SuccessChanges

Summary

  1. RegAllocFast: Make self loop live-out heuristic more aggressive (details)
  2. [libc++] Ensure streams are initialized early (details)
  3. Re-land: Add new hidden option -print-changed which only reports changes to IR (details)
  4. [llvm-nm] Use aggregate initialization instead of memset zero (details)
  5. [SLP] add tests for reduction ordering; NFC (details)
  6. ValueEnumerator.cpp - remove duplicate includes. NFCI. (details)
  7. InterferenceCache.cpp - remove duplicate includes. NFCI. (details)
  8. raw_ostream.cpp - remove duplicate includes. NFCI. (details)
  9. DwarfUnit.h - remove unnecessary includes. NFCI. (details)
  10. [GISel] Add new combines for unary FP instrs with constant operand (details)
  11. [Sema][MSVC] warn at dynamic_cast/typeid when /GR- is given (details)
  12. [libFuzzer] Enable entropic by default. (details)
  13. Sema: add support for `__attribute__((__swift_bridge__))` (details)
  14. fix test no-rtti.cpp (details)
  15. [clang][codegen] Skip adding default function attributes on intrinsics. (details)
  16. [AArch64][GlobalISel] Make G_BUILD_VECTOR os <16 x s8> legal. (details)
  17. [gn build] make "all" target build (details)
  18. GlobalISel: Lift store value widening restriction (details)
  19. [obj2yaml] - Match ".stack_size" with the original section name, and not the uniquified name. (details)
  20. Add '<' meta command to read in code from external file (details)
  21. [UpdateTestChecks][NFC] Fix spelling (details)
  22. [OpenMP][FIX] Do not crash trying to print a missing (demangled) user condition (details)
  23. [OpenMP][FIX] Do not drop a '$' while demangling declare variant names (details)
  24. [OpenMP] Support nested OpenMP context selectors (declare variant) (details)
  25. [OpenMP] Context selector extensions for return value overloading (details)
  26. [OpenMP] Overload `std::isnan` and friends multiple times for the GPU (details)
  27. [OpenMP] Context selector extensions for template functions (details)
  28. [OpenMP] Support `std::complex` math functions in target regions (details)
  29. [AMDGPU] gfx1030 RT support (details)
  30. Revert "[obj2yaml] - Match ".stack_size" with the original section name, and not the uniquified name." (details)
  31. [SystemZ][z/OS] Set aligned allocation unavailable by default for z/OS (details)
  32. [gn build] unconfuse sync script about "sources = []" in clang/lib/Headers/BUILD.gn (details)
  33. Fix build. (details)
  34. [InstCombine] Add test for infinite combine loop (NFC) (details)
  35. [InstSimplify] Clarify SimplifyWithOpReplaced() return value (details)
  36. Reapply [InstCombine] Simplify select operand based on equality condition (details)
  37. [gn build] Port 56069b5c71c (details)
Commit 738c73a454881ca78214816754c1b82941d0cd26 by Matthew.Arsenault
RegAllocFast: Make self loop live-out heuristic more aggressive

This currently has no impact on code, but prevents sizeable code size
regressions after D52010. This prevents spilling and reloading all
values inside blocks that loop back. Add a baseline test which would
regress without this patch.
The file was modifiedllvm/lib/CodeGen/RegAllocFast.cpp
The file was addedllvm/test/CodeGen/AMDGPU/fastregalloc-self-loop-heuristic.mir
Commit 39faf428164a28f3652370958ce893d9200927c8 by Louis Dionne
[libc++] Ensure streams are initialized early

When statically linking libc++ on some systems, the streams are not
initialized early enough, which causes all kinds of issues. This was
reported e.g. in http://llvm.org/PR28954, but also in various open
source projects that use libc++.

Fixes http://llvm.org/PR28954.

Differential Revision: https://reviews.llvm.org/D31413
The file was modifiedlibcxx/src/iostream.cpp
The file was addedlibcxx/test/std/input.output/iostream.objects/init.pass.cpp
Commit f9e6d1edc0dad9afb26e773aa125ed62c58f7080 by anhtuyen
Re-land: Add new hidden option -print-changed which only reports changes to IR

A new hidden option -print-changed is added along with code to support
printing the IR as it passes through the opt pipeline in the new pass
manager. Only those passes that change the IR are reported, with others
only having the banner reported, indicating that they did not change the
IR, were filtered out or ignored. Filtering of output via the
-filter-print-funcs is supported and a new supporting hidden option
-filter-passes is added. The latter takes a comma separated list of pass
names and filters the output to only show those passes in the list that
change the IR. The output can also be modified via the -print-module-scope
function.

