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3543 Commits

Author SHA1 Message Date
Alkis Evlogimenos
9f62b96206 Remove declared but undefined method. 
llvm-svn: 10710
 2004-01-07 02:29:33 +00:00
Alkis Evlogimenos
1e01557c4e Change implementation of LiveIntervals::overlap(). This results in a 
30-50% decrease in running time of the linear scan register allocator.

llvm-svn: 10707
 2004-01-07 01:45:58 +00:00
Alkis Evlogimenos
2fa1aef707 Remove simple coalescing. 
llvm-svn: 10695
 2004-01-05 08:24:57 +00:00
Chris Lattner
fc3d0598df fix warning 
llvm-svn: 10692
 2004-01-05 05:42:17 +00:00
Alkis Evlogimenos
08c5311729 Currently we cannot handle two-address instructions of the form: 
A = B op C where A == C, but this cannot really occur in practice
because of SSA form. Add an assert to check that just to be safe.

llvm-svn: 10682
 2004-01-05 02:25:45 +00:00
Alkis Evlogimenos
5e0e67173d Update description. 
llvm-svn: 10681
 2004-01-04 23:09:24 +00:00
Chris Lattner
5d236005b0 Clean up a lot of the code I added yesterday by exposing the IntrinsicLowering 
implementation from the TargetMachine directly.

llvm-svn: 10636
 2003-12-28 21:23:38 +00:00
Alkis Evlogimenos
a158dc8104 Reserve ECX and EDI instead of EBX and EDI. Since EBX is a callee 
saved register it has a longer free range than ECX (which is defined
every time there is a fnuction call) which makes ECX a better register
to reserve.

llvm-svn: 10635
 2003-12-28 18:03:52 +00:00
Alkis Evlogimenos
43b587d94d Add coalescing to register allocator. A hint is added to each interval 
which denotes the register we would like to be assigned to (virtual or
physical). In register allocation, if this hint exists and we can map
it to a physical register (it is either a physical register or it is a
virtual register that already got assigned to a physical one) we use
that register if it is available instead of a random one in the free
pool.

llvm-svn: 10634
 2003-12-28 17:58:18 +00:00
Chris Lattner
10cac58d23 Whoops, don't try to lower non intrinsic calls 
llvm-svn: 10632
 2003-12-28 09:53:23 +00:00
Chris Lattner
4b75e04a60 Use the intrinsic lowering functionality 
llvm-svn: 10626
 2003-12-28 09:43:35 +00:00
Chris Lattner
24650d2b5e Move into the VMCore library 
llvm-svn: 10623
 2003-12-28 08:30:20 +00:00
Chris Lattner
08c196dd4b Implement the default implementation of the intrinsic lowering class 
llvm-svn: 10621
 2003-12-28 08:19:41 +00:00
Chris Lattner
27dd64242b finegrainify namespacification 
minor cleanups

llvm-svn: 10619
 2003-12-28 07:59:53 +00:00
Alkis Evlogimenos
2e8c984c58 Improve debugging output when choosing a register to spill. 
llvm-svn: 10604
 2003-12-24 18:53:31 +00:00
Alkis Evlogimenos
eeea81483f Do a separate pass to compute spill weights because doing it inline 
with live intervals was missing registers that were used before they
were defined (in the arbitrary order live intervals numbers
instructions).

llvm-svn: 10603
 2003-12-24 15:44:53 +00:00
Alkis Evlogimenos
7d7d7e89d4 Change the way free regusters are computed and perform better 
allocation in the presence of preallocated intervals.

llvm-svn: 10595
 2003-12-23 18:00:33 +00:00
Alkis Evlogimenos
3ec903474f Fix crash when compiling twolf. 
llvm-svn: 10584
 2003-12-22 13:54:29 +00:00
Alkis Evlogimenos
690e1b8de2 Remove verifyIntervals() since it doesn't actually work right now. 
llvm-svn: 10570
 2003-12-21 20:41:26 +00:00
Alkis Evlogimenos
2665d9c6f9 Change weight into a float so that we can take into account the 
nesting level when computing it. Right now the allocator uses:

    w = sum_over_defs_uses( 10 ^ nesting level );

llvm-svn: 10569
 2003-12-21 20:19:10 +00:00
Alkis Evlogimenos
c09b77ea35 Add support for inactive intervals. This effectively reuses registers 
for live ranges that fall into assigned registers' holes.

llvm-svn: 10566
 2003-12-21 05:43:40 +00:00
Chris Lattner
4cbb97bfdd Add a new target-independent machine code freeing pass 
llvm-svn: 10560
 2003-12-20 10:20:58 +00:00
Chris Lattner
9a3478e022 * Finegrainify namespacification 
* Move sparc specific code out of generic code
* Eliminate the getOffset() method which made INVALID_FRAME_OFFSET
  necessary, which made pulling in MAX_INT as a sentinal necessary.

llvm-svn: 10553
 2003-12-20 09:17:07 +00:00
Alkis Evlogimenos
7139090fd2 Remove TwoAddressInstruction from the public headers and add an ID 
instead, since this pass doesn't expose any state to its users.

llvm-svn: 10520
 2003-12-18 22:40:24 +00:00
Chris Lattner
8f88cdfa22 Prune some #includes 
Add a statistic for # reloads

llvm-svn: 10518
 2003-12-18 20:25:31 +00:00
Alkis Evlogimenos
e5e2bd6777 Modify linear scan register allocator to use the two-address 
instruction pass. This also fixes all remaining bugs for this new
allocator to pass all tests under test/Programs.

