[llvm][TargetParser] Return StringMap from getHostCPUFeatures (#97824)

Previously this took a reference to a map and returned a bool to say
whether it succeeded. We can return a StringMap instead,

[llvm][TargetParser] Return StringMap from getHostCPUFeatures (#97824)

Previously this took a reference to a map and returned a bool to say
whether it succeeded. We can return a StringMap instead, as all callers
but 1 simply iterated the map if the bool was true, and passed in empty
maps as the starting point.

lldb's lit-cpuid did specifically check whether the call failed, but due
to the way the x86 routines work this works out the same as checking if
the returned map is empty.

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Fix a warning: default label in switch which covers all enumeration values (NFC)

[llvm-c] Improve TargetMachine bindings (#70806)

This PR exposes four APIs to C/OCaml bindings for `TargetMachine`:
```
/** Enable fast-path instruction selection. */
void LLVMSetTargetMachineFas

[llvm-c] Improve TargetMachine bindings (#70806)

This PR exposes four APIs to C/OCaml bindings for `TargetMachine`:
```
/** Enable fast-path instruction selection. */
void LLVMSetTargetMachineFastISel(LLVMTargetMachineRef T, LLVMBool Enable);

/** Enable global instruction selection. */
void LLVMSetTargetMachineGlobalISel(LLVMTargetMachineRef T, LLVMBool Enable);

/** Set abort behaviour when global instruction selection fails to lower/select
* an instruction. */
void LLVMSetTargetMachineGlobalISelAbort(LLVMTargetMachineRef T,
LLVMGlobalISelAbortMode Mode);

