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path: root/lib/Target/PowerPC/README.txt
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* add a noteChris Lattner2007-03-31
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35530 91177308-0d34-0410-b5e6-96231b3b80d8
* add a noteChris Lattner2007-03-25
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35334 91177308-0d34-0410-b5e6-96231b3b80d8
* add a noteChris Lattner2007-03-25
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35330 91177308-0d34-0410-b5e6-96231b3b80d8
* add a noteChris Lattner2007-02-09
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* Remove fixed itemNate Begeman2007-02-09
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* A relatively simple PPC optimization.Chris Lattner2007-01-31
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* Update some of the llvm in the readmeNate Begeman2007-01-29
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* move contents of PR587 to here.Chris Lattner2007-01-18
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* Rewrite the branch selector to be correct in the face of large functions.Chris Lattner2006-11-18
| | | | | | | | | | | | | | | | The algorithm it used before wasn't 100% correct, we now use an iterative expansion model. This fixes assembler errors when compiling 403.gcc with tail merging enabled. Change the way the branch selector works overall: Now, the isel generates PPC::BCC instructions (as it used to) directly, and these BCC instructions are emitted to the output or jitted directly if branches don't need expansion. Only if branches need expansion are instructions rewritten and created. This should make branch select faster, and eliminates the Bxx instructions from the .td file. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31837 91177308-0d34-0410-b5e6-96231b3b80d8
* add note about ugly codegen with preincChris Lattner2006-11-10
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* add a note from viterbiChris Lattner2006-11-07
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* this doesn't occur any more in masonChris Lattner2006-10-27
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* the code in question is now:Chris Lattner2006-10-27
| | | | | | | | | | | | | cmpw cr0, r7, r3 ble cr0, LBB1_5 ;bb25 LBB1_8: ;bb17 cmpw cr0, r8, r5 bgt cr0, LBB1_2 ;bb which is just as good as crnand. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31235 91177308-0d34-0410-b5e6-96231b3b80d8
* add noteChris Lattner2006-10-13
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* Fold AND and ROTL more oftenNate Begeman2006-09-22
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* item doneChris Lattner2006-09-20
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* This is already doneChris Lattner2006-09-20
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* Two improvements:Chris Lattner2006-09-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. Codegen this comparison: if (X == 0x8000) as: cmplwi cr0, r3, 32768 bne cr0, LBB1_2 ;cond_next instead of: lis r2, 0 ori r2, r2, 32768 cmpw cr0, r3, r2 bne cr0, LBB1_2 ;cond_next 2. Codegen this comparison: if (X == 0x12345678) as: xoris r2, r3, 4660 cmplwi cr0, r2, 22136 bne cr0, LBB1_2 ;cond_next instead of: lis r2, 4660 ori r2, r2, 22136 cmpw cr0, r3, r2 bne cr0, LBB1_2 ;cond_next git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30509 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a note that we should match rlwnm betterChris Lattner2006-09-20
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* add a noteChris Lattner2006-09-14
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* Add a noteChris Lattner2006-07-14
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* Implement Regression/CodeGen/PowerPC/bswap-load-store.ll by folding bswapsChris Lattner2006-07-10
| | | | | | | into i16/i32 load/stores. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29089 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a note about a noteChris Lattner2006-05-17
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* Yet more readme updatingNate Begeman2006-05-08
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* New note about something bad happening in target independent optimizersNate Begeman2006-05-08
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* Proving once again that I am not as smart as the compilerNate Begeman2006-05-08
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* Fold more shifts into inserts, and update the READMENate Begeman2006-05-08
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* Update some stuff now that the new rlwimi code has gone inNate Begeman2006-05-08
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* New note, Nate, please check to see if I'm full of it :)Chris Lattner2006-05-05
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* add a note, move an altivec todo to the altivec list.Chris Lattner2006-04-13
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* add a noteChris Lattner2006-04-02
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* Split out altivec notes into their own READMEChris Lattner2006-03-27
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* #include Intrinsics.h into all dag iselsChris Lattner2006-03-25
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* add another noteChris Lattner2006-03-24
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* add a noteChris Lattner2006-03-23
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* This has been implemented. Tweak it into another noteChris Lattner2006-03-22
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* Update readmeNate Begeman2006-03-21
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* minor noteChris Lattner2006-03-21
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* Add a note about the MUL -> FMADD vector bug.Chris Lattner2006-03-19
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* notesChris Lattner2006-03-19
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* Remove BRTWOWAY*Nate Begeman2006-03-17
| | | | | | | | | 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
* Notes on how to kill the eeevil brtwoway, and make ppc branch selectorNate Begeman2006-03-16
| | | | | | | 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
* add a noteChris Lattner2006-03-16
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* Another case we could do better on.Nate Begeman2006-03-16
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* add a noteChris Lattner2006-03-08
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* add a noteChris Lattner2006-03-07
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* add a noteChris Lattner2006-03-01
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* Compile this:Chris Lattner2006-03-01
| | | | | | | | | | | | | | | | | | | | | | | | | | 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
* Use a target-specific dag-combine to implement CodeGen/PowerPC/fp-int-fp.ll.Chris Lattner2006-03-01
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* remove implemented itemChris Lattner2006-02-28
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