5 Commits

Author	SHA1	Message	Date
Owen Anderson	f8addbb0a1	Fix batch of converting RegisterPass<> to INTIALIZE_PASS(). ... llvm-svn: 109045	2010-07-21 22:09:45 +00:00
Jakob Stoklund Olesen	bcee53a2b8	Remove many calls to TII::isMoveInstr. Targets should be producing COPY anyway. ... TII::isMoveInstr is going tobe completely removed. llvm-svn: 108507	2010-07-16 04:45:42 +00:00
Jakob Stoklund Olesen	dba28ee3d8	Detect and handle COPY in many places. ... This code is transitional, it will soon be possible to eliminate isExtractSubreg, isInsertSubreg, and isMoveInstr in most places. llvm-svn: 107547	2010-07-03 00:04:37 +00:00
Bob Wilson	5d66f81412	Besides removing phi cycles that reduce to a single value, also remove dead ... phi cycles. Adjust a few tests to keep dead instructions from being optimized away. This (together with my previous change for phi cycles) fixes Apple radar 7627077. llvm-svn: 96057	2010-02-13 00:31:44 +00:00
Bob Wilson	2fd80c3d94	Add a new pass on machine instructions to optimize away PHI cycles that ... reduce down to a single value. InstCombine already does this transformation but DAG legalization may introduce new opportunities. This has turned out to be important for ARM where 64-bit values are split up during type legalization: InstCombine is not able to remove the PHI cycles on the 64-bit values but the separate 32-bit values can be optimized. I measured the compile time impact of this (running llc on 176.gcc) and it was not significant. llvm-svn: 95951	2010-02-12 01:30:21 +00:00