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4522 Commits

Author SHA1 Message Date
Devang Patel
7f9671ba37 Do not hoist instruction above branch condition. The instruction may use branch condition. 
llvm-svn: 56286
 2008-09-17 18:21:49 +00:00
Devang Patel
dca8d3b183 Do not ignore iv uses outside the loop. 
This one slipped through cracks very well.

llvm-svn: 56284
 2008-09-17 17:53:47 +00:00
Dan Gohman
dafa9c6e85 Improve instcombine's handling of integer min and max in two ways: 
- Recognize expressions like "x > -1 ? x : 0" as min/max and turn them
   into expressions like "x < 0 ? 0 : x", which is easily recognizable
   as a min/max operation.
 - Refrain from folding expression like "y/2 < 1" to "y < 2" when the
   comparison is being used as part of a min or max idiom, like
   "y/2 < 1 ? 1 : y/2". In that case, the division has another use, so
   folding doesn't eliminate it, and obfuscates the min/max, making it
   harder to recognize as a min/max operation.

These benefit ScalarEvolution, CodeGen, and anything else that wants to
recognize integer min and max.

llvm-svn: 56246
 2008-09-16 18:46:06 +00:00
Dan Gohman
68e7735a38 Teach LSR to optimize away SMAX operations for tripcounts in common 
cases.  See the comment above OptimizeSMax for the full story, and
the testcase for an example. This cancels out a pessimization
commonly attributed to indvars, and will allow us to lift some of
the artificial throttles in indvars, rather than add new ones.

llvm-svn: 56230
 2008-09-15 21:22:06 +00:00
Dan Gohman
eff71f2953 On 64-bit targets, change 32-bit getelementptr indices to be 64-bit 
getelementptr indices, inserting an explicit cast if necessary.
This helps expose the sign-extension operation to other optimizations.

llvm-svn: 56133
 2008-09-11 23:06:38 +00:00
Dan Gohman
7d01c0654c Fix a vectorshuffle instcombine bug introduced by r55995. 
Patch by Nicolas Capens!

llvm-svn: 56129
 2008-09-11 22:47:57 +00:00
Dan Gohman
9b9d547a5c Fix a copy+paste bug that Duncan spotted. For several 
cases it was still getting lucky and detecting overflow
but it was clearly incorrect.

llvm-svn: 56113
 2008-09-11 18:53:02 +00:00
Dan Gohman
9d9a4be588 In my analysis for r56076 I missed the case where the original 
multiplication overflows.

llvm-svn: 56082
 2008-09-11 00:25:00 +00:00
Dan Gohman
c1ae01688f Fix an icmp+sdiv optimization to check for and handle an overflow 
condition. This fixes PR2740.

llvm-svn: 56076
 2008-09-10 23:30:57 +00:00
Devang Patel
728c44ab56 fix white spaces. 
llvm-svn: 56056
 2008-09-10 14:49:55 +00:00
Dan Gohman
97f0a0f28d Fix a warning about comparing signed and unsigned values. 
llvm-svn: 56040
 2008-09-10 01:09:32 +00:00
Devang Patel
92b032f3e6 if loop induction variable is always sign or zero extended then 
extend the type of induction variable.

llvm-svn: 56017
 2008-09-09 21:41:07 +00:00
Devang Patel
92c5367705 fix overflow check. 
llvm-svn: 56011
 2008-09-09 20:54:34 +00:00
Anton Korobeynikov
1a1140429e Make safer variant of alias resolution routine to be default 
llvm-svn: 56005
 2008-09-09 20:05:04 +00:00
Anton Korobeynikov
a9b60ee0fc Resolve aliases, when possible 
llvm-svn: 56001
 2008-09-09 19:04:59 +00:00
Dan Gohman
86fb5b48de Make SimplifyDemandedVectorElts simplify vectors with multiple 
users, and teach it about shufflevector instructions.

Also, fix a subtle bug in SimplifyDemandedVectorElts'
insertelement code.

This is a patch that was originally written by Eli Friedman,
with some fixes and cleanup by me.

llvm-svn: 55995
 2008-09-09 18:11:14 +00:00
Devang Patel
0f7a3507cf Fix simplifycfg crash in handing block merge. 
llvm-svn: 55971
 2008-09-09 01:06:56 +00:00
Devang Patel
3d56051f70 s/RemoveUnreachableBlocks/RemoveUnreachableBlocksFromFn/g 
llvm-svn: 55965
 2008-09-08 22:14:17 +00:00
Devang Patel
7518f250b9 Remove unused counter. 
llvm-svn: 55924
 2008-09-08 17:14:54 +00:00
Devang Patel
538a7f479a Remove OptimizeIVType() 
llvm-svn: 55913
 2008-09-08 16:13:27 +00:00
Duncan Sands
b9a6f861b4 Update the callgraph correctly. 
llvm-svn: 55896
 2008-09-08 11:08:09 +00:00
Duncan Sands
3cf7d86556 Update the callgraph correctly in ArgumentPromotion. 
llvm-svn: 55895
 2008-09-08 11:07:35 +00:00
Duncan Sands
46911f1271 Reapply 55859. This doesn't change anything as 
long as the callgraph is correct.  It checks
for wrong callgraphs more strictly.

