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312 Commits

Author SHA1 Message Date
Alkis Evlogimenos fd735bcf28 Add method to assign stack slot to virtual register without creating a 
new one.

llvm-svn: 13895
 2004-05-29 20:38:05 +00:00
Alkis Evlogimenos 6623cd78f9 Spill explicit physical register defs as well. 
llvm-svn: 12260
 2004-03-09 08:35:13 +00:00
Alkis Evlogimenos cb98644e9b As I wrote in the docs, simple is the default spiller :-) 
llvm-svn: 12189
 2004-03-06 23:08:44 +00:00
Alkis Evlogimenos 79850121ad Add simple spiller. 
llvm-svn: 12188
 2004-03-06 22:38:29 +00:00
Alkis Evlogimenos 31953c7a10 Add a spiller option to llc. A simple spiller will come soon. When we get CFG in the machine code represenation a global spiller will also be possible. Also document the linear scan register allocator but mark it as experimental for now. 
llvm-svn: 12062
 2004-03-01 23:18:15 +00:00
Alkis Evlogimenos b76d234ee9 Add the long awaited memory operand folding support for linear scan 
llvm-svn: 12058
 2004-03-01 20:05:10 +00:00
Alkis Evlogimenos 941f9310bb Make spiller push stores right after the definition of a register so 
that they are as far away from the loads as possible.

llvm-svn: 11895
 2004-02-27 04:51:35 +00:00
Alkis Evlogimenos 5a3bab9402 Clear maps right after basic block is processed. 
llvm-svn: 11892
 2004-02-26 23:22:23 +00:00
Alkis Evlogimenos e62ddd405d Fix bugs found with recent addition of assertions in 
MRegisterInfo::is{Physical,Virtual}Register.

llvm-svn: 11849
 2004-02-25 23:21:52 +00:00
Alkis Evlogimenos d8bace7f60 Add DenseMap template and actually use it for for mapping virtual regs 
to objects.

llvm-svn: 11840
 2004-02-25 21:55:45 +00:00
Alkis Evlogimenos 1dd872ce94 Move machine code rewriter and spiller outside the register 
allocator.

The implementation is completely rewritten and now employs several
optimizations not exercised before. For example for 164.gzip we have
997 loads and 699 stores vs the 1221 loads and 880 stores we have
before.

llvm-svn: 11798
 2004-02-24 08:58:30 +00:00
Alkis Evlogimenos c794a9060f Refactor VirtRegMap out of RegAllocLinearScan as the first part of bug 
251 (providing a generic machine code rewriter/spiller).

llvm-svn: 11780
 2004-02-23 23:08:11 +00:00