Matthias Braun 1f67650f77 RegisterCoalescer: Do not look for regclass of IMPLICIT_DEF.
IMPLICIT_DEF is a generic instruction and has no (fixed) output register
class defined. The rematerialization code of the register coalescer
should not scan the instruction description for a register class.

This fixes a problem showing up in
test/CodeGen/R600/subreg-coalescer-crash.ll with subregister liveness
enabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229443 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-16 22:05:12 +00:00
2015-01-30 21:59:28 +00:00
2015-02-04 18:46:00 +00:00

Low Level Virtual Machine (LLVM)
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