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124 Commits

Author SHA1 Message Date
Nate Begeman
81e8097377 Remove BRTWOWAY* 
Make the PPC backend not dependent on BRTWOWAY_CC and make the branch
selector smarter about the code it generates, fixing a case in the
readme.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26814 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-17 01:40:33 +00:00
Nate Begeman
1ad9b3a3cc Notes on how to kill the eeevil brtwoway, and make ppc branch selector 
more target independant, generate better code, and be less conservative.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26809 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-16 22:37:48 +00:00
Chris Lattner
ed51169cd8 add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26807 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-16 22:25:55 +00:00
Nate Begeman
2df992883b Another case we could do better on. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26795 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-16 18:50:44 +00:00
Chris Lattner
49f398b96a add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26605 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-08 00:25:47 +00:00
Chris Lattner
5a63c47fb5 add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26585 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-07 04:42:59 +00:00
Chris Lattner
00d18f0879 add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26448 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-01 06:36:20 +00:00
Chris Lattner
5126984b1d 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26447 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-01 05:50:56 +00:00
Chris Lattner
8c13d0a573 Use a target-specific dag-combine to implement CodeGen/PowerPC/fp-int-fp.ll. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26445 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-01 04:57:39 +00:00
Chris Lattner
f4c8575c27 remove implemented item 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26418 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-28 06:36:04 +00:00
Nate Begeman
6e53ceb0d4 readme updates 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26405 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-27 22:08:36 +00:00
Chris Lattner
8d3f490991 Move emails from nate into public places 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26051 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-08 06:43:51 +00:00
Chris Lattner
213845367c add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25984 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-05 05:27:35 +00:00
Nate Begeman
a6973c348b Remove some stuff that now works 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25963 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-04 07:29:35 +00:00
Chris Lattner
1541bc3a23 add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25944 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-03 22:06:45 +00:00
Chris Lattner
33c1dab0bd remove some target-indep and implemented notes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25930 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-03 06:22:11 +00:00
Nate Begeman
a63fee898b Flesh out a couple of the items in the README 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25928 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-03 05:17:06 +00:00
Chris Lattner
d463f7f698 Add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25921 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-03 01:49:49 +00:00
Chris Lattner
39b248b79e update a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25918 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-02 23:50:22 +00:00
Chris Lattner
275b8846d5 new example 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25903 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-02 07:37:11 +00:00
Nate Begeman
93c740bbbb Update the README 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25902 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-02 07:27:56 +00:00
Chris Lattner
5a7efc9d4f add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25876 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-01 17:54:23 +00:00
Nate Begeman
750ac1bdfa Fix some of the stuff in the PPC README file, and clean up legalization 
of the SELECT_CC, BR_CC, and BRTWOWAY_CC nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25875 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-01 07:19:44 +00:00
Chris Lattner
0ddc18047d another testcase. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25862 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-02-01 00:28:12 +00:00
Chris Lattner
83e64baaef example nate pointed out 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25841 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-31 07:16:34 +00:00
Chris Lattner
56b6964473 add the 'lucas' optimization 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25830 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-31 02:55:28 +00:00
Chris Lattner
969097968c 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25733 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-28 05:40:47 +00:00
Nate Begeman
eb20ed6c86 Add a couple more things to the readme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25724 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-28 01:22:10 +00:00
Chris Lattner
3cda14ff3e add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25439 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-19 02:09:38 +00:00
Chris Lattner
98fbc2fd1b add notes from my *other* email acct. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25362 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-16 17:58:54 +00:00
Chris Lattner
1db4b4f5c4 transfer some notes from my email to somewhere useful. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25361 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-16 17:53:00 +00:00
Nate Begeman
6283760cd1 Remove some redundant stuff out of the readme. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25308 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-01-14 01:24:22 +00:00
Nate Begeman
50fb3c4986 Fix one of the things in the todo file, and get a bit closer to folding 
constant offsets from statics into the address arithmetic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24999 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-24 01:00:15 +00:00
Chris Lattner
39706e68a5 move some random notes out of my email into someplace useful 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24956 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-22 17:19:28 +00:00
Chris Lattner
62c08dd4a1 Add another important case we miss 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24639 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-12-08 07:13:28 +00:00
Chris Lattner
3eef4e377c 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24397 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-17 18:26:56 +00:00
Chris Lattner
ae4664a9f2 add a case Nate sent me 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24195 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-11-05 08:57:56 +00:00
Chris Lattner
b685af3e60 This is implemented 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24107 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-30 06:42:12 +00:00
Nate Begeman
