Jim Grosbach
b9fd88619e
ARM: Add test cleanup entry to the README.
...
llvm-svn: 159864
2012-07-06 21:52:04 +00:00
Jakob Stoklund Olesen
0419ed395c
Implement ARMBaseInstrInfo::commuteInstruction() for MOVCCr.
...
A MOVCCr instruction can be commuted by inverting the condition. This
can help reduce register pressure and remove unnecessary copies in some
cases.
<rdar://problem/11182914>
llvm-svn: 154033
2012-04-04 18:23:42 +00:00
Bob Wilson
157561c941
Add a note about a potential optimization for clz/ctz patterns for ARM
...
(and other targets).
llvm-svn: 149182
2012-01-28 18:30:07 +00:00
Evan Cheng
ddc415a907
Add an entry.
...
llvm-svn: 135024
2011-07-13 01:33:00 +00:00
Bob Wilson
72ccdfe148
Add a readme entry for the redundant movw issue for pr9370.
...
llvm-svn: 126930
2011-03-03 06:39:09 +00:00
Eli Friedman
94c9f00dd6
And a bit more non-ASCII stuff.
...
llvm-svn: 109458
2010-07-26 22:28:18 +00:00
Anton Korobeynikov
b71ee4ebbb
Drop some non-ascii stuff
...
llvm-svn: 109456
2010-07-26 22:23:07 +00:00
Anton Korobeynikov
5e1e95aed9
Add a note
...
llvm-svn: 109448
2010-07-26 21:48:35 +00:00
Jim Grosbach
270540da7b
Add combiner patterns to more effectively utilize the BFI (bitfield insert)
...
instruction for non-constant operands. This includes the case referenced
in the README.txt regarding a bitfield copy.
llvm-svn: 108608
2010-07-17 03:30:54 +00:00
Eli Friedman
fc1680a9af
Random note about bswap.
...
llvm-svn: 108396
2010-07-15 02:20:38 +00:00
Eli Friedman
7175d7558d
A couple potential optimizations inspired by comment 4 in PR6773.
...
llvm-svn: 108328
2010-07-14 06:58:26 +00:00
Chris Lattner
6a8b488d78
add a note.
...
llvm-svn: 99815
2010-03-29 17:02:02 +00:00
Chris Lattner
f95f8a8c7c
add a note, from PR5100
...
llvm-svn: 96490
2010-02-17 18:42:24 +00:00
Chris Lattner
1492d5c447
this is done, tested by CodeGen/ARM/iabs.ll
...
llvm-svn: 95609
2010-02-08 23:48:10 +00:00
Jim Grosbach
231a0d01a9
Fix PR5694. The CMN instructions set the flags differently from CMP, so they
...
cannot be directly interchanged for comparisons against negated values.
Disable the CMN instructions for the time being.
llvm-svn: 94119
2010-01-22 00:08:13 +00:00
Jim Grosbach
ea6c9c17f5
Use Unified Assembly Syntax for the ARM backend.
...
llvm-svn: 86494
2009-11-09 00:11:35 +00:00
Evan Cheng
899d8cb6a0
Refactor code. Fix a potential missing check. Teach isIdentical() about tLDRpci_pic.
...
llvm-svn: 86330
2009-11-07 04:04:34 +00:00
Evan Cheng
e79ff8a615
These are done / no longer care.
...
llvm-svn: 85798
2009-11-02 07:58:25 +00:00
Evan Cheng
532dfd431f
Add an entry.
...
llvm-svn: 85797
2009-11-02 07:51:19 +00:00
Bob Wilson
1c2cbe3945
Add a note about Robert Muth's alternate jump table implementation.
...
llvm-svn: 85624
2009-10-30 22:22:46 +00:00
Evan Cheng
54a1a87862
Make ARM and Thumb2 32-bit immediate materialization into a single 32-bit pseudo
...
instruction. This makes it re-materializable.
Thumb2 will split it back out into two instructions so IT pass will generate the
right mask. Also, this expose opportunies to optimize the movw to a 16-bit move.
llvm-svn: 82982
2009-09-28 09:14:39 +00:00
Chris Lattner
edb8650e80
add a random codegen deficiency.
...
llvm-svn: 77598
2009-07-30 16:08:58 +00:00
Evan Cheng
597bf41097
Disable my constant island pass optimization (to make use soimm more effectively). It caused infinite looping on lencod.
...
llvm-svn: 76995
2009-07-24 19:31:03 +00:00
Evan Cheng
f0af946ac8
Add an entry.
