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295 Commits

Author SHA1 Message Date
Arnold Schwaighofer
6bcd9e7ec2 Corrected many typing errors. And removed 'nest' parameter handling 
for fastcc from X86CallingConv.td.  This means that nested functions
are not supported for calling convention 'fastcc'.

llvm-svn: 42934
 2007-10-12 21:30:57 +00:00
Evan Cheng
c36fdf163a Update. 
llvm-svn: 42922
 2007-10-12 18:22:55 +00:00
Arnold Schwaighofer
d47210011e Added tail call optimization to the x86 back end. It can be 
enabled by passing -tailcallopt to llc.  The optimization is
performed if the following conditions are satisfied:
* caller/callee are fastcc
* elf/pic is disabled OR
  elf/pic enabled + callee is in module + callee has
  visibility protected or hidden

llvm-svn: 42870
 2007-10-11 19:40:01 +00:00
Dan Gohman
9546d48e97 This is done. 
llvm-svn: 42785
 2007-10-09 15:42:21 +00:00
Evan Cheng
e0e36e4a0e This is done. 
llvm-svn: 42656
 2007-10-05 22:34:59 +00:00
Chris Lattner
4224151a44 add a note. 
llvm-svn: 42607
 2007-10-04 15:47:27 +00:00
Chris Lattner
a31fa80185 add a note 
llvm-svn: 42579
 2007-10-03 17:10:03 +00:00
Chris Lattner
dfcb750656 Bill's example is still not enough to repro this, but it has other issues that 
seem significant as well.

llvm-svn: 42564
 2007-10-03 03:40:24 +00:00
Bill Wendling
c5fbf331ff Another micro-opt. 
llvm-svn: 42554
 2007-10-02 21:49:31 +00:00
Bill Wendling
c4a53b617f Another missed optimization with LICM. 
llvm-svn: 42552
 2007-10-02 21:43:06 +00:00
Bill Wendling
0159f0c5ba Now with LL code! 
llvm-svn: 42547
 2007-10-02 20:54:32 +00:00
Bill Wendling
48c27bf598 Another missed optimization. 
llvm-svn: 42546
 2007-10-02 20:42:59 +00:00
Chris Lattner
86e73ac224 move PR1160 here. 
llvm-svn: 42347
 2007-09-26 06:29:31 +00:00
Evan Cheng
b639648fc5 New entry. 
llvm-svn: 41810
 2007-09-10 22:16:37 +00:00
Chris Lattner
d4602cc0e7 Add some notes about better flag handling. 
llvm-svn: 41808
 2007-09-10 21:43:18 +00:00
Chris Lattner
9b22d7527c add some notes on really poor codegen. 
llvm-svn: 41319
 2007-08-23 15:22:07 +00:00
Chris Lattner
fdb4d38108 add a note 
llvm-svn: 41178
 2007-08-20 02:14:33 +00:00
Chris Lattner
fedbfd5f47 expand a note 
llvm-svn: 41021
 2007-08-11 18:19:07 +00:00
Chris Lattner
5f098dbbe5 With evan's explicit flag representation, hopefully we will finally be 
able to 3-addressify away stuff like this:

