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Author SHA1 Message Date
Evan Cheng
a62f5f0f82 If it's determined safe, remat MOV32r0 (i.e. xor r, r) and others as it is instead of using the longer MOV32ri instruction. 
llvm-svn: 52670
 2008-06-24 07:10:51 +00:00
Dan Gohman
29c5903a80 Fix some signed vs. unsigned issues in array and vector handling. 
llvm-svn: 52664
 2008-06-24 01:17:52 +00:00
Dan Gohman
9941a2dab3 Add a note about a potential PIC optimization. 
llvm-svn: 52663
 2008-06-24 00:53:07 +00:00
Dan Gohman
ebc59c90b7 Fixes for being compiled PIC on Linux. This isn't the most 
general solution possible, but it's a fairly simple one.
Based on a patch from the OpenGTL project!

llvm-svn: 52662
 2008-06-24 00:50:01 +00:00
Owen Anderson
501d3ab521 Remove an incorrect comment. 
llvm-svn: 52660
 2008-06-24 00:15:10 +00:00
Owen Anderson
dffc50e90f Use InstrSlots::NUM rather than pre-dividing by four. Also, mark this const. 
llvm-svn: 52659
 2008-06-24 00:08:35 +00:00
Dan Gohman
13e2ffe637 Comment fixes, and make Schedule() pure virtual. 
llvm-svn: 52658
 2008-06-24 00:02:44 +00:00
Dan Gohman
0e992740a0 A brief survey of priority_queue usage in the tree turned this up 
as a questionable case, but the code isn't actually needed.

llvm-svn: 52657
 2008-06-23 23:51:16 +00:00
Dan Gohman
490250e7f2 Add a clear() method to PriorityQueue. 
llvm-svn: 52656
 2008-06-23 23:47:46 +00:00
Bill Wendling
2501066409 This situation can occur: 
,------.
    |      |
    |      v
    |   t2 = phi ... t1 ...
    |      |
    |      v
    |   t1 = ...
    |  ... = ... t1 ...
    |      |
    `------'

where there is a use in a PHI node that's a predecessor to the defining
block. We don't want to mark all predecessors as having the value "alive" in
this case. Also, the assert was too restrictive and didn't handle this case.

llvm-svn: 52655
 2008-06-23 23:41:14 +00:00
Dan Gohman
95743e3078 Use the new PriorityQueue in ScheduleDAGList too, which also 
needs arbitrary-element removal.

llvm-svn: 52654
 2008-06-23 23:40:09 +00:00
Owen Anderson
df17544cd3 Add getScaledIntervalSize, which gives a measure of the size of an interval that is independent of the scaling of 
the function due to empty index slots.  This is suitable for use in backend heuristics that need to reason about the density
of an interval.

llvm-svn: 52652
 2008-06-23 23:25:37 +00:00
Dan Gohman
11d367fd0c Use use_empty() instead of getNumUses(), avoiding a use list traversal. 
llvm-svn: 52651
 2008-06-23 23:23:49 +00:00
Owen Anderson
f2386cff4f Use getMBBEndIdx rather than assuming that the end is right after the last instruction in the block. 
llvm-svn: 52649
 2008-06-23 22:12:23 +00:00
Dan Gohman
24ec9f54bc Fix spelling and grammar in a comment. 
llvm-svn: 52648
 2008-06-23 22:11:52 +00:00
Bill Wendling
d71e7e4f8e Extract the x86_64 part for the executables. 
llvm-svn: 52647
 2008-06-23 22:08:30 +00:00
Dan Gohman
512bf41c02 Simplify erase_one slightly. It's not necessary to preserve 
the value of the element to be erased while the heap is
being updated.

llvm-svn: 52646
 2008-06-23 21:46:21 +00:00
Dan Gohman
7f6ee1cd4b Revamp the loop unroller, extending it to correctly update PHI nodes 
in the presence of out-of-loop users of in-loop values and the trip
count is not a known multiple of the unroll count, and to be a bit
simpler overall. This fixes PR2253.

llvm-svn: 52645
 2008-06-23 21:29:41 +00:00
Evan Cheng
73bdede529 Remove option used to debug stack coloring bugs. It's no longer needed since stack coloring is now bug free. 
llvm-svn: 52644
 2008-06-23 21:24:32 +00:00
Evan Cheng
174f11c202 Disable PRE. It's breaking bootstrapping. 
llvm-svn: 52643
 2008-06-23 21:22:35 +00:00
Dan Gohman
71a0e81d0b Move a DenseMap's declaration outside of a loop, and just call 
clear() on each iteration. This avoids allocating and deallocating
all of DenseMap's memory on each iteration.

llvm-svn: 52642
 2008-06-23 21:15:00 +00:00
Dan Gohman
a989f4f916 Use StringMap instead of std::map<std::string, SDNode*>. 
llvm-svn: 52641
 2008-06-23 21:08:32 +00:00
Dan Gohman
54b67be86a Add methods to StringMap to erase entries by key. 
llvm-svn: 52640
 2008-06-23 21:07:03 +00:00
Evan Cheng
6e5a126667 Instead of adding an isSS field to LiveInterval to denote stack slot. Use top bit of 'reg' instead. If the top bit is set, than the LiveInterval represents a stack slot live interval. 
llvm-svn: 52639
 2008-06-23 21:03:19 +00:00
Wojciech Matyjewicz
1de28ac425 First step to fix PR2088. Implement routine to compute the 
multiplicative inverse of a given number. Modify udivrem to allow input and 
output pairs of arguments to overlap. Patch is based on the work by Chandler
Carruth.

