trace its behavior.

llvm-svn: 292756

logging pass and analyses information.

This is particularly useful when filtering the debug log for
a particular function or loop where something got inappropriately
cached.

llvm-svn: 292755

I noticed that this function got called twice in compiled code to create succ_begin and succ_end iterators. Adding this directive helps the compiler share the call.

Ideally we'd just make this method available for inlining since its quite simple, but the current header file arrangements don't allow that.

llvm-svn: 292754

[IR] Use const_cast to reuse the const version of two BasicBlock methods that are duplicated for both const and non-const. NFC

Similar is already done for other methods in BasicBlock.

llvm-svn: 292753

llvm-svn: 292752

Differential Revision: https://reviews.llvm.org/D28439

llvm-svn: 292749

We need to set BINARY_DIR to: ${CMAKE_BINARY_DIR}/lib/Fuzzer/test , so the dll
is placed in the same directory than the test LLVMFuzzer-DSOTest, and is found
when executing that test.
As we are using CMAKE_CXX_CREATE_SHARED_LIBRARY to link the dll, we can't modify
the output directory for the import library. It will be created in the same
directory than the dll (in BINARY_DIR), no matter which value we set to
LIBRARY_DIR. So, if we set LIBRARY_DIR to a different directory than BINARY_DIR,
when linking LLVMFuzzer-DSOTest, cmake will look for the import library
LLVMFuzzer-DSO1.lib in LIBRARY_DIR, and won't find it, since it was created in
BINARY_DIR. So, for Windows, we need that LIBRARY_DIR and BINARY_DIR are the
same directory.

Differential Revision: https://reviews.llvm.org/D27870

llvm-svn: 292748

Don't check for InFuzzingThread() on Windows, since the AlarmHandler() is
always executed by a different thread from a thread pool.
If we don't add these changes, the alarm handler will never execute.
Note that we decided to ignore possible problem in the synchronization.

Differential Revision: https://reviews.llvm.org/D28723

llvm-svn: 292746

Differential Revision: https://reviews.llvm.org/D28709

llvm-svn: 292745

I add 2 changes to make the tests work on 32 bits and on 64 bits.
I change the size allocated to 0x20000000 and add the flag: -rss_limit_mb=300.
Otherwise the output for 32 bits and 64 bits is different.
For 64 bits the value 0xff000000 doesn't exceed kMaxAllowedMallocSize.
For 32 bits, kMaxAllowedMallocSize is set to 0xc0000000, so the call to
Allocate() will fail earlier printing "WARNING: AddressSanitizer failed to
allocate ..." , and wont't call malloc hooks.
So, we need to consider a size smaller than 2GB (so malloc doesn't fail on
32bits) and greater that the value provided by -rss_limit_mb.
Because of that I use: 0x20000000.

Differential Revision: https://reviews.llvm.org/D28706

llvm-svn: 292744

Fix libFuzzer when setting -close_fd_mask to a non-zero value.
In previous implementation, libFuzzer closes the file descriptors for
stdout/stderr. This has some disavantages:

For `fuzzer-fdmask.test`, we write directly to stdout and stderr using the
file streams stdout and stderr, after the file descriptors are closed, which is
undefined behavior. In Windows, in particular, this was making the test fail.

Also, if we close stdout and we open a new file in libFuzzer, we get the file
descriptor 1, which could generate problem if some code assumes file descriptors
refers to stdout and works directly writing to the file descriptor 1, but it
will be writing to the opened file (for example using std::cout).

Instead of closing the file descriptors, I redirect the output to /dev/null on
linux and nul on Windows.

Differential Revision: https://reviews.llvm.org/D28718

llvm-svn: 292743

This changes is necessary on Windows, where libraries doesn't include the prefix
"lib".

Differential Revision: https://reviews.llvm.org/D28710

llvm-svn: 292742

Update `ListFilesInDirRecursive` implementation on Windows to have the same
behavior than for Posix, when the directory doesn't exists and when it is empty.

Differential Revision: https://reviews.llvm.org/D28711

llvm-svn: 292741

Differential Revision: https://reviews.llvm.org/D28636

llvm-svn: 292740

Instead of directly using objdump, which is not present on Windows, we consider
different tools depending on the platform.
For Windows, we consider dumpbin and llvm-objdump.

Differential Revision: https://reviews.llvm.org/D28635

llvm-svn: 292739

For Posix systems and Windows, we need to consider different cases.

Differential Revision: https://reviews.llvm.org/D28633

llvm-svn: 292738

We need to build all the tests with -O0, otherwise optimizations may merge some
basic blocks and the tests will fail.
In this diff, I simplify the cmake implementation and I remove the flags for
Windows too (/O[123s]).

Differential Revision: https://reviews.llvm.org/D28632

llvm-svn: 292737

We need to expose Sanitizer Coverage's functions that are rewritten with a
different implementation, so compiler-rt's libraries have access to it.

