llvm-svn: 350275

This is an alternate patch for the bug reported in
https://bugs.llvm.org/show_bug.cgi?id=39816 ("lldb doesn't show a file
of line entry for big project"). This limits the number of lines in a
source file to 32M, which I think is reasonable even for preprocessed
source inputs.

Differential Revision: https://reviews.llvm.org/D56218

llvm-svn: 350274

llvm-svn: 350273

The peephole pass isn't always able to fold the load because it can't commute the implicit usage of AL/AX/EAX/RAX.

llvm-svn: 350272

[X86] Add test cases to show that we fail to fold loads into i8 smulo and i8/i16/i32/i64 umulo lowering without the assistance of the peephole pass. NFC

llvm-svn: 350271

Summary:
This was previously ignored and an incorrect value generated.

Also fixed Disassembler's handling of block_type.

Reviewers: dschuff, aheejin

Subscribers: sbc100, jgravelle-google, sunfish, llvm-commits

Differential Revision: https://reviews.llvm.org/D56092

llvm-svn: 350270

Summary:
Alias can make one (but not all) live, we still need to scan all others if this symbol is reachable
from somewhere else.

Reviewers: tejohnson, grimar

Subscribers: mehdi_amini, inglorion, eraman, steven_wu, dexonsmith, llvm-commits

Differential Revision: https://reviews.llvm.org/D56117

llvm-svn: 350269

Removes some unneeded includes from the driver.

llvm-svn: 350267

llvm-svn: 350266

shl by 32 is undefined. This was intended to be a shl by 31 as part
of a rotate sequence.

llvm-svn: 350265

llvm-svn: 350264

It doesn't like this std::tie() for some reason, hopefuly this
fixes it.

llvm-svn: 350262

The caller to EraseInstruction had this conditional:

    // ARC calls with null are no-ops. Delete them.
    if (IsNullOrUndef(Arg))

but the assert inside EraseInstruction only allowed ConstantPointerNull and not
undef or bitcasts.

This adds support for both of these cases.

rdar://problem/47003805

llvm-svn: 350261

llvm-svn: 350260

llvm-svn: 350259

Summary:
@synchronized semantics can be synthesized by using existing mutex_[un]lock operations.

```
@synchronized(obj) {
  // ...
}

=> 
{
  mutex_lock(obj);
  // ...
  mutex_unlock(obj);
}
```
Let me know whether you think this a good idea.

Reviewers: dcoughlin, dvyukov, kubamracek, delcypher

Reviewed By: dvyukov

Subscribers: llvm-commits, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D55959

llvm-svn: 350258

If an instruction has no demanded bits, remove it directly during BDCE,
instead of leaving it for something else to clean up.

Differential Revision: https://reviews.llvm.org/D56185

llvm-svn: 350257

llvm-svn: 350256

llvm-svn: 350255

Differential Revision: https://reviews.llvm.org/D56108

llvm-svn: 350254

Since NetBSD uses ELF linker, enable the relevant feature.  It's not
currently used for anything, though.

llvm-svn: 350253

[OpenMP] Added support for explicit mapping of classes using 'this' pointer. Differential revision: https://reviews.llvm.org/D55982

llvm-svn: 350252

Fixes https://bugs.llvm.org/show_bug.cgi?id=40134

addWrappedSymbols() must be called before addReservedSymbols() because the
latter only defines reserved symbols when they are undefined in the symbol
table. If addWrappedSymbols() is called after, then addUndefined() is called
which may lazily pull in more object files that could reference reserved
symbols.

Differential Revision: https://reviews.llvm.org/D56110

llvm-svn: 350251

Differential Revision: https://reviews.llvm.org/D56186

llvm-svn: 350250

- arc4random_stir / arc4random_addrandom had been made obsolete (and removed) from FreeBSD 12.

Reviewers: krytarowski

Reviewed By: krytarowski

Differential Revision: https://reviews.llvm.org/D56210

llvm-svn: 350249

Reviewers: krytarowski

Reviewed By: krytarowski

Differential Revision: https://reviews.llvm.org/D56209

llvm-svn: 350248

TestQueues is failing randomly on green dragon and I suspect it is
because the enqueued threads haven't executed by the time we expect
them. This patch adds file-based synchronization to the queues.

Differential Revision: https://reviews.llvm.org/D56208

llvm-svn: 350247

llvm-svn: 350246

INC/DEC are pretty much the same as ADD/SUB except that they don't update the C flag.

This patch removes the special nodes and just pattern matches from ADD/SUB during isel if the C flag isn't being used.

I had to avoid selecting DEC is the result isn't used. This will become a SUB immediate which will turned into a CMP later by optimizeCompareInstr. This lead to the one test change where we use a CMP instead of a DEC for an overflow intrinsic since we only checked the flag.