llvm-svn: 52638
 2008-06-23 19:39:50 +00:00
Dan Gohman
5a929b928e Update the .cvs files. 
llvm-svn: 52637
 2008-06-23 18:43:26 +00:00
Dan Gohman
7492d685c7 Fix the types for NumElements variables, and add a comment 
explaining why empty array constants use ValID::createUndef().

llvm-svn: 52636
 2008-06-23 18:40:28 +00:00
Owen Anderson
0dcae02ad4 Tighten the conditions under which we do PRE, remove some unneeded code, and correct our preserved analyses list, since we 
do now change the CFG by splitting critical edges during PRE.

llvm-svn: 52631
 2008-06-23 17:49:45 +00:00
Chris Lattner
b992911447 minor tidying of comments. 
llvm-svn: 52630
 2008-06-23 17:11:23 +00:00
Dan Gohman
b52f318a0c Remove two convenience constructors because they're now private, and the 
private implementation doesn't really need the convenience.

llvm-svn: 52629
 2008-06-23 16:48:17 +00:00
Dan Gohman
12a793b025 Use std::copy instead of a loop. 
llvm-svn: 52628
 2008-06-23 16:45:24 +00:00
Dan Gohman
d9e2c8b72a More changes from Chris' review: simplify getIndices and avoid 
copying its return value.

llvm-svn: 52627
 2008-06-23 16:39:44 +00:00
Dan Gohman
696e841b14 Remove an unnecessary cast. 
llvm-svn: 52626
 2008-06-23 16:38:10 +00:00
Dan Gohman
84cef04f76 Duncan pointed out this code could be tidied. 
llvm-svn: 52624
 2008-06-23 15:29:14 +00:00
Dan Gohman
35787913ea Fix the syntax of insertvalue in the example. 
llvm-svn: 52623
 2008-06-23 15:26:37 +00:00
Duncan Sands
e7f2c80a8c Port some integer multiplication fixes from LegalizeDAG. 
Bail out with an error if there is no libcall available
for the given size of integer.

llvm-svn: 52622
 2008-06-23 15:15:44 +00:00
Duncan Sands
86e6f1a3b6 Support for expanding the result of EXTRACT_ELEMENT. 
llvm-svn: 52621
 2008-06-23 15:08:15 +00:00
Duncan Sands
1b83cbdebe Cleanup up LegalizeTypes handling of loads and 
stores.

llvm-svn: 52620
 2008-06-23 14:19:45 +00:00
Bill Wendling
d6b7d457cf Make test work on non-x86 machines (like my G4 PPC). 
llvm-svn: 52619
 2008-06-23 06:16:31 +00:00
Owen Anderson
7d4e8f976c At Chris' suggestion, move the liveness and worklist datastructures into 
instance variables so they can be allocated just once, and reuse the worklist
as the dead list as well.

llvm-svn: 52618
 2008-06-23 06:13:12 +00:00
Dan Gohman
62d8bc0480 Improve LSR's dead-phi detection to handle use-def cycles 
with more than two nodes.

llvm-svn: 52617
 2008-06-22 20:44:02 +00:00
Dan Gohman
4ada89e819 Use Loop::block_iterator. 
llvm-svn: 52616
 2008-06-22 20:18:58 +00:00
Dan Gohman
90894ac18b Generalize createSCEV to be able to form SCEV expressions from 
ConstantExprs.

llvm-svn: 52615
 2008-06-22 19:56:46 +00:00
Dan Gohman
81c83d9a1d Use SCEVAddRecExpr::isAffine. 
llvm-svn: 52614
 2008-06-22 19:23:09 +00:00
Dan Gohman
c1aa753f00 Remove unnecessary #includes. 
llvm-svn: 52613
 2008-06-22 19:21:26 +00:00
Dan Gohman
311865bd24 Move a few more SCEVExpander methods out-of-line. 
llvm-svn: 52612
 2008-06-22 19:09:18 +00:00
Chris Lattner
d80c865a09 Fix PR2369 by making scalarrepl more careful about promoting 
structures.  Its default threshold is to promote things that are
smaller than 128 bytes, which is sane.  However, it is not sane
to do this for things that turn into 128 *registers*.  Add a cap
on the number of registers introduced, defaulting to 128/4=32.

llvm-svn: 52611
 2008-06-22 17:46:21 +00:00
Duncan Sands
d1d3e67d30 Make custom lowering of ADD work correctly. This 
fixes PR2476; patch by Richard Osborne.  The same
problem exists for a bunch of other operators, but
I'm ignoring this because they will be automagically
fixed when the new LegalizeTypes infrastructure lands,
since it already solves this problem centrally.

llvm-svn: 52610
 2008-06-22 09:42:16 +00:00
Eli Friedman
369401ef95 Fix for PR2479: correctly optimize expressions like (a > 13) & (a == 
15).

See also PR1800, which is about the signed case.

llvm-svn: 52608
 2008-06-21 23:36:13 +00:00
Dan Gohman
91a43b082c Use Instruction::eraseFromParent(). 
llvm-svn: 52606
 2008-06-21 22:08:46 +00:00