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317 Commits

Author SHA1 Message Date
Chris Lattner
eb3da2ab86 remove an xform subsumed by EvaluateInDifferentType. 
llvm-svn: 93095
 2010-01-10 01:35:55 +00:00
Chris Lattner
edb60f0861 clean up this xform by using m_Trunc. 
llvm-svn: 93092
 2010-01-10 01:04:31 +00:00
Chris Lattner
3efde81a44 inline and remove the rest of commonIntCastTransforms. 
llvm-svn: 93091
 2010-01-10 01:00:46 +00:00
Chris Lattner
492e9ca5a4 Inline the expression type promotion/demotion stuff out of 
commonIntCastTransforms into the callers, eliminating a switch,
and allowing the static predicate  methods to be moved down to
live next to the corresponding function.  No functionality 
change.

llvm-svn: 93089
 2010-01-10 00:58:42 +00:00
Eric Christopher
937778e8d0 Remove unnecessary dyn_cast and add a comment. Part of a WIP. 
llvm-svn: 93026
 2010-01-08 21:37:11 +00:00
Chris Lattner
fd117b63f7 mplement a theoretical fixme. 
llvm-svn: 93024
 2010-01-08 19:28:47 +00:00
Chris Lattner
474cd30fb7 rename CanEvaluateInDifferentType -> CanEvaluateTruncated and 
simplify it now that it is only used for truncates.

llvm-svn: 93021
 2010-01-08 19:19:23 +00:00
Chris Lattner
05ae88cc8f teach instcombine to delete sign extending shift pairs (sra(shl X, C), C) when 
the input is already sign extended.

llvm-svn: 93019
 2010-01-08 19:04:21 +00:00
Chris Lattner
725b9ba4e5 tidy up some stuff duncan pointed out. 
llvm-svn: 93007
 2010-01-08 17:48:19 +00:00
Chris Lattner
944f9c4ac1 teach ComputeNumSignBits to look through PHI nodes. 
llvm-svn: 92964
 2010-01-07 23:44:37 +00:00
Chris Lattner
db8fa82914 Enhance instcombine to reason more strongly about promoting computation 
that feeds into a zext, similar to the patch I did yesterday for sext.
There is a lot of room for extension beyond this patch.

llvm-svn: 92962
 2010-01-07 23:41:00 +00:00
Eric Christopher
0574ce70c3 Move the object size intrinsic optimization to inst-combine and make 
it work for any integer size return type.

llvm-svn: 92853
 2010-01-06 20:04:44 +00:00
Chris Lattner
0f611954b6 tweaks suggested by Duncan 
llvm-svn: 92824
 2010-01-06 05:32:15 +00:00
Chris Lattner
0b73344d8a Teach instcombine's sext elimination logic to be more aggressive. 
Previously, instcombine would only promote an expression tree to
the larger type if doing so eliminated two casts.  This is because
a need to manually do the sign extend after the promoted expression
tree with two shifts.  Now, we keep track of whether the result of
the computation is going to be properly sign extended already.  If
so, we can unconditionally promote the expression, which allows us
to zap more sext's.

This implements rdar://6598839 (aka gcc pr38751)

llvm-svn: 92815
 2010-01-06 01:56:21 +00:00
Chris Lattner
7bf6842c49 simplify this code. 
llvm-svn: 92800
 2010-01-05 23:00:30 +00:00
Chris Lattner
a101affbdb make this a static function instead of a method. 
llvm-svn: 92795
 2010-01-05 22:30:42 +00:00
Chris Lattner
53b9ed70ee more rearrangement and cleanup, fix my test failure. 
llvm-svn: 92792
 2010-01-05 22:21:18 +00:00
Chris Lattner
45cd7ba394 cleanup 
llvm-svn: 92790
 2010-01-05 22:07:33 +00:00
Chris Lattner
2f69f6a822 remove two trunc xforms that are subsumed by EvaluateInDifferentType. 
The only difference is that EvaluateInDifferentType checks to ensure
they are profitable before doing them :)

