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Commit Graph

571 Commits

Author SHA1 Message Date
Chris Lattner
a61306d68f switch InlineInfo.DevirtualizedCalls's list to be of WeakVH.
This fixes a bug where calls inlined into an invoke would get
changed into an invoke but the array would keep pointing to
the (now dead) call.  The improved inliner behavior is still
disabled for now.

llvm-svn: 102196
2010-04-23 18:37:01 +00:00
Chris Lattner
5d87e1be44 The inliner was choosing to not consider call sites
that appear in the SCC as a result of inlining as candidates
for inlining.  Change this so that it *does* consider call 
sites that change from being indirect to being direct as a
result of inlining.  This allows it to completely 
"devirtualize" the testcase.

llvm-svn: 102146
2010-04-22 23:37:35 +00:00
Chris Lattner
5edbd34cff refactor the interface to InlineFunction so that most of the in/out
arguments are handled with a new InlineFunctionInfo class.  This 
makes it easier to extend InlineFunction to return more info in the
future.

llvm-svn: 102137
2010-04-22 23:07:58 +00:00
Devang Patel
788913a131 There is no need to install ValueMapper.h header.
llvm-svn: 101949
2010-04-20 22:18:31 +00:00
Bob Wilson
ad00f21093 Re-commit my previous SSAUpdater changes. The previous version naively tried
to determine where to place PHIs by iteratively comparing reaching definitions
at each block.  That was just plain wrong.  This version now computes the
dominator tree within the subset of the CFG where PHIs may need to be placed,
and then places the PHIs in the iterated dominance frontier of each definition.
The rest of the patch is mostly the same, with a few more performance
improvements added in.

llvm-svn: 101612
2010-04-17 03:08:24 +00:00
Chris Lattner
6a038be777 introduce a new CallGraphSCC class, and pass it around
to CallGraphSCCPass's instead of passing around a
std::vector<CallGraphNode*>.  No functionality change,
but now we have a much tidier interface.

llvm-svn: 101558
2010-04-16 22:42:17 +00:00
Owen Anderson
73c74b3153 SCCVN, we hardly knew ye!
llvm-svn: 101117
2010-04-13 05:24:08 +00:00
Eric Christopher
70a6c8fd6d Add support for stpncpy_chk.
llvm-svn: 100710
2010-04-07 23:00:07 +00:00
Mon P Wang
484bbe6aa9 Reapply address space patch after fixing an issue in MemCopyOptimizer.
Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)

llvm-svn: 100304
2010-04-04 03:10:48 +00:00
Bob Wilson
5a3200f750 Revert all my SSAUpdater patches. The PHI placement algorithm is not correct
(what was I thinking?) and there's also a problem with LCSSA.  I'll try again
later with fixes.

--- Reverse-merging r100263 into '.':
U    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100177 into '.':
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100148 into '.':
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100147 into '.':
U    include/llvm/Transforms/Utils/SSAUpdater.h
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100131 into '.':
G    include/llvm/Transforms/Utils/SSAUpdater.h
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100130 into '.':
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100126 into '.':
G    include/llvm/Transforms/Utils/SSAUpdater.h
G    lib/Transforms/Utils/SSAUpdater.cpp
--- Reverse-merging r100050 into '.':
D    test/Transforms/GVN/2010-03-31-RedundantPHIs.ll
--- Reverse-merging r100047 into '.':
G    include/llvm/Transforms/Utils/SSAUpdater.h
G    lib/Transforms/Utils/SSAUpdater.cpp

llvm-svn: 100264
2010-04-03 03:50:38 +00:00
Mon P Wang
0ccf050ca3 Revert r100191 since it breaks objc in clang
llvm-svn: 100199
2010-04-02 18:43:02 +00:00
Mon P Wang
a01350755e Reapply address space patch after fixing an issue in MemCopyOptimizer.
Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)

llvm-svn: 100191
2010-04-02 18:04:15 +00:00
Bob Wilson
08cc4030dd Rewrite another SSAUpdater function to avoid recursion.
llvm-svn: 100147
2010-04-01 23:05:58 +00:00
Bob Wilson
bfd85d79c1 Change another SSAUpdater function to avoid recursion.
llvm-svn: 100131
2010-04-01 20:04:30 +00:00
Bob Wilson
205385244c The SSAUpdater should avoid recursive traversals of the CFG, since that may
blow out the stack for really big functions.  Start by fixing an easy case.

