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57 Commits

Author SHA1 Message Date
Jim Grosbach
db6faeb19d ARM: Add test cleanup entry to the README. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159864 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-07-06 21:52:04 +00:00
Jakob Stoklund Olesen
c5041cac7d 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>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154033 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-04-04 18:23:42 +00:00
Bob Wilson
7750ff1e3c Add a note about a potential optimization for clz/ctz patterns for ARM 
(and other targets).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149182 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-01-28 18:30:07 +00:00
Evan Cheng
3b737081e4 Add an entry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135024 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-07-13 01:33:00 +00:00
Bob Wilson
acc9e7315c Add a readme entry for the redundant movw issue for pr9370. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126930 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-03-03 06:39:09 +00:00
Eli Friedman
a10213e934 And a bit more non-ASCII stuff. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109458 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-26 22:28:18 +00:00
Anton Korobeynikov
4e084e93a7 Drop some non-ascii stuff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109456 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-26 22:23:07 +00:00
Anton Korobeynikov
25a6ab0144 Add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109448 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-26 21:48:35 +00:00
Jim Grosbach
5423856e44 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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108608 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-17 03:30:54 +00:00
Eli Friedman
4baa8ebc93 Random note about bswap. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108396 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-15 02:20:38 +00:00
Eli Friedman
54cc0e12da A couple potential optimizations inspired by comment 4 in PR6773. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108328 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-14 06:58:26 +00:00
Chris Lattner
f283e40b6a add a note. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99815 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-29 17:02:02 +00:00
Chris Lattner
7180f10fc7 add a note, from PR5100 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96490 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-17 18:42:24 +00:00
Chris Lattner
c133457269 this is done, tested by CodeGen/ARM/iabs.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95609 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-08 23:48:10 +00:00
Jim Grosbach
d5d2baec26 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94119 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-01-22 00:08:13 +00:00
Jim Grosbach
e5165490b7 Use Unified Assembly Syntax for the ARM backend. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86494 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-09 00:11:35 +00:00
Evan Cheng
d457e6e9a5 Refactor code. Fix a potential missing check. Teach isIdentical() about tLDRpci_pic. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86330 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-07 04:04:34 +00:00
Evan Cheng
d3e18fad7e These are done / no longer care. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85798 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 07:58:25 +00:00
Evan Cheng
e3b88fc01e Add an entry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85797 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-02 07:51:19 +00:00
Bob Wilson
57f224a5a4 Add a note about Robert Muth's alternate jump table implementation. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85624 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-30 22:22:46 +00:00
Evan Cheng
5adb66a646 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82982 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-28 09:14:39 +00:00
Chris Lattner
513503961d add a random codegen deficiency. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77598 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-30 16:08:58 +00:00
Evan Cheng
40efc251cd Disable my constant island pass optimization (to make use soimm more effectively). It caused infinite looping on lencod. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76995 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-24 19:31:03 +00:00
Evan Cheng
064a6eacab Add an entry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76711 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-07-22 00:58:27 +00:00
Evan Cheng
055b0310f8 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74420 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-06-29 07:51:04 +00:00
Evan Cheng
151b9afdee Add a note about commuting conditional move. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74241 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-06-26 00:28:48 +00:00
Evan Cheng
b604b2c470 These are done / no longer applicable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74239 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-06-26 00:25:27 +00:00
Bob Wilson
5bafff36c7 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73919 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-06-22 23:27:02 +00:00
Chris Lattner
a3f61df4ff several entries got significantly better, though they still aren't done. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44382 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-27 22:41:52 +00:00
Chris Lattner
f1b1c5ed1a implement a trivial readme entry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44380 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-27 22:36:16 +00:00
Chris Lattner
3a7c33a853 Add an easy microoptimization I noticed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43164 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-10-19 03:29:26 +00:00
Chris Lattner
bf8ae84a21 Add some notes about better flag handling. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41808 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-09-10 21:43:18 +00:00
Evan Cheng
c608ff22e7 Update. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38513 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-10 21:49:47 +00:00
Dale Johannesen
9118dbc7bd Remove item: thumb padding in constant islands 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36586 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-30 00:32:06 +00:00
Chris Lattner
93305bc462 add a crazy idea 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36273 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-20 20:18:43 +00:00
Chris Lattner
3c30d10b04 add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36203 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-17 18:03:00 +00:00
Evan Cheng
a125cbe839 Updated. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35229 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-20 22:32:39 +00:00
Evan Cheng
1a9da0d66c Minor stuff. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35049 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-09 19:46:06 +00:00
Evan Cheng
44f4fca3c0 Add comments about LSR / ARM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35048 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-09 19:35:33 +00:00
Evan Cheng
2265b49193 Unfinished work and ideas related to register scavenger. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35047 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-09 19:34:51 +00:00
Dale Johannesen
818c085232 apply comments from review of last patch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35045 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-09 19:18:59 +00:00
Dale Johannesen
a6bc6fc170 Add some observations from CoreGraphics benchmark. Remove register 
scavenging todo item, since it is now implemented.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35044 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-03-09 17:58:17 +00:00
Dale Johannesen
f1b214d3ca Add intelligence about where to break large blocks. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34755 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-28 18:41:23 +00:00
Dale Johannesen
ce74de46dd cosmetic changes from review of last patch. obvious 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34598 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-25 18:31:31 +00:00
Dale Johannesen
99c49a4b94 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.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34563 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-25 00:47:03 +00:00
Dale Johannesen
88e37ae366 rewrite of constant islands 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34523 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-23 05:02:36 +00:00
Chris Lattner
2d1222c060 add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33778 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-02-02 04:36:46 +00:00
Evan Cheng
a8e2989ece ARM backend contribution from Apple. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33353 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-19 07:51:42 +00:00
Rafael Espindola
4dfab986ab add note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32452 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-11 23:56:10 +00:00
Rafael Espindola
f621abca9e add FSTD and FSTS 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30996 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-17 13:36:07 +00:00