wangtao
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
112,095 Commits 29 Branches 0 Tags 2.2 GiB
Commit Graph

105 Commits

Author SHA1 Message Date
Bill Wendling a3ba6d3b80 Reduce indentation. No functionality change. 
llvm-svn: 138968
 2011-09-01 21:29:49 +00:00
Bill Wendling bf8280ff27 Change worklist driven deletion to be an iterative process. 
Duncan noticed this!

llvm-svn: 138967
 2011-09-01 21:28:33 +00:00
Bill Wendling a617c32745 Resubmit with fix. Properly remove the instructions except for landingpad, which should be removed only when its invokes are. 
llvm-svn: 138932
 2011-09-01 01:28:11 +00:00
Bill Wendling 9f7cf20e60 Submitted this too early. 
llvm-svn: 138931
 2011-09-01 01:18:33 +00:00
Bill Wendling 2d1f11f743 Don't DCE the landingpad instruction. 
The landingpad instruction can be removed only when its invokes are removed.

llvm-svn: 138930
 2011-09-01 01:16:58 +00:00
Bill Wendling a9ee09f4be Revert r137655. There is some question about whether the 'landingpad' 
instruction should be marked as potentially reading and/or writing memory.

llvm-svn: 137863
 2011-08-17 20:36:44 +00:00
Bill Wendling 8ddfc09e7a Use the getFirstInsertionPt() method instead of getFirstNonPHI + an 'isa<>' 
check for a LandingPadInst.

llvm-svn: 137745
 2011-08-16 20:45:24 +00:00
Bill Wendling 91d4e9edec Don't sink the instruction to before a landingpad instruction. 
llvm-svn: 137672
 2011-08-15 22:53:05 +00:00
Eli Friedman 8bc586e770 Update instcombine for atomic load/store. 
llvm-svn: 137664
 2011-08-15 22:09:40 +00:00
Bill Wendling e86965ee19 Duncan pointed out that the LandingPadInst might read memory. (It might also 
write to memory.) Marking it as such makes some checks for immobility go away.

llvm-svn: 137655
 2011-08-15 21:14:31 +00:00
Bill Wendling dd94d3426b Don't try to sink the landingpad instruction. It's immobile. 
llvm-svn: 137629
 2011-08-15 18:23:40 +00:00
Nick Lewycky 746e317953 This transform is not safe. Thanks to Eli for pointing that out! 
llvm-svn: 137575
 2011-08-14 04:51:49 +00:00
Nick Lewycky ae13df60a6 Don't attempt to add 'nsw' when intermediate instructions had no such guarantee. 
llvm-svn: 137572
 2011-08-14 03:41:33 +00:00
Nick Lewycky de49278c26 Teach instcombine to preserve the nsw bit by doing an after-the-fact analysis 
when combining add and sub instructions. Patch by Pranav Bhandarkar!

llvm-svn: 137570
 2011-08-14 01:45:19 +00:00
Nick Lewycky d405b7e2ae Small cleanups: 
- use SmallVectorImpl& for the function argument.
  - ignore the operands on the GEP, even if they aren't constant! Much as we
    pretend the malloc succeeds, we pretend that malloc + whatever-you-GEP'd-by
    is not null. It's magic!

llvm-svn: 136757
 2011-08-03 01:11:40 +00:00
Nick Lewycky 50f4966ceb Fix logical error when detecting lifetime intrinsics. 
Don't replace a gep/bitcast with 'undef' because that will form a "free(undef)"
which in turn means "unreachable". What we wanted was a no-op. Instead, analyze
the whole tree and look for all the instructions we need to delete first, then
delete them second, not relying on the use_list to stay consistent.

llvm-svn: 136752
 2011-08-03 00:43:35 +00:00
Nick Lewycky e8ae02dfb9 Teach InstCombine that lifetime intrincs aren't a real user on the result of a 
malloc call.

llvm-svn: 136732
 2011-08-02 22:08:01 +00:00
Rafael Espindola a3a44f3fc3 Add a small gep optimization I noticed was missing while reading some IL. 
llvm-svn: 136585
 2011-07-31 04:43:41 +00:00
Jay Foad d1b7849d49 Convert GetElementPtrInst to use ArrayRef. 
llvm-svn: 135904
 2011-07-25 09:48:08 +00:00
Jay Foad 040dd82f44 Convert IRBuilder::CreateGEP and IRBuilder::CreateInBoundsGEP to use 
ArrayRef.

llvm-svn: 135761
 2011-07-22 08:16:57 +00:00
Jay Foad b992a635fb Convert SimplifyGEPInst to use ArrayRef. 
llvm-svn: 135482
 2011-07-19 15:07:52 +00:00
Frits van Bommel 717d7edd3e Migrate LLVM and Clang to use the new makeArrayRef(...) functions where previously explicit non-default constructors were used. 
Mostly mechanical with some manual reformatting.

llvm-svn: 135390
 2011-07-18 12:00:32 +00:00
Chris Lattner 229907cd11 land David Blaikie's patch to de-constify Type, with a few tweaks. 
llvm-svn: 135375
 2011-07-18 04:54:35 +00:00
Jay Foad 57aa636794 Convert InsertValueInst and ExtractValueInst APIs to use ArrayRef. 
llvm-svn: 135040
 2011-07-13 10:26:04 +00:00
Rafael Espindola 403256763f Don't duplicate the work done by a gep into a "bitcast" if the gep has 
more than one use.