llvm-svn: 100126
2010-04-01 18:46:59 +00:00
Bob Wilson
2a872616de Rewrite part of the SSAUpdater to be more careful about inserting redundant
PHIs.  The previous algorithm was unable to reliably detect when existing
PHIs in a cycle can be reused.  I'm still working on reducing a testcase.
Radar 7711900.

llvm-svn: 100047
2010-03-31 20:51:00 +00:00
Bob Wilson
aae933cc81 Revert Mon Ping's change 99928, since it broke all the llvm-gcc buildbots.
llvm-svn: 99948
2010-03-30 22:27:04 +00:00
Mon P Wang
9351ea594a Added support for address spaces and added a isVolatile field to memcpy, memmove, and memset,
e.g., llvm.memcpy.i32(i8*, i8*, i32, i32) -> llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
A update of langref will occur in a subsequent checkin.

llvm-svn: 99928
2010-03-30 20:55:56 +00:00
Evan Cheng
4f4954b532 Add comment.
llvm-svn: 99284
2010-03-23 15:50:49 +00:00
Evan Cheng
031c6d2de6 Forgot this.
llvm-svn: 99283
2010-03-23 15:49:37 +00:00
Benjamin Kramer
19c12c8ef4 Add a virtual destructor and give vtable a home.
llvm-svn: 98376
2010-03-12 20:41:29 +00:00
Benjamin Kramer
0592752a53 Factor checked library call optimization into a common helper class and use it
to unify the almost identical code in CodeGenPrepare and InstCombineCalls.

llvm-svn: 98338
2010-03-12 09:27:41 +00:00
Benjamin Kramer
846fefb000 stpcpy is so similar to strcpy, it doesn't deserve a complete copy of the __strcpy_chk -> strcpy code.
llvm-svn: 98284
2010-03-11 20:45:13 +00:00
Eric Christopher
017a0a06d8 Lower stpcpy_chk when possible.
llvm-svn: 98274
2010-03-11 19:24:34 +00:00
Eric Christopher
c2a92dadc5 Add strncpy libcall creator. Use it when it should be used.
llvm-svn: 98219
2010-03-11 01:25:07 +00:00
Jakob Stoklund Olesen
189a55cc16 Try to keep the cached inliner costs around for a bit longer for big functions.
The Caller cost info would be reset everytime a callee was inlined. If the
caller has lots of calls and there is some mutual recursion going on, the
caller cost info could be calculated many times.

This patch reduces inliner runtime from 240s to 0.5s for a function with 20000
small function calls.

This is a more conservative version of r98089 that doesn't break the clang
test CodeGenCXX/temp-order.cpp. That test relies on rather extreme inlining
for constant folding.

llvm-svn: 98099
2010-03-09 23:02:17 +00:00
Jakob Stoklund Olesen
24bdfeee51 Revert r98089, it was breaking a clang test.
llvm-svn: 98094
2010-03-09 22:43:37 +00:00
Jakob Stoklund Olesen
0e8f00292c Try to keep the cached inliner costs around for a bit longer for big functions.
The Caller cost info would be reset everytime a callee was inlined. If the
caller has lots of calls and there is some mutual recursion going on, the
caller cost info could be calculated many times.

This patch reduces inliner runtime from 240s to 0.5s for a function with 20000
small function calls.

llvm-svn: 98089
2010-03-09 22:17:11 +00:00
Eric Christopher
dfb465a816 Move SimplifyLibCalls's LibCall builders to a separate file so they
can be used in more places.  Add an argument for the TargetData that
most of them need. Update for the getInt8PtrTy() change.  Should be
no functionality change.

llvm-svn: 97844
2010-03-05 22:25:30 +00:00
Bob Wilson
6d8360b3d8 Revert r97245 which seems to be causing performance problems.
llvm-svn: 97366
2010-02-28 05:34:05 +00:00
Bob Wilson
139fdbd4d2 Move the EnableFullLoadPRE flag from a separate command-line option to an
argument of createGVNPass and set it automatically for -O3.

llvm-svn: 97245
2010-02-26 19:09:47 +00:00
Bob Wilson
cf20a07501 Remove unused "NoPRE" parameter in GVN and createGVNPass().
llvm-svn: 97235
2010-02-26 18:35:19 +00:00
Bob Wilson
86dded571f Rename SuccessorNumber to GetSuccessorNumber.
llvm-svn: 96387
2010-02-16 21:06:42 +00:00
Bob Wilson
1115365fcf Refactor to share code to find the position of a basic block successor in the
terminator's list of successors.

llvm-svn: 96377
2010-02-16 19:49:17 +00:00
Eric Christopher
871cf7bce2 Pull these back out, they're a little too aggressive and time
consuming for a simple optimization.

llvm-svn: 95671
2010-02-09 17:29:18 +00:00
Eric Christopher
428b385575 Add a new pass to do llvm.objsize lowering using SCEV.
Initial skeleton and SCEVUnknown lowering implemented,
the rest should come relatively quickly.  Move testcase
to new directory.

Move pass to right before SimplifyLibCalls - which is
moved down a bit so we can take advantage of a few opts.

llvm-svn: 95628
2010-02-09 00:35:38 +00:00
Jakob Stoklund Olesen
83ebc265b3 Reintroduce the InlineHint function attribute.
This time it's for real! I am going to hook this up in the frontends as well.

The inliner has some experimental heuristics for dealing with the inline hint.
When given a -respect-inlinehint option, functions marked with the inline
keyword are given a threshold just above the default for -O3.

We need some experiments to determine if that is the right thing to do.

llvm-svn: 95466
2010-02-06 01:16:28 +00:00
Jakob Stoklund Olesen
670458b3be Teach SimplifyCFG about magic pointer constants.
Weird code sometimes uses pointer constants other than null. This patch
teaches SimplifyCFG to build switch instructions in those cases.

Code like this:

void f(const char *x) {
  if (!x)
    puts("null");
  else if ((uintptr_t)x == 1)
    puts("one");
  else if (x == (char*)2 || x == (char*)3)
    puts("two");
  else if ((intptr_t)x == 4)
    puts("four");
  else
    puts(x);
}

Now becomes a switch:

define void @f(i8* %x) nounwind ssp {
entry:
  %magicptr23 = ptrtoint i8* %x to i64            ; <i64> [#uses=1]
  switch i64 %magicptr23, label %if.else16 [
    i64 0, label %if.then
    i64 1, label %if.then2
    i64 2, label %if.then9
    i64 3, label %if.then9
    i64 4, label %if.then14
  ]

Note that LLVM's own DenseMap uses magic pointers.

llvm-svn: 95439
2010-02-05 22:03:18 +00:00
Bob Wilson
0f04082970 Check alignment of loads when deciding whether it is safe to execute them
unconditionally.  Besides checking the offset, also check that the underlying
object is aligned as much as the load itself.

llvm-svn: 94875
2010-01-30 04:42:39 +00:00
Bob Wilson
f897b7b37e Improve isSafeToLoadUnconditionally to recognize that GEPs with constant
indices are safe if the result is known to be within the bounds of the
underlying object.

llvm-svn: 94829
2010-01-29 19:19:08 +00:00
Benjamin Kramer
cfe07fadc7 Don't bother with sprintf, just pass the Twine through.
llvm-svn: 94684
2010-01-27 19:58:47 +00:00
Victor Hernandez
d44671b931 DbgInfoIntrinsics no longer appear in an instruction's use list; so clean up looking for them in use iterations and remove OnlyUsedByDbgInfoIntrinsics()
llvm-svn: 94111
2010-01-21 23:05:53 +00:00
Jakob Stoklund Olesen
ac14f3bf31 Move per-function inline threshold calculation to a method.
No functional change except the forgotten test for
InlineLimit.getNumOccurrences() == 0 in the CurrentThreshold2 calculation.

llvm-svn: 94007
2010-01-20 17:51:28 +00:00
Chris Lattner
87f86498c3 add a helper function.
llvm-svn: 93251
2010-01-12 19:40:54 +00:00
Dan Gohman
41cc1e1fc4 Make RecursivelyDeleteTriviallyDeadInstructions,
RecursivelyDeleteDeadPHINode, and DeleteDeadPHIs return a flag
indicating whether they made any changes.

llvm-svn: 92732
2010-01-05 15:45:31 +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
Chris Lattner
07a1a284d3 remove the random sampling framework, which is not maintained anymore.
If there is interest, it can be resurrected from SVN.  PR4912.

llvm-svn: 92422
2010-01-02 20:07:03 +00:00
Chris Lattner
41047d373d comment fix: weakvh -> tracking vh
llvm-svn: 91867
2009-12-22 00:51:57 +00:00
Dan Gohman
4e04fb5ca8 Eliminate unnecessary LLVMContexts.
llvm-svn: 91729
2009-12-18 23:42:08 +00:00