llvm-svn: 92788
 2010-01-05 22:01:41 +00:00
Chris Lattner
13293b9738 just remove this xform which is subsumed by others. 
llvm-svn: 92775
 2010-01-05 21:16:30 +00:00
Chris Lattner
3aac94341a move a trunc-specific transform out of commonIntCastTransforms into visitTrunc. 
llvm-svn: 92773
 2010-01-05 21:11:17 +00:00
Benjamin Kramer
0ba7479f2c Move remaining stuff to the isInteger predicate. 
llvm-svn: 92771
 2010-01-05 21:05:54 +00:00
Chris Lattner
18ed3a6976 move a zext specific xform out of commonIntCastTransforms into visitZExt and modernize it. 
llvm-svn: 92770
 2010-01-05 21:04:47 +00:00
Chris Lattner
4c21bfec50 move a trunc-specific xform out of commonIntCastTransforms into visitTrunc 
llvm-svn: 92768
 2010-01-05 20:57:30 +00:00
Chris Lattner
e293a03aff reduce indentation 
llvm-svn: 92766
 2010-01-05 20:56:24 +00:00
Benjamin Kramer
c233521d45 Convert a ton of simple integer type equality tests to the new predicate. 
llvm-svn: 92760
 2010-01-05 20:07:06 +00:00
Chris Lattner
f457542506 optimize comparisons against cttz/ctlz/ctpop, patch by Alastair Lynn! 
llvm-svn: 92745
 2010-01-05 18:09:56 +00:00
Dan Gohman
e4a22bdd4a Use do+while instead of while for loops which obviously have a 
non-zero trip count. Use SmallVector's pop_back_val().

llvm-svn: 92734
 2010-01-05 16:27:25 +00:00
Benjamin Kramer
cd6b749245 Add newline at EOF. 
llvm-svn: 92727
 2010-01-05 13:32:48 +00:00
Benjamin Kramer
e90a3c66c4 Avoid going through the LLVMContext for type equality where it's safe to dereference the type pointer. 
llvm-svn: 92726
 2010-01-05 13:12:22 +00:00
Chris Lattner
09b91ecf3c prune some #includes. 
llvm-svn: 92712
 2010-01-05 07:54:43 +00:00
Chris Lattner
58ddbda58c split and/or/xor out into one overly-large (2000LOC) file. However, I think 
it does make sense to keep them together, at least for now.

llvm-svn: 92711
 2010-01-05 07:50:36 +00:00
Chris Lattner
7201f09ff2 missed file with previous commit. 
llvm-svn: 92710
 2010-01-05 07:45:02 +00:00
Chris Lattner
dd39b601af split instcombine of shifts out to its own file. 
llvm-svn: 92709
 2010-01-05 07:44:46 +00:00
Chris Lattner
e75f48f8bd eliminate getBitCastOperand and simplify some over-complex inbounds stuff. 
llvm-svn: 92708
 2010-01-05 07:42:10 +00:00
Chris Lattner
e21194fe22 split call handling out to InstCombineCalls.cpp 
llvm-svn: 92707
 2010-01-05 07:32:13 +00:00
Chris Lattner
491e03b6ef optimize cttz and ctlz when we can prove something about the 
leading/trailing bits.  Patch by Alastair Lynn!

llvm-svn: 92706
 2010-01-05 07:23:56 +00:00
Chris Lattner
e36e3b586d this inline function moved to addsub 
llvm-svn: 92705
 2010-01-05 07:20:54 +00:00
Chris Lattner
63747a10a8 split add/sub out to its own file. Eliminate use of 
dyn_castNotVal in the X+~X transform.  dyn_castNotVal is
dramatic overkill for what the xform needed.

llvm-svn: 92704
 2010-01-05 07:18:46 +00:00
Chris Lattner
5ea00f56bd all the places we use hasOneUse() we know are instructions, so inline 
and simplify.

llvm-svn: 92700
 2010-01-05 07:04:23 +00:00
Chris Lattner
081decf118 eliminate AssociativeOpt and its last uses. 
llvm-svn: 92697
 2010-01-05 07:01:16 +00:00
Chris Lattner
4d773ac576 inline the FoldICmpLogical functor. 
llvm-svn: 92695
 2010-01-05 06:59:49 +00:00
Chris Lattner
1e57d0e7e3 inline the 'AddRHS' transformation, simplifying things significantly. 
Eliminate the 'AddMaskingAnd' transformation, it is redundant with this
more general code right below it:
  // A+B --> A|B iff A and B have no bits set in common.

llvm-svn: 92693
 2010-01-05 06:29:13 +00:00
Chris Lattner
17a2db8444 remove massive over-genality manifested as a big template 
that got instantiated.  There is no reason for instcombine
to try this hard for simple associative optimizations.  Next
up, eliminate the template completely.

