Summary:
1. Remove unused forward declaration.
2. Remove unnecessary `\defgroup` in docygen documentation.

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70218

/align is not supposed to be used without /driver, so it makes sense
to warn if only /align is passed. MSVC link.exe warns on this too.

Differential Revision: https://reviews.llvm.org/D70163

This patch implements /driver, /driver:wdm and /driver:uponly as
described in
https://docs.microsoft.com/en-us/cpp/build/reference/driver-windows-nt-kernel-mode-driver?view=vs-2019.

Differential Revision: https://reviews.llvm.org/D70162

Summary:
This adds `-mreference-types` and `-mno-reference-types` flags to clang
and make `-fwasm-exceptions` enables reference types feature in clang
and the backend.

Reviewers: tlively

Subscribers: dschuff, sbc100, jgravelle-google, sunfish, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D69832

Summary:
After D70211, Pass.h does not include InitializePasses.h anymore, so
these files need to include InitializePasses.h directly.

Reviewers: rnk

Subscribers: MatzeB, mehdi_amini, zzheng, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70217

I noticed that currently we are printing LLVM's pretty stack trace
twice. The reason is that we're calling PrintStackTraceOnErrorSignal in
addition to InitLLVM, which besides some other useful things, also
register LLVM's pretty stack trace handler.

Differential revision: https://reviews.llvm.org/D70216

Avoids the need to include TargetMachine.h from various places just for
an enum. Various other enums live here, such as the optimization level,
TLS model, etc. Data suggests that this change probably doesn't matter,
but it seems nice to have anyway.

Summary:
This makes it look like an elseif and also the variable referenced
in the condition was removed from this function in r366622.

Reviewers: dsanders, beanz, smeenai, compnerd, phosek

Reviewed By: beanz

Subscribers: mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70159

This reverts commit a36f3163.

I did not intend to push this with the InitializePasses.h change.

This file lists every pass in LLVM, and is included by Pass.h, which is
very popular. Every time we add, remove, or rename a pass in LLVM, it
caused lots of recompilation.

I found this fact by looking at this table, which is sorted by the
number of times a file was changed over the last 100,000 git commits
multiplied by the number of object files that depend on it in the
current checkout:
  recompiles    touches affected_files  header
  342380        95      3604    llvm/include/llvm/ADT/STLExtras.h
  314730        234     1345    llvm/include/llvm/InitializePasses.h
  307036        118     2602    llvm/include/llvm/ADT/APInt.h
  213049        59      3611    llvm/include/llvm/Support/MathExtras.h
  170422        47      3626    llvm/include/llvm/Support/Compiler.h
  162225        45      3605    llvm/include/llvm/ADT/Optional.h
  158319        63      2513    llvm/include/llvm/ADT/Triple.h
  140322        39      3598    llvm/include/llvm/ADT/StringRef.h
  137647    ...

WIP stats

This commit removes unused methods from the DataEncoder class and cleans
up the API by making all the internal methods private.

This causes errors when building LLDB because the Windows implementation
doesn't implement this method:

C:\src\llvm-project\lldb\source\Plugins\ScriptInterpreter\Python\ScriptInterpreterPython.cpp(915,19): error: allocating an object of abstract class type 'lldb_private::ConnectionGenericFile'
              new ConnectionGenericFile(read_file, true));
                  ^
C:\src\llvm-project\lldb\include\lldb/Utility/Connection.h(174,28): note: unimplemented pure virtual method 'GetReadObject' in 'ConnectionGenericFile'
  virtual lldb::IOObjectSP GetReadObject() = 0;
                           ^

I made GetReadObject pure virtual in the base class and forgot to add
the method to the mock class.

This method is private and only called from this file and doesn't need
to be inline. Saves a TargetMachine.h include in MachineFunction.h, a
popular header. The include was introduced in 98603a81 despite the
forward decl of LLVMTargetMachine.

No instruction takes mxcsr as a an operand so we should always
treat it as an identifier name.

At this point I'm just fixing issues as I see them pop up locally in
incremental builds.

Instead do custom promotion in the handler so that we can still
allow i16 to be used with fp80. And f64 without sse2.

[X86] Move all the FP_TO_XINT/XINT_TO_FP setOperationActions into the same !useSoftFloat block. Qualify all of the Promote actions for these with !useSoftFloat too. NFCI

The Promote action doesn't apply until LegalizeDAG. By the time
we get there, we would have already softened all the FP operations
if useSoftFloat was true. So there wouldn't be any operation left
to Promote.

This avoids confusing them with fission-related functionality.

I also moved two accessor functions from DWARFDIE into static
functions in DWARFASTParserClang were their only use is located.

Summary:
This temporarily disables the large working set size behavior in profile guided
size optimization due to internal benchmark regressions.

Reviewers: davidxl

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70207

Because that is what this function really does. The old name is
misleading.

This change causes test failures for builds configured with
-DCLANG_DEFAULT_RTLIB=compiler-rt.

This reverts commit 3289352e.

The bug manifests as replacing a reduction operand with an undef
value.

The problem appears to be limited to cases where a min/max reduction
has extra uses of the compare operand to the select.

In the general case, we are tracking "ExternallyUsedValues" and
an "IgnoreList" of the reduction operations, but those may not apply
to the final compare+select in a min/max reduction.

For that, we use replaceAllUsesWith (RAUW) to ensure that the new
vectorized reduction values are transferred to all subsequent users.

Differential Revision: https://reviews.llvm.org/D70148

Summary:
Review comments in {D69854} recommended a simpler approach of creating the SMDiagnostics to remove much of the complexity. (thanks @thakis)

@vlad.tsyrklevich I've rebuilt on both Windows and Linux (running Linux with Address and Undefined sanitizers) over the clang code base

Reviewers: thakis, klimek, mitchell-stellar, vlad.tsyrklevich

Reviewed By: thakis

Subscribers: cfe-commits, thakis, vlad.tsyrklevich

Tags: #clang-format, #clang

Differential Revision: https://reviews.llvm.org/D69921

This broke in 51dcb292, "[lld-link] diagnose undefined symbols
before LTO when possible" (very soon after the 9.0 branch, so
luckily the 9.0 release is unaffected).

The code for loading objects we believe might be needed for autoimport
(loadMinGWAutomaticImports()) does run before the new
reportUnresolvable() function, but it had a condition to only operate
on symbols from regular object files. This condition came from
resolveRemainingUndefines(), but as loadMinGWAutomaticImports() now
has to operate before the LTO, it has to operate on undefineds from
LTO objects as well.

Differential Revision: https://reviews.llvm.org/D70166

Summary:
The option allows to disable specific target library builtin functions,
instead of -disable-simplify-libcalls, which disables all of them.

This is a prerequisite for D70143, which fixes PR43081.

Reviewers: xbolva00, spatel, jdoerfert, efriedma

Reviewed By: efriedma

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D70193

[TargetLowering] Increase the storage size of NumRegistersForVT to allow the type break down for v256i1 and other types to be stored correctly

v256i1 on X86 without avx512 breaks down to 256 i8 values when passed between basic blocks. But the NumRegistersForVT was sized at a byte for each VT. This results in 256 being stored as 0.

This patch enlarges the type to 16 bits and adds an assert to ensure that no information is lost when the entry is stored.

Differential Revision: https://reviews.llvm.org/D70138