Commit Graph

599 Commits

Author SHA1 Message Date
Owen Anderson
4e282decf3 Revert r114097, adding back in the assertion against replacing an Instruction by itself. Now that CorrelatedValuePropagation is
more careful not to call SimplifyInstructionsInBlock() on an unreachable block, the issue has been fixed at a higher level.  Add
a big warning to SimplifyInstructionsInBlock() to hopefully prevent this in the future.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114117 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-16 20:51:41 +00:00
Duncan Sands
fc6e29d4ab Reapply commit 112699, speculatively reverted by echristo, since
I'm sure it is harmless.  Original commit message:
If PrototypeValue is erased in the middle of using the SSAUpdator
then the SSAUpdator may access freed memory.  Instead, simply pass
in the type and name explicitly, which is all that was used anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112810 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-02 08:14:03 +00:00
Eric Christopher
adc581f5cb Speculatively revert 112699 and 112702, they seem to be causing
self host errors on clang-x86-64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112719 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-01 17:29:10 +00:00
Duncan Sands
4d588bceb0 If PrototypeValue is erased in the middle of using the SSAUpdator
then the SSAUpdator may access freed memory.  Instead, simply pass
in the type and name explicitly, which is all that was used anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112699 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-01 10:29:33 +00:00
Owen Anderson
25e9405272 Rename ValuePropagation to a more descriptive CorrelatedValuePropagation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112591 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-31 07:48:34 +00:00
Chris Lattner
ffd9beefb8 implement SSAUpdater::RewriteUseAfterInsertions, a helpful form of RewriteUse.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112409 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-29 04:54:06 +00:00
Chris Lattner
5f88af5376 remove the ABCD and SSI passes. They don't have any clients that
I'm aware of, aren't maintained, and LVI will be replacing their value.
nlewycky approved this on irc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112355 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-28 03:51:24 +00:00
Owen Anderson
a0b59f6bd2 Add a prototype of a new peephole optimizing pass that uses LazyValue info to simplify PHIs and select's.
This pass addresses the missed optimizations from PR2581 and PR4420.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112325 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-27 23:31:36 +00:00
Dan Gohman
6cb8c23db1 Reapply r112091 and r111922, support for metadata linking, with a
fix: add a flag to MapValue and friends which indicates whether
any module-level mappings are being made. In the common case of
inlining, no module-level mappings are needed, so MapValue doesn't
need to examine non-function-local metadata, which can be very
expensive in the case of a large module with really deep metadata
(e.g. a large C++ program compiled with -g).

This flag is a little awkward; perhaps eventually it can be moved
into the ClonedCodeInfo class.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112190 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26 15:41:53 +00:00
Dan Gohman
b4e3cda118 Rewrite ExtractGV, removing a bunch of stuff that didn't fully work,
and was over-complicated, and replacing it with a simple implementation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112120 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-26 00:22:55 +00:00
Dan Gohman
05ea54e886 Use MapValue in the Linker instead of having a private function
which does the same thing. This eliminates redundant code and
handles MDNodes better. MDNode linking still doesn't fully
work yet though.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111941 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-24 18:50:07 +00:00
Dan Gohman
e2c6d131d1 Teach SimplifyCFG how to simplify indirectbr instructions.
- Eliminate redundant successors.
 - Convert an indirectbr with one successor into a direct branch.

Also, generalize SimplifyCFG to be able to be run on a function entry block.
It knows quite a few simplifications which are applicable to the entry
block, and it only needs a few checks to avoid trouble with the entry block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111060 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-14 00:29:42 +00:00
Dan Gohman
60493c3f4f Eliminate PromoteMemoryToRegisterID; just use addPreserved("mem2reg")
instead, as an example of what this looks like.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110478 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06 21:48:06 +00:00
Owen Anderson
90c579de5a Reapply r110396, with fixes to appease the Linux buildbot gods.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110460 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06 18:33:48 +00:00
Owen Anderson
1f74590e9d Revert r110396 to fix buildbots.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110410 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-06 00:23:35 +00:00
Owen Anderson
9ccaf53ada Don't use PassInfo* as a type identifier for passes. Instead, use the address of the static
ID member as the sole unique type identifier.  Clean up APIs related to this change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110396 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-05 23:42:04 +00:00
Peter Collingbourne
3bababf880 Add an atomic lowering pass
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110113 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-03 16:19:16 +00:00
Rafael Espindola
d720670393 The BlockExtractorPass() constructor was not reading the BlockFile and that was
exactly what bugpoint expected it to do.

There was also only one user of
BlockExtractorPass(const std::vector<BasicBlock*> &B), so just remove it and
make BlockExtractorPass read BlockFile.

This fixes bugpoint's block extraction.

Nick, please review.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109936 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-31 00:32:17 +00:00
Devang Patel
26d14294de Debugging infomration is encoded in llvm IR using metadata. This is designed
such a way that debug info for symbols preserved even if symbols are
optimized away by the optimizer. 