The code introduces a template base class that generalizes the comparison
of IRs that takes an IR representation as template parameter. The
constructor takes a series of lambdas that provide an event based API
for generalized reporting of IRs as they are changed in the opt pipeline
through the new pass manager.

The first of several instantiations is provided that prints the IR
in a form similar to that produced by -print-after-all with the above
mentioned filtering capabilities. This version, and the others to
follow will be introduced at the upcoming developer's conference.

Reviewed By: aeubanks (Arthur Eubanks), yrouban (Yevgeny Rouban), ychen (Yuanfang Chen)

Differential Revision: https://reviews.llvm.org/D86360
The file was addedllvm/test/Other/change-printer.ll
The file was modifiedllvm/lib/IR/LegacyPassManager.cpp
The file was modifiedllvm/lib/Passes/StandardInstrumentations.cpp
The file was modifiedllvm/include/llvm/Passes/StandardInstrumentations.h
Commit 50f4c7c785da87679fac1f483ef6a3e53dfca37a by i
[llvm-nm] Use aggregate initialization instead of memset zero
The file was modifiedllvm/tools/llvm-nm/llvm-nm.cpp
Commit b011611e373c3d6dfddde5120ce7974cc8719d4a by spatel
[SLP] add tests for reduction ordering; NFC
The file was modifiedllvm/test/Transforms/SLPVectorizer/X86/compare-reduce.ll
Commit c6a82fdbf2ea691fdaf70fb07ae1f61d8452e1ac by llvm-dev
ValueEnumerator.cpp - remove duplicate includes. NFCI.

Remove headers already included in ValueEnumerator.h
The file was modifiedllvm/lib/Bitcode/Writer/ValueEnumerator.cpp
Commit 69682f993cc0545da30be32fab572a2a56074653 by llvm-dev
InterferenceCache.cpp - remove duplicate includes. NFCI.

Remove headers already included in InterferenceCache.h
The file was modifiedllvm/lib/CodeGen/InterferenceCache.cpp
Commit 73d02064d2533daecf6fe82b8608da8f6eed59a5 by llvm-dev
raw_ostream.cpp - remove duplicate includes. NFCI.

Remove headers already included in raw_ostream.h
The file was modifiedllvm/lib/Support/raw_ostream.cpp
Commit 8f7d6b2375618a79f621d5484e44870ede335a13 by llvm-dev
DwarfUnit.h - remove unnecessary includes. NFCI.
The file was modifiedllvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
The file was modifiedllvm/lib/CodeGen/AsmPrinter/DwarfUnit.h
Commit c4e589b7954c4e202474ce4a2101f07014792835 by mkitzan
[GISel] Add new combines for unary FP instrs with constant operand

https://reviews.llvm.org/D86393

Patch adds five new `GICombinerRules`, one for each of the following unary
FP instrs: `G_FNEG`, `G_FABS`, `G_FPTRUNC`, `G_FSQRT`, and `G_FLOG2`. The
combine rules perform the FP operation on the constant operand and replace
the original instr with the result. Patch additionally adds new combiner
tests for the AArch64 target to test these new combiner rules.
The file was modifiedllvm/test/CodeGen/AArch64/GlobalISel/combine-fneg.mir
The file was addedllvm/test/CodeGen/AArch64/GlobalISel/combine-fsqrt.mir
The file was addedllvm/test/CodeGen/AArch64/GlobalISel/combine-fptrunc.mir
The file was modifiedllvm/test/CodeGen/AArch64/GlobalISel/combine-fabs.mir
The file was modifiedllvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
The file was modifiedllvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
The file was modifiedllvm/lib/CodeGen/LowLevelType.cpp
The file was modifiedllvm/include/llvm/Target/GlobalISel/Combine.td
The file was addedllvm/test/CodeGen/AArch64/GlobalISel/combine-flog2.mir
The file was modifiedllvm/include/llvm/CodeGen/LowLevelType.h
Commit ebf267b87d4b557dff488f87f66df3628e3da957 by zequanwu
[Sema][MSVC] warn at dynamic_cast/typeid when /GR- is given

Differential Revision: https://reviews.llvm.org/D86369
The file was modifiedclang/lib/Sema/SemaCast.cpp
The file was modifiedclang/lib/Sema/SemaExprCXX.cpp
The file was addedclang/test/SemaCXX/no-rtti-data.cpp
The file was addedclang/test/SemaCXX/ms-no-rtti-data.cpp
The file was modifiedclang/include/clang/Basic/DiagnosticGroups.td
The file was modifiedclang/include/clang/Basic/DiagnosticSemaKinds.td
Commit f3c2e0bcee64b0905addaefe9cd0c9ad4d20ac6f by mascasa
[libFuzzer] Enable entropic by default.