/** Enable the MachineOutliner pass. */
void LLVMSetTargetMachineMachineOutliner(LLVMTargetMachineRef T,
LLVMBool Enable);
```

Fixes #70666.

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[LLVM-C] Add LLVMCreateTargetMachineWithABI (#68406)

The ABI parameter is used by a number of common backends, including ARM,
MIPS, PPC, and RISCV. Exposing it via the C API makes it possible for

[LLVM-C] Add LLVMCreateTargetMachineWithABI (#68406)

The ABI parameter is used by a number of common backends, including ARM,
MIPS, PPC, and RISCV. Exposing it via the C API makes it possible for
users of those backends to configure the ABI without custom bindings.

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[NFC][CodeGen] Change CodeGenOpt::Level/CodeGenFileType into enum classes (#66295)

This will make it easy for callers to see issues with and fix up calls
to createTargetMachine after a future chang

[NFC][CodeGen] Change CodeGenOpt::Level/CodeGenFileType into enum classes (#66295)

This will make it easy for callers to see issues with and fix up calls
to createTargetMachine after a future change to the params of
TargetMachine.

This matches other nearby enums.

For downstream users, this should be a fairly straightforward
replacement,
e.g. s/CodeGenOpt::Aggressive/CodeGenOptLevel::Aggressive
or s/CGFT_/CodeGenFileType::

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Move SubtargetFeature.h from MC to TargetParser

SubtargetFeature.h is currently part of MC while it doesn't depend on
anything in MC. Since some LLVM components might have the need to work
with targ

Move SubtargetFeature.h from MC to TargetParser

SubtargetFeature.h is currently part of MC while it doesn't depend on
anything in MC. Since some LLVM components might have the need to work
with target features without necessarily needing MC, it might be
worthwhile to move SubtargetFeature.h to a different location. This will
reduce the dependencies of said components.

Note that I choose TargetParser as the destination because that's where
Triple lives and SubtargetFeatures feels related to that.

This issues came up during a JITLink review (D149522). JITLink would
like to avoid a dependency on MC while still needing to store target
features.

Reviewed By: MaskRay, arsenm

Differential Revision: https://reviews.llvm.org/D150549

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[NFC][TargetParser] Replace uses of llvm/Support/Host.h

The forwarding header is left in place because of its use in
`polly/lib/External/isl/interface/extract_interface.cc`, but I have
added a GCC w

[NFC][TargetParser] Replace uses of llvm/Support/Host.h

The forwarding header is left in place because of its use in
`polly/lib/External/isl/interface/extract_interface.cc`, but I have
added a GCC warning about the fact it is deprecated, because it is used
in `isl` from where it is included by Polly.

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Iterate over StringMaps using structured bindings. NFCI.

CodeGen/CommandFlags: Convert Optional to std::optional

Convert Optional<CodeModel> to std::optional<CodeModel>

const char* for LLVMTargetMachineEmitToFile's argument

The `LLVMTargetMachineEmitToFile` takes a `char* Filename` right now, but it doesn't modify it.
This is annoying to use in the case where you w

const char* for LLVMTargetMachineEmitToFile's argument

The `LLVMTargetMachineEmitToFile` takes a `char* Filename` right now, but it doesn't modify it.
This is annoying to use in the case where you want to pass a const string, because you either have to remove the const, or copy it somewhere else and pass that. Either way, it's not very nice.

I added a const and clang formatted it. This shouldn't break any ABI in my opinion.
I'm sorry but I didn't know whom to put as reviewer for this, so I chose someone with a lot of commits from the .cpp file.

Reviewed By: deadalnix

Differential Revision: https://reviews.llvm.org/D124453

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Cleanup includes: LLVMTarget

Most notably, Pass.h is no longer included by TargetMachine.h
before: 1063570306
after: 1063332844

Differential Revision: https://reviews.llvm.org/D121168

Move TargetRegistry.(h|cpp) from Support to MC

This moves the registry higher in the LLVM library dependency stack.
Every client of the target registry needs to link against MC anyway to
actually us

Move TargetRegistry.(h|cpp) from Support to MC

This moves the registry higher in the LLVM library dependency stack.
Every client of the target registry needs to link against MC anyway to
actually use the target, so we might as well move this out of Support.

This allows us to ensure that Support doesn't have includes from MC/*.

Differential Revision: https://reviews.llvm.org/D111454

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Make llvm::StringRef to std::string conversions explicit.

This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.

This is mostly m

Make llvm::StringRef to std::string conversions explicit.

This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.

This is mostly mechanical from a custom clang-tidy check, with a lot of
manual fixups. It uncovers a lot of minor inefficiencies.

This doesn't actually modify StringRef yet, I'll do that in a follow-up.

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Move CodeGenFileType enum to Support/CodeGen.h

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 mod

Move CodeGenFileType enum to Support/CodeGen.h

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.

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Rename F_{None,Text,Append} to OF_{None,Text,Append}. NFC

F_{None,Text,Append} are kept for compatibility since r334221.

llvm-svn: 367800

Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the ne

Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636

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[LLVM-C] Expand LLVMRelocMode

Summary: Add read[only|write] PIC relocation models to the C API and teach the TargetMachine API about it.

Reviewers: whitequark, deadalnix

Reviewed By: whitequark

S

[LLVM-C] Expand LLVMRelocMode

Summary: Add read[only|write] PIC relocation models to the C API and teach the TargetMachine API about it.

Reviewers: whitequark, deadalnix

Reviewed By: whitequark

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D56187

llvm-svn: 350279

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[LLVM-C] Add target triple normalization to the C API.

rL333307 was introduced to remove automatic target triple
normalization when calling sys::getDefaultTargetTriple(), arguing
that users of the l

[LLVM-C] Add target triple normalization to the C API.

rL333307 was introduced to remove automatic target triple
normalization when calling sys::getDefaultTargetTriple(), arguing
that users of the latter already called Triple::normalize()
if necessary. However, users of the C API currently have no way of
doing target triple normalization.

This patch introduces an LLVMNormalizeTargetTriple function to
the C API which wraps Triple::normalize() and can be used on
the result of LLVMGetDefaultTargetTriple to achieve the same effect.

Differential Revision: https://reviews.llvm.org/D49414

Reviewed By: whitequark

llvm-svn: 337263

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CodeGen: Add a dwo output file argument to addPassesToEmitFile and hook it up to dwo output.

Part of PR37466.

Differential Revision: https://reviews.llvm.org/D47089

llvm-svn: 332881

[LLVM-C] Add LLVMGetHostCPU{Name,Features}.

Without these functions it's hard to create a TargetMachine for
Orc JIT that creates efficient native code.

It's not sufficient to just expose LLVMGetHos

[LLVM-C] Add LLVMGetHostCPU{Name,Features}.

Without these functions it's hard to create a TargetMachine for
Orc JIT that creates efficient native code.

It's not sufficient to just expose LLVMGetHostCPUName(), because
for some CPUs there's fewer features actually available than
the CPU name indicates (e.g. AVX might be missing on some CPUs
identified as Skylake).

Differential Revision: https://reviews.llvm.org/D44861

llvm-svn: 329856

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Fix layering by moving Support/CodeGenCWrappers.h to Target

This includes llvm-c/TargetMachine.h which is logically part of
libTarget (since libTarget implements llvm-c/TargetMachine.h's
functions).

Fix layering by moving Support/CodeGenCWrappers.h to Target

This includes llvm-c/TargetMachine.h which is logically part of
libTarget (since libTarget implements llvm-c/TargetMachine.h's
functions).

llvm-svn: 328394

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Remove redundant includes from lib/Target/*.cpp.

llvm-svn: 320633

Fix a bunch more layering of CodeGen headers that are in Target

All these headers already depend on CodeGen headers so moving them into
CodeGen fixes the layering (since CodeGen depends on Target, n

Fix a bunch more layering of CodeGen headers that are in Target

All these headers already depend on CodeGen headers so moving them into
CodeGen fixes the layering (since CodeGen depends on Target, not the
other way around).

llvm-svn: 318490

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Revert "TargetMachine: Merge TargetMachine and LLVMTargetMachine"

Reverting to investigate layering effects of MCJIT not linking
libCodeGen but using TargetMachine::getNameWithPrefix() breaking the

Revert "TargetMachine: Merge TargetMachine and LLVMTargetMachine"

Reverting to investigate layering effects of MCJIT not linking
libCodeGen but using TargetMachine::getNameWithPrefix() breaking the
lldb bots.

This reverts commit r315633.

llvm-svn: 315637

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