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path: root/lib/Target/PowerPC/README.txt
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2013-03-27Remove "gpr0 allocation" from the PPC README TODO listHal Finkel
As Chris pointed out, post r178123, this is now done! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178165 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-08Remove the TODO statement in the PPC README re: CTR loopsHal Finkel
As Chris points out, this can now be removed! TODO: check if the associated section on viterbi's inner loop can also be removed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158224 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-23Renaming ISD::BIT_CONVERT to ISD::BITCAST to better reflect the LLVM IR concept.Wesley Peck
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119990 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-19add a readme.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114303 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-02Floating-point add, sub, and mul are now spelled fadd, fsub, and fmul,Dan Gohman
respectively. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97531 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-12Add the problem I just hacked around in 96015/96020.Dale Johannesen
The solution there produces correct code, but is seriously deficient in several ways. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96039 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-24move PR5945 here.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94350 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-24change the canonical form of "cond ? -1 : 0" to be Chris Lattner
"sext cond" instead of a select. This simplifies some instcombine code, matches the policy for zext (cond ? 1 : 0 -> zext), and allows us to generate better code for a testcase on ppc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94339 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-23add a noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94317 91177308-0d34-0410-b5e6-96231b3b80d8
2010-01-07constant materialization could be improved.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92921 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-24Remove the IA-64 backend.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76920 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-02clarify: stub emission depends on the version of the linker you use, it has ↵Chris Lattner
nothing to do with the target. Also, the stub elimination optimization *requires* making the stub explicit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74682 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-01Add darwin stub removal to wishlist.Dale Johannesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74667 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-17Move some former testcases (low-probability codegenDale Johannesen
optimizations) into this wishlist. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59455 91177308-0d34-0410-b5e6-96231b3b80d8
2008-08-11Implement ISD::TRAP support on PPCNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54644 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-02add a noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47830 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-02Evan implemented this.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47827 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-11additional missing featureNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46948 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-15If someone wants to implement ppc TRAP, they can go for it :)Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46019 91177308-0d34-0410-b5e6-96231b3b80d8
2008-01-08Finally implement correct ordered comparisons for PPC, even thoughChris Lattner
the code generated is not wonderful. This turns a miscompilation into a code quality bug (noted in the ppc readme). This fixes PR642, which is over 2 years old (!). Nate, please review this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45742 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-08implement __builtin_return_addr(0) on ppc.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44700 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-10Add some notes about better flag handling.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41808 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-23new exampleChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41318 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-31add a noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35530 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-25add a noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35334 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-25add a noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35330 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-09add a noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34101 91177308-0d34-0410-b5e6-96231b3b80d8
2007-02-09Remove fixed itemNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34081 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-31A relatively simple PPC optimization.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33709 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-29Update some of the llvm in the readmeNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33630 91177308-0d34-0410-b5e6-96231b3b80d8
2007-01-18move contents of PR587 to here.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33333 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-18Rewrite the branch selector to be correct in the face of large functions.Chris Lattner
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
2006-11-10add note about ugly codegen with preincChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31617 91177308-0d34-0410-b5e6-96231b3b80d8
2006-11-07add a note from viterbiChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31506 91177308-0d34-0410-b5e6-96231b3b80d8
2006-10-27this doesn't occur any more in masonChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31236 91177308-0d34-0410-b5e6-96231b3b80d8
2006-10-27the code in question is now:Chris Lattner
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
2006-10-13add noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30937 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-22Fold AND and ROTL more oftenNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30577 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20item doneChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30518 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20This is already doneChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30512 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-20Two improvements:Chris Lattner
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
2006-09-20Add a note that we should match rlwnm betterChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30508 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-14add a noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30377 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-14Add a noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29139 91177308-0d34-0410-b5e6-96231b3b80d8
2006-07-10Implement Regression/CodeGen/PowerPC/bswap-load-store.ll by folding bswapsChris Lattner
into i16/i32 load/stores. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29089 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-17Add a note about a noteChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28355 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-08Yet more readme updatingNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28172 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-08New note about something bad happening in target independent optimizersNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28170 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-08Proving once again that I am not as smart as the compilerNate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28169 91177308-0d34-0410-b5e6-96231b3b80d8
2006-05-08Fold more shifts into inserts, and update the READMENate Begeman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28168 91177308-0d34-0410-b5e6-96231b3b80d8
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