Differential Revision: https://reviews.llvm.org/D28618

llvm-svn: 292736

Remove dependency on FileCheck, sancov and not for tests on Windows.
If LLVM_USE_SANITIZER=Address and LLVM_USE_SANITIZE_COVERAGE=YES, this will
trigger the building of dependencies with sanitizer instrumentation.
This will fail in Windows, since cmake will use link.exe for linking and won't
include compiler-rt libraries.

Differential Revision: https://reviews.llvm.org/D27993

llvm-svn: 292735

On Windows, we don't have interoperability between libFuzzer and afl.

Differential Revision: https://reviews.llvm.org/D28355

llvm-svn: 292734

llvm-svn: 292733

Summary:
This test had a bug: !llvm.invariant.group instead
of !invariant.group.

Also add some new test for future development.
All tests passes, when MSSA will support invariant.group
only the lines with FIXIT should be changed.

Reviewers: dberlin, george.burgess.iv

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D28969

llvm-svn: 292730

We may be able to assert that no shl-shl or lshr-lshr pairs ever get here
because we should have already handled those in foldShiftedShift().

llvm-svn: 292726

This is similar to what the caller (matchSelectPattern()) does. In all
cases where we succeed in matching a min/max pattern, the values in
that pattern will be the values of the 'select', so hoist that and
remove a bunch of duplicated code.

llvm-svn: 292725

llvm-svn: 292724

This can be used to free handler resources for handlers that won't be called
again.

llvm-svn: 292714

Fixes PR31714.

llvm-svn: 292713

llvm-svn: 292712

This is fixing a clang crash when running `clang -flto=thin -save-temps`

llvm-svn: 292711

the library routine shared with the new PM and other code.

This assert checks that when LCSSA preservation is requested we start in
LCSSA form. Without this early assert, given *very* complex test cases
we can hit an assert or crash much later on when trying to preserve
LCSSA.

The new PM's loop simplify doesn't need to (and indeed can't) preserve
LCSSA as the new PM doesn't deal in transforms in the dependency graph.
But we asked the library to and shockingly, this didn't work very well!
Stop doing that. Now the assert will tell us immediately with existing
test cases. Before this, it took a pretty convoluted input to trigger
this.

However, sinking the assert also found a bug in LoopUnroll where we
asked simplifyLoop to preserve LCSSA *right before we reform it*. That's
kinda silly and unsurprising that it wasn't available. =D Stop doing
that too.

We also would assert that the unrolled loop was in LCSSA even if
preserving LCSSA was never requested! I don't have a test case or
anything here. I spotted it by inspection and it seems quite obvious. No
logic change anyways, that's just avoiding a spurrious assert.

llvm-svn: 292710

This adds the last remaining core feature of the loop pass pipeline in
the new PM and removes the last of the really egregious hacks in the
LICM tests.

Sadly, this requires really substantial changes in the unittests in
order to provide and maintain simplified loops. This is particularly
hard because for example LoopSimplify will try to fold undef branches to
an ideal direction and simplify the loop accordingly.

Differential Revision: https://reviews.llvm.org/D28766

llvm-svn: 292709

Fix the -Werror build by removing the unnecessary default case in the
covered switch.  NFC

llvm-svn: 292708

Allow printing the file content offset via the `-t` or `--radix` option.

llvm-svn: 292707

This is a stub implementation of the `-s` or `--format` option that
allows the user to specify the demangling style.  Since we only support
the Itanium (GNU) style demangling, auto is synonymous with `gnu`.
Simply swallow the option to permit some level of commandline
compatibility.

llvm-svn: 292706

Re-Commit r292543 with a fix for the situation when the chain end is
MBB.end().

This function can be used to accumulate the set of all read and modified
register in a sequence of instructions.

Use this code in AArch64A57FPLoadBalancing::scavengeRegister() to prove
the concept.

- The AArch64A57LoadBalancing code is using a backwards analysis now
  which is irrespective of kill flags. This is the main motivation for
  this change.

Differential Revision: http://reviews.llvm.org/D22082

llvm-svn: 292705

llvm-svn: 292704

llvm-svn: 292703

Summary:
Under option -mergefunc-preserve-debug-info we:
- Do not create a new function for a thunk.
- Retain the debug info for a thunk's parameters (and associated
  instructions for the debug info) from the entry block.
  Note: -debug will display the algorithm at work.
- Create debug-info for the call (to the shared implementation) made by
  a thunk and its return value.
- Erase the rest of the function, retaining the (minimally sized) entry
  block to create a thunk.
- Preserve a thunk's call site to point to the thunk even when both occur
  within the same translation unit, to aid debugability. Note that this
  behaviour differs from the underlying -mergefunc implementation which
  modifies the thunk's call site to point to the shared implementation
  when both occur within the same translation unit.

Reviewers: echristo, eeckstein, dblaikie, aprantl, friss

Reviewed By: aprantl

Subscribers: davide, fhahn, jfb, mehdi_amini, llvm-commits

Differential Revision: https://reviews.llvm.org/D28075

llvm-svn: 292702

This depended on libm's errno behavior (we constant fold iff libm's
sqrt(-2) does not set errno) and was breaking on mac.

llvm-svn: 292701

llvm-svn: 292700