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155 Commits

Author SHA1 Message Date
Chris Lattner 9dd7df7ee7 new example 
llvm-svn: 25903
 2006-02-02 07:37:11 +00:00
Nate Begeman cd018525f8 Update the README 
llvm-svn: 25902
 2006-02-02 07:27:56 +00:00
Chris Lattner a983beab37 add a note 
llvm-svn: 25876
 2006-02-01 17:54:23 +00:00
Nate Begeman 7e7f439f85 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 a0527473ac another testcase. 
llvm-svn: 25862
 2006-02-01 00:28:12 +00:00
Chris Lattner b0fe138b65 example nate pointed out 
llvm-svn: 25841
 2006-01-31 07:16:34 +00:00
Chris Lattner a9bfca8d1e add the 'lucas' optimization 
llvm-svn: 25830
 2006-01-31 02:55:28 +00:00
Chris Lattner 0c7b4666a3 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 6c82262289 Add a couple more things to the readme. 
llvm-svn: 25724
 2006-01-28 01:22:10 +00:00
Chris Lattner c3c27032d0 add a note 
llvm-svn: 25439
 2006-01-19 02:09:38 +00:00
Chris Lattner 7c76290038 add notes from my *other* email acct. 
llvm-svn: 25362
 2006-01-16 17:58:54 +00:00
Chris Lattner b2eacf48aa transfer some notes from my email to somewhere useful. 
llvm-svn: 25361
 2006-01-16 17:53:00 +00:00
Nate Begeman f2b38dbdc7 Remove some redundant stuff out of the readme. 
llvm-svn: 25308
 2006-01-14 01:24:22 +00:00
Nate Begeman 9aea6e4691 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 ffe3542726 move some random notes out of my email into someplace useful 
llvm-svn: 24956
 2005-12-22 17:19:28 +00:00
Chris Lattner 29e6c3dbf9 Add another important case we miss 
llvm-svn: 24639
 2005-12-08 07:13:28 +00:00
Chris Lattner 5aba6ae3b3 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 75fe59c4ea add a case Nate sent me 
llvm-svn: 24195
 2005-11-05 08:57:56 +00:00
Chris Lattner e507a15184 This is implemented 
llvm-svn: 24107
 2005-10-30 06:42:12 +00:00
Nate Begeman 00cea9b2e0 New case to handle someday 
llvm-svn: 24075
 2005-10-28 23:26:57 +00:00
Chris Lattner a0dfc67ae6 a bad case for bitfield insert 
llvm-svn: 24051
 2005-10-28 00:20:45 +00:00
Nate Begeman ff1796534f 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 53b9c3ad4c add a case 
llvm-svn: 23785
 2005-10-18 06:30:51 +00:00
Nate Begeman 6cca84e43c 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 e9e2c6d314 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 1e98a330f2 add an idea 
llvm-svn: 23020
 2005-08-24 18:15:24 +00:00
Chris Lattner 5e3953d761 add a note 
llvm-svn: 22982
 2005-08-23 06:27:59 +00:00
Nate Begeman 83f6b98c42 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 54ee86aca7 add a optimization note 
llvm-svn: 22732
 2005-08-09 22:30:57 +00:00
Chris Lattner 11fc319b5d add a note 
llvm-svn: 22681
 2005-08-05 19:18:32 +00:00
Nate Begeman 8e2411334c 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 1defb7fe80 add a note about the red zone 
llvm-svn: 22518
 2005-07-26 19:07:51 +00:00
Nate Begeman 7b8733571e Update the PPC readme 
llvm-svn: 22516
 2005-07-26 18:59:06 +00:00
Nate Begeman 08698cf644 Update PPC readme. Remove things that are done or aren't ppc specific 
llvm-svn: 21232
 2005-04-11 20:48:57 +00:00
Nate Begeman 0822032c95 Put int the getReg cast optimization from x86 so that we generate fewer 
move instructions for the register allocator to coalesce.

