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4522 Commits

Author SHA1 Message Date
Evan Cheng d885f6e139 Combine (fcmp cc0 x, y) | (fcmp cc1 x, y) into a single fcmp when possible. 
llvm-svn: 57515
 2008-10-14 18:44:08 +00:00
Evan Cheng ce70752b11 - Somehow I forgot about one / une. 
- Renumber fcmp predicates to match their icmp counterparts.
- Try swapping operands to expose more optimization opportunities.

llvm-svn: 57513
 2008-10-14 18:13:38 +00:00
Evan Cheng 67786cce66 Optimize anding of two fcmp into a single fcmp if the operands are the same. e.g. uno && ueq -> ueq 
ord && olt -> olt
     ord && ueq -> oeq

llvm-svn: 57507
 2008-10-14 17:15:11 +00:00
Matthijs Kooijman f7d3cb5435 Make InstructionCombining::getBitCastOperand() recognize GEP instructions and 
constant expression with all zero indices as being the same as a bitcast.

llvm-svn: 57442
 2008-10-13 15:17:01 +00:00
Chris Lattner da435910e8 Fix PR2697 by rewriting the '(X / pos) op neg' logic. This also changes 
a couple other cases for clarity, but shouldn't affect correctness.

Patch by Eli Friedman!

llvm-svn: 57387
 2008-10-11 22:55:00 +00:00
Devang Patel 647a1e532b Check loop exit predicate properly while eliminating one iteration loop. 
This patch fixes PR 2869

llvm-svn: 57369
 2008-10-10 22:02:57 +00:00
Nuno Lopes e3127f3f80 fix memleak by cleaning the global sets on pass exit 
llvm-svn: 57353
 2008-10-10 16:25:50 +00:00
Dale Johannesen 4f0bd68cfe Add a "loses information" return value to APFloat::convert 
and APFloat::convertToInteger.  Restore return value to
IEEE754.  Adjust all users accordingly.

llvm-svn: 57329
 2008-10-09 23:00:39 +00:00
Nick Lewycky 03c5fa18f1 Don't drop alignment on globals when cloning. 
llvm-svn: 57320
 2008-10-09 06:27:14 +00:00
Nuno Lopes 06c67f88d7 dont specialize weak functions and the like 
llvm-svn: 57305
 2008-10-08 18:45:59 +00:00
Duncan Sands 26ff6f9c54 Add <cstdio> include where needed by gcc-4.4. 
Patch by Samuel Tardieu.

llvm-svn: 57291
 2008-10-08 07:23:46 +00:00
Chris Lattner 42d5785dbd Add parentheses to avoid warnings in GCC 4.4.0, 
patch by Samuel Tardieu!

llvm-svn: 57288
 2008-10-08 06:42:28 +00:00
Andrew Lenharth 5aa1cc4065 Correctly set attributes when removing args during cloning. Fixes PR2765 
llvm-svn: 57254
 2008-10-07 18:08:38 +00:00
Devang Patel 40aafce00d Fix typo, fix PR 2865. 
llvm-svn: 57221
 2008-10-06 23:22:54 +00:00
Matthijs Kooijman cbe5e16eb5 Allow scalarrepl to treat an all-zero GEP just as bitcast. 
This includes not marking a GEP involving a vector as unsafe, but only when it
has all zero indices. This allows scalarrepl to work in a few more cases.

llvm-svn: 57177
 2008-10-06 16:23:31 +00:00
Chris Lattner 917a6c1343 rewrite bswap matching to be more general, allowing arbitrary 
shifting and masking inside a bswap expr.  This allows it to handle
the cases from PR2842, which involve the intermediate 'or' 
expressions being shifted, not just the input value.

llvm-svn: 57095
 2008-10-05 02:13:19 +00:00
Chris Lattner ca91f265c4 fix a bug where the bswap matcher could match a case involving 
ashr.  It should only apply to lshr.

llvm-svn: 57089
 2008-10-05 00:50:57 +00:00
Duncan Sands 1d35e9aebe Ignore loads from and stores to local memory (i.e. allocas) 
when deciding whether to mark a function readnone/readonly.
Since the pass is currently run before SROA, this may be
quite helpful.  Requested by Chris on IRC.

llvm-svn: 57050
 2008-10-04 13:24:24 +00:00
Dan Gohman e21903987f Clean up some multiple-return-value code that is no longer 
applicable.

llvm-svn: 57033
 2008-10-03 22:21:24 +00:00
Devang Patel f963403b58 Nick Lewycky's patch. 
While hosting instruction check PHI node.

llvm-svn: 57025
 2008-10-03 18:57:37 +00:00
Duncan Sands 3a813a5d3f Teach internalize to preserve the callgraph. 
Why?  Because it was there!

llvm-svn: 56996
 2008-10-03 07:36:09 +00:00
Owen Anderson cb4f156b6b SplitBlock should only attempt to update LoopInfo if it is actually being used. 
llvm-svn: 56994
 2008-10-03 06:55:35 +00:00
Duncan Sands d65a4daeea Factorize code: remove variants of "strip off 
pointer bitcasts and GEP's", and centralize the
logic in Value::getUnderlyingObject.  The
difference with stripPointerCasts is that
stripPointerCasts only strips GEPs if all
indices are zero, while getUnderlyingObject
strips GEPs no matter what the indices are.

llvm-svn: 56922
 2008-10-01 15:25:41 +00:00
Nuno Lopes 96740aad86 revert the addition of Preverves(CallGraph), per Duncan's comments 
llvm-svn: 56917
 2008-10-01 09:13:40 +00:00
Dan Gohman 67d90de2b0 Call ScalarEvolution's deleteValueFromRecords before deleting an 
instruction, not after. This fixes some uses of free'd memory.

