As suggested on D76788, this switches the LVI implementation to
return Optional<ValueLatticeElement> from various methods, instead
of passing in a ValueLatticeElement reference and returning a boolean.

Differential Revision: https://reviews.llvm.org/D78383

Remove some unnecessary includes, replace some with forward
declarations.

This also exposed a few places that were missing some includes.

Some includes are not required and forward declarations can be used
instead. This also exposed a few places that were not directly including
required files.

Most of the includes in LoopUtils.h are not required in the header and
they can be replaced by forward declarations.

Unfortunately includes of TargetTransformInfo.h and IVDescriptors.h pull
in a bunch of additional things, but there is no easy way to get rid of
them at the moment I think.

Replace with forward declarations.

Differential Revision: https://reviews.llvm.org/D78394

sched_getaffinity (Linux specific) has been available

* in glibc since 2002-08-08 (commit 972e719e8154eec5f543b027e2a08dfa285d55d5)
* in musl since the initial check-in.

See discussion in D78430.

gcc may warn here because X86ISD::NodeType is specified as "unsigned",
but ISD::NodeType is a naked C enum (although passed as an "unsigned"
throughout SDAG).

getFauxShuffle attempts to combine INSERT_VECTOR_ELT(TRUNCATE/EXTEND(EXTRACT_VECTOR_ELT(x))) patterns into a target shuffle chain.

PR45604 identified an issue where the scalar was truncated to a size smaller than the destination vector element and then zero extended back, which requires the upper bits to be zero'd which we don't currently do.

To avoid the bug I've added an early out in these truncation cases, a future commit should allow us to handle this by inserting the necessary SM_SentinelZero padding.

Summary: Add a command to dexp that exports index data in chosen format (e.g. YAML).

Reviewers: sammccall

Subscribers: kbobyrev, mgorny, ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, usaxena95, cfe-commits

Tags: #clang-tools-extra, #clang

Differential Revision: https://reviews.llvm.org/D77385

This is an enhancement to D77895 to avoid another
round-trip from XMM->GPR->XMM. This time we handle
the case of starting/ending with an f64 and casting
to signed i32 as the intermediate value.

It's a bit more involved than I initially assumed
because we need to use target-specific opcodes to
represent the non-standard cast ops.

Differential Revision: https://reviews.llvm.org/D78362

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: mgorny, ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, usaxena95, cfe-commits

Tags: #clang-tools-extra, #clang

Differential Revision: https://reviews.llvm.org/D77938

bitcast (shuf V, MaskC) --> shuf (bitcast V), MaskC'

This is the widen shuffle elements enhancement to D76727.
It builds on the analysis and simplifications in
D77881 and rG6a7e958a.

The phase ordering tests show that we can simplify inverse
shuffles across a binop in both directions (widen/narrow or
narrow/widen) now.

There's another potential transform visible in some of the
remaining TODOs - move a bitcasted operand of a shuffle
after the shuffle.

Differential Revision: https://reviews.llvm.org/D78371

See PR45510:
https://bugs.llvm.org/show_bug.cgi?id=45510

We had partial coverage for some of these patterns, so removing duplicate tests
with the complete set in the new test file.

Replace SelectionDAG.h include with SelectionDAG forward declaration.

There were a number of cpp files explicitly relying on X86InstrFMA3Info.h to include the X86.h header - so I've had to add it locally.

Add SDDbgLabel/TargetLowering forward declarations.
Add the full SelectionDAG.h include to InstrEmitter.cpp.

Reduce X86Subtarget.h/MCCodeEmitter.h/TargetMachine.h includes to forward declarations
Add explicit X86Subtarget.h/TargetMachine.h includes to X86AsmPrinter.cpp/X86MCInstLower.cpp
Remove unused MCSymbol forward declaration

We were only including MachineInstr.h for DebugLoc.h. This exposes an implicit include dependency in BTFDebug.h where I've had to add the MachineInstr.h include.

We already have to include the TargetLibraryInfo.h header.

No functionality change intended.

This makes it easier to extend the merge options in the future and also
reduces the risk of accidentally setting a wrong option.

Reviewers: efriedma, nikic, reames, davide

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D78368

Update misleading line in conclusions. Although the application to IR
objects is stated earlier, the concluding section contradicts it in
isolation.

Differential Revision: https://reviews.llvm.org/D78446