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71 Commits

Author SHA1 Message Date
Nate Begeman
cbca1b3d14 Another case we could do better on. 
llvm-svn: 26795
 2006-03-16 18:50:44 +00:00
Chris Lattner
24aa564456 add a note 
llvm-svn: 26605
 2006-03-08 00:25:47 +00:00
Chris Lattner
ae34bbf56b add a note 
llvm-svn: 26585
 2006-03-07 04:42:59 +00:00
Chris Lattner
caec0d887c add a note 
llvm-svn: 26448
 2006-03-01 06:36:20 +00:00
Chris Lattner
137c02aa60 Compile this: 
void foo(float a, int *b) { *b = a; }

to this:

_foo:
        fctiwz f0, f1
        stfiwx f0, 0, r4
        blr

instead of this:

_foo:
        fctiwz f0, f1
        stfd f0, -8(r1)
        lwz r2, -4(r1)
        stw r2, 0(r4)
        blr

This implements CodeGen/PowerPC/stfiwx.ll, and also incidentally does the
right thing for GCC bugzilla 26505.

llvm-svn: 26447
 2006-03-01 05:50:56 +00:00
Chris Lattner
6ba976b557 Use a target-specific dag-combine to implement CodeGen/PowerPC/fp-int-fp.ll. 
llvm-svn: 26445
 2006-03-01 04:57:39 +00:00
Chris Lattner
866634d77f remove implemented item 
llvm-svn: 26418
 2006-02-28 06:36:04 +00:00
Nate Begeman
56a4dafd8d readme updates 
llvm-svn: 26405
 2006-02-27 22:08:36 +00:00
Chris Lattner
881c8c12ff Move emails from nate into public places 
llvm-svn: 26051
 2006-02-08 06:43:51 +00:00
Chris Lattner
59378e7675 add a note 
llvm-svn: 25984
 2006-02-05 05:27:35 +00:00
Nate Begeman
ba19f3f93c Remove some stuff that now works 
llvm-svn: 25963
 2006-02-04 07:29:35 +00:00
Chris Lattner
393e9d10dd add a note 
llvm-svn: 25944
 2006-02-03 22:06:45 +00:00
Chris Lattner
172cf85d48 remove some target-indep and implemented notes 
llvm-svn: 25930
 2006-02-03 06:22:11 +00:00
Nate Begeman
85f3c9f566 Flesh out a couple of the items in the README 
llvm-svn: 25928
 2006-02-03 05:17:06 +00:00
Chris Lattner
06f54e7cb3 Add a note 
llvm-svn: 25921
 2006-02-03 01:49:49 +00:00
Chris Lattner
66d0341e73 update a note 
llvm-svn: 25918
 2006-02-02 23:50:22 +00:00
Chris Lattner
c434ee61a3 new example 
llvm-svn: 25903
 2006-02-02 07:37:11 +00:00
Nate Begeman
dd4acf9710 Update the README 
llvm-svn: 25902
 2006-02-02 07:27:56 +00:00
Chris Lattner
821f93a659 add a note 
llvm-svn: 25876
 2006-02-01 17:54:23 +00:00
Nate Begeman
0be60963bd Fix some of the stuff in the PPC README file, and clean up legalization 
of the SELECT_CC, BR_CC, and BRTWOWAY_CC nodes.

llvm-svn: 25875
 2006-02-01 07:19:44 +00:00
Chris Lattner
c270dd87a9 another testcase. 
llvm-svn: 25862
 2006-02-01 00:28:12 +00:00
Chris Lattner
186b5f0887 example nate pointed out 
llvm-svn: 25841
 2006-01-31 07:16:34 +00:00
Chris Lattner
830b1ad8cf add the 'lucas' optimization 
llvm-svn: 25830
 2006-01-31 02:55:28 +00:00
Chris Lattner
170727421b add a note about how we should implement this FIXME from the legalizer: 
// FIXME: revisit this when we have some kind of mechanism by which targets
    // can decided legality of vector constants, of which there may be very
    // many.

llvm-svn: 25733
 2006-01-28 05:40:47 +00:00
Nate Begeman
a46156da35 Add a couple more things to the readme. 
llvm-svn: 25724
 2006-01-28 01:22:10 +00:00
Chris Lattner
60bc56e930 add a note 
llvm-svn: 25439
 2006-01-19 02:09:38 +00:00
Chris Lattner
88572bb5c4 add notes from my *other* email acct. 
llvm-svn: 25362
 2006-01-16 17:58:54 +00:00
Chris Lattner
62ab456f6b transfer some notes from my email to somewhere useful. 
llvm-svn: 25361
 2006-01-16 17:53:00 +00:00
Nate Begeman
10813e4f97 Remove some redundant stuff out of the readme. 
llvm-svn: 25308
 2006-01-14 01:24:22 +00:00
Nate Begeman
96c7e22231 Fix one of the things in the todo file, and get a bit closer to folding 
constant offsets from statics into the address arithmetic.