llvm-svn: 92692
 2010-01-05 06:24:06 +00:00
Chris Lattner
92f9d59ad1 split mul/div/rem instructions out to their own file. 
llvm-svn: 92689
 2010-01-05 06:09:35 +00:00
Chris Lattner
8822b80a65 clean up header. 
llvm-svn: 92688
 2010-01-05 06:05:07 +00:00
Chris Lattner
e4910dc145 split select out to its own file. 
llvm-svn: 92687
 2010-01-05 06:03:12 +00:00
Chris Lattner
b55724e825 split out load/store/alloca. 
llvm-svn: 92685
 2010-01-05 05:57:49 +00:00
Chris Lattner
916d97c2d5 reduce indentation 
llvm-svn: 92684
 2010-01-05 05:42:08 +00:00
Chris Lattner
e22030e730 split vector stuff out to InstCombineVectorOps.cpp 
llvm-svn: 92683
 2010-01-05 05:36:20 +00:00
Chris Lattner
23ff3ce8eb split PHI node stuff out to InstCombinePHI.cpp 
llvm-svn: 92682
 2010-01-05 05:31:55 +00:00
Chris Lattner
48618eeec3 convert various IntrinsicInst's to use class instead of struct. 
llvm-svn: 92681
 2010-01-05 05:21:26 +00:00
Devang Patel
3b08c33f33 Remove dead debug info intrinsics. 
Intrinsic::dbg_stoppoint
 Intrinsic::dbg_region_start 
 Intrinsic::dbg_region_end 
 Intrinsic::dbg_func_start
AutoUpgrade simply ignores these intrinsics now.

llvm-svn: 92557
 2010-01-05 01:10:40 +00:00
Daniel Dunbar
1fb9148421 Fix some struct/class specifier mismatches. 
llvm-svn: 92550
 2010-01-05 00:15:58 +00:00
Chris Lattner
3b060b2d41 Truncate GEP indexes larger than the pointer size down to pointer size 
when doing this transform if the GEP is not inbounds.  No testcase because
it is very difficult to trigger this: instcombine already canonicalizes
GEP indices to pointer size, so it relies specific permutations of the
instcombine worklist.

Thanks to Duncan for pointing this possible problem out.

llvm-svn: 92495
 2010-01-04 18:57:15 +00:00
Chris Lattner
8304a93ff4 silence a bogus 'might be used uninit' warning from GCC. 
llvm-svn: 92494
 2010-01-04 18:48:26 +00:00
Chris Lattner
e19878577c move some more cast-related stuff 
llvm-svn: 92471
 2010-01-04 07:59:07 +00:00
Chris Lattner
f9920fbac9 move the [Can]EvaluateInDifferentType functions out to InstCombineCasts.cpp 
llvm-svn: 92469
 2010-01-04 07:54:59 +00:00
Chris Lattner
7a5037baf5 split 943 lines of instcombine out to a new InstCombineCasts.cpp 
file.  InstructionCombining.cpp is now down to a svelte 9300 lines :)

llvm-svn: 92468
 2010-01-04 07:53:58 +00:00
Chris Lattner
fed736376e split instcombine of compares (visit[FI]Cmp) out to 
a new InstCombineCompares.cpp file.

llvm-svn: 92467
 2010-01-04 07:37:31 +00:00
Chris Lattner
176c21d33e update cmakefile 
llvm-svn: 92466
 2010-01-04 07:19:55 +00:00
Chris Lattner
fbcc4eb5a5 move the 'SimplifyDemandedFoo' methods out to their own file, cutting 1K lines out of instcombine.cpp 
llvm-svn: 92465
 2010-01-04 07:17:19 +00:00
Chris Lattner
cf0889fda3 split the instcombine class definition out to a header shared 
among the instcombine library.

llvm-svn: 92463
 2010-01-04 07:12:23 +00:00
Chris Lattner
cb0fe8a20b remove a ton of unneeded LLVMContext stuff. 
llvm-svn: 92462
 2010-01-04 07:02:48 +00:00
Chris Lattner
ec9a1ab1bb move InstCombineWorklist out to its own header. 
llvm-svn: 92461
 2010-01-04 06:30:00 +00:00
Chris Lattner
2e86be5607 forgot to svn add these. 
llvm-svn: 92460
 2010-01-04 06:28:20 +00:00
Chris Lattner
2d9948f5f1 move instcombine to its own library, it's past time. 
llvm-svn: 92459
 2010-01-04 06:23:24 +00:00