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4033 Commits

Author SHA1 Message Date
Andrew Trick
671f73b951 Fixes PR11070 - assert in SCEV getConstantEvolvingPHIOperands. 
llvm-svn: 141219
 2011-10-05 22:06:53 +00:00
Andrew Trick
94a7b27585 Typo. Thanks Bob. 
llvm-svn: 141188
 2011-10-05 16:52:28 +00:00
Chandler Carruth
9fc5856d54 Fix a broken assert found by -Wparentheses. 
llvm-svn: 141168
 2011-10-05 07:02:23 +00:00
Andrew Trick
79a14ca34e Fix disabled SCEV analysis caused r141161 and add unit test. 
I noticed during self-review that my previous checkin disabled some
analysis. Even with the reenabled analysis the test case runs in about
5ms. Without the fix, it will take several minutes at least.

llvm-svn: 141164
 2011-10-05 05:58:49 +00:00
Andrew Trick
5789485111 Avoid exponential recursion in SCEV getConstantEvolvingPHI and EvaluateExpression. 
Note to compiler writers: never recurse on multiple instruction
operands without memoization.
Fixes rdar://10187945. Was taking 45s, now taking 5ms.

llvm-svn: 141161
 2011-10-05 03:25:31 +00:00
Nick Lewycky
6833d72fc0 The product of two chrec's can always be represented as a chrec. 
llvm-svn: 141066
 2011-10-04 06:51:26 +00:00
Nick Lewycky
4898eef762 Reapply r140979 with fix! We never did get a testcase, but careful review of the 
logic by David Meyer revealed this bug.

llvm-svn: 140992
 2011-10-03 07:10:45 +00:00
Nick Lewycky
79fec8116f Revert r140979 due to reports of bootstrap failure. 
llvm-svn: 140980
 2011-10-03 05:14:59 +00:00
Nick Lewycky
a760a29395 Add one more case we compute a max trip count. 
llvm-svn: 140979
 2011-10-03 01:03:57 +00:00
Andrew Trick
0489c5410d Inlining and unrolling heuristics should be aware of free truncs. 
We want heuristics to be based on accurate data, but more importantly
we don't want llvm to behave randomly. A benign trunc inserted by an
upstream pass should not cause a wild swings in optimization
level. See PR11034. It's a general problem with threshold-based
heuristics, but we can make it less bad.

llvm-svn: 140919
 2011-10-01 01:39:05 +00:00
Andrew Trick
a1161d94f5 whitespace 
llvm-svn: 140916
 2011-10-01 01:27:56 +00:00
Andrew Trick
50915b5136 indvars: generalize SCEV getPreStartForSignExtend. 
Handle general Add expressions to avoid leaving around redundant
32-bit IVs.

llvm-svn: 140701
 2011-09-28 17:02:54 +00:00
Eli Friedman
f4f4a75d2b PR10628: Fix getModRefInfo so it queries the underlying alias() implementation correctly while checking nocapture calls. 
llvm-svn: 140666
 2011-09-28 00:34:27 +00:00
Benjamin Kramer
355b353595 Stop emitting instructions with the name "tmp" they eat up memory and have to be uniqued, without any benefit. 
If someone prefers %tmp42 to %42, run instnamer.

llvm-svn: 140634
 2011-09-27 20:39:19 +00:00
Eli Friedman
9c1a430966 Enhance alias analysis for atomic instructions a bit. Upgrade a couple alias-analysis tests to the new atomic instructions. 
llvm-svn: 140557
 2011-09-26 20:15:28 +00:00
Galina Kistanova
5d64adbe43 Fix for DbgInfoPrinter.cpp:174:12: warning: ‘LineNo’ may be used uninitialized in this function. 
llvm-svn: 140281
 2011-09-21 23:34:23 +00:00
Devang Patel
e5dc3a1f1e Add support to emit debug info for C++0x nullptr type. 
llvm-svn: 139751
 2011-09-14 23:13:28 +00:00
Eric Christopher
665ace6bce Fix typo. 
llvm-svn: 139530
 2011-09-12 19:58:22 +00:00
Devang Patel
c7a1210467 Add asserts to keep front-ends honest while encoding debug info into LLVM IR using DIBuilder. 
llvm-svn: 139515
 2011-09-12 18:26:08 +00:00
Andrew Trick
8af62b87e4 Set NSW/NUW flags on SCEVAddExpr when the operation is flagged as 
such.

I'm doing this now for completeness because I can't think of/remember
any reason that it was left out. I'm not sure it will help anything,
but if we don't do it we need to explain why in comments.

llvm-svn: 139450
 2011-09-10 01:09:50 +00:00
Eli Friedman
c933295353 A couple minor corrections to r139276. 
llvm-svn: 139277
 2011-09-08 02:37:07 +00:00
Eli Friedman
6e9cab83b0 Fix the logic in BasicAliasAnalysis::aliasGEP for comparing GEP's with variable differences so that it actually does something sane. Fixes PR10881. 
llvm-svn: 139276
 2011-09-08 02:23:31 +00:00
Owen Anderson
9ae90800a2 memset_pattern16 uses a 16 BYTE pattern, not a 16 BIT pattern. Add comments to that effect. 
llvm-svn: 139205
 2011-09-06 23:43:26 +00:00
Owen Anderson
483f94e8d1 Teach BasicAA about the aliasing properties of memset_pattern16. 
Fixes PR10872 and <rdar://problem/10065079>.

llvm-svn: 139204
 2011-09-06 23:33:25 +00:00
Nick Lewycky
8203bcfd03 This transform only handles two-operand AddRec's. Prevent it from trying to 
handle anything more complex. Fixes PR10383 again!

