c4574768commit | diff
Ignore IMPLICIT_DEF instructions when computing physreg liveness.
While they appear to provide a normal clobbering def, they don't
in the case of the awkward IMPLICIT_DEF+INSERT_SUBREG idiom. It
would be good to change INSERT_SUBREG; until then, this change
allows post-regalloc scheduling to cope in a mildly conservative
way.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60583 91177308-0d34-0410-b5e6-96231b3b80d8
lib/CodeGen/PostRASchedulerList.cpp diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors