Chad Rosier [Wed, 28 Mar 2012 00:35:33 +0000 (00:35 +0000)]
Fix 80-column violation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153556
91177308-0d34-0410-b5e6-
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Akira Hatanaka [Wed, 28 Mar 2012 00:25:01 +0000 (00:25 +0000)]
Fix test case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153555
91177308-0d34-0410-b5e6-
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Akira Hatanaka [Wed, 28 Mar 2012 00:24:17 +0000 (00:24 +0000)]
Turn on post register allocation scheduler.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153554
91177308-0d34-0410-b5e6-
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Akira Hatanaka [Wed, 28 Mar 2012 00:23:33 +0000 (00:23 +0000)]
Sort relocation entries before they are written out to a file. MIPS ABI
imposes a constraint that GOT16 referring to a local symbol or HI16 has to be
followed immediately by a matching LO16 relocation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153553
91177308-0d34-0410-b5e6-
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Akira Hatanaka [Wed, 28 Mar 2012 00:22:50 +0000 (00:22 +0000)]
Emit all directives except for ".cprestore" during asm printing rather than emit
them as machine instructions. Directives ".set noat" and ".set at" are now
emitted only at the beginning and end of a function except in the case where
they are emitted to enclose .cpload with an immediate operand that doesn't fit
in 16-bit field or unaligned load/stores.
Also, make the following changes:
- Remove function isUnalignedLoadStore and use a switch-case statement to
determine whether an instruction is an unaligned load or store.
- Define helper function CreateMCInst which generates an instance of an MCInst
from an opcode and a list of operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153552
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Akira Hatanaka [Wed, 28 Mar 2012 00:21:37 +0000 (00:21 +0000)]
Mark flag neverHasSideEffects of pattern-less instructions that do not have
any side effects.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153551
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Francois Pichet [Tue, 27 Mar 2012 23:52:22 +0000 (23:52 +0000)]
MSVC doesn't like the mixing of declarations and statements in a .c file.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153549
91177308-0d34-0410-b5e6-
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Benjamin Kramer [Tue, 27 Mar 2012 22:42:42 +0000 (22:42 +0000)]
Add a note about a cute little fabs optimization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153543
91177308-0d34-0410-b5e6-
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Benjamin Kramer [Tue, 27 Mar 2012 22:03:19 +0000 (22:03 +0000)]
Add two missed instcombines related to compares with nsw arithmetic.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153542
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Bill Wendling [Tue, 27 Mar 2012 21:17:04 +0000 (21:17 +0000)]
Try to use the CWD if the path to the GCDA output is not available (e.g., the
executable has been moved to another machine). If that's not available
(read-only or something), then exit gracefully.
<rdar://problem/
11111686>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153538
91177308-0d34-0410-b5e6-
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Akira Hatanaka [Tue, 27 Mar 2012 20:35:51 +0000 (20:35 +0000)]
Remove trailing white space.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153536
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Lang Hames [Tue, 27 Mar 2012 19:10:45 +0000 (19:10 +0000)]
Use a SmallVector and linear lookup instead of a DenseSet - SourceMap values
will always be tiny sets, so DenseSet is overkill (SmallSet won't work as we
need iteration support).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153529
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Akira Hatanaka [Tue, 27 Mar 2012 19:08:42 +0000 (19:08 +0000)]
Add member EmitNOAT and its setter and getter functions to class MipsFunctionInfo.
If EmitNOAT is true, directives ".set noat" and ".set at" are emitted at the
beginning and end of a function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153528
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Eric Christopher [Tue, 27 Mar 2012 18:35:57 +0000 (18:35 +0000)]
Add a test for the previous commit. Also, remove two tests that were
testing a) the wrong behavior or b) something that I'm already testing
in the new test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153525
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Eric Christopher [Tue, 27 Mar 2012 18:35:54 +0000 (18:35 +0000)]
Use DW_AT_low_pc for a single entry point into a routine.
Fixes PR10105
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153524
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Chad Rosier [Tue, 27 Mar 2012 17:44:52 +0000 (17:44 +0000)]
Reapply r153423; the original commit was fine. The failing test, distray, had
undefined behavior, which Rafael was kind enough to fix.