llvm-svn: 139186
 2011-09-06 21:42:18 +00:00
Devang Patel
2c2dd9114e Now, named mdnode llvm.dbg.cu keeps track of all compile units in a module. Update DebugInfoFinder to collect compile units from llvm.dbg.cu. 
llvm-svn: 139147
 2011-09-06 17:40:08 +00:00
Nick Lewycky
e1c0b41d41 Fix typo in comment again. 
llvm-svn: 139139
 2011-09-06 07:02:40 +00:00
Nick Lewycky
700f71a0ac Apparently we compile the code, not the comments. Thanks Eli! 
llvm-svn: 139138
 2011-09-06 06:56:00 +00:00
Nick Lewycky
4add6eec38 Fix typo in comment. 
llvm-svn: 139137
 2011-09-06 06:46:01 +00:00
Nick Lewycky
0c9df5d6c2 Nope! I had it right the first time. Revert the operative part of r139135 and 
add more showing of my work.

llvm-svn: 139136
 2011-09-06 06:39:54 +00:00
Nick Lewycky
39b165bb7d Fix flipped sign. While there, show my math. 
llvm-svn: 139135
 2011-09-06 05:33:18 +00:00
Nick Lewycky
fdc650ea7a No no no, fix typo properly! 
llvm-svn: 139134
 2011-09-06 05:08:09 +00:00
Nick Lewycky
3823432a57 The logic inside getMulExpr to simplify {a,+,b}*{c,+,d} was wrong, which was 
visible given a=b=c=d=1, on iteration #1 (the second iteration). Replace it with
correct math. Fixes PR10383!

llvm-svn: 139133
 2011-09-06 05:05:14 +00:00
Nick Lewycky
18c0b01a56 Revert r139126 due to selfhost failures reported by buildbots. 
llvm-svn: 139130
 2011-09-06 02:43:13 +00:00
Nick Lewycky
30dcc754df Teach SCEV to report a max backedge count in one interesting case in 
HowFarToZero; the case for a canonical loop.

llvm-svn: 139126
 2011-09-05 23:25:16 +00:00
Benjamin Kramer
ec933b857e InstSimplify: Don't try to replace an extractvalue/insertvalue pair with the original value if types don't match. 
Fixes clang selfhost.

llvm-svn: 139120
 2011-09-05 18:16:19 +00:00
Duncan Sands
a74d10bb60 Add some simple insertvalue simplifications, for the purpose of cleaning 
up do-nothing exception handling code produced by dragonegg.

llvm-svn: 139113
 2011-09-05 06:52:48 +00:00
Benjamin Kramer
0c1a5d2067 Use canonical forms for the branch probability zero heutistic. 
- Drop support for X >u 0, it's equivalent to X != 0 and should be canonicalized into the latter.
- Add X < 1 -> unlikely, which is what instcombine canonicalizes X <= 0 into.
- Add X > -1 -> likely, which is what instcombine canonicalizes X >= 0 into.

llvm-svn: 139110
 2011-09-04 23:53:04 +00:00
Andrew Trick
43d88c3879 Comment and clarifying assert. 
llvm-svn: 139036
 2011-09-02 21:20:46 +00:00
Devang Patel
26f7aeed7c After r138010, subroutine type does not have context info. Update type verifier accordingly. 
This fixes ptype.exp gdb testsuite regressions.

llvm-svn: 138869
 2011-08-31 18:04:31 +00:00
Nadav Rotem
43912ff374 Fixes following the CR by Chris and Duncan: 
Optimize chained bitcasts of the form A->B->A.
Undo r138722 and change isEliminableCastPair to allow this case.

llvm-svn: 138756
 2011-08-29 19:58:36 +00:00
Andrew Trick
026fa4da72 Reapply r138695. Fix PassManager stack depths. 
Patch by Xiaoyi Guo!

llvm-svn: 138737
 2011-08-29 17:07:00 +00:00
Nadav Rotem
6280c8eecc Bitcasts are transitive. Bitcast-Bitcast-X becomes Bitcast-X. 
llvm-svn: 138722
 2011-08-28 11:51:08 +00:00
Andrew Trick
65754eb3f7 Reverting r138695 to see if it fixes clang self host. 
llvm-svn: 138701
 2011-08-27 06:10:16 +00:00
Andrew Trick
e38568bc07 Fix PassManager stack depths. 
Patch by Xiaoyi Guo!

llvm-svn: 138695
 2011-08-27 02:11:03 +00:00
Eric Christopher
09fd6a961c Whitespace and 80-col. 
llvm-svn: 138654
 2011-08-26 21:02:40 +00:00
Andrew Trick
504187a152 LoopInfo::updateUnloop fix, and verify Block->Loop maps. 
Fixes an oversight, and adds verification to catch it in the unloop.ll tests.

llvm-svn: 138622
 2011-08-26 03:06:34 +00:00
Bill Wendling
15062f817a Skip the landingpad instruction when determining the insertion point. 
llvm-svn: 138481
 2011-08-24 21:06:46 +00:00
Nadav Rotem
43673d6d0b Implement Constant::isAllOnesValue(). Fix ConstantFolding to use the new api. 
llvm-svn: 138469
 2011-08-24 20:18:38 +00:00
Eric Christopher
aa4993b9aa Revert "Address Duncan's CR request:" 
This reverts commit 20a05be15ea5271ab6185b83200fa88263362400. (svn rev 138340)

Conflicts:

	test/Transforms/InstCombine/bitcast.ll

llvm-svn: 138366
 2011-08-23 20:11:10 +00:00