Misha Brukman
1f57df5fad
Need to insert all moves due to PHI nodes before *ALL* jumps in a predecessor
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basic block, as there could be multiple.
llvm-svn: 5016
2002-12-13 11:55:59 +00:00
Misha Brukman
0bfbbc73f2
This should be more correct: invalidates physical registers that are used in
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an instruction to avoid using them to allocate to other virtual registers.
llvm-svn: 5013
2002-12-13 11:33:22 +00:00
Misha Brukman
e694e406a4
Fixed bug with running out of registers. Also, reinstated namespace which
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disappeared during the last checkin.
llvm-svn: 5007
2002-12-13 10:42:31 +00:00
Misha Brukman
af40b6adcd
This should handle register allocating PHI nodes.
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llvm-svn: 5002
2002-12-13 09:54:36 +00:00
Misha Brukman
e5a8dcc695
Start allocating stack space at [ebp-4] to not overwrite the return address.
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Also make all loads & stores 4-byte aligned for performance. ;)
llvm-svn: 4982
2002-12-13 04:34:02 +00:00
Misha Brukman
12bec4ecef
Take advantage of our knowledge of 2-address X86 instructions and
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register-allocated them appropriately.
llvm-svn: 4976
2002-12-12 23:20:31 +00:00
Misha Brukman
8f56246d62
Added code generation for function prologues and epilogues.
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llvm-svn: 4930
2002-12-04 23:58:08 +00:00
Misha Brukman
566bac5ec1
Fun arithmetic with iterators aimed at fixing a bug: inserting instructions
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after the *current* instruction while keeping the iterator in the same
'logical' place.
llvm-svn: 4923
2002-12-04 19:24:45 +00:00
Misha Brukman
f13126a427
This should fix the bug seen with some registers not being allocated
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correctly: skipping instructions by incorrectly incrementing the pointer.
Also adds support for building a reg-to-regclass map, and splits the function
for saving register to stack into two, one suitable for virtual registers
(which also assigns it a physical register) and one for simply storing back
physical registers.
llvm-svn: 4898
2002-12-03 23:15:19 +00:00
Misha Brukman
f776547336
* Abstracted out stack space allocation into its own function
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* Added saving of register values to the stack
llvm-svn: 4858
2002-12-02 21:11:58 +00:00
Misha Brukman
021bf57248
A simple (spilling) register allocator.
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llvm-svn: 4828
2002-11-22 22:44:32 +00:00