Original commit message for r153423:
Use the new range metadata in computeMaskedBits and add a new optimization to
instruction simplify that lets us remove an and when loding a boolean value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153521
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Jakob Stoklund Olesen [Tue, 27 Mar 2012 17:33:52 +0000 (17:33 +0000)]
ARMLoadStoreOptimizer invalidates register liveness.
This pass tries to update kill flags, but there are still many bugs.
Passes after the load/store optimizer don't need accurate liveness, so
don't even try.
<rdar://problem/
11101911>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153519
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Jakob Stoklund Olesen [Tue, 27 Mar 2012 17:17:16 +0000 (17:17 +0000)]
Print SSA and liveness tracking flags in MF::print().
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153518
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Jakob Stoklund Olesen [Tue, 27 Mar 2012 17:06:09 +0000 (17:06 +0000)]
Branch folding may invalidate liveness.
Branch folding can use a register scavenger to update liveness
information when required. Don't do that if liveness information is
already invalid.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153517
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Jakob Stoklund Olesen [Tue, 27 Mar 2012 17:06:06 +0000 (17:06 +0000)]
Invalidate liveness in Thumb2ITBlockPass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153516
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Chris Lattner [Tue, 27 Mar 2012 16:27:21 +0000 (16:27 +0000)]
fix what looks like a real logic bug, found by PVS-Studio (part of PR12357)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153513
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Jakob Stoklund Olesen [Tue, 27 Mar 2012 15:13:58 +0000 (15:13 +0000)]
Add an MRI::tracksLiveness() flag.
Late optimization passes like branch folding and tail duplication can
transform the machine code in a way that makes it expensive to keep the
register liveness information up to date. There is a fuzzy line between
register allocation and late scheduling where the liveness information
degrades.
The MRI::tracksLiveness() flag makes the line clear: While true,
liveness information is accurate, and can be used for register
scavenging. Once the flag is false, liveness information is not
accurate, and can only be used as a hint.
Late passes generally don't need the liveness information, but they will
sometimes use the register scavenger to help update it. The scavenger
enforces strict correctness, and we have to spend a lot of code to
update register liveness that may never be used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153511
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NAKAMURA Takumi [Tue, 27 Mar 2012 11:25:16 +0000 (11:25 +0000)]
llvm/docs/*.html: Fix markups.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153508
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Chandler Carruth [Tue, 27 Mar 2012 10:48:28 +0000 (10:48 +0000)]
Make a seemingly tiny change to the inliner and fix the generated code
size bloat. Unfortunately, I expect this to disable the majority of the
benefit from r152737. I'm hopeful at least that it will fix PR12345. To
explain this requires... quite a bit of backstory I'm afraid.
TL;DR: The change in r152737 actually did The Wrong Thing for
linkonce-odr functions. This change makes it do the right thing. The
benefits we saw were simple luck, not any actual strategy. Benchmark
numbers after a mini-blog-post so that I've written down my thoughts on
why all of this works and doesn't work...
To understand what's going on here, you have to understand how the
"bottom-up" inliner actually works. There are two fundamental modes to
the inliner:
1) Standard fixed-cost bottom-up inlining. This is the mode we usually
think about. It walks from the bottom of the CFG up to the top,
looking at callsites, taking information about the callsite and the
called function and computing th expected cost of inlining into that
callsite. If the cost is under a fixed threshold, it inlines. It's
a touch more complicated than that due to all the bonuses, weights,
etc. Inlining the last callsite to an internal function gets higher
weighth, etc. But essentially, this is the mode of operation.
2) Deferred bottom-up inlining (a term I just made up). This is the
interesting mode for this patch an r152737. Initially, this works
just like mode #1, but once we have the cost of inlining into the
callsite, we don't just compare it with a fixed threshold. First, we
check something else. Let's give some names to the entities at this
point, or we'll end up hopelessly confused. We're considering
inlining a function 'A' into its callsite within a function 'B'. We
want to check whether 'B' has any callers, and whether it might be
inlined into those callers. If so, we also check whether inlining 'A'
into 'B' would block any of the opportunities for inlining 'B' into
its callers. We take the sum of the costs of inlining 'B' into its
callers where that inlining would be blocked by inlining 'A' into
'B', and if that cost is less than the cost of inlining 'A' into 'B',
then we skip inlining 'A' into 'B'.
