Chris Lattner 896617b776 Improve ValueAlreadyLiveAtInst with a cheap and dirty, but effective ... heuristic: the value is already live at the new memory operation if it is used by some other instruction in the memop's block. This is cheap and simple to compute (moreso than full liveness). This improves the new heuristic even more. For example, it cuts two out of three new instructions out of 255.vortex:DbmFileInGrpHdr, which is one of the functions that the heuristic regressed. This overall eliminates another 40 instructions from 403.gcc and visibly reduces register pressure in 255.vortex (though this only actually ends up saving the 2 instructions from the whole program). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60084 91177308-0d34-0410-b5e6-96231b3b80d8		2008-11-26 03:20:37 +00:00
..
ADCE.cpp	Let instcombiner remove redundant dbg intrinsics.	2008-11-19 18:59:41 +00:00
BasicBlockPlacement.cpp
CMakeLists.txt	CMake: updated list of source files.	2008-11-05 00:11:22 +00:00
CodeGenPrepare.cpp	Improve ValueAlreadyLiveAtInst with a cheap and dirty, but effective	2008-11-26 03:20:37 +00:00
CondPropagate.cpp
ConstantProp.cpp
DCE.cpp	Decrementing the iterator here could be wrong if the worklist is empty after the "erase".	2008-09-18 23:04:18 +00:00
DeadStoreElimination.cpp	Factorize code: remove variants of "strip off	2008-10-01 15:25:41 +00:00
GVN.cpp	fix memleak by cleaning the global sets on pass exit	2008-10-10 16:25:50 +00:00
GVNPRE.cpp
IndVarSimplify.cpp	Revert r60042. IndVarSimplify should check if APFloat is PPCDoubleDouble first before trying to convert it to an integer.	2008-11-26 01:11:57 +00:00
InstructionCombining.cpp	reapply Sanjiv's patch to genericize memcpy/memset/memmove to take an	2008-11-21 16:42:48 +00:00
JumpThreading.cpp
LICM.cpp	Change create*Pass factory functions to return Pass* instead of	2008-10-22 23:32:42 +00:00
LoopDeletion.cpp	Change create*Pass factory functions to return Pass* instead of	2008-10-22 23:32:42 +00:00
LoopIndexSplit.cpp	If the sign of exit condition and split condition does not match	2008-11-10 19:48:34 +00:00
LoopRotation.cpp	Change create*Pass factory functions to return Pass* instead of	2008-10-22 23:32:42 +00:00
LoopStrengthReduce.cpp	Change create*Pass factory functions to return Pass* instead of	2008-10-22 23:32:42 +00:00
LoopUnroll.cpp	Change create*Pass factory functions to return Pass* instead of	2008-10-22 23:32:42 +00:00
LoopUnswitch.cpp	Ignore conditions that are outside the loop.	2008-11-03 19:38:07 +00:00
Makefile
MemCpyOptimizer.cpp	reapply Sanjiv's patch to genericize memcpy/memset/memmove to take an	2008-11-21 16:42:48 +00:00
PredicateSimplifier.cpp	Silence unused variable warnings.	2008-11-21 20:00:59 +00:00
Reassociate.cpp	Fix build failure.	2008-11-21 21:00:20 +00:00
Reg2Mem.cpp
Scalar.cpp
ScalarReplAggregates.cpp	Allow SROA of vectors. Removing this caused a	2008-11-04 20:54:03 +00:00
SCCP.cpp	Fix unused variable warnings.	2008-11-21 01:52:59 +00:00
SimplifyCFGPass.cpp	Large mechanical patch.	2008-09-25 21:00:45 +00:00
SimplifyHalfPowrLibCalls.cpp	Add a new pass to simplify specific half_powr function calls. This is	2008-11-04 23:41:45 +00:00
SimplifyLibCalls.cpp	reapply Sanjiv's patch to genericize memcpy/memset/memmove to take an	2008-11-21 16:42:48 +00:00
TailDuplication.cpp
TailRecursionElimination.cpp