llvm-svn: 17608
 2004-11-08 02:25:40 +00:00
Nate Begeman 4c6e1d694c Update to-do list 
llvm-svn: 17235
 2004-10-26 04:10:53 +00:00
Nate Begeman 4bfceb1ed5 All PPC instructions are now auto-printed 
32 and 64 bit AsmWriters unified
Darwin and AIX specific features of AsmWriter split out

llvm-svn: 16163
 2004-09-04 05:00:00 +00:00
Nate Begeman 8cb6bd5f3c Improvements to int->float cast code for PPC-64 
llvm-svn: 16105
 2004-08-29 22:02:43 +00:00
Nate Begeman 4483df8b63 Implement the following missing functionality in the PPC backend: 
cast fp->bool
cast ulong->fp
algebraic right shift long by non-constant value
These changes tested across most of the test suite.  Fixes Regression/casts

llvm-svn: 16081
 2004-08-29 08:19:32 +00:00
Nate Begeman abf3c4d787 remove some things from the todo list. 
llvm-svn: 15956
 2004-08-20 18:46:54 +00:00
Nate Begeman ab6b08d937 Update the current state of the world 
llvm-svn: 15809
 2004-08-16 05:06:43 +00:00
Nate Begeman 78862c3717 Add future optimization opportunity 
llvm-svn: 15760
 2004-08-15 06:43:10 +00:00
Nate Begeman 412602d7d9 Replace PowerPCPEI.cpp with target independant PrologEpilogInserter 
llvm-svn: 15746
 2004-08-14 22:16:36 +00:00
Nate Begeman 63be70d8f2 Fix casts of float to unsigned long 
Replace STDX (store 64 bit int indexed) with STFDX (store double indexed)
Fix latent bug in indexed load generation
Generate indexed loads and stores in many more cases

llvm-svn: 15626
 2004-08-10 20:42:36 +00:00
Chris Lattner a8dcf2423e Changes commited for Nate Begeman: 
Use a PowerPC specific prolog epilog inserter to control where spilled
callee save regs are placed on the stack.
Get rid of implicit return address stack slot, save return address reg
(LR) in appropriate slot
Improve code generated for functions that don't have calls or access
globals


Note from Chris: PowerPCPEI will eventually be eliminated, once the
functionality is merged into CodeGen/PrologEpilogInserter.cpp

llvm-svn: 15536
 2004-08-06 06:58:50 +00:00
Misha Brukman 695d50d030 * Conditional save/restore of LR disabled as it's not quite correct 
* sumarray2d fixed: large fixed-size alloca
* make is now compileable
* Re-organized tests to fit them under proper headings

Patch by Nate Begeman.

llvm-svn: 15347
 2004-07-30 15:53:09 +00:00
Misha Brukman 7f01b2539b Add notes on bug involving casting ulong -> double, thanks to Nate Begeman. 
llvm-svn: 15307
 2004-07-28 19:16:10 +00:00
Misha Brukman bd1d7dceb7 Reorganize tests to place them in proper directories. 
llvm-svn: 15298
 2004-07-28 00:55:12 +00:00
Misha Brukman 04dee3bb66 UnitTests 2003-05-26-Shorts and 2003-07-09-LoadShorts have been fixed; 
2003-05-22-VarSizeArray is broken.

llvm-svn: 15297
 2004-07-28 00:01:41 +00:00
Misha Brukman 2ffb787446 Branch selection support implemented by Nate Begeman for long branches. 
llvm-svn: 15288
 2004-07-27 18:43:04 +00:00
Misha Brukman 9eaa879f49 Fixed saving/restoring LR unconditionally, only done as necessary. 
llvm-svn: 15275
 2004-07-27 17:17:48 +00:00
Misha Brukman d815472ebd More notes on bugs, unimplemented features, and suggested code improvements. 
Written by Nate Begeman.

llvm-svn: 15235
 2004-07-26 16:23:55 +00:00
Misha Brukman 8930d4f24e Running list of bugs, unimplemented features, currently broken tests, until we 
have a nightly tester set up for PowerPC.

llvm-svn: 15147
 2004-07-23 22:37:22 +00:00
Misha Brukman a97f29237e This file is no longer applicable. 
llvm-svn: 14294
 2004-06-21 20:17:41 +00:00
Misha Brukman e05203fb40 Initial revision 
llvm-svn: 14283
 2004-06-21 16:55:25 +00:00