Now, in order for #2 to make sense, we have to have some confidence that
we will actually have the opportunity to inline 'B' into its callers
when cheaper, *and* that we'll be able to revisit the decision and
inline 'A' into 'B' if that ever becomes the correct tradeoff. This
often isn't true for external functions -- we can see very few of their
callers, and we won't be able to re-consider inlining 'A' into 'B' if
'B' is external when we finally see more callers of 'B'. There are two
cases where we believe this to be true for C/C++ code: functions local
to a translation unit, and functions with an inline definition in every
translation unit which uses them. These are represented as internal
linkage and linkonce-odr (resp.) in LLVM. I enabled this logic for
linkonce-odr in r152737.
Unfortunately, when I did that, I also introduced a subtle bug. There
was an implicit assumption that the last caller of the function within
the TU was the last caller of the function in the program. We want to
bonus the last caller of the function in the program by a huge amount
for inlining because inlining that callsite has very little cost.
Unfortunately, the last caller in the TU of a linkonce-odr function is
*not* the last caller in the program, and so we don't want to apply this
bonus. If we do, we can apply it to one callsite *per-TU*. Because of
the way deferred inlining works, when it sees this bonus applied to one
callsite in the TU for 'B', it decides that inlining 'B' is of the
*utmost* importance just so we can get that final bonus. It then
proceeds to essentially force deferred inlining regardless of the actual
cost tradeoff.
The result? PR12345: code bloat, code bloat, code bloat. Another result
is getting *damn* lucky on a few benchmarks, and the over-inlining
exposing critically important optimizations. I would very much like
a list of benchmarks that regress after this change goes in, with
bitcode before and after. This will help me greatly understand what
opportunities the current cost analysis is missing.
Initial benchmark numbers look very good. WebKit files that exhibited
the worst of PR12345 went from growing to shrinking compared to Clang
with r152737 reverted.
- Bootstrapped Clang is 3% smaller with this change.
- Bootstrapped Clang -O0 over a single-source-file of lib/Lex is 4%
faster with this change.
Please let me know about any other performance impact you see. Thanks to
Nico for reporting and urging me to actually fix, Richard Smith, Duncan
Sands, Manuel Klimek, and Benjamin Kramer for talking through the issues
today.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153506
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Craig Topper [Tue, 27 Mar 2012 07:54:11 +0000 (07:54 +0000)]
Prune some includes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153502
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Craig Topper [Tue, 27 Mar 2012 07:21:54 +0000 (07:21 +0000)]
Remove unnecessary llvm:: qualifications
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153500
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Akira Hatanaka [Tue, 27 Mar 2012 03:13:56 +0000 (03:13 +0000)]
Pass the llvm IR pointer value and offset to the constructor of
MachinePointerInfo when getStore is called to create a node that stores an
argument passed in register to the stack. Without this change, the post RA
scheduler will fail to discover the dependencies between the stores
instructions and the instructions that load from a structure passed by value.
The link to the related discussion is here:
http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-March/048055.html
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153499
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Akira Hatanaka [Tue, 27 Mar 2012 02:55:31 +0000 (02:55 +0000)]
Fix bug in LowerConstantPool.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153498
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Akira Hatanaka [Tue, 27 Mar 2012 02:46:25 +0000 (02:46 +0000)]
Add T9 to the list of live-in registers of the entry basic block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153497
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Akira Hatanaka [Tue, 27 Mar 2012 02:33:05 +0000 (02:33 +0000)]
Retrieve and add the offset of a symbol in applyFixup rather than retrieve and
set it in MipsMCCodeEmitter::getMachineOpValue. Assert in getMachineOpValue if
MachineOperand MO is of an unexpected type.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153494
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Akira Hatanaka [Tue, 27 Mar 2012 02:04:18 +0000 (02:04 +0000)]
Define function MipsGetSymAndOffset which returns a fixup's symbol and the
offset applied to it.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153493
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Evan Cheng [Tue, 27 Mar 2012 01:50:58 +0000 (01:50 +0000)]
Post-ra LICM should take care not to hoist an instruction that would clobber a
register that's read by the preheader terminator.
rdar://
11095580
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153492
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Akira Hatanaka [Tue, 27 Mar 2012 01:50:08 +0000 (01:50 +0000)]
Rewrite computation of Value in adjustFixupValue so that the upper 48-bits are
cleared. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153491
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Lang Hames [Tue, 27 Mar 2012 00:44:47 +0000 (00:44 +0000)]
During MachineCopyPropagation a register may be the source operand of multiple
copies being considered for removal. Make sure to track all of the copies,
rather than just the most recent encountered, by holding a DenseSet instead of
an unsigned in SrcMap.