Add new special pass to remove debug info for such symbols.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107416 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-01 19:49:20 +00:00
Devang Patel
e9916a302f Use ValueMap instead of DenseMap.
The ValueMapper used by various cloning utility maps MDNodes also.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106706 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-24 00:33:28 +00:00
Devang Patel
29d3dd8a64 Cosmetic change.
Do not use "ValueMap" as a name for a local variable or an argument.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106698 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-23 23:55:51 +00:00
Benjamin Kramer
386e918438 simplify-libcalls: fold strstr(a, b) == a -> strncmp(a, b, strlen(b)) == 0
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106047 91177308-0d34-0410-b5e6-96231b3b80d8
2010-06-15 21:34:25 +00:00
Dan Gohman
dd9344f3fa Move FindAvailableLoadedValue isSafeToLoadUnconditionally out of
lib/Transforms/Utils and into lib/Analysis so that Analysis passes
can use them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104949 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-28 16:19:17 +00:00
Dan Gohman
28a193ed8b Add an LLVM IR version of code sinking. This uses the same simple algorithm
as MachineSink, but it isn't constrained by MachineInstr-level details.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103257 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-07 15:40:13 +00:00
Bob Wilson
c52edc7d30 Fix handling of unreachable blocks in the SSAUpdater. The previous code only
handled cases where a block had zero predecessors, but failed to detect other
cases like loops with no entries.  The SSAUpdater is already doing a forward
traversal through the blocks, so it is not hard to identify the blocks that
were never reached on that traversal.  This fixes the crash for ppc on the
stepanov_vector test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103184 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-06 16:24:11 +00:00
Bob Wilson
4aad88d1fd Combine the implementations of the core part of the SSAUpdater and
MachineSSAUpdater to avoid duplicating all the code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103060 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-04 23:18:19 +00:00
Chris Lattner
0ca2f28458 rename InlineInfo.DevirtualizedCalls -> InlinedCalls to
reflect that it includes all inlined calls now, not just
devirtualized ones.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102824 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-01 01:26:13 +00:00
Chris Lattner
c6f0aadc3b Fix a problem that lower invoke has with allocas (PR6694), and
add a version of createLowerInvokePass that allows the client
to specify whether it wants "expensive" or "cheap" lowering.

Patch by Alex Mac!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102402 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-26 23:49:32 +00:00
Chris Lattner
076863225c 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102196 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-23 18:37:01 +00:00
Chris Lattner
fe9af3b1f7 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102146 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22 23:37:35 +00:00
Chris Lattner
60915146f4 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102137 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22 23:07:58 +00:00
Devang Patel
cd9b492451 There is no need to install ValueMapper.h header.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101949 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-20 22:18:31 +00:00
Bob Wilson
84bd6b0c31 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101612 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-17 03:08:24 +00:00
Chris Lattner
2decb22222 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101558 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16 22:42:17 +00:00
Owen Anderson
fd64901579 SCCVN, we hardly knew ye!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101117 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13 05:24:08 +00:00
Eric Christopher
71988f1e5b Add support for stpncpy_chk.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100710 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-07 23:00:07 +00:00
Mon P Wang
20adc9dc46 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)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100304 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-04 03:10:48 +00:00
Bob Wilson
49c283fd3f 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100264 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-03 03:50:38 +00:00
Mon P Wang
e754d3fb85 Revert r100191 since it breaks objc in clang
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100199 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-02 18:43:02 +00:00
Mon P Wang
e33c848fa4 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)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100191 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-02 18:04:15 +00:00
Bob Wilson
6f69035970 Rewrite another SSAUpdater function to avoid recursion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100147 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-01 23:05:58 +00:00
Bob Wilson
33f22e8c66 Change another SSAUpdater function to avoid recursion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100131 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-01 20:04:30 +00:00
Bob Wilson
e8b64281ce 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100126 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-01 18:46:59 +00:00
Bob Wilson
a0c6057061 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100047 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-31 20:51:00 +00:00
Bob Wilson
100f090add Revert Mon Ping's change 99928, since it broke all the llvm-gcc buildbots.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99948 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30 22:27:04 +00:00
Mon P Wang
808bab0169 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99928 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30 20:55:56 +00:00
Evan Cheng
a56daf8a39 Add comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99284 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-23 15:50:49 +00:00
Evan Cheng
d826e65ef2 Forgot this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99283 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-23 15:49:37 +00:00
Benjamin Kramer
a30b181c20 Add a virtual destructor and give vtable a home.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98376 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-12 20:41:29 +00:00
Benjamin Kramer
0b6cb50738 Factor checked library call optimization into a common helper class and use it
to unify the almost identical code in CodeGenPrepare and InstCombineCalls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98338 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-12 09:27:41 +00:00