llvm-svn: 10515
 2003-12-18 13:15:02 +00:00
Alkis Evlogimenos
3bd69eaac5 Fix bug in reserved registers. DH actually aliases DX and EDX which 
are not reserved registers.

llvm-svn: 10514
 2003-12-18 13:12:18 +00:00
Alkis Evlogimenos
c17d57bd82 Modify local register allocator to use the two-address instruction pass. 
llvm-svn: 10513
 2003-12-18 13:08:52 +00:00
Alkis Evlogimenos
725021cb6c Add TwoAddressInstructionPass to handle instructions that have two or 
more operands and the two first operands are constrained to be the
same. The pass takes an instruction of the form:

        a = b op c

and transforms it into:

        a = b
        a = a op c

and also preserves live variables.

llvm-svn: 10512
 2003-12-18 13:06:04 +00:00
Alkis Evlogimenos
4d87219486 Rename LiveIntervals::expired() to LiveIntervals::expiredAt(). 
llvm-svn: 10511
 2003-12-18 08:56:11 +00:00
Alkis Evlogimenos
15b8036b29 When a variable is killed and redifined in a basic block only one 
killing instruction is tracked. This causes the LiveIntervals to
create bogus intervals. The workaound is to add a range to the
interval from the redefinition to the end of the basic block.

llvm-svn: 10510
 2003-12-18 08:53:43 +00:00
Alkis Evlogimenos
40874c708f Handle multiple virtual register definitions gracefully. 
Move some of the longer LiveIntervals::Interval method out of the
header and add debug information to them. Fix bug and simplify range
merging code.

llvm-svn: 10509
 2003-12-18 08:48:48 +00:00
Alkis Evlogimenos
8870674da7 Change preserve all claim to just preserve live variables and phielimination. 
llvm-svn: 10469
 2003-12-15 04:55:38 +00:00
Alkis Evlogimenos
aaba4639f8 Change interface of MachineOperand as follows: 
a) remove opIsUse(), opIsDefOnly(), opIsDefAndUse()
    b) add isUse(), isDef()
    c) rename opHiBits32() to isHiBits32(),
              opLoBits32() to isLoBits32(),
              opHiBits64() to isHiBits64(),
              opLoBits64() to isLoBits64().

This results to much more readable code, for example compare
"op.opIsDef() || op.opIsDefAndUse()" to "op.isDef()" a pattern used
very often in the code.

llvm-svn: 10461
 2003-12-14 13:24:17 +00:00
Alkis Evlogimenos
4f7f017ab5 When reserving a preallocated register spill the aliases of this 
register too.

llvm-svn: 10450
 2003-12-13 11:58:10 +00:00
Alkis Evlogimenos
7dbdf3839c Ignore non-allocatable physical registers in live interval analysis. 
llvm-svn: 10449
 2003-12-13 11:11:02 +00:00
Alkis Evlogimenos
ed53b35076 Expire any active intervals left when register allocation is done. 
llvm-svn: 10448
 2003-12-13 05:50:19 +00:00
Alkis Evlogimenos
e6dc614c3c Add instruction numbers to debugging output. 
llvm-svn: 10447
 2003-12-13 05:48:57 +00:00
Alkis Evlogimenos
06f379a278 Handle explicit physical register defs. 
llvm-svn: 10445
 2003-12-13 05:26:39 +00:00
Alkis Evlogimenos
9bced9455a Remove unecessary if statements when looping on ImplicitDefs. 
llvm-svn: 10444
 2003-12-13 01:20:58 +00:00
John Criswell
fb55ac24ec This appears to fix Bug 172 and does not break any other feature tests or 
regression tests.

llvm-svn: 10388
 2003-12-10 22:51:41 +00:00
Alkis Evlogimenos
e59ad4b441 Make assertion stricter. Since the source operands are allocated at 
this point, the second operand must be a physical register (it cannot
be a virtual one).

llvm-svn: 10292
 2003-12-05 11:31:39 +00:00
Alkis Evlogimenos
f8fe176204 Fix bug in register spilling when a preallocated live range overlaps a 
potential register assignment.

llvm-svn: 10291
 2003-12-05 11:17:55 +00:00
Alkis Evlogimenos
2de099e54f Move operator<<(std::ostream&, const LiveInterval&) out of the header file. 
llvm-svn: 10290
 2003-12-05 10:38:28 +00:00
Alkis Evlogimenos
ed28ca93ef Sort live intervals by increasing start point. 
llvm-svn: 10289
 2003-12-05 10:32:01 +00:00
Alkis Evlogimenos
5fe0031c68 Improve debugging output and clean up some code. 
llvm-svn: 10288
 2003-12-04 03:57:28 +00:00
Alkis Evlogimenos
26f17e73eb Print instructions before register allocation is performed. Also fix 
bug where spill instructions were added to the next basic block
instead of the end of the current one if the instruction that required
the spill was the last in the block.

llvm-svn: 10272
 2003-11-30 23:40:39 +00:00
Alkis Evlogimenos
0aa40f8db0 Remove "numReloaded" statistic. 
llvm-svn: 10268
 2003-11-30 05:15:36 +00:00
Alkis Evlogimenos
0e9ded74c0 Merging the linear scan register allocator in trunk. It currently passes most tests under test/Programs/SingleSource/Benchmarks/Shootout so development will continue on trunk. The allocator is not enabled by default. You will need to pass -regallo=linearscan to lli or llc to use it. 
llvm-svn: 10103
 2003-11-20 03:32:25 +00:00
Brian Gaeke
960707c335 Put all LLVM code into the llvm namespace, as per bug 109. 
llvm-svn: 9903
 2003-11-11 22:41:34 +00:00