No test case - couldn't reduce something with a sane size.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153487
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Akira Hatanaka [Tue, 27 Mar 2012 00:40:56 +0000 (00:40 +0000)]
Reserve hardware registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153486
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Evan Cheng [Mon, 26 Mar 2012 23:31:00 +0000 (23:31 +0000)]
ARM has a peephole optimization which looks for a def / use pair. The def
produces a 32-bit immediate which is consumed by the use. It tries to
fold the immediate by breaking it into two parts and fold them into the
immmediate fields of two uses. e.g
movw r2, #40885
movt r3, #46540
add r0, r0, r3
=>
add.w r0, r0, #
3019898880
add.w r0, r0, #
30146560
;
However, this transformation is incorrect if the user produces a flag. e.g.
movw r2, #40885
movt r3, #46540
adds r0, r0, r3
=>
add.w r0, r0, #
3019898880
adds.w r0, r0, #
30146560
Note the adds.w may not set the carry flag even if the original sequence
would.
rdar://
11116189
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153484
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Lang Hames [Mon, 26 Mar 2012 23:07:23 +0000 (23:07 +0000)]
Add a debug option to dump PBQP graphs during register allocation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153483
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Andrew Trick [Mon, 26 Mar 2012 22:33:59 +0000 (22:33 +0000)]
SCEV fix: Handle loop invariant loads.
Fixes PR11882: NULL dereference in ComputeLoadConstantCompareExitLimit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153480
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Bill Wendling [Mon, 26 Mar 2012 22:15:12 +0000 (22:15 +0000)]
Add 'undef's to make SWIG happier. Patch by Baozeng Ding.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153479
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Eric Christopher [Mon, 26 Mar 2012 21:56:56 +0000 (21:56 +0000)]
Add InitializeNativeTargetDisassembler function.
Patch by Ojab.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153476
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Andrew Trick [Mon, 26 Mar 2012 21:45:37 +0000 (21:45 +0000)]
Unit test for PR11950: LSR crash.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153472
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Eric Christopher [Mon, 26 Mar 2012 21:38:38 +0000 (21:38 +0000)]
Use the file in the inlined die rather than the compile unit for
backtrace locations.
Testcase forthcoming, but I wanted to get some testing here.
Should fix:
PR12323
PR12314
rdar://
11091100
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153471
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Nadav Rotem [Mon, 26 Mar 2012 21:00:53 +0000 (21:00 +0000)]
153465 was incorrect. In this code we wanted to check that the pointer operand is of pointer type (and not vector type).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153468
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Sean Callanan [Mon, 26 Mar 2012 20:45:52 +0000 (20:45 +0000)]
Made RuntimeDyldMachO support vanilla i386
relocations. The algorithm is the same as
that for x86_64. Scattered relocations, a
feature present in i386 but not on x86_64,
are not yet supported.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153466
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Nadav Rotem [Mon, 26 Mar 2012 20:39:18 +0000 (20:39 +0000)]
PR12357: The pointer was used before it was checked.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153465
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Andrew Trick [Mon, 26 Mar 2012 20:28:37 +0000 (20:28 +0000)]
LSR ivchain bug fix: corner case with ConstantExpr.
Fixes PR11950.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153463
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Andrew Trick [Mon, 26 Mar 2012 20:28:35 +0000 (20:28 +0000)]
comment typo
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153462
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Chris Lattner [Mon, 26 Mar 2012 19:13:57 +0000 (19:13 +0000)]
eliminate an unneeded branch, part of PR12357
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153458
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Chris Lattner [Mon, 26 Mar 2012 19:11:51 +0000 (19:11 +0000)]
fix a failure path to print the right thing, part of PR12357
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153457
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Eric Christopher [Mon, 26 Mar 2012 19:09:40 +0000 (19:09 +0000)]
Tidy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153456
91177308-0d34-0410-b5e6-
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Eric Christopher [Mon, 26 Mar 2012 19:09:38 +0000 (19:09 +0000)]
Tidy.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153455
91177308-0d34-0410-b5e6-
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Chad Rosier [Mon, 26 Mar 2012 18:07:14 +0000 (18:07 +0000)]
Revert r153423 as this is causing failures on our internal nightly testers.
