llvm-6502/lib/CodeGen/SelectionDAG
Chris Lattner 089c25ccb3 When emiting a CopyFromReg and the source is already a vreg, do not bother
creating a new vreg and inserting a copy: just use the input vreg directly.

This speeds up the compile (e.g. about 5% on mesa with a debug build of llc)
by not adding a bunch of copies and vregs to be coallesced away.  On mesa,
for example, this reduces the number of intervals from 168601 to 129040
going into the coallescer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23671 91177308-0d34-0410-b5e6-96231b3b80d8
2005-10-09 05:58:56 +00:00
..
DAGCombiner.cpp Lo and behold, the last bits of SelectionDAG.cpp have been moved over. 2005-10-08 00:29:44 +00:00
LegalizeDAG.cpp silence a bogus GCC warning 2005-10-06 17:39:10 +00:00
Makefile Change Library Names Not To Conflict With Others When Installed 2004-10-27 23:18:45 +00:00
ScheduleDAG.cpp When emiting a CopyFromReg and the source is already a vreg, do not bother 2005-10-09 05:58:56 +00:00
SelectionDAG.cpp remove debugging code 2005-10-07 15:31:26 +00:00
SelectionDAGISel.cpp make sure that -view-isel-dags is the input to the isel, not the input to 2005-10-05 06:09:10 +00:00
SelectionDAGPrinter.cpp add a method 2005-10-01 00:17:07 +00:00
TargetLowering.cpp initialize new flag 2005-09-27 22:13:56 +00:00