        movl    %ecx, %eax
        decl    %eax

llvm-svn: 41020
 2007-08-11 18:16:46 +00:00
Christopher Lamb
7e52a97df5 Use subregs to improve any_extend code generation when feasible. 
llvm-svn: 41013
 2007-08-10 22:22:41 +00:00
Christopher Lamb
450f6815b9 Increase efficiency of sign_extend_inreg by using subregisters for truncation. As the README suggests sign_extend_subreg is selected to (sext(trunc)). 
llvm-svn: 41010
 2007-08-10 21:48:46 +00:00
Christopher Lamb
4e6cae3eae Edit README in light of previous LEA16 commit. 
llvm-svn: 41009
 2007-08-10 21:29:05 +00:00
Chris Lattner
a9026e5f12 add an observation 
llvm-svn: 40772
 2007-08-03 00:17:42 +00:00
Evan Cheng
30e121adf6 Only adjust esp around calls in presence of alloca. 
llvm-svn: 40028
 2007-07-19 00:42:05 +00:00
Evan Cheng
cee32b53a4 New entry. 
llvm-svn: 39998
 2007-07-18 08:21:49 +00:00
Evan Cheng
70b79bfa0e Update. 
llvm-svn: 39977
 2007-07-17 18:39:45 +00:00
Chris Lattner
a7834d79a0 add a note 
llvm-svn: 37239
 2007-05-18 20:18:14 +00:00
Chris Lattner
96e9e88590 add some notes 
llvm-svn: 36965
 2007-05-10 00:08:04 +00:00
Chris Lattner
9f8e81f9d3 move CodeGen/X86/overlap-add.ll here. 
llvm-svn: 36799
 2007-05-05 22:10:24 +00:00
Chris Lattner
be225f5300 SSE4 is apparently public now. 
llvm-svn: 36185
 2007-04-17 00:02:37 +00:00
Chris Lattner
6fbfbf6622 add a note 
llvm-svn: 36028
 2007-04-14 23:06:09 +00:00
Chris Lattner
b7448f6187 done 
llvm-svn: 35884
 2007-04-11 05:34:00 +00:00
Chris Lattner
60f3ece40f new micro optzn 
llvm-svn: 35867
 2007-04-10 21:14:01 +00:00
Chris Lattner
78271f0596 make a new missing features section 
llvm-svn: 35637
 2007-04-03 23:41:34 +00:00
Bill Wendling
ff2c460267 Updated 
llvm-svn: 35634
 2007-04-03 23:37:20 +00:00
Chris Lattner
a710f7442c add a note 
llvm-svn: 35435
 2007-03-28 18:17:19 +00:00
Dale Johannesen
fb7b59f5dd add generation of unnecessary push/pop around calls 
llvm-svn: 35241
 2007-03-21 21:16:39 +00:00
Evan Cheng
fc80b5b712 Notes about codegen issues. 
llvm-svn: 35107
 2007-03-14 21:03:53 +00:00
Chris Lattner
e29ef5d9cb add a note 
llvm-svn: 34837
 2007-03-02 05:04:52 +00:00
Chris Lattner
97739dcbca more notes 
llvm-svn: 34204
 2007-02-12 21:20:26 +00:00
Chris Lattner
216d889852 add a note 
llvm-svn: 34202
 2007-02-12 20:26:34 +00:00
Evan Cheng
400120abe5 This is done. 
llvm-svn: 34072
 2007-02-08 23:53:38 +00:00
Chris Lattner
601692407e add a note 
llvm-svn: 33423
 2007-01-21 07:03:37 +00:00
Chris Lattner
851b9e93a2 add some notes 
llvm-svn: 33228
 2007-01-15 06:25:39 +00:00
Anton Korobeynikov
548b9af9c2 * PIC codegen for X86/Linux has been implemented 
* PIC-aware internal structures in X86 Codegen have been refactored
* Visibility (default/weak) has been added
* Docs fixes (external weak linkage, visibility, formatting)

llvm-svn: 33136
 2007-01-12 19:20:47 +00:00
Chris Lattner
aed0e0292b new note 
llvm-svn: 32945
 2007-01-06 01:30:45 +00:00
Chris Lattner
aaafc3d16b fix testcase. It's not safe to strictly evaluate a load that should be lazy. 
llvm-svn: 32842
 2007-01-03 19:12:31 +00:00
Chris Lattner
f04c00f475 add a note 
llvm-svn: 32741
 2006-12-22 01:03:22 +00:00
Chris Lattner
8f2a26ac12 Update note, with the SROA change, we now produce: 
_pairtest:
        movl 8(%esp), %eax
        movl 4(%esp), %ecx
        movd %eax, %xmm0
        movd %ecx, %xmm1
        addss %xmm0, %xmm1
        movl 12(%esp), %eax
        movss %xmm1, (%eax)
        ret

instead of:

_pairtest:
        subl $12, %esp
        movl 20(%esp), %eax
        movl %eax, 4(%esp)
        movl 16(%esp), %eax
        movl %eax, (%esp)
        movss (%esp), %xmm0
        addss 4(%esp), %xmm0
        movl 24(%esp), %eax
        movss %xmm0, (%eax)
        addl $12, %esp
        ret

