289ba4f335
Avoid commuting a def MI in order to coalesce a copy instruction away if any use of the same val# is a copy instruction that has already been coalesced.
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llvm-svn: 48833
2008-03-26 19:03:01 +00:00
358e04a185
Use a linked data structure for the uses lists of an SDNode, just like
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LLVM Value/Use does and MachineRegisterInfo/MachineOperand does.
This allows constant time for all uses list maintenance operations.
The idea was suggested by Chris. Reviewed by Evan and Dan.
Patch is tested and approved by Dan.
On normal use-cases compilation speed is not affected. On very big basic
blocks there are compilation speedups in the range of 15-20% or even better.
llvm-svn: 48822
2008-03-26 12:39:26 +00:00
733a4d6e85
Fixed some spelling errors. Thanks, Duncan!
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llvm-svn: 48819
2008-03-26 11:23:38 +00:00
7e71b4baaf
Some improvements related to the computation of isReachable.
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This fixes Bugzilla #1835 (http://llvm.org/bugs/show_bug.cgi?id=1835 ).
This patched is reviewed by Tanya and Dan. Dan tested and approved it.
The reason for the bad performance of the old algorithm is that it is very naive and scans every
time all nodes of the DAG in the worst case.
This patch introduces a new algorithm based on the paper "Online algorithms
for maintaining the topological order of a directed acyclic graph" by
David J.Pearce and Paul H.J.Kelly. This is the MNR algorithm. It has a
linear time worst-case and performs much better in most situations.
The paper can be found here:
http://fano.ics.uci.edu/cites/Document/Online-algorithms-for-maintaining-the-topological-order-of-a-directed-acyclic-graph.html
The main idea of the new algorithm is to compute the topological ordering of the SNodes in the
DAG and to maintain it even after DAG modifications. The topological ordering allows for very fast
node reachability checks.
Tests on very big input files with tens of thousands of instructions in a BB indicate huge
speed-ups (up to 10x compilation time improvement) compared to the old version.
llvm-svn: 48817
2008-03-26 09:18:09 +00:00
292063603e
Fix some SSE4.1 instruction encoding bugs.
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llvm-svn: 48815
2008-03-26 08:11:49 +00:00
5d2d1776e0
Dead PHI instructions need to be handled specially.
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llvm-svn: 48811
2008-03-26 03:03:23 +00:00
ad6c23d5e9
Use ## for comment delimiter on darwin x86-32, so
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llvm's output .s files will go through gcc -std=c99
without triggering preprocesser errors. Approach
suggested by Daveed Vandevoorde.
llvm-svn: 48808
2008-03-25 23:29:30 +00:00
ddc58ff92a
Smaller function alignment when optimizing for size.
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llvm-svn: 48805
2008-03-25 22:29:46 +00:00
88c44ef91f
Rename option -optimizefor-size to -optimize-size.
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llvm-svn: 48804
2008-03-25 22:28:39 +00:00
9f129318dc
Remove some debugging code.
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llvm-svn: 48803
2008-03-25 22:26:43 +00:00
1d46d45e35
StrongPHIElimination doesn't support swapping live intervals like the coalescer does.
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llvm-svn: 48802
2008-03-25 22:25:27 +00:00
c60c67fc37
Add explicit keywords.
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llvm-svn: 48801
2008-03-25 22:06:05 +00:00
bdc24adaaf
A quick nm audit turned up several fixed tables and objects that were
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marked read-write. Use const so that they can be allocated in a
read-only segment.
llvm-svn: 48800
2008-03-25 21:45:14 +00:00
a7ba51f6ec
Avoid outputing spaces at the ends of lines.
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llvm-svn: 48797
2008-03-25 21:38:12 +00:00
72cfe84f05
Do not align loops if optimizing for size.
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llvm-svn: 48794
2008-03-25 21:03:02 +00:00
246a52740b
Add optimize-for-size knob.
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llvm-svn: 48793
2008-03-25 21:02:35 +00:00
df1690dc7c
Handle a special case xor undef, undef -> 0. Technically this should be transformed to undef. But this is such a common idiom (misuse) we are going to handle it.
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llvm-svn: 48792
2008-03-25 20:08:07 +00:00
2b72c05992
Handle a special case xor undef, undef -> 0. Technically this should be transformed to undef. But this is such a common idiom (misuse) we are going to handle it.
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llvm-svn: 48791
2008-03-25 20:07:13 +00:00
fd227e9c3a
Fix typos.
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llvm-svn: 48779
2008-03-25 17:10:29 +00:00
883cbfd0ba
Add CMP32mr and friends to the load-unfolding table. Among
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other things, this allows the scheduler to unfold a load operand
in the 2008-01-08-SchedulerCrash.ll testcase, so it now successfully
clones the comparison to avoid a pushf+popf.
llvm-svn: 48777
2008-03-25 16:53:19 +00:00
0ee1bd9588
Fix PR2062: Don't build Intrinsics.gen in the source directory. Do it in the
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object directory.
llvm-svn: 48766
2008-03-25 09:12:48 +00:00
7d564c3b4a
lastRegisterUse() should ignore identity copies. Those will be erased.