Entropic has performed at least on par with vanilla scheduling on
Clusterfuzz, and has shown a slight coverage improvement on FuzzBench:
https://www.fuzzbench.com/reports/2020-08-31/index.html

Reviewed By: Dor1s

Differential Revision: https://reviews.llvm.org/D87476
The file was modifiedcompiler-rt/test/fuzzer/keep-seed.test
The file was modifiedcompiler-rt/lib/fuzzer/FuzzerFlags.def
The file was modifiedcompiler-rt/test/fuzzer/cross_over_uniform_dist.test
The file was modifiedcompiler-rt/lib/fuzzer/FuzzerDriver.cpp
The file was modifiedcompiler-rt/lib/fuzzer/FuzzerOptions.h
Commit 77a01d9498a79d2e6e3f366fdb363928f188ec11 by Saleem Abdulrasool
Sema: add support for `__attribute__((__swift_bridge__))`

This extends semantic analysis of attributes for Swift interoperability
by introducing the `swift_bridge` attribute.  This attribute enables
bridging Objective-C types to Swift specific types.

This is based on the work of the original changes in
https://github.com/llvm/llvm-project-staging/commit/8afaf3aad2af43cfedca7a24cd817848c4e95c0c

Differential Revision: https://reviews.llvm.org/D87532
Reviewed By: Aaron Ballman
The file was modifiedclang/include/clang/Basic/AttrDocs.td
The file was addedclang/test/AST/attr-swift_bridge.m
The file was modifiedclang/include/clang/Basic/Attr.td
The file was modifiedclang/lib/Sema/SemaDeclAttr.cpp
The file was addedclang/test/SemaObjC/attr-swift_bridge.m
Commit 4d437348d24d6342bdeb3ad84a64e57a889a0ea2 by zequanwu
fix test no-rtti.cpp
The file was modifiedclang/test/SemaCXX/no-rtti.cpp
Commit 4d4f0922837de3f1aa9862ae8a8d941b3b6e5f78 by michael.hliao
[clang][codegen] Skip adding default function attributes on intrinsics.

- After loading builtin bitcode for linking, skip adding default
  function attributes on LLVM intrinsics as their attributes are
  well-defined and retrieved directly from internal definitions. Adding
  extra attributes on intrinsics results in inconsistent result when
  `-save-temps` is present. Also, that makes few optimizations
  conservative.

Differential Revision: https://reviews.llvm.org/D87761
The file was modifiedclang/lib/CodeGen/CodeGenAction.cpp
The file was addedclang/test/CodeGenCUDA/Inputs/device-lib-code.ll
The file was addedclang/test/CodeGenCUDA/dft-func-attr-skip-intrinsic.hip
Commit 6ad33d8360335143ef50e7f7b66ae1ce17aaa2a5 by Amara Emerson
[AArch64][GlobalISel] Make G_BUILD_VECTOR os <16 x s8> legal.
The file was modifiedllvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
The file was modifiedllvm/test/CodeGen/AArch64/GlobalISel/legalize-build-vector.mir
Commit b3d33f5e838f8a181feb391fc96e74e3bb6be110 by thakis
[gn build] make "all" target build

If you want to build everything, building the default target
via just `ninja` is better, but `ninja all` shouldn't give you
compile errors -- this fixes that.
The file was modifiedllvm/utils/gn/secondary/compiler-rt/lib/scudo/BUILD.gn
Commit 88bdcbbf1aaef6ac99877cc511bf4b2a85343773 by Matthew.Arsenault
GlobalISel: Lift store value widening restriction

This doesn't change the memory size and doesn't need to worry about
non-power-of-2 sizes.
The file was modifiedllvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
The file was modifiedllvm/test/CodeGen/AMDGPU/GlobalISel/legalize-store-global.mir
The file was modifiedllvm/test/CodeGen/AMDGPU/GlobalISel/legalize-store.mir
Commit 14e55f82980cf1342d4d3eea4885a5375e829496 by rahmanl
[obj2yaml] - Match ".stack_size" with the original section name, and not the uniquified name.

