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76 Commits

Author SHA1 Message Date
Chris Lattner
9f366d7ab6 Variety of small or trivial simplifications to the code, completely eliminated 
the dependence on PhysRegClassMap


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5064 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 22:19:19 +00:00
Chris Lattner
f605055994 Remove unused savePhysRegToStack method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5061 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 21:33:51 +00:00
Chris Lattner
01b08c59b4 Localize a map, remove another 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5060 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 21:24:30 +00:00
Chris Lattner
8233e2fe01 Give simple reg allocator a nice Pass Name 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5058 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 21:13:12 +00:00
Chris Lattner
15f96db4d9 Add a big assert making sure 2 address instructions are formed right 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5057 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 21:02:20 +00:00
Chris Lattner
3f91ad7ba7 Fix a problem that occurs when PHI nodes have multiple entries for the same predecessor 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5055 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 20:48:03 +00:00
Chris Lattner
da7e453aac Grab bag of minor cleanups. Export some statistics about the number of 
spills and reloads emitted


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5054 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 20:36:09 +00:00
Chris Lattner
198ab640bb Simplify interfaces used by regalloc to insert code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5052 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 20:06:35 +00:00
Chris Lattner
c2db1a95df * Simplify code a bit by breaking the PHI node handling stuff out into a seperate 
function from normal regalloc code
* Make the regalloc for a block a function instead of part of runOnMachineBB, which
  makes it easier to see what's going on in runOnMBB.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5051 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 19:51:14 +00:00
Chris Lattner
9593fb1503 * Remove some unneccesary instance variables 
* Make allocateStackSpaceFor only allocate the right amount of space


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5048 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 19:07:34 +00:00
Chris Lattner
dd444f9242 pull inverse reg class mapping into a class that is sharable and out of the 
target register description classes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5045 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 18:38:59 +00:00
Chris Lattner
abe8dd592d Prune #includes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5044 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 18:19:24 +00:00
Chris Lattner
ad44bd99ff Remove extraneous #includes, perform FIXME 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5043 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 18:15:24 +00:00
Chris Lattner
71c83728b4 Fix borkness with not using MachineBasicBlocks in PHI nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5035 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-15 08:02:51 +00:00
Misha Brukman
0868667f78 Fixed a bug where moves due to phis were being neglected. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5019 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-13 12:33:31 +00:00
Misha Brukman
74676da6f1 Need to insert all moves due to PHI nodes before *ALL* jumps in a predecessor 
basic block, as there could be multiple.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5016 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-13 11:55:59 +00:00
Misha Brukman
972b03fa53 This should be more correct: invalidates physical registers that are used in 
an instruction to avoid using them to allocate to other virtual registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5013 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-13 11:33:22 +00:00
Misha Brukman
59b3eedf31 Fixed bug with running out of registers. Also, reinstated namespace which 
disappeared during the last checkin.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5007 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-13 10:42:31 +00:00
Misha Brukman
203b769b20 This should handle register allocating PHI nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5002 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-13 09:54:36 +00:00
Misha Brukman
cea2245f04 Start allocating stack space at [ebp-4] to not overwrite the return address. 
Also make all loads & stores 4-byte aligned for performance. ;)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4982 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-13 04:34:02 +00:00
Misha Brukman
d1bedcced2 Take advantage of our knowledge of 2-address X86 instructions and 
register-allocated them appropriately.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4976 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-12 23:20:31 +00:00
Misha Brukman
dd46e2a81d Added code generation for function prologues and epilogues. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4930 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-04 23:58:08 +00:00
Misha Brukman
06f8aecc88 Fun arithmetic with iterators aimed at fixing a bug: inserting instructions 
after the *current* instruction while keeping the iterator in the same
'logical' place.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4923 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-04 19:24:45 +00:00
Misha Brukman
dc2ec004f1 This should fix the bug seen with some registers not being allocated 
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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4898 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-03 23:15:19 +00:00
Misha Brukman
f514d51b20 * Abstracted out stack space allocation into its own function 
* Added saving of register values to the stack


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4858 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-12-02 21:11:58 +00:00
Misha Brukman
0721867c8d A simple (spilling) register allocator. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4828 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-11-22 22:44:32 +00:00