llvm-svn: 32427
 2006-12-11 01:20:25 +00:00
Evan Cheng
27408161df New entries. 
llvm-svn: 31976
 2006-11-28 19:59:25 +00:00
Chris Lattner
da103686a6 it would be nice of ctlz were lowered to bsf etc. 
llvm-svn: 31730
 2006-11-14 08:08:46 +00:00
Evan Cheng
8c372dc9b3 These are done. 
llvm-svn: 31649
 2006-11-10 22:03:35 +00:00
Chris Lattner
3826e15c8d this part implemented. 
llvm-svn: 31122
 2006-10-22 21:40:12 +00:00
Chris Lattner
9777da8fb7 add a note 
llvm-svn: 30921
 2006-10-12 22:01:26 +00:00
Chris Lattner
399106d8f8 ugly codegen 
llvm-svn: 30769
 2006-10-06 17:39:34 +00:00
Evan Cheng
6fc0ae2136 Do away with CPU feature list. Just use CPUID to detect MMX, SSE, SSE2, SSE3, and 64-bit support. 
llvm-svn: 30763
 2006-10-06 08:21:07 +00:00
Chris Lattner
ba7013ca78 implemented 
llvm-svn: 30559
 2006-09-21 06:14:54 +00:00
Chris Lattner
437703d4c9 Fit in 80-cols 
llvm-svn: 30556
 2006-09-21 05:46:00 +00:00
Chris Lattner
f9c4e07bf7 add a note 
llvm-svn: 30515
 2006-09-20 06:32:10 +00:00
Chris Lattner
68009a61c5 add a note. Our 64-bit shifts are ~30% slower than gcc's 
llvm-svn: 30457
 2006-09-18 05:36:54 +00:00
Anton Korobeynikov
7c2118575c Added some eye-candy for Subtarget type checking 
Added X86 StdCall & FastCall calling conventions. Codegen will follow.

llvm-svn: 30446
 2006-09-17 20:25:45 +00:00
Chris Lattner
22b3d6fba9 add a note 
llvm-svn: 30406
 2006-09-16 03:30:19 +00:00
Chris Lattner
0e9985d635 add note about switch lowering 
llvm-svn: 30308
 2006-09-13 23:37:16 +00:00
Chris Lattner
fb0e19072c new note 
llvm-svn: 30286
 2006-09-13 04:19:50 +00:00
Chris Lattner
56e461c7d2 new note 
llvm-svn: 30285
 2006-09-13 03:54:54 +00:00
Chris Lattner
806ef17e5b Compile X > -1 -> text X,X; js dest 
This implements CodeGen/X86/jump_sign.ll.

llvm-svn: 30283
 2006-09-13 03:22:10 +00:00
Chris Lattner
67fe605123 add a note 
llvm-svn: 30271
 2006-09-12 06:36:01 +00:00
Chris Lattner
525974551b Testcase noticed from PR906 
llvm-svn: 30269
 2006-09-11 23:00:56 +00:00
Chris Lattner
e7cd7508ed add compilable testcase 
llvm-svn: 30268
 2006-09-11 22:57:51 +00:00
Evan Cheng
78f5fae07f Updates. 
llvm-svn: 30245
 2006-09-11 05:35:17 +00:00
Evan Cheng
64720acdb9 Update README file. 
llvm-svn: 30244
 2006-09-11 05:25:15 +00:00
Chris Lattner
7476a6c710 add a note 
llvm-svn: 29722
 2006-08-16 02:47:44 +00:00
Nate Begeman
7d4b0d0b9b Update the readme to remove duplicate information and clarify the loop 
problem.