Fixes PR10322.

llvm-svn: 134883
 2011-07-11 03:43:47 +00:00
Eli Friedman 35211c6091 Final step of instcombine debuginfo; switch a couple more places over to InsertNewInstWith, and use setDebugLoc for the cases which can't be easily handled by the automated mechanisms. 
llvm-svn: 132167
 2011-05-27 00:19:40 +00:00
Eli Friedman 68aab459ae Make instcombine O(N) instead of O(N^2) in code where the same simplifiable constant is used many times. 
Part of rdar://9471075.

llvm-svn: 131979
 2011-05-24 18:52:07 +00:00
Eli Friedman 41e509a33d More instcombine cleanup, towards improving debug line info. 
llvm-svn: 131604
 2011-05-18 23:58:37 +00:00
Eli Friedman 96254a0d53 Start trying to make InstCombine preserve more debug info. The idea here is to set the debug location on the IRBuilder, which will be then right location in most cases. This should magically give many transformations debug locations, and fixing places which are missing a debug location will usually just means changing the code creating it to use the IRBuilder. 
As an example, the change to InstCombineCalls catches a common case where a call to a bitcast of a function is rewritten.

Chris, does this approach look reasonable?

llvm-svn: 131516
 2011-05-18 01:28:27 +00:00
Eli Friedman b9ed18f2cb Use ReplaceInstUsesWith instead of replaceAllUsesWith where appropriate in instcombine. 
llvm-svn: 131512
 2011-05-18 00:32:01 +00:00
Duncan Sands 085ad3b81a Stop trying to have instcombine preserve LCSSA form: this was not 
effective in avoiding recomputation of LCSSA form; the widespread
use of instsimplify (which looks through phi nodes) means it was
not preserving LCSSA form anyway; and instcombine is no longer
scheduled in the middle of the loop passes so this doesn't matter
anymore.

llvm-svn: 130301
 2011-04-27 10:55:12 +00:00
Nadav Rotem a069c6ce05 InstCombine optimizes gep(bitcast(x)) even when the bitcasts casts away address 
space info. We crash with an assert in this case. This change checks that the
address space of the bitcasted pointer is the same as the gep ptr.

llvm-svn: 128884
 2011-04-05 14:29:52 +00:00
Jay Foad 52131344a2 Remove PHINode::reserveOperandSpace(). Instead, add a parameter to 
PHINode::Create() giving the (known or expected) number of operands.

llvm-svn: 128537
 2011-03-30 11:28:46 +00:00
Jay Foad 1c83965f5a Make more use of PHINode::getNumIncomingValues(). 
llvm-svn: 128406
 2011-03-28 13:03:10 +00:00
Devang Patel aad34d882d Try to not lose variable's debug info during instcombine. 
This is done by lowering dbg.declare intrinsic into dbg.value intrinsic.
Radar 9143931.

llvm-svn: 127834
 2011-03-17 22:18:16 +00:00
Devang Patel 8d53ac81ec Do not forget DebugLoc! 
llvm-svn: 125547
 2011-02-15 02:02:30 +00:00
Dan Gohman c6f0bda839 Conservatively, clear optional flags, such as nsw, when performing 
reassociation. No testcase, because I wasn't able to create a testcase
which actually demonstrates a problem.

llvm-svn: 124713
 2011-02-02 02:05:46 +00:00
Chris Lattner b5e15d1907 fix PR9013, an infinite loop in instcombine. 
llvm-svn: 123968
 2011-01-21 05:29:50 +00:00
Chris Lattner f4ca47bda8 update obsolete comment. 
llvm-svn: 123965
 2011-01-21 05:08:26 +00:00
Nick Lewycky 6a083cf820 Don't try to pull vector bitcasts that change the number of elements through 
a select. A vector select is pairwise on each element so we'd need a new
condition with the right number of elements to select on. Fixes PR8994.

llvm-svn: 123963
 2011-01-21 02:30:43 +00:00
Chris Lattner adb1a233b1 remove a dead check, this was needed before we had an explicit veto on uses of phis. 
llvm-svn: 123569
 2011-01-16 05:37:55 +00:00
Chris Lattner d55581ded8 enhance FoldOpIntoPhi in instcombine to try harder when a phi has 
multiple uses.  In some cases, all the uses are the same operation,
so instcombine can go ahead and promote the phi.  In the testcase
this pushes an add out of the loop.

llvm-svn: 123568
 2011-01-16 05:28:59 +00:00
Chris Lattner ea7131a062 remove the AllowAggressive argument to FoldOpIntoPhi. It is forced to false in the 
first line of the function because it isn't a good idea, even for compares.

llvm-svn: 123566
 2011-01-16 05:14:26 +00:00
Chris Lattner ff2e737714 more cleanups: use the IR builder. 
llvm-svn: 123565
 2011-01-16 05:08:00 +00:00
Chris Lattner 25ce280511 tidy up code. 
llvm-svn: 123564
 2011-01-16 04:37:29 +00:00
Duncan Sands fbb9ac3cca Add a generic expansion transform: A op (B op' C) -> (A op B) op' (A op C) 
if both A op B and A op C simplify.  This fires fairly often but doesn't
make that much difference.  On gcc-as-one-file it removes two "and"s and
turns one branch into a select.

llvm-svn: 122399
 2010-12-22 13:36:08 +00:00
Duncan Sands 3547d2ebd8 Add some statistics, good for understanding how much more powerful 
instcombine is compared to instsimplify.

llvm-svn: 122397
 2010-12-22 09:40:51 +00:00
Chris Lattner 4fb9dd4c74 fix an oversight caught by Frits! 
llvm-svn: 122204
 2010-12-19 23:24:04 +00:00
Chris Lattner 3e635d2e99 move a transformation to a more logical place, simplifying it. 
llvm-svn: 122183
 2010-12-19 19:43:52 +00:00
Frits van Bommel 28218aa8f1 Transform (extractvalue (load P), ...) to (load (gep P, 0, ...)) if the load has no other uses, shrinking the load. 
llvm-svn: 120323
 2010-11-29 21:56:20 +00:00