This also exposed a hole in our RMW flag matching use of hasNoCarryFlagUses. Our root node for the match is a store and there's no guarantee that all the flag users have been selected yet. So hasNoCarryFlagUses needs to check copyToReg and machine opcodes, but it also needs to check for the pre-match SETCC, SETCC_CARRY, BRCOND, and CMOV opcodes.

Differential Revision: https://reviews.llvm.org/D55975

llvm-svn: 350245

try_emplace is C++17.

llvm-svn: 350244

This is a first step towards getting lldb-test symbols working
with the native plugin.  There is a remaining issue, which is
that the plugin expects that ParseDeclsForContext will also
create lldb symbols rather than just the decls, but the native
pdb plugin doesn't currently do this.  This will be addressed
in a followup patch.

llvm-svn: 350243

A Previous patch added support for creating VarDecls for global
variables.  This patch updates this test to be more strict and
actually check these, not just the types.

llvm-svn: 350242

Sometimes it's useful to be able to output demangled names without
tag specifiers like "struct", "class", etc.  This patch adds a
flag enabling this.

llvm-svn: 350241

There were several problems preventing this from working.  The
first is that when the PDB had an absolute path to the main
source file, we would construct an invalid path by prepending the
compilation directory to it anyway.  So we needed to check if the
path is already absolute first.

Second, LLDB assumes that the zero'th item in the support file list
is the main compilation unit.  We were respecting this requirement,
but LLDB *also* requires that file to appear somewhere in the list
starting from index 1 as well.  So the main compilation file should
appear in the support file list twice.  And when parsing a line
table, it expects the LineEntry records to be constructed using
the 1-based index.  With these two fixes we can now set breakpoints
by file and line using the native PDB reader.

llvm-svn: 350240

[DAGCombiner] After performing the division by constant optimization for a DIV or REM node, replace the users of the corresponding REM or DIV node if it exists.

Currently we expand the two nodes separately. This gives DAG combiner an opportunity to optimize the expanded sequence taking into account only one set of users. When we expand the other node we'll create the expansion again, but might not be able to optimize it the same way. So the nodes won't CSE and we'll have two similarish sequences in the same basic block. By expanding both nodes at the same time we'll avoid prematurely optimizing the expansion until both the division and remainder have been replaced.

Improves the test case from PR38217. There may be additional opportunities after this.

Differential Revision: https://reviews.llvm.org/D56145

llvm-svn: 350239

Also add a fuzzer() template for defining fuzzers that's similar to
add_llvm_fuzzer in the CMake build, and a build file for dependency
llvm/lib/FuzzMutate.

Also make `assert(defined(...` error strings a bit more self-consistent.

Differential Revision: https://reviews.llvm.org/D56194

llvm-svn: 350238

Adding MC regressions tests to cover the XOP isa set.
This patch is part of a larger task to cover MC encoding of all X86 isa sets started in revision: https://reviews.llvm.org/D39952

Differential Revision: https://reviews.llvm.org/D41392

llvm-svn: 350237

[LegalizeIntegerTypes] When promoting the result of an extract_vector_elt also promote the input type if necessary

By also promoting the input type we get a better idea for what scalar type to use. This can provide better results if the result of the extract is sign extended. What was previously happening is that the extract result would be legalized, sometime later the input of the sign extend would be legalized using the result of the extract. Then later the extract input would be legalized forcing a truncate into the input of the sign extend using a replace all uses. This requires DAG combine to combine out the sext/truncate pair. But sometimes we visited the truncate first and messed things up before the sext could be combined.

By creating the extract with the correct scalar type when we create legalize the result type, the truncate will be added right away. Then when the sign_extend input is legalized it will create an any_extend of the truncate which can be optimized by getNode to maybe remove the truncate. And then a sign_extend_inreg. Now DAG combine doesn't have to worry about getting rid of the extend.

This fixes the regression on X86 in D56156.

Differential Revision: https://reviews.llvm.org/D56176

llvm-svn: 350236

[DAGCombiner][X86][PowerPC] Teach visitSIGN_EXTEND_INREG to fold (sext_in_reg (aext/sext x)) -> (sext x) when x has more than 1 sign bit and the sext_inreg is from one of them.

If x has multiple sign bits than it doesn't matter which one we extend from so we can sext from x's msb instead.

The X86 setcc-combine.ll changes are a little weird. It appears we ended up with a (sext_inreg (aext (trunc (extractelt)))) after type legalization. The sext_inreg+aext now gets optimized by this combine to leave (sext (trunc (extractelt))). Then we visit the trunc before we visit the sext. This ends up changing the truncate to an extractvectorelt from a bitcasted vector. I have a follow up patch to fix this.

Differential Revision: https://reviews.llvm.org/D56156

llvm-svn: 350235

These two plugins are loaded into a host process that contains all LLVM
symbols, so they don't link against anything. This required minor readjustments
to the tablegen() setup of IR.

Needed for check-llvm.

Differential Revision: https://reviews.llvm.org/D56204

llvm-svn: 350234