llvm-svn: 24999
 2005-12-24 01:00:15 +00:00
Chris Lattner
f7ed832fcf move some random notes out of my email into someplace useful 
llvm-svn: 24956
 2005-12-22 17:19:28 +00:00
Chris Lattner
9d9313e3c1 Add another important case we miss 
llvm-svn: 24639
 2005-12-08 07:13:28 +00:00
Chris Lattner
4581404290 Enable global address legalization, fixing a todo and allowing the removal 
of some code.  This exposes the implicit load from the stubs to the DAG, allowing
them to be optimized by the dag combiner.  It also moves darwin specific stuff
out of the isel into the legalizer, and allows more to be moved to the .td file.

llvm-svn: 24397
 2005-11-17 18:26:56 +00:00
Chris Lattner
dc19995e25 add a case Nate sent me 
llvm-svn: 24195
 2005-11-05 08:57:56 +00:00
Chris Lattner
802e8d3a7e This is implemented 
llvm-svn: 24107
 2005-10-30 06:42:12 +00:00
Nate Begeman
da6888930d New case to handle someday 
llvm-svn: 24075
 2005-10-28 23:26:57 +00:00
Chris Lattner
002ce4f1f8 a bad case for bitfield insert 
llvm-svn: 24051
 2005-10-28 00:20:45 +00:00
Nate Begeman
a63b42ad1e Add a note about some bitfield stuff we could be doing better. 
llvm-svn: 23994
 2005-10-25 23:50:02 +00:00
Chris Lattner
394413e59c add a case 
llvm-svn: 23785
 2005-10-18 06:30:51 +00:00
Nate Begeman
723637974b More PPC32 -> PPC changes, as well as merging some classes that were 
redundant after the change.

llvm-svn: 23759
 2005-10-16 05:39:50 +00:00
Nate Begeman
a94912c555 Add note about future optimization noted in the ppc compiler writer's guide 
llvm-svn: 23245
 2005-09-06 15:30:48 +00:00
Chris Lattner
8d151627a8 add an idea 
llvm-svn: 23020
 2005-08-24 18:15:24 +00:00
Chris Lattner
86a4a4745c add a note 
llvm-svn: 22982
 2005-08-23 06:27:59 +00:00
Nate Begeman
2426bb6589 Make FP_TO_UINT Illegal. This allows us to generate significantly better 
codegen for FP_TO_UINT by using the legalizer's SELECT variant.

Implement a codegen improvement for SELECT_CC, selecting the false node in
the MBB that feeds the phi node.  This allows us to codegen:
void foo(int *a, int b, int c) { int d = (a < b) ? 5 : 9; *a = d; }
as:
_foo:
        li r2, 5
        cmpw cr0, r4, r3
        bgt .LBB_foo_2  ; entry
.LBB_foo_1:     ; entry
        li r2, 9
.LBB_foo_2:     ; entry
        stw r2, 0(r3)
        blr

insted of:
_foo:
        li r2, 5
        li r5, 9
        cmpw cr0, r4, r3
        bgt .LBB_foo_2  ; entry
.LBB_foo_1:     ; entry
        or r2, r5, r5
.LBB_foo_2:     ; entry
        stw r2, 0(r3)
        blr

llvm-svn: 22784
 2005-08-14 01:17:16 +00:00
Chris Lattner
5ad0216bd6 add a optimization note 
llvm-svn: 22732
 2005-08-09 22:30:57 +00:00
Chris Lattner
d82395fc04 add a note 
llvm-svn: 22681
 2005-08-05 19:18:32 +00:00
Nate Begeman
54792213a7 Implement the optimization for the Red Zone on Darwin. This removes the 
unnecessary SP manipulation in leaf routines that don't need it.

llvm-svn: 22522
 2005-07-27 06:06:29 +00:00
Chris Lattner
9c98c4366a add a note about the red zone 
llvm-svn: 22518
 2005-07-26 19:07:51 +00:00
Nate Begeman
cd48821a69 Update the PPC readme 
llvm-svn: 22516
 2005-07-26 18:59:06 +00:00
Nate Begeman
f31b58f145 Update PPC readme. Remove things that are done or aren't ppc specific 
llvm-svn: 21232
 2005-04-11 20:48:57 +00:00