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Andrew Trick 92e946630d Introducing a new method of tracking register pressure. We can't 
precisely track pressure on a selection DAG, but we can at least keep
it balanced. This design accounts for various interesting aspects of
selection DAGS: register and subregister copies, glued nodes, dead
nodes, unused registers, etc.

Added SUnit::NumRegDefsLeft and ScheduleDAGSDNodes::RegDefIter.

Note: I disabled PrescheduleNodesWithMultipleUses when register
pressure is enabled, based on no evidence other than I don't think it
makes sense to have both enabled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124853 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-04 03:18:17 +00:00
autoconf
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cmake Changes for building Clang and others using LLVM as an external 2011-02-03 20:57:36 +00:00
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include Introducing a new method of tracking register pressure. We can't 2011-02-04 03:18:17 +00:00
lib Introducing a new method of tracking register pressure. We can't 2011-02-04 03:18:17 +00:00
projects
runtime
test DebugLoc associated with a machine instruction is used to emit location entries. DebugLoc associated with a DBG_VALUE is used to identify lexical scope of the variable. After register allocation, while inserting DBG_VALUE remember original debug location for the first instruction and reuse it, otherwise dwarf writer may be mislead in identifying the variable's scope. 2011-02-04 01:43:25 +00:00
tools
unittests
utils Tidy up a bit. 2011-02-03 23:26:36 +00:00
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CMakeLists.txt Moved to Clang's source tree its configuration options and associated 2011-02-03 22:47:59 +00:00
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Makefile.rules Factor the computation of the basename of libraries. This avoids renaming 2011-02-03 22:01:15 +00:00
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