llvm-svn: 29468
 2006-08-02 05:31:20 +00:00
Evan Cheng
27c53dc36e New entry. 
llvm-svn: 29310
 2006-07-26 21:49:52 +00:00
Evan Cheng
56e0c65937 Done. 
llvm-svn: 29262
 2006-07-21 23:07:23 +00:00
Evan Cheng
6e440c39da New entry. 
llvm-svn: 29215
 2006-07-19 21:29:30 +00:00
Evan Cheng
793f3d97ff Misc. new entry. 
llvm-svn: 29202
 2006-07-19 06:06:24 +00:00
Evan Cheng
e3b8db6dda A new entry. 
llvm-svn: 28848
 2006-06-17 00:45:49 +00:00
Chris Lattner
4c7ba81f59 Add a note that Nate noticed. 
llvm-svn: 28808
 2006-06-15 21:33:31 +00:00
Evan Cheng
8d9b7650f1 A few new entries. 
llvm-svn: 28683
 2006-06-04 09:08:00 +00:00
Evan Cheng
ced05ab1b4 Add a note about integer multiplication by constants. 
llvm-svn: 28551
 2006-05-30 07:37:37 +00:00
Evan Cheng
1891844780 Some new entries about truncate / anyext 
llvm-svn: 28548
 2006-05-30 06:23:50 +00:00
Evan Cheng
c25e986c9f A isel deficiency. 
llvm-svn: 28427
 2006-05-22 05:54:49 +00:00
Evan Cheng
bb6733743e A new entry 
llvm-svn: 28419
 2006-05-20 07:44:53 +00:00
Chris Lattner
6ab04ce0cd Add a note 
llvm-svn: 28401
 2006-05-19 20:55:31 +00:00
Chris Lattner
49a93a0ec9 Split the SSE readme items out into their own README. 
llvm-svn: 28400
 2006-05-19 20:51:43 +00:00
Chris Lattner
95b6519d62 Split FP-stack notes out of the main readme. Next up: splitting out SSE. 
llvm-svn: 28399
 2006-05-19 20:45:52 +00:00
Chris Lattner
c29ff5f8b1 Particularly ugly code. 
llvm-svn: 28397
 2006-05-19 19:41:33 +00:00
Chris Lattner
c0653d237a add a note 
llvm-svn: 28383
 2006-05-18 17:38:16 +00:00
Evan Cheng
3034b633f6 Another entry 
llvm-svn: 28370
 2006-05-17 21:20:51 +00:00
Evan Cheng
b84a79a336 Another entry 
llvm-svn: 28356
 2006-05-17 19:05:31 +00:00
Evan Cheng
1f5c530d04 Remove a completed entry. 
llvm-svn: 28199
 2006-05-09 06:54:05 +00:00
Chris Lattner
5609ba71a5 Another bad case I noticed 
llvm-svn: 28177
 2006-05-08 21:39:45 +00:00
Chris Lattner
4f3345f1f1 add a note 
llvm-svn: 28176
 2006-05-08 21:24:21 +00:00
Nate Begeman
d9438bedaa Remove some stuff from the README 
llvm-svn: 28063
 2006-05-02 22:43:31 +00:00
Chris Lattner
53275cb616 Add a note 
llvm-svn: 27998
 2006-04-27 21:40:57 +00:00
Evan Cheng
efbc112b7c A couple of new entries. 
llvm-svn: 27993
 2006-04-27 08:31:33 +00:00
Evan Cheng
b7a2ab21a5 Add a new entry. 
llvm-svn: 27963
 2006-04-24 23:30:10 +00:00
Evan Cheng
f74b046b06 Remove a completed entry. 
llvm-svn: 27958
 2006-04-24 17:38:16 +00:00
Chris Lattner
86f1e02800 Add a note 
llvm-svn: 27954
 2006-04-23 19:47:09 +00:00
Chris Lattner
d81dcf9da4 fix thinko 
llvm-svn: 27935
 2006-04-21 21:05:22 +00:00
Chris Lattner
84a811d57e add some low-prio notes 
llvm-svn: 27934
 2006-04-21 21:03:21 +00:00
Chris Lattner
99c7c3ad2f Add a note. 
llvm-svn: 27827
 2006-04-19 05:53:27 +00:00
Evan Cheng
6be2e4b419 Correct comments 
llvm-svn: 27790
 2006-04-18 03:45:01 +00:00
Evan Cheng
13a5022494 Another entry 
llvm-svn: 27786
 2006-04-18 01:22:57 +00:00
Evan Cheng
2f9011cd87 Another entry. 
llvm-svn: 27784
 2006-04-18 00:21:01 +00:00
Evan Cheng
32e5d4f6bc Silly bug 
llvm-svn: 27719
 2006-04-15 05:37:34 +00:00
Evan Cheng
cc83472e2d New entry 
llvm-svn: 27697
 2006-04-14 07:24:04 +00:00
Evan Cheng
d6cad69ef4 Update 
llvm-svn: 27643
 2006-04-13 05:09:45 +00:00
Evan Cheng
2c2d734efd All "integer" logical ops (pand, por, pxor) are now promoted to v2i64. 
Clean up and fix various logical ops issues.