Original commit message:
Use the new range metadata in computeMaskedBits and add a new optimization to
instruction simplify that lets us remove an and when loading a boolean value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153452
91177308-0d34-0410-b5e6-
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Andrew Trick [Mon, 26 Mar 2012 18:03:16 +0000 (18:03 +0000)]
LSR cleanup: potential bug caught by PVS-Studio.
Thanks Andrey.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153451
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Daniel Dunbar [Mon, 26 Mar 2012 18:01:14 +0000 (18:01 +0000)]
docs/lit: Add some notes on the lit test run output format.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153450
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Kostya Serebryany [Mon, 26 Mar 2012 17:35:03 +0000 (17:35 +0000)]
[tsan] treat vtable pointer updates in a special way (requires tbaa); fix a bug (forgot to return true after instrumenting); make sure the tsan tests are run
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153448
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Benjamin Kramer [Mon, 26 Mar 2012 14:17:26 +0000 (14:17 +0000)]
No need to do an expensive stable sort for a bunch of integers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153438
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Douglas Gregor [Mon, 26 Mar 2012 14:04:17 +0000 (14:04 +0000)]
Add missing include of <new>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153436
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Anton Korobeynikov [Mon, 26 Mar 2012 12:05:51 +0000 (12:05 +0000)]
Fix GetMainExecutable on kFreeBSD.
Patch by Sylvestre Ledru!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153435
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Benjamin Kramer [Mon, 26 Mar 2012 11:16:50 +0000 (11:16 +0000)]
Remove stale CBackend tests.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153433
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Benjamin Kramer [Mon, 26 Mar 2012 11:08:03 +0000 (11:08 +0000)]
TableGen: Don't emit the llvm intrinsic -> gcc builtin table, its only user was the c backend.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153432
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Craig Topper [Mon, 26 Mar 2012 06:58:25 +0000 (06:58 +0000)]
Prune some includes and forward declarations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153429
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Eric Christopher [Mon, 26 Mar 2012 06:10:32 +0000 (06:10 +0000)]
Add a debug statement.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153428
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Eric Christopher [Mon, 26 Mar 2012 02:09:01 +0000 (02:09 +0000)]
Add some fixes to the configure script for isInf and add
--enable-libcpp to projects/sample.
Patch by Dmitri Shubin with additional fixes by me.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153425
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Eric Christopher [Mon, 26 Mar 2012 01:56:34 +0000 (01:56 +0000)]
Update documentation for old api changes.
Fixes PR12050
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153424
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Rafael Espindola [Mon, 26 Mar 2012 01:44:11 +0000 (01:44 +0000)]
Use the new range metadata in computeMaskedBits and add a new optimization to
instruction simplify that lets us remove an and when loding a boolean value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153423
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Craig Topper [Mon, 26 Mar 2012 00:45:15 +0000 (00:45 +0000)]
Prune includes and replace uses of ARMRegisterInfo.h with ARMBaeRegisterInfo.h
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153422
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Craig Topper [Sun, 25 Mar 2012 23:49:58 +0000 (23:49 +0000)]
Replace uses of ARMBaseInstrInfo and ARMTargetMachine with the Base versions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153421
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Chandler Carruth [Sun, 25 Mar 2012 21:28:14 +0000 (21:28 +0000)]
Teach instsimplify how to simplify comparisons of pointers which are
constant-offsets of a common base using the generic GEP-walking logic
I added for computing pointer differences in the same situation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153419
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Chandler Carruth [Sun, 25 Mar 2012 20:43:07 +0000 (20:43 +0000)]
Switch the pointer-difference simplification logic to only work with
inbounds GEPs. This isn't really necessary for simplifying pointer
differences, but I'm planning to re-use the same code to simplify
pointer comparisons where it is necessary. Since real code almost
exclusively uses inbounds GEPs, it doesn't seem worth it to support the
extra complexity of turning it on and off. If anyone would like that
back, feel free to shout. Note that instcombine will still catch any of
these patterns.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153418
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Craig Topper [Sun, 25 Mar 2012 18:10:17 +0000 (18:10 +0000)]
Prune some includes and forward declarations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153415
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Craig Topper [Sun, 25 Mar 2012 18:09:44 +0000 (18:09 +0000)]
Prune some includes and forward declarations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153414
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Eli Bendersky [Sun, 25 Mar 2012 12:43:54 +0000 (12:43 +0000)]
This file is no longer needed (DejaGNU-isms removed from code)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153412
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Rafael Espindola [Sun, 25 Mar 2012 11:14:35 +0000 (11:14 +0000)]
s/restrict/describe/
Thanks Duncan.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153411
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Chandler Carruth [Sun, 25 Mar 2012 10:34:54 +0000 (10:34 +0000)]
Teach the function cloner (and thus the inliner) to simplify PHINodes
aggressively. There are lots of dire warnings about this being expensive
that seem to predate switching to the TrackingVH-based value remapper
that is automatically updated on RAUW. This makes it easy to not just
prune single-entry PHIs, but to fully simplify PHIs, and to recursively
simplify the newly inlined code to propagate PHINode simplifications.