llvm-svn: 56908
 2008-10-01 02:02:03 +00:00
Nuno Lopes 5093ab4c76 add preserversCFG() + preservers(CallGraph) 
llvm-svn: 56887
 2008-09-30 22:04:30 +00:00
Nuno Lopes 2bd7b24f1a add AU.setPreservesCFG() since this pass only adds and removes function attributes 
llvm-svn: 56868
 2008-09-30 18:34:38 +00:00
Nick Lewycky e8ced3ec19 Fix misoptimization of: xor i1 (icmp eq (X, C1), icmp s[lg]t (X, C2)) 
llvm-svn: 56834
 2008-09-30 06:08:34 +00:00
Duncan Sands 57512a1be4 Speed up these passes when the callgraph has 
huge simply connected components.  Suggested
by Chris.

llvm-svn: 56787
 2008-09-29 14:59:04 +00:00
Nuno Lopes ffc9da6772 remove redundant test (mayBeOverriden() includes hasLinkOnceLinkage) 
llvm-svn: 56786
 2008-09-29 14:40:32 +00:00
Duncan Sands e340e18783 Tweak some comments. 
llvm-svn: 56784
 2008-09-29 13:35:31 +00:00
Duncan Sands 08d91178e9 Rename isWeakForLinker to mayBeOverridden. Use it 
instead of hasWeakLinkage in a bunch of optimization
passes.

llvm-svn: 56782
 2008-09-29 11:25:42 +00:00
Devang Patel 9eb525d4f9 Implement function notes as function attributes. 
llvm-svn: 56716
 2008-09-26 23:51:19 +00:00
Devang Patel a05633e105 Now Attributes are divided in three groups 
- return attributes - inreg, zext and sext
- parameter attributes
- function attributes - nounwind, readonly, readnone, noreturn

Return attributes use 0 as the index.
Function attributes use ~0U as the index.

This patch requires corresponding changes in llvm-gcc and clang.

llvm-svn: 56704
 2008-09-26 22:53:05 +00:00
Devang Patel 4c758ea3e0 Large mechanical patch. 
s/ParamAttr/Attribute/g
s/PAList/AttrList/g
s/FnAttributeWithIndex/AttributeWithIndex/g
s/FnAttr/Attribute/g

This sets the stage 
- to implement function notes as function attributes and 
- to distinguish between function attributes and return value attributes.

This requires corresponding changes in llvm-gcc and clang.

llvm-svn: 56622
 2008-09-25 21:00:45 +00:00
Evan Cheng 25dd4a2daf Commit CodeGenPrepare.cpp changes which was accidentially left out of 56526. 
llvm-svn: 56549
 2008-09-24 06:48:55 +00:00
Eric Christopher c1ea149dcd Fix fallout in CodeGenPrepare from 56526. Will likely need more work. 
llvm-svn: 56546
 2008-09-24 05:32:41 +00:00
Devang Patel 6402c7236f s/ParamAttrsWithIndex/FnAttributeWithIndex/g 
llvm-svn: 56535
 2008-09-24 00:55:02 +00:00
Devang Patel e15607b7bb Put FN_NOTE_AlwaysInline and others in FnAttr namespace. 
llvm-svn: 56527
 2008-09-24 00:06:15 +00:00
Devang Patel e87abd26ba Move FN_NOTE_AlwaysInline and other out of ParamAttrs namespace. 
Do not check isDeclaration() in hasNote(). It is clients' responsibility.

llvm-svn: 56524
 2008-09-23 23:52:03 +00:00
Devang Patel ba3fa6c6e1 s/ParameterAttributes/Attributes/g 
llvm-svn: 56513
 2008-09-23 23:03:40 +00:00
Devang Patel 82fed6702b Use parameter attribute store (soon to be renamed) for 
Function Notes also. Function notes are stored at index ~0.

llvm-svn: 56511
 2008-09-23 22:35:17 +00:00
Devang Patel 329fe728b5 Add hasNote() to check note associated with a function. 
llvm-svn: 56477
 2008-09-22 22:32:29 +00:00
Oscar Fuentes a229b3c9a7 Initial support for the CMake build system. 
llvm-svn: 56419
 2008-09-22 01:08:49 +00:00
Duncan Sands e1dc84be64 Implement review feedback from Devang: make use 
of mayReadFromMemory and mayWriteToMemory.

llvm-svn: 56387
 2008-09-20 16:45:58 +00:00
Duncan Sands 310077034a Remove the MarkModRef pass (use AddReadAttrs instead). 
Unfortunately this means removing one regression test
of GlobalsModRef because I couldn't work out how to
perform it without MarkModRef.

llvm-svn: 56342
 2008-09-19 08:23:44 +00:00
Duncan Sands af25ee7ffc Add a new pass AddReadAttrs which works out which functions 
can get the readnone/readonly attributes, and gives them it.
The plan is to remove markmodref (which did the same thing
by querying GlobalsModRef) and delete the analogous
functionality from GlobalsModRef.

llvm-svn: 56341
 2008-09-19 08:17:05 +00:00
Devang Patel c25be3b2de splitLoop does not handle split condition EQ. 
Fixes PR 2805

llvm-svn: 56321
 2008-09-18 23:45:14 +00:00
Bill Wendling a00fa322b1 Decrementing the iterator here could be wrong if the worklist is empty after the "erase". 
Thanks to Ji Young Park for the patch!

llvm-svn: 56316
 2008-09-18 23:04:18 +00:00
Devang Patel 76b22c1420 Try to place hoisted instructions befoe icmp instruction. 
llvm-svn: 56315
 2008-09-18 22:50:42 +00:00