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llvm-svn: 48759
2008-03-25 02:02:19 +00:00
fe7610f37f
Remove an unneeded test.
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llvm-svn: 48755
2008-03-24 23:55:16 +00:00
50b536eef9
Add \t after .set. Fix by Jay Freeman.
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llvm-svn: 48753
2008-03-24 23:36:49 +00:00
69a3f9c417
If the coalescer commuted a def MI to allow coalescing, it can changed a previously coalesced copy into an non-identity copy.
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llvm-svn: 48752
2008-03-24 23:31:21 +00:00
6e225173c5
Add an assertion to catch register of illegal class.
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llvm-svn: 48751
2008-03-24 23:28:21 +00:00
6306183df3
Use the bit size of the operand instead of the hard-coded 32 to generate the
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mask.
llvm-svn: 48750
2008-03-24 23:16:37 +00:00
615488ab45
- SSE4.1 extractfps extracts a f32 into a gr32 register. Very useful! Not. Fix the instruction specification and teaches lowering code to use it only when the only use is a store instruction.
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llvm-svn: 48746
2008-03-24 21:52:23 +00:00
c905fe9407
Revert r48676. I had plans for using it, but now it's just dead code.
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llvm-svn: 48743
2008-03-24 21:29:58 +00:00
e2707768a4
Remove #include<iostream>, which I was using for debugging.
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llvm-svn: 48739
2008-03-24 20:36:47 +00:00
a38f58aa5c
Add incoming value from header only if phi node has any use inside the loop.
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llvm-svn: 48738
2008-03-24 20:16:14 +00:00
aa583d75b1
Shrink the size of AllocationInst by using its SubclassData
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field to store the alignment value instead of haing a
separate field.
llvm-svn: 48727
2008-03-24 16:55:58 +00:00
d8ea040c31
APIntify SelectionDAG's EXTRACT_ELEMENT code.
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llvm-svn: 48726
2008-03-24 16:38:05 +00:00
3471ae8c5d
Increasing the inline limit from (overly conservative) 200 to 300. Given each BB costs 20 and each instruction costs 5, 200 means a 4 BB function + 24 instructions (actually less because caller's size also contributes to it).
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Furthermore, double the limit when more than 10% of the callee instructions are vector instructions. Multimedia kernels tend to love inlining.
llvm-svn: 48725
2008-03-24 06:37:48 +00:00
21a8e3d260
Temporarily disabling memset forming optimization. Add an option.
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llvm-svn: 48720
2008-03-24 05:28:38 +00:00
200e57840e
Be sure to remove intervals after we've joined them. Also, remove some duplicated code.
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With this pass, StrongPHIElim can compile very simple testcases correctly. There's still a ways
to go before it's ready for prime time, though.
llvm-svn: 48719
2008-03-24 04:11:27 +00:00
c3cf9f872a
Transform (zext (or (icmp), (icmp))) to (or (zext (cimp), (zext icmp))) if at least one of the (zext icmp) can be transformed to eliminate an icmp.
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llvm-svn: 48715
2008-03-24 00:21:34 +00:00
58db865d6e
Remove duplicated entries.
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llvm-svn: 48714
2008-03-23 22:56:07 +00:00
07a45f4edb
Objective Caml bindings for basic block, function, global, and arg iterators.
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llvm-svn: 48711
2008-03-23 22:21:29 +00:00
1fdd5e9133
Minor typo fixes. Also add another FIXME.
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llvm-svn: 48710
2008-03-23 20:32:06 +00:00
d38b3fb127
Preserve calling convention during function cloning
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llvm-svn: 48708
2008-03-23 16:03:00 +00:00
17fb491469
Add license header
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llvm-svn: 48707
2008-03-23 14:53:18 +00:00
9f0e820fa3
Add Win64 compilation callback. This allows easy examples to be JITed on Win64!
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llvm-svn: 48706
2008-03-23 14:44:32 +00:00
a347663762
Provide a JIT selector on win64
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llvm-svn: 48704
2008-03-23 13:43:47 +00:00
7574ead985
Hack out the PIC mode on Win64 targets. This needs to be investigated later.
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llvm-svn: 48703
2008-03-23 13:41:18 +00:00
4733e72a25
Code cleanup. Provide generic way of selecting JIT pointer bitwidth regardless
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of compiler used.
llvm-svn: 48702
2008-03-23 13:40:45 +00:00
bd47269f13
Remove old-standing obsolete code.
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llvm-svn: 48701
2008-03-23 12:32:54 +00:00
cec773d8e7
Honour built-in defines on win64 targets for automatically subtarget recognize.
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Force stack alignment to 16 bytes on win targets.
llvm-svn: 48695
2008-03-22 21:18:22 +00:00
07a789d2b5
Recognize "windows" in target triple, not only "win32"
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llvm-svn: 48694
2008-03-22 21:12:53 +00:00
b86e0936f1
Add information about callee-saved registers on Win64
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llvm-svn: 48692
2008-03-22 21:04:01 +00:00
Evan Cheng