This introduces a bit of a thorny problem though. We may end up
simplifying a branch condition to a constant when we fold PHINodes, and
we would like to nuke any dead blocks resulting from this so that time
isn't wasted continually analyzing them, but this isn't easy. Deleting
basic blocks *after* they are fully cloned and mapped into the new
function currently requires manually updating the value map. The last
piece of the simplification-during-inlining puzzle will require either
switching to WeakVH mappings or some other piece of refactoring. I've
left a FIXME in the testcase about this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153410
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Eli Bendersky [Sun, 25 Mar 2012 09:42:28 +0000 (09:42 +0000)]
Fix lit failure on cmake-clang-x64_64-linux bot, apparently due to its having
a very (*very*) old version of Python (2.4?)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153409
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Eli Bendersky [Sun, 25 Mar 2012 09:02:19 +0000 (09:02 +0000)]
Continue cleanup of LIT, getting rid of the remaining artifacts from dejagnu
* Removed test/lib/llvm.exp - it is no longer needed
* Deleted the dg.exp reading code from test/lit.cfg. There are no dg.exp files
left in the test suite so this code is no longer required. test/lit.cfg is
now much shorter and clearer
* Removed a lot of duplicate code in lit.local.cfg files that need access to
the root configuration, by adding a "root" attribute to the TestingConfig
object. This attribute is dynamically computed to provide the same
information as was previously provided by the custom getRoot functions.
* Documented the config.root attribute in docs/CommandGuide/lit.pod
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153408
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Chandler Carruth [Sun, 25 Mar 2012 04:03:40 +0000 (04:03 +0000)]
Move the instruction simplification of callsite arguments in the inliner
to instead rely on much more generic and powerful instruction
simplification in the function cloner (and thus inliner).
This teaches the pruning function cloner to use instsimplify rather than
just the constant folder to fold values during cloning. This can
simplify a large number of things that constant folding alone cannot
begin to touch. For example, it will realize that 'or' and 'and'
instructions with certain constant operands actually become constants
regardless of what their other operand is. It also can thread back
through the caller to perform simplifications that are only possible by
looking up a few levels. In particular, GEPs and pointer testing tend to
fold much more heavily with this change.
This should (in some cases) have a positive impact on compile times with
optimizations on because the inliner itself will simply avoid cloning
a great deal of code. It already attempted to prune proven-dead code,
but now it will be use the stronger simplifications to prove more code
dead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153403
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Chandler Carruth [Sun, 25 Mar 2012 03:29:25 +0000 (03:29 +0000)]
Add an asserting ValueHandle to the block simplification code which will
fire if anything ever invalidates the assumption of a terminator
instruction being unchanged throughout the routine.
I've convinced myself that the current definition of simplification
precludes such a transformation, so I think getting some asserts
coverage that we don't violate this agreement is sufficient to make this
code safe for the foreseeable future.
Comments to the contrary or other suggestions are of course welcome. =]
The bots are now happy with this code though, so it appears the bug here
has indeed been fixed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153401
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Rafael Espindola [Sat, 24 Mar 2012 23:29:27 +0000 (23:29 +0000)]
Use the isReachableFromEntry method.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153400
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Chandler Carruth [Sat, 24 Mar 2012 23:03:27 +0000 (23:03 +0000)]
Don't form a WeakVH around the sentinel node in the instructions BB
list. This is a bad idea. ;] I'm hopeful this is the bug that's showing
up with the MSVC bots, but we'll see.
