[LLVMbugs] [Bug 7980] RegAllocFast doesn't set correctly kill flag on implicit use registers
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Tue Aug 31 14:54:42 PDT 2010
http://llvm.org/bugs/show_bug.cgi?id=7980
Jakob Stoklund Olesen <stoklund at 2pi.dk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #2 from Jakob Stoklund Olesen <stoklund at 2pi.dk> 2010-08-31 16:54:42 CDT ---
Fixed in r112650, but probably not in the way you were hoping.
%EFLAGS is changed to be an unallocatable register, so RegAllocFast leaves it
alone.
Kill flags should be conservatively correct after RegAllocFast. THat means kill
flags may be missing, but when a kill flag is present, it should be correct.
That is enough to make the register scavenger and machine code verifier happy.
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