llvm-svn: 55894
 2008-09-08 11:05:51 +00:00
Duncan Sands
1ea0d2e6db Correct a comment and strip trailing whitespace. 
llvm-svn: 55883
 2008-09-07 09:54:09 +00:00
Nuno Lopes
421f488cb7 fix crash when the malloc/free function is defined or is a declaration with 0 parameters. 
this pass doesnt seem to be used, but still it's now a little more correct

llvm-svn: 55873
 2008-09-06 17:44:06 +00:00
Duncan Sands
95c2a7848a When PruneEH turned an invoke into an ordinary 
call (thus changing the call site) it didn't
inform the callgraph about this.  But the
call site does matter - as shown by the testcase,
the callgraph become invalid after the inliner
ran (with an edge between two functions simply
missing), resulting in wrong deductions by
GlobalsModRef.

llvm-svn: 55872
 2008-09-06 17:19:29 +00:00
Owen Anderson
1dd2e40521 Revert r55859. This is breaking the build in the abscence of its companion commit. 
llvm-svn: 55865
 2008-09-05 23:36:01 +00:00
Devang Patel
d94269f906 Remove unused map. 
llvm-svn: 55861
 2008-09-05 21:55:33 +00:00
Duncan Sands
9e23602849 Delete the removeCallEdgeTo callgraph method, 
because it does not maintain a correct list
of callsites.  I discovered (see following
commit) that the inliner will create a wrong
callgraph if it is fed a callgraph with
correct edges but incorrect callsites.  These
were created by Prune-EH, and while it wasn't
done via removeCallEdgeTo, it could have been
done via removeCallEdgeTo, which is an accident
waiting to happen.  Use removeCallEdgeFor
instead.

llvm-svn: 55859
 2008-09-05 21:43:04 +00:00
Duncan Sands
3a52056d4d Use removeAllCalledFunctions rather than removing 
edges one by one by hand.

llvm-svn: 55836
 2008-09-05 14:56:53 +00:00
Duncan Sands
7c8fb1ad93 Remove trailing whitespace. 
llvm-svn: 55835
 2008-09-05 12:37:12 +00:00
Duncan Sands
6dd02b5219 Make this pass return that it made a change if 
it modifies a functions attributes.

llvm-svn: 55831
 2008-09-05 09:08:37 +00:00
Devang Patel
40519f0370 A loop may be unswitched multiple times. Reconstruct dom info. at the end. 
llvm-svn: 55806
 2008-09-04 22:43:59 +00:00
Devang Patel
00ec74616b Initialize loop data first. 
llvm-svn: 55792
 2008-09-04 20:36:36 +00:00
Devang Patel
d52071540c Do not unswitch if the function notes say we're optimizing this function for size. 
llvm-svn: 55786
 2008-09-04 18:55:13 +00:00
Andrew Lenharth
19fb2aba50 try to seperate the mechanism into something others can use 
llvm-svn: 55785
 2008-09-04 18:51:26 +00:00
Dale Johannesen
fe1bb7964c Add intrinsic forms of pow and exp2. The non-intrinsic 
forms remain to handle older IR files, but will go away soon.

llvm-svn: 55781
 2008-09-04 18:30:46 +00:00
Dan Gohman
a79db30d28 Tidy up several unbeseeming casts from pointer to intptr_t. 
llvm-svn: 55779
 2008-09-04 17:05:41 +00:00
Andrew Lenharth
95d573a7f0 cleanup as per Duncan's review 
llvm-svn: 55766
 2008-09-04 14:34:22 +00:00
Devang Patel
a26e2075b8 Update inline threshold for current function if the notes say, optimize for size. 
llvm-svn: 55745
 2008-09-03 23:06:09 +00:00
Owen Anderson
2fbfb70530 Fix a bug that prevented PRE from applying in some cases. 
llvm-svn: 55744
 2008-09-03 23:06:07 +00:00
Andrew Lenharth
9fed8f5b9c Initial version of a Partial Specialization IPO pass. It triggers a couple hundred times on 176.gcc. I don't know the performance impact yet, the heuristic is quite simple still. 
llvm-svn: 55734
 2008-09-03 21:00:28 +00:00
Devang Patel
a563d24e5d Fix typo in a comment. 
llvm-svn: 55720
 2008-09-03 20:25:40 +00:00
Devang Patel
a4211876e5 Add parentheses to make code more readable. 
llvm-svn: 55717
 2008-09-03 19:57:15 +00:00
Devang Patel
50c66cdb0d Fix comments. 
llvm-svn: 55716
 2008-09-03 19:52:17 +00:00
Devang Patel
924d9084d8 Add custom inliner that handles only functions that are marked as always_inline. 
llvm-svn: 55713
 2008-09-03 18:50:53 +00:00
Devang Patel
0d442ffa2b Handle "always inline" note during inline cost analysis. 
llvm-svn: 55712
 2008-09-03 18:47:45 +00:00
Devang Patel
79661994b1 Check noinline note and ignore other notes. 
llvm-svn: 55711
 2008-09-03 18:46:35 +00:00
Devang Patel
62be9ad270 Handle "noinline" note inside the simple inliner. 
llvm-svn: 55708
 2008-09-03 18:10:21 +00:00
Nick Lewycky
2fcb26cc75 Don't apply this transform to vectors. Fixes PR2756. 
llvm-svn: 55690
 2008-09-03 06:24:21 +00:00