Without this patch, obj2yaml decodes the content of only one ".stack_size" section. Other sections are dumped with their full contents.

Reviewed By: grimar, MaskRay

Differential Revision: https://reviews.llvm.org/D87727
The file was modifiedllvm/test/tools/obj2yaml/ELF/stack-sizes.yaml
The file was modifiedllvm/tools/obj2yaml/elf2yaml.cpp
Commit f723d193e2c92ea6903e3debfee32b13354808bc by jingham
Add '<' meta command to read in code from external file

Perform all error handling in ReadCode()

Add :help text describing “< path”, add extra line before Commands

Differential Revision: https://reviews.llvm.org/D87640
The file was modifiedlldb/source/Expression/REPL.cpp
Commit dbde3969ba8e2b396333dc6b139a0b3a88dfbc80 by johannes
[UpdateTestChecks][NFC] Fix spelling
The file was modifiedllvm/utils/UpdateTestChecks/common.py
Commit 6a02932becaeaeb02eddfaed567f3dad3719dd1c by johannes
[OpenMP][FIX] Do not crash trying to print a missing (demangled) user condition

Reviewed By: JonChesterfield

Differential Revision: https://reviews.llvm.org/D85875
The file was addedclang/test/AST/ast-dump-openmp-begin-declare-variant_13.c
The file was modifiedclang/lib/AST/OpenMPClause.cpp
Commit 05fd04eda4b22b09e33753132cbf037a1265c7e2 by johannes
[OpenMP][FIX] Do not drop a '$' while demangling declare variant names

Reviewed By: ABataev

Differential Revision: https://reviews.llvm.org/D85876
The file was modifiedclang/test/AST/ast-dump-openmp-declare-variant-extensions.c
The file was modifiedclang/lib/AST/OpenMPClause.cpp
Commit 5c63ae156e96a20ce96570d4bd2c48a9c8170a9d by johannes
[OpenMP] Support nested OpenMP context selectors (declare variant)

Due to `omp begin/end declare variant`, OpenMP context selectors can be
nested. This patch adds initial support for this so we can use it for
target math variants. We should improve the detection of "equivalent"
scores and user conditions, we should also revisit the data structures
of the OMPTraitInfo object, however, both are not pressing issues right
now.

Reviewed By: JonChesterfield

Differential Revision: https://reviews.llvm.org/D85877
The file was modifiedclang/include/clang/Parse/Parser.h
The file was modifiedclang/lib/Parse/ParseOpenMP.cpp
The file was addedclang/test/AST/ast-dump-openmp-begin-declare-variant_nested.c
The file was modifiedclang/include/clang/Sema/Sema.h
The file was modifiedclang/test/OpenMP/declare_variant_messages.c
The file was modifiedclang/lib/Sema/SemaOpenMP.cpp
The file was modifiedclang/include/clang/Basic/DiagnosticParseKinds.td
The file was modifiedclang/include/clang/Basic/DiagnosticSemaKinds.td
Commit c4b7a1da9d872ed075ce99c80a90b11a135577a0 by johannes
[OpenMP] Context selector extensions for return value overloading

This extension allows to declare variants in between `omp begin/end
declare variant` that do not match the type of the existing function
with that name. Without this extension we would not find a base function
(with a compatible type), therefore create a new one, which would
cause conflicting declarations. With this extension we will not create
"missing" base functions, which basically renders these specializations
harmless. They will be generated but never called.

Reviewed By: JonChesterfield

Differential Revision: https://reviews.llvm.org/D85878
The file was modifiedclang/lib/Parse/ParseOpenMP.cpp
The file was addedclang/test/AST/ast-dump-openmp-begin-declare-variant-varying-return.c
The file was modifiedclang/include/clang/AST/OpenMPClause.h
The file was modifiedclang/include/clang/Basic/AttrDocs.td
The file was modifiedclang/lib/Sema/SemaOpenMP.cpp
The file was modifiedllvm/include/llvm/Frontend/OpenMP/OMPKinds.def
Commit 97652202d1e6964d5d7a1c03a257452c7ad95233 by johannes
[OpenMP] Overload `std::isnan` and friends multiple times for the GPU

`std::isnan` and friends can be found in two variants in the wild, one
returns `bool`, as the standard defines it, one returns `int`, as the C
macros do. So far we kinda hoped the system versions of these functions
will work for people, e.g. they are definitions that can be compiled for
the target. We know that is not the case always so we leverage the
`disable_implicit_base` OpenMP context extension to specialize both
versions of these functions without causing an invalid redeclaration.

