Changes

[SelectionDAG] Reduce assumptions made about levels. NFC

[InstCombine] fix undef propagation for vector urem transform (PR44186)
As described here: https://bugs.llvm.org/show_bug.cgi?id=44186
The match() code safely allows undef values, but we can't safely 
propagate a vector constant that contains an undef to the new compare
instruction.

[ELF][AArch64] Support R_AARCH64_{CALL26,JUMP26} range extension thunks
with addends
Fixes AArch64 part of PR40438
The current range extension thunk framework does not handle a relocation 
relative to a STT_SECTION symbol with a non-zero addend, which may be 
used by jumps/calls to local functions on some RELA targets (AArch64, 
powerpc ELFv1, powerpc64 ELFv2, etc).  See PR40438 and the following 
code for examples:
  // clang -target $target a.cc
 // .text.cold may be placed in a separate output section.
 // The distance between bar in .text.cold and foo in .text may be
larger than 128MiB.
 static void foo() {}
 __attribute__((section(".text.cold"))) static int bar() { foo(); return
 0; }
 __attribute__((used)) static int dummy = bar();
This patch makes such thunks with addends work for AArch64. The target 
independent part can be reused by PPC in the future.
On REL targets (ARM, MIPS), jumps/calls are not represented as 
STT_SECTION + non-zero addend (see 
MCELFObjectTargetWriter::needsRelocateWithSymbol), so they don't need 
this feature, but we need to make sure this patch does not affect them.
Reviewed By: peter.smith
Differential Revision: https://reviews.llvm.org/D70637

[DAGCombine] Factor oplist operations. NFC

[lit] Be more explicit about the state of tests
Tests go through the following stages:
 *) discovered
 *) filtered
 *) executed
Only executed tests have a result (e.g., PASS, FAIL, XFAIL, etc.).  See
"result codes" in Test.py.
Reviewed By: rnk
Differential Revision: https://reviews.llvm.org/D70612

[update_cc_test_checks.py] Use CHECK_RE from common
Summary: This change modifies the common.CHECK_RE regex to also handle
'//' comment prefixes which allows us to share it between clang and IR
tests. Using the regex from common means that *-SAME lines are also
stripped now. Before this change using the --function-signature flag
would result in -SAME: lines from previous runs not being removed.
Reviewers: MaskRay, jdoerfert
Reviewed By: jdoerfert
Subscribers: jdoerfert, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D70890

[VPlan] Move graph traits (NFC).
By defining the graph traits right after the VPBlockBase definitions, we 
can make use of them earlier in the file.
Reviewers: hsaito, Ayal, gilr
Reviewed By: gilr
Differential Revision: https://reviews.llvm.org/D70733

Reland "b19ec1eb3d0c [BPI] Improve unreachable/ColdCall heurstics to
handle loops."
Summary: b19ec1eb3d0c has been reverted because of the test failures 
with PowerPC targets. This patch addresses the issues from the previous 
commit.
Test Plan: ninja check-all. Confirmed that CodeGen/PowerPC/pr36292.ll 
and CodeGen/PowerPC/sms-cpy-1.ll pass
Subscribers: llvm-commits

[clang][modules] Add support for merging lifetime-extended temporaries
Summary: Add support for merging lifetime-extended temporaries
Reviewers: rsmith
Reviewed By: rsmith
Subscribers: xbolva00, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D70190

[OPENMP]Fix PR44133: Emit definitions of used constructors/functions.
Need to fully rebuild the initializer/combiner when instatiating the 
declare reduction constrcut to properly emit used functions.

[OPENMP]Use cast instead dyn_cast, NFC.
Here the expression is always a DeclRefExpr, no need to use dyn_cast.

[AArch64] Attempt to fixup test line. NFC
The test is complaining on some of the builders. This attempts to adjust
the run line to be more line the others in the same folder, using 
clang_cc1 as opposed to the driver.