It is definitely unnecessary. InstSimplify won't do anything to
a terminator instruction, we don't need to even include it in the
iteration range. We can also skip the now dead terminator check,
although I've made it an assert to help document that this is an
important invariant.
I'm still a bit queasy about this because there is an implicit
assumption that the terminator instruction cannot be RAUW'ed by the
simplification code. While that appears to be true at the moment, I see
no guarantee that would ensure it remains true in the future. I'm
looking at the cleanest way to solve that...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153399
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Rafael Espindola [Sat, 24 Mar 2012 22:52:25 +0000 (22:52 +0000)]
Avoid using dominatedBySlowTreeWalk.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153398
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Chandler Carruth [Sat, 24 Mar 2012 22:34:26 +0000 (22:34 +0000)]
Try to harden the recursive simplification still further. This is again
spotted by inspection, and I've crafted no test case that triggers it on
my machine, but some of the windows builders are hitting what looks like
memory corruption, so *something* is amiss here.
This patch takes a more generalized approach to eliminating
double-visits. Imagine code such as:
%x = ...
%y = add %x, 1
%z = add %x, %y
You can imagine that if we simplify %x, we would add %y and %z to the
list. If the use-chain order happens to cause us to add them in reverse
order, we could pull %y off first, and simplify it, adding %z to the
list. We now have %z on the list twice, and will reference it after it
is deleted.
Currently, all my test cases happen to not trigger this, likely due to
the use-chain ordering, but there seems no guarantee that such
a situation could not occur, so we should handle it correctly.
Again, if anyone knows how to craft a testcase that actually triggers
this, please let me know.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153397
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Chandler Carruth [Sat, 24 Mar 2012 22:34:23 +0000 (22:34 +0000)]
Don't add the instruction about to be RAUW'ed and erased to the
worklist. This can happen in theory when an instruction uses itself,
such as a PHI node. This was spotted by inspection, and unfortunately
I've not been able to come up with a test case that would trigger it. If
anyone has ideas, let me know...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153396
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Jean-Daniel Dupas [Sat, 24 Mar 2012 22:17:50 +0000 (22:17 +0000)]
Fix null to integer conversion warnings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153395
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Chandler Carruth [Sat, 24 Mar 2012 21:24:19 +0000 (21:24 +0000)]
FileCheck-ize this test. Note the FIXME I've introduced here: we've
regressed seriously here, we are no longer removing allocas during
inline cleanup. This appears to be because of lifetime markers "using"
them. =/ I'll look into this shortly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153394
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Chandler Carruth [Sat, 24 Mar 2012 21:11:24 +0000 (21:11 +0000)]
Refactor the interface to recursively simplifying instructions to be tad
bit simpler by handling a common case explicitly.
Also, refactor the implementation to use a worklist based walk of the
recursive users, rather than trying to use value handles to detect and
recover from RAUWs during the recursive descent. This fixes a very
subtle bug in the previous implementation where degenerate control flow
structures could cause mutually recursive instructions (PHI nodes) to
collapse in just such a way that From became equal to To after some
amount of recursion. At that point, we hit the inf-loop that the assert
at the top attempted to guard against. This problem is defined away when
not using value handles in this manner. There are lots of comments
claiming that the WeakVH will protect against just this sort of error,
but they're not accurate about the actual implementation of WeakVHs,
which do still track RAUWs.
I don't have any test case for the bug this fixes because it requires
running the recursive simplification on unreachable phi nodes. I've no
way to either run this or easily write an input that triggers it. It was
found when using instruction simplification inside the inliner when
running over the nightly test-suite.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153393
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Rafael Espindola [Sat, 24 Mar 2012 20:02:25 +0000 (20:02 +0000)]
Remove always true variable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153392
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Rafael Espindola [Sat, 24 Mar 2012 19:02:32 +0000 (19:02 +0000)]
Add a small release not about the range metadata.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153391
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Hal Finkel [Sat, 24 Mar 2012 03:53:55 +0000 (03:53 +0000)]
Fix small-integer VAARG on SVR4 ABI PPC64.
