llvm-svn: 270936

CriticalAntiDepBreaker was not correctly tracking defs of the high X86 byte
registers, leading to incorrect use of a busy register to break an
antidependence.

Fixes pr27681, and its duplicates pr27580, pr27804.

Differential Revision: http://reviews.llvm.org/D20456

llvm-svn: 270935

llvm-svn: 270934

Differential revision: http://reviews.llvm.org/D20655

llvm-svn: 270933

This just makes it a bit more clear that we don't intend to use a
deleted node for anything here.

llvm-svn: 270931

[libFuzzer] more refactoring around CurrentUnit. Also add a threading test on which we currently have a race (when reporting bugs from multiple threads)

llvm-svn: 270929

This partially fixes the compilation of the LibFuzzer unit test
on OSX using AppleClang.

llvm-svn: 270926

Condition might be simplified to a Constant, but it doesn't have to be
ConstantInt, so we should dyn_cast, instead of cast.

This fixes PR27886.

llvm-svn: 270924

This patch builds upon r270776 and speeds up
LiveDebugValues::transferDebugValue() by adding an index that maps each
DebugVariable to its open VarLoc.

The transferDebugValue() function needs to close all open ranges for a
given DebugVariable. Iterating over the set bits of OpenRanges is
prohibitively slow in practice. I experimented with using the sorted map
of VarLocs in the UniqueVector to iterate only over the range of VarLocs
with a given DebugVariable, but the binary search turned out to be even
more expensive than just iterating over the set bits in OpenRanges.
Instead, this patch exploits the fact that there can only be one open
location for each DebugVariable and redundantly stores this location in a
DenseMap.

This patch brings the time spent in the LiveDebugValues pass down to an
almost neglectiable amount.

http://llvm.org/bugs/show_bug.cgi?id=26055
http://reviews.llvm.org/D20636
rdar://problem/24091200

llvm-svn: 270923

llvm-svn: 270922

Summary: * docs/WritingAnLLVMBackend.rst: Makefiles are no longer used. The users should use CMakeLists.txt. In order to add the target, the TARGETS_TO_BUILD is replaced with LLVM_ALL_TARGETS.

Reviewers: gribozavr, void, beanz

Subscribers: llvm-commits

Patch By: Visoiu Mistrih Francis (thegameg)

Differential Revision: http://reviews.llvm.org/D20700

llvm-svn: 270921

This adds support for YAML round tripping dyld info lazy bindings. The storage and format of these is the same as regular bind opcodes, they are just interpreted differently by dyld, and can have DONE opcodes in the middle of the opcode lists.

llvm-svn: 270920

llvm-svn: 270919

llvm-svn: 270918

tutorial.

llvm-svn: 270917

This enforces idiomatic usage of ECError removing the option to construct them
using make_error.

llvm-svn: 270916

llvm-svn: 270915

llvm-svn: 270914

Previously CMake would successfully configure and compile (with warnings
about ``-fsanitize-coverage=...`` being unused) but the tests LibFuzzer
tests would fail.

Differential Revision: http://reviews.llvm.org/D20662

llvm-svn: 270913

Previously the flags were only being set correctly when the
build type was "Release". Now the build should work properly
for all the supported build types. When building libFuzzer
the optimization level respects whatever is used for the
rest of LLVM but for the LibFuzzer tests we force -O0.

Differential Revision: http://reviews.llvm.org/D20558

llvm-svn: 270912

This adds support for YAML round tripping dyld info weak bindings. The storage and format of these is the same as regular bind opcodes, they are just interpreted differently by dyld.

llvm-svn: 270911

llvm-svn: 270909

Global variables and aliases are emitted eagerly, but there may not be any in
the incoming module. In that case, we can save some memory and compile time by
not building, emitting and tracking an empty globals module.

llvm-svn: 270908

We were creating a weak external that tried to reference a static symbol. That
would always fail to link with link.exe.

We now create an external symbol in the same position as the local and refer
to that. This works with link.exe and matches what gas does.

llvm-svn: 270906

llvm-svn: 270905

crash was due to a stack overflow, chances are good that this would also cause
a stack overflow.

llvm-svn: 270903

llvm-svn: 270902

This adds support for YAML round tripping dyld info bind opcodes. Bind opcodes can have signed or unsigned LEB128 data, and they can have symbols associated with them.

llvm-svn: 270901

[libFuzzer] reimplement the way we do -only_ascii to allow more 'const' in function declarations. Add a test for -only_ascii. NFC intended

llvm-svn: 270900

Symbol resolution should be done on the top layer of the stack unless there's a
good reason to do otherwise. In this case it would have worked because
OptimizeLayer::addModuleSet eagerly passes all modules down to the
CompileLayer, meaning that searches in CompileLayer will find the definitions.
In later chapters where the top layer's addModuleSet isn't a pass-through, this
would break.

llvm-svn: 270899

The aggressive anti-dependency breaker can rename the restored callee-
saved registers. To prevent this, mark these registers are live on all
paths to the return/tail-call instructions, and add implicit use operands
for them to these instructions.

llvm-svn: 270898

Canonicalize (srl (bswap i32 x), 16) to (rotr (bswap i32 x), 16), if the high
16-bits of x are zero. Similarly, canonicalize (srl (bswap i64 x), 32) to
(rotr (bswap i64 x), 32), if the high 32-bits of x are zero.

test_rev_w_srl16:            test_rev_w_srl16:
  and w8, w0, #0xffff          and     w8, w0, #0xffff
  rev w8, w8           --->    rev16   w0, w8
  lsr     w0, w8, #16

test_rev_x_srl32:            test_rev_x_srl32:
  rev x8, x8           --->    rev32   x0, x8
  lsr x0, x8, #32

llvm-svn: 270896

Summary: Enable load-store-opt by default, and update LIT tests.

Reviewers: arsenm

Differential Revision: http://reviews.llvm.org/D20694

llvm-svn: 270894

r270777 improved the precision of alloca vs. inbounbds GEP alias queries: if
we have (a) an inbounds GEP and (b) a pointer based on an alloca, and the
beginning of the object the GEP points to would have a negative offset with
respect to the alloca, then the GEP can not alias pointer (b).

This makes the same logic fire when (b) is based on a GlobalVariable instead
of an alloca.

Differential Revision: http://reviews.llvm.org/D20652

llvm-svn: 270893

An exception could prevent a store from occurring but MemCpyOpt's
callslot optimization would fire anyway, causing the store to occur.

This fixes PR27849.

llvm-svn: 270892

llvm-svn: 270889

This fixes PR27879.

Differential Revision: http://reviews.llvm.org/D20659

llvm-svn: 270888

Require that Hexagon is a registered target.

llvm-svn: 270887

llvm-svn: 270885

It looks like this doesn't get a lot of use.

llvm-svn: 270883