167f1e2651 New case to handle someday 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24075 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-28 23:26:57 +00:00
Chris Lattner
0195910558 a bad case for bitfield insert 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24051 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-28 00:20:45 +00:00
Nate Begeman
5cd61ce1be Add a note about some bitfield stuff we could be doing better. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23994 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-25 23:50:02 +00:00
Chris Lattner
3d8df55fed add a case 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23785 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-18 06:30:51 +00:00
Nate Begeman
21e463b2bf More PPC32 -> PPC changes, as well as merging some classes that were 
redundant after the change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23759 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-10-16 05:39:50 +00:00
Nate Begeman
92cce90c66 Add note about future optimization noted in the ppc compiler writer's guide 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23245 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-09-06 15:30:48 +00:00
Chris Lattner
a3c4454c5f add an idea 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23020 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-24 18:15:24 +00:00
Chris Lattner
424dcbdb3b add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22982 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-23 06:27:59 +00:00
Nate Begeman
5a01481585 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22784 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-14 01:17:16 +00:00
Chris Lattner
c7e18a10d4 add a optimization note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22732 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-09 22:30:57 +00:00
Chris Lattner
6281ae4bf0 add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22681 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-05 19:18:32 +00:00
Nate Begeman
54eed36da5 Implement the optimization for the Red Zone on Darwin. This removes the 
unnecessary SP manipulation in leaf routines that don't need it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22522 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-27 06:06:29 +00:00
Chris Lattner
b65975a6ed add a note about the red zone 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22518 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-26 19:07:51 +00:00
Nate Begeman
4ad870ddcc Update the PPC readme 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22516 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-26 18:59:06 +00:00
Nate Begeman
ef9531efed Update PPC readme. Remove things that are done or aren't ppc specific 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21232 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-04-11 20:48:57 +00:00
Nate Begeman
676dee6ae9 Put int the getReg cast optimization from x86 so that we generate fewer 
move instructions for the register allocator to coalesce.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17608 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-11-08 02:25:40 +00:00
Nate Begeman
4a0de07e78 Update to-do list 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17235 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-10-26 04:10:53 +00:00
Nate Begeman
ed42853be1 All PPC instructions are now auto-printed 
32 and 64 bit AsmWriters unified
Darwin and AIX specific features of AsmWriter split out


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16163 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-09-04 05:00:00 +00:00
Nate Begeman
d332fd54f5 Improvements to int->float cast code for PPC-64 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16105 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-08-29 22:02:43 +00:00
Nate Begeman
f2f0781a10 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16081 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-08-29 08:19:32 +00:00
Nate Begeman
b65eadb7f5 remove some things from the todo list. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15956 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-08-20 18:46:54 +00:00
Nate Begeman
746a49516c Update the current state of the world 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15809 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-08-16 05:06:43 +00:00
Nate Begeman
f7bb8c0caa Add future optimization opportunity 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15760 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-08-15 06:43:10 +00:00
Nate Begeman
ca068e861b Replace PowerPCPEI.cpp with target independant PrologEpilogInserter 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15746 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-08-14 22:16:36 +00:00
Nate Begeman
b64af918cb 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15626 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-08-10 20:42:36 +00:00
Chris Lattner
3ea934668b 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15536 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-08-06 06:58:50 +00:00
Misha Brukman
88f8f9226f * 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15347 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-30 15:53:09 +00:00
Misha Brukman
8b88d906a2 Add notes on bug involving casting ulong -> double, thanks to Nate Begeman. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15307 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-28 19:16:10 +00:00
Misha Brukman
b9b8ba58e7 Reorganize tests to place them in proper directories. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15298 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-28 00:55:12 +00:00
Misha Brukman
56d38c6ca1 UnitTests 2003-05-26-Shorts and 2003-07-09-LoadShorts have been fixed; 
2003-05-22-VarSizeArray is broken.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15297 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-28 00:01:41 +00:00
Misha Brukman
4ce5ce25e8 Branch selection support implemented by Nate Begeman for long branches. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15288 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-27 18:43:04 +00:00
Misha Brukman
c91bc30436 Fixed saving/restoring LR unconditionally, only done as necessary. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15275 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-27 17:17:48 +00:00
Misha Brukman
bb966a4a59 More notes on bugs, unimplemented features, and suggested code improvements. 
Written by Nate Begeman.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15235 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-26 16:23:55 +00:00
Misha Brukman
1be339ac4c Running list of bugs, unimplemented features, currently broken tests, until we 
have a nightly tester set up for PowerPC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15147 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-07-23 22:37:22 +00:00
Misha Brukman
1e32f79d20 This file is no longer applicable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14294 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-21 20:17:41 +00:00
Misha Brukman
5dfe3a9c3b Initial revision 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14283 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-06-21 16:55:25 +00:00