llvm-svn: 27633
 2006-04-12 21:21:57 +00:00
Chris Lattner
2879e2222e add a note 
llvm-svn: 27567
 2006-04-10 21:51:03 +00:00
Evan Cheng
34dd1c80dd Remove an entry that is now done. 
llvm-svn: 27565
 2006-04-10 21:42:57 +00:00
Evan Cheng
255a990223 Correct an entry 
llvm-svn: 27563
 2006-04-10 21:41:39 +00:00
Evan Cheng
5326565791 New entries 
llvm-svn: 27555
 2006-04-10 07:22:03 +00:00
Evan Cheng
0dd7987d36 Keep track of an Mac OS X / x86 ABI bug. 
llvm-svn: 27496
 2006-04-07 21:19:53 +00:00
Evan Cheng
e248d318a8 New entries. 
llvm-svn: 27473
 2006-04-06 23:21:24 +00:00
Evan Cheng
dcf423ad74 An entry about comi / ucomi intrinsics. 
llvm-svn: 27445
 2006-04-05 23:46:04 +00:00
Evan Cheng
6e8b924416 Another entry about shuffles. 
llvm-svn: 27245
 2006-03-29 03:03:46 +00:00
Evan Cheng
a96380ba3f Update 
llvm-svn: 27220
 2006-03-28 06:55:45 +00:00
Evan Cheng
ca067debe3 Added a couple of entries about movhps and movlhps. 
llvm-svn: 27212
 2006-03-28 02:49:12 +00:00
Evan Cheng
9accac09cd All unpack cases are now being handled. 
llvm-svn: 27211
 2006-03-28 02:44:05 +00:00
Nate Begeman
507e293848 Readme note 
llvm-svn: 27152
 2006-03-26 19:19:27 +00:00
Chris Lattner
ace2d0d227 Gabor points out that we can't spell. :) 
llvm-svn: 27049
 2006-03-24 07:12:19 +00:00
Evan Cheng
8507228441 All v2f64 shuffle cases can be handled. 
llvm-svn: 27044
 2006-03-24 06:40:32 +00:00
Evan Cheng
184c4b937e A new entry 
llvm-svn: 27039
 2006-03-24 02:57:03 +00:00
Evan Cheng
a56ed39464 Combine 2 entries 
llvm-svn: 26921
 2006-03-21 07:18:26 +00:00
Evan Cheng
f8d8d45ff8 Add a note about x86 register coallescing 
llvm-svn: 26920
 2006-03-21 07:12:57 +00:00
Chris Lattner
9a87d3e90d add a note with a testcase 
llvm-svn: 26877
 2006-03-19 22:27:41 +00:00
Evan Cheng
98b79bf7ec Remember which tests are hurt by LSR. 
llvm-svn: 26860
 2006-03-19 06:08:11 +00:00
Evan Cheng
33055a8aba A new entry. 
llvm-svn: 26810
 2006-03-16 22:44:22 +00:00
Chris Lattner
57acce1443 a couple of miscellaneous things. 
llvm-svn: 26625
 2006-03-09 01:39:46 +00:00
Chris Lattner
55fbd49ca9 add a note for something evan noticed 
llvm-svn: 26539
 2006-03-05 01:15:18 +00:00
Evan Cheng
65b5c2c680 Add an entry 
llvm-svn: 26520
 2006-03-04 07:49:50 +00:00
Evan Cheng
e5ae39621b Another entry. 
llvm-svn: 26430
 2006-02-28 23:38:49 +00:00
Evan Cheng
8a6f03bb0e Updates. 
llvm-svn: 26375
 2006-02-25 10:04:07 +00:00
Chris Lattner
23b302ce83 add a small and simple case. 
llvm-svn: 26326
 2006-02-23 05:17:43 +00:00
Evan Cheng
a85c267431 A couple of new entries. 
llvm-svn: 26325
 2006-02-23 02:50:21 +00:00
Evan Cheng
a0f9da472a Some updates 
llvm-svn: 26292
 2006-02-20 19:58:27 +00:00
Chris Lattner
13dd179299 add note about div by power of 2 
llvm-svn: 26253
 2006-02-17 04:20:13 +00:00
Evan Cheng
c7b32ddecc Remind ourselves to revisit the "pxor vs. xorps/xorpd to clear XMM registers" 
issue. Need to do more experiments.

llvm-svn: 26247
 2006-02-17 00:04:28 +00:00
Evan Cheng
3d0135afdc Remove the entry about using movapd for SSE reg-reg moves. 
llvm-svn: 26245
 2006-02-17 00:00:58 +00:00
Evan Cheng
53c574c6fa Remove an entry. 
llvm-svn: 26197
 2006-02-15 01:56:48 +00:00
Chris Lattner
17226f6adc new note 
llvm-svn: 26186
 2006-02-14 22:19:54 +00:00
Evan Cheng
030631350f Add a entry. 
llvm-svn: 26173
 2006-02-14 08:25:32 +00:00
Evan Cheng
53c409e694 Remove a completed entry; add a new entry about fisttp op 
llvm-svn: 26105
 2006-02-10 05:48:15 +00:00
Chris Lattner
9cc9988279 add a simple optimization 
llvm-svn: 26062
 2006-02-08 17:47:22 +00:00
Chris Lattner
560429667e more email -> README moving 
llvm-svn: 26054
 2006-02-08 07:12:07 +00:00
Chris Lattner
a4b6082b7a Add some random notes, not high-prio 
llvm-svn: 26052
 2006-02-08 06:52:06 +00:00
Evan Cheng
a7d31e53e8 Remind myself to add PIC and static asm printer support. 
llvm-svn: 26037
 2006-02-07 08:35:44 +00:00
Chris Lattner
172cf85d48 remove some target-indep and implemented notes 
llvm-svn: 25930
 2006-02-03 06:22:11 +00:00