aboutsummaryrefslogtreecommitdiffstats
path: root/lib/Target/X86/README.txt
Commit message (Collapse)AuthorAgeFilesLines
* Remove a fixed item, update a couple partially-fixed items.Eli Friedman2010-06-031-81/+22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105375 91177308-0d34-0410-b5e6-96231b3b80d8
* This is now done.Dan Gohman2010-03-011-5/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97450 91177308-0d34-0410-b5e6-96231b3b80d8
* A few missed optimizations; the last one could have a significant impact onEli Friedman2010-02-101-0/+66
| | | | | | | | code with lots of bitfields. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95809 91177308-0d34-0410-b5e6-96231b3b80d8
* this is an SSE-specific issue.Chris Lattner2010-01-131-20/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93373 91177308-0d34-0410-b5e6-96231b3b80d8
* X86 if conversion + tail merging issues from PR6032.Chris Lattner2010-01-131-0/+20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93372 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove some README.txt entries which are now implemented.Dan Gohman2010-01-041-80/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92511 91177308-0d34-0410-b5e6-96231b3b80d8
* A couple minor README updates.Eli Friedman2009-12-211-14/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91823 91177308-0d34-0410-b5e6-96231b3b80d8
* Move and clarify note.Bill Wendling2009-10-271-31/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85334 91177308-0d34-0410-b5e6-96231b3b80d8
* Note corrected.Bill Wendling2009-10-271-3/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85332 91177308-0d34-0410-b5e6-96231b3b80d8
* Modify note.Bill Wendling2009-10-271-0/+8
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85331 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a note.Bill Wendling2009-10-271-0/+23
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85329 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a note.Evan Cheng2009-07-301-0/+20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77584 91177308-0d34-0410-b5e6-96231b3b80d8
* remove a bogus note.Chris Lattner2009-06-301-20/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74509 91177308-0d34-0410-b5e6-96231b3b80d8
* add a noteChris Lattner2009-06-301-0/+20
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74508 91177308-0d34-0410-b5e6-96231b3b80d8
* another xform that is target-independent (should be done in instcombine).Chris Lattner2009-06-161-3/+23
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73472 91177308-0d34-0410-b5e6-96231b3b80d8
* I think instcombine should unconditionally do this xform.Chris Lattner2009-06-161-2/+17
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73471 91177308-0d34-0410-b5e6-96231b3b80d8
* Misc x86 README updates: remove a couple of already-fixed issues, Eli Friedman2009-06-111-57/+57
| | | | | | | | add a few suggestions from looking at some assembly code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73210 91177308-0d34-0410-b5e6-96231b3b80d8
* add some late optimizations that GCC does. It thinks these are a winChris Lattner2009-05-251-0/+14
| | | | | | | even on Core2, not just AMD processors which was a surprise to me. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72396 91177308-0d34-0410-b5e6-96231b3b80d8
* we should eventually add -march=atom and the new atom movbe instruction.Chris Lattner2009-05-251-0/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72387 91177308-0d34-0410-b5e6-96231b3b80d8
* Move 3 "(add (select cc, 0, c), x) -> (select cc, x, (add, x, c))"Chris Lattner2009-03-121-22/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | related transformations out of target-specific dag combine into the ARM backend. These were added by Evan in r37685 with no testcases and only seems to help ARM (e.g. test/CodeGen/ARM/select_xform.ll). Add some simple X86-specific (for now) DAG combines that turn things like cond ? 8 : 0 -> (zext(cond) << 3). This happens frequently with the recently added cp constant select optimization, but is a very general xform. For example, we now compile the second example in const-select.ll to: _test: movsd LCPI2_0, %xmm0 ucomisd 8(%esp), %xmm0 seta %al movzbl %al, %eax movl 4(%esp), %ecx movsbl (%ecx,%eax,4), %eax ret instead of: _test: movl 4(%esp), %eax leal 4(%eax), %ecx movsd LCPI2_0, %xmm0 ucomisd 8(%esp), %xmm0 cmovbe %eax, %ecx movsbl (%ecx), %eax ret This passes multisource and dejagnu. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66779 91177308-0d34-0410-b5e6-96231b3b80d8
* Add more information to the EFLAGS note.Dan Gohman2009-03-101-4/+12
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66515 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a note about EFLAGS optimization.Dan Gohman2009-03-091-0/+15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66508 91177308-0d34-0410-b5e6-96231b3b80d8