[WebAssembly] Find wasm-opt with GetProgramPath
Instead of just searching for wasm-opt in PATH, use GetProgramPath,
which checks the `COMPILER_PATH` environment variable, -B paths, and
`PATH`.
Differential Revision: https://reviews.llvm.org/D70780

[MIBundles] Move analyzeVirtReg out of MIBundleOperands iterator (NFC).
analyzeVirtReg does not really fit into the iterator and moving it makes
it easier to change the base iterator.
Reviewers: evandro, t.p.northover, paquette, MatzeB, arsenm, qcolombet
Reviewed By: qcolombet
Differential Revision: https://reviews.llvm.org/D70558

[ARM] More reversed vcmp tests. NFC

[ARM] Add some VCMP folding and canonicalisation
The VCMP instructions in MVE can accept a register or ZR, but only as 
the right hand operator. Most of the time this will already be correct 
because the icmp will have been canonicalised that way already. There 
are some cases in the lowering of float conditions that this will not 
apply to though. This code should fix up those cases.
Differential Revision: https://reviews.llvm.org/D70822

[ARM] Add ARMCC constants to tablegen. NFC
I got tired of looking at magic constants in tablegen files. This adds 
condition codes like ARMCCeq and makes use of them.
I also removed the extra patterns for reverse condition codes from 
D70296, they should now be covered by the parent commit.
Differential Revision: https://reviews.llvm.org/D70824

[ARM] Add ARMVCCThen to tablegen and make use of it. NFC
Similar to the parent, this adds some constants to tablegen to replace 
the existing magic values.
Differential Revision: https://reviews.llvm.org/D70825

[GlobalISel] CombinerHelper: Fix a bug in matchCombineCopy
Summary: When combining COPY instructions, we were replacing the
destination registers with the source register without checking register
constraints. This patch adds a simple logic to check if the constraints
match before replacing registers.
Reviewers: qcolombet, aditya_nandakumar, aemerson, paquette, dsanders,
Petar.Avramovic
Reviewed By: aditya_nandakumar
Subscribers: rovka, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D70616

[lldb] Fix TestFormattersSBAPI test
Summary: This test was broken in two ways:
* Using the wrong API (e.g.: format = instead of SetFormat)
* The hex checker was only checking "01" which will pass with 0x0000001
Reviewers: clayborg, lanza, wallace
Reviewed By: clayborg
Subscribers: lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D70884

[LLDB] Set the right address size on output DataExtractors from
ObjectFile
If filling in a DataExtractor from an ObjectFile, e.g. via the 
ReadSectionData method, the output DataExtractor gets the address size
from the m_data member.
ObjectFile's m_data member is initialized without knowledge about the
address size (so the address size is set based on the host's 
sizeof(void*), and at that point within ObjectFile's constructor, 
virtual methods implemented in subclasses (like GetAddressByteSize()) 
can't be called, therefore fix it up when filling in external 
DataExtractors.
This makes sure that line tables from executables with a different 
address size are parsed properly; previously this tripped up 
DWARFDebugLine::LineTable::parse for 32 bit executables on a 64 bit 
host, as the address size in the line table (4) didn't match the one set
in the DWARFDataExtractor.
Differential Revision: https://reviews.llvm.org/D70848

[MIBundles] Move analyzePhysReg out of MIBundleOperands iterator (NFC).
analyzePhysReg does not really fit into the iterator and moving it makes
it easier to change the base iterator.
Reviewers: evandro, t.p.northover, paquette, MatzeB, arsenm, qcolombet
Reviewed By: arsenm
Differential Revision: https://reviews.llvm.org/D70559

[clangd] repair mac tests for 88bccded8fa1

[lldb/CMake] Simplify logic for adding example Python packages (NFC)
This simplifies the CMake logic for adding the Python examples to the 
Python package. It unifies the use of create_python_package by adding 
the NOINIT option and removes the `target` argument, which is always
`finish_swig`.

[lldb/CMake] Add in_call_stack to the utilities package
A subset of the examples are shipped as python packages. Include the 
in_call_stack utility.

[Remarks][ThinLTO] Use the correct file extension based on the format
Since we now have multiple formats, the ThinLTO remark files should also 
respect that.

Revert "[clangd] repair mac tests for 88bccded8fa1"
Revert "[clangd] Try harder to find a plausible `clang` as argv0,
particularly on Mac."

[libcxx{,abi}] Emit deplibs only when detected by CMake
This is a followup to 35bc5276ca3.  It fixes the dependent libs usage in
libcxx and libcxxabi to link pthread and rt libraries only if CMake 
detects them, rather than based on explicit platform blacklist.
Differential Revision: https://reviews.llvm.org/D70888