...
llvm-svn: 76711
2009-07-22 00:58:27 +00:00
Evan Cheng
093adf3ff9
Implement Thumb2 ldr.
...
After much back and forth, I decided to deviate from ARM design and split LDR into 4 instructions (r + imm12, r + imm8, r + r << imm12, constantpool). The advantage of this is 1) it follows the latest ARM technical manual, and 2) makes it easier to reduce the width of the instruction later. The down side is this creates more inconsistency between the two sub-targets. We should split ARM LDR instruction in a similar fashion later. I've added a README entry for this.
llvm-svn: 74420
2009-06-29 07:51:04 +00:00
Evan Cheng
2eb1525e2a
Add a note about commuting conditional move.
...
llvm-svn: 74241
2009-06-26 00:28:48 +00:00
Evan Cheng
f23c8a5c8a
These are done / no longer applicable.
...
llvm-svn: 74239
2009-06-26 00:25:27 +00:00
Bob Wilson
6db76aaf10
Add support for ARM's Advanced SIMD (NEON) instruction set.
...
This is still a work in progress but most of the NEON instruction set
is supported.
llvm-svn: 73919
2009-06-22 23:27:02 +00:00
Chris Lattner
706eb604ae
several entries got significantly better, though they still aren't done.
...
llvm-svn: 44382
2007-11-27 22:41:52 +00:00
Chris Lattner
d2ee2dad04
implement a trivial readme entry.
...
llvm-svn: 44380
2007-11-27 22:36:16 +00:00
Chris Lattner
57e2fa4ba0
Add an easy microoptimization I noticed.
...
llvm-svn: 43164
2007-10-19 03:29:26 +00:00
Chris Lattner
d4602cc0e7
Add some notes about better flag handling.
...
llvm-svn: 41808
2007-09-10 21:43:18 +00:00
Evan Cheng
05c784cc30
Update.
...
llvm-svn: 38513
2007-07-10 21:49:47 +00:00
Dale Johannesen
d6f582af9d
Remove item: thumb padding in constant islands
...
llvm-svn: 36586
2007-04-30 00:32:06 +00:00
Chris Lattner
f7ac47b4e2
add a crazy idea
...
llvm-svn: 36273
2007-04-20 20:18:43 +00:00
Chris Lattner
af5c203dbd
add a note
...
llvm-svn: 36203
2007-04-17 18:03:00 +00:00
Evan Cheng
fb9c4c2edc
Updated.
...
llvm-svn: 35229
2007-03-20 22:32:39 +00:00
Evan Cheng
a4e410aa9c
Minor stuff.
...
llvm-svn: 35049
2007-03-09 19:46:06 +00:00
Evan Cheng
d7201d12af
Add comments about LSR / ARM.
...
llvm-svn: 35048
2007-03-09 19:35:33 +00:00
Evan Cheng
2e6f19d8c8
Unfinished work and ideas related to register scavenger.
...
llvm-svn: 35047
2007-03-09 19:34:51 +00:00
Dale Johannesen
10a05b538d
apply comments from review of last patch
...
llvm-svn: 35045
2007-03-09 19:18:59 +00:00
Dale Johannesen
23c2498e23
Add some observations from CoreGraphics benchmark. Remove register
...
scavenging todo item, since it is now implemented.
llvm-svn: 35044
2007-03-09 17:58:17 +00:00
Dale Johannesen
5ec68034ee
Add intelligence about where to break large blocks.
...
llvm-svn: 34755
2007-02-28 18:41:23 +00:00
Dale Johannesen
f6f34ec2e0
cosmetic changes from review of last patch. obvious
...
llvm-svn: 34598
2007-02-25 18:31:31 +00:00
Dale Johannesen
ccecc12da5
Removed WaterListOffset, inserted BBOffsets. Remove TODO item about this
...
from README.
When no water available, use end of block if in range. (More to do here.)
llvm-svn: 34563
2007-02-25 00:47:03 +00:00
Dale Johannesen
544968d665
rewrite of constant islands
...
llvm-svn: 34523
2007-02-23 05:02:36 +00:00
Chris Lattner
63479262b4
add a note
...
llvm-svn: 33778
2007-02-02 04:36:46 +00:00
Evan Cheng
c6e1d453d3
ARM backend contribution from Apple.
...
llvm-svn: 33353
2007-01-19 07:51:42 +00:00
Rafael Espindola
e3aafd29a9
add note
...
llvm-svn: 32452
2006-12-11 23:56:10 +00:00
Rafael Espindola
31f59f5b94
add FSTD and FSTS
...
llvm-svn: 30996
2006-10-17 13:36:07 +00:00