* add a note.Chris Lattner2009-03-081-0/+40
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66360 91177308-0d34-0410-b5e6-96231b3b80d8
* add a note.Chris Lattner2009-03-081-0/+22
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66359 91177308-0d34-0410-b5e6-96231b3b80d8
* add a horrible noteChris Lattner2009-02-171-0/+41
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64719 91177308-0d34-0410-b5e6-96231b3b80d8
* MachineLICM now handles these cases.Dan Gohman2009-02-151-85/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64620 91177308-0d34-0410-b5e6-96231b3b80d8
* add a note.Chris Lattner2009-02-081-0/+31
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64093 91177308-0d34-0410-b5e6-96231b3b80d8
* add a note Chris Lattner2008-12-061-0/+15
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60632 91177308-0d34-0410-b5e6-96231b3b80d8
* A couple small cleanups, plus a new potential optimization.Eli Friedman2008-11-301-3/+29
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60286 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a README entry.Evan Cheng2008-11-111-0/+17
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59052 91177308-0d34-0410-b5e6-96231b3b80d8
* move the note to the correct READMETorok Edwin2008-10-241-0/+97
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58104 91177308-0d34-0410-b5e6-96231b3b80d8
* This is done.Dan Gohman2008-10-171-10/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57733 91177308-0d34-0410-b5e6-96231b3b80d8
* This is done.Evan Cheng2008-08-261-21/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55348 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove unnecessary readme entryNate Begeman2008-07-171-9/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53722 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a note about a potential PIC optimization.Dan Gohman2008-06-241-0/+7
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52663 91177308-0d34-0410-b5e6-96231b3b80d8
* add a micro optzn.Chris Lattner2008-05-051-0/+18
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50681 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an ugly note.Chris Lattner2008-04-211-0/+35
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50029 91177308-0d34-0410-b5e6-96231b3b80d8
* New entry.Evan Cheng2008-03-281-0/+44
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48912 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove duplicated entries.Evan Cheng2008-03-231-35/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48714 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix X86's isTruncateFree to not claim that truncate to i1 is free. This ↵Christopher Lamb2008-03-191-44/+0
| | | | | | fixes Bill's testcase that failed for r48491. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48542 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an issue that is preventing instcombine from doing a simplification.Chris Lattner2008-03-141-5/+43
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48356 91177308-0d34-0410-b5e6-96231b3b80d8
* move these to the appropriate fileChris Lattner2008-03-081-45/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48054 91177308-0d34-0410-b5e6-96231b3b80d8
* some more spelling changesGabor Greif2008-03-061-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47996 91177308-0d34-0410-b5e6-96231b3b80d8
* Evan implemented these.Chris Lattner2008-03-021-27/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47828 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a random not very important noteChris Lattner2008-02-281-0/+38
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47704 91177308-0d34-0410-b5e6-96231b3b80d8
* A few more small things I've run into.Eli Friedman2008-02-281-3/+86
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47702 91177308-0d34-0410-b5e6-96231b3b80d8
* This is done.Evan Cheng2008-02-271-24/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47688 91177308-0d34-0410-b5e6-96231b3b80d8
* A few minor updates, removing implemented stuff and adding a couple of Eli Friedman2008-02-211-83/+110
| | | | | | | | new things. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47458 91177308-0d34-0410-b5e6-96231b3b80d8
* Dan implemented one multiply issue. Replace it with another. :)Chris Lattner2008-02-211-12/+33
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47431 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a note about sext from i1 plus flags use.Chris Lattner2008-02-181-0/+52
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47278 91177308-0d34-0410-b5e6-96231b3b80d8
generated by cgit v1.1 at 2025-01-27 11:54:24 +0000