Reviewed By: JonChesterfield, tra

Differential Revision: https://reviews.llvm.org/D85879
The file was modifiedclang/test/Headers/Inputs/include/cmath
The file was modifiedclang/lib/Headers/__clang_cuda_cmath.h
The file was addedclang/test/Headers/openmp_device_math_isnan.cpp
Commit 5c1084e8840b02d410ba125cbba466465242d820 by johannes
[OpenMP] Context selector extensions for template functions

With this extension the effects of `omp begin declare variant` will be
applied to template function declarations. The behavior is opt-in and
controlled by the `extension(allow_templates)` trait. While generally
useful, this will enable us to implement complex math function calls by
overloading the templates of the standard library with the ones in
libc++.

Reviewed By: JonChesterfield

Differential Revision: https://reviews.llvm.org/D85735
The file was modifiedclang/lib/Sema/SemaOpenMP.cpp
The file was modifiedclang/lib/Sema/SemaTemplateInstantiateDecl.cpp
The file was modifiedclang/lib/Sema/SemaDecl.cpp
The file was modifiedclang/include/clang/Sema/Sema.h
The file was addedclang/test/AST/ast-dump-openmp-begin-declare-variant_template_2.cpp
The file was modifiedllvm/include/llvm/Frontend/OpenMP/OMPKinds.def
The file was modifiedclang/lib/Headers/openmp_wrappers/cmath
The file was modifiedclang/lib/Parse/ParseOpenMP.cpp
The file was modifiedclang/include/clang/Basic/AttrDocs.td
Commit 56069b5c71ca78749aa983c1e9de6f1e4c049f4b by johannes
[OpenMP] Support `std::complex` math functions in target regions

The last (big) missing piece to get "math" working in OpenMP target
regions (that I know of) was complex math functions, e.g.,
`std::sin(std::complex<double>)`. With this patch we overload the system
template functions for these operations with versions that have been
distilled from `libcxx/include/complex`. We use the same
  `omp begin/end declare variant`
mechanism we use for other math functions before, except that we this
time overload templates (via D85735).

Reviewed By: JonChesterfield

Differential Revision: https://reviews.llvm.org/D85777
The file was modifiedclang/test/Headers/Inputs/include/complex
The file was addedclang/test/Headers/Inputs/include/type_traits
The file was modifiedclang/lib/Headers/CMakeLists.txt
The file was addedclang/lib/Headers/openmp_wrappers/complex_cmath.h
The file was modifiedclang/test/Headers/nvptx_device_math_complex.cpp
The file was modifiedclang/lib/Headers/openmp_wrappers/complex
Commit 91f503c3af190e19974f8832871e363d232cd64c by Stanislav.Mekhanoshin
[AMDGPU] gfx1030 RT support

Differential Revision: https://reviews.llvm.org/D87782
The file was modifiedllvm/lib/Target/AMDGPU/SIISelLowering.cpp
The file was modifiedllvm/include/llvm/IR/IntrinsicsAMDGPU.td
The file was modifiedllvm/lib/Target/AMDGPU/SILoadStoreOptimizer.cpp
The file was modifiedllvm/lib/Target/AMDGPU/MIMGInstructions.td
The file was modifiedllvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
The file was addedllvm/test/CodeGen/AMDGPU/llvm.amdgcn.intersect_ray.ll
The file was modifiedllvm/lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.cpp
The file was modifiedllvm/test/MC/AMDGPU/gfx1011_err.s
The file was modifiedllvm/lib/Target/AMDGPU/SIShrinkInstructions.cpp
The file was modifiedllvm/test/MC/AMDGPU/gfx1030_new.s
The file was modifiedllvm/lib/Target/AMDGPU/SIAddIMGInit.cpp
The file was modifiedllvm/test/MC/Disassembler/AMDGPU/gfx1030_dasm_new.txt
Commit f80f2516a2697218eeb7af80de3b13c38f342987 by rahmanl
Revert "[obj2yaml] - Match ".stack_size" with the original section name, and not the uniquified name."

This reverts commit 14e55f82980cf1342d4d3eea4885a5375e829496.
The file was modifiedllvm/test/tools/obj2yaml/ELF/stack-sizes.yaml
The file was modifiedllvm/tools/obj2yaml/elf2yaml.cpp
Commit 2240ca0bd1502d7baa098da7cb4aca64a6f979d4 by Abhina.Sreeskantharajan
[SystemZ][z/OS] Set