The PPC64 SVR4 ABI requires integer stack arguments, and thus the var. args., that
are smaller than 64 bits be zero extended to 64 bits.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153373
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Hal Finkel [Sat, 24 Mar 2012 03:53:52 +0000 (03:53 +0000)]
Add the ability to promote legal integer VAARGs. This is required for the PPC64 SVR4 ABI.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153372
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Francois Pichet [Sat, 24 Mar 2012 01:36:37 +0000 (01:36 +0000)]
Fix the MSVC build.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153366
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Justin Holewinski [Sat, 24 Mar 2012 01:23:20 +0000 (01:23 +0000)]
PTX: Fix predicate logic bug
Code such as:
%vreg100 = setcc %vreg10, -1, SETNE
brcond %vreg10, %tgt
was being incorrectly morphed into
%vreg100 = and %vreg10, 1
brcond %vreg10, %tgt
where the 'and' instruction could be eliminated since
such logic is on 1-bit types in the PTX back-end, leaving
us with just:
brcond %vreg10, %tgt
which essentially gives us inverted branch conditions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153364
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Andrew Trick [Sat, 24 Mar 2012 00:51:17 +0000 (00:51 +0000)]
More IndVarSimplify cleanup.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153362
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Rafael Espindola [Sat, 24 Mar 2012 00:14:51 +0000 (00:14 +0000)]
First part of PR12251. Add documentation and verifier support for the range
metadata.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153359
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Kostya Serebryany [Fri, 23 Mar 2012 23:22:59 +0000 (23:22 +0000)]
add EP_OptimizerLast extension point
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153353
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Bill Wendling [Fri, 23 Mar 2012 23:17:38 +0000 (23:17 +0000)]
It's possible for two types, which are isomorphic, to be added to the
destination module, but one of them isn't used in the destination module. If
another module comes along and the uses the unused type, there could be type
conflicts when the modules are finally linked together. (This happened when
building LLVM.)
The test that was reduced is:
Module A:
%Z = type { %A }
%A = type { %B.1, [7 x x86_fp80] }
%B.1 = type { %C }
%C = type { i8* }
declare void @func_x(%C*, i64, i64)
declare void @func_z(%Z* nocapture)
Module B:
%B = type { %C.1 }
%C.1 = type { i8* }
%A.2 = type { %B.3, [5 x x86_fp80] }
%B.3 = type { %C.1 }
define void @func_z() {
%x = alloca %A.2, align 16
%y = getelementptr inbounds %A.2* %x, i64 0, i32 0, i32 0
call void @func_x(%C.1* %y, i64 37, i64 927) nounwind
ret void
}
declare void @func_x(%C.1*, i64, i64)
declare void @func_y(%B* nocapture)
(Unfortunately, this test doesn't fail under llvm-link, only during an LTO
linking.) The '%C' and '%C.1' clash. The destination module gets the '%C'
declaration. When merging Module B, it looks at the '%C.1' subtype of the '%B'
structure. It adds that in, because that's cool. And when '%B.3' is processed,
it uses the '%C.1'. But the '%B' has used '%C' and we prefer to use '%C'. So the
'@func_x' type is changed to 'void (%C*, i64, i64)', but the type of '%x' in
'@func_z' remains '%A.2'. The GEP resolves to a '%C.1', which conflicts with the
'@func_x' signature.
We can resolve this situation by making sure that the type is used in the
destination before saying that it should be used in the module being merged in.
With this fix, LLVM and Clang both compile under LTO.
<rdar://problem/
10913281>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153351
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Jim Grosbach [Fri, 23 Mar 2012 23:07:03 +0000 (23:07 +0000)]
ARM tidy up ARMConstantIsland.cpp.
No functional change, just tidy up the code and nomenclature a bit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153347
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Jim Grosbach [Fri, 23 Mar 2012 23:06:47 +0000 (23:06 +0000)]
Pretty-printing comments for literal floating point in .s files.
Dump the hex representation to the comment stream as well as the float
value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153346
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Akira Hatanaka [Fri, 23 Mar 2012 23:06:45 +0000 (23:06 +0000)]
Add a hook in MCELFObjectTargetWriter to allow targets to sort relocation
entries in the relocation table before they are written out to the file.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153345
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Dan Gohman [Fri, 23 Mar 2012 18:09:00 +0000 (18:09 +0000)]
Don't convert objc_retainAutoreleasedReturnValue to objc_retain if it
is retaining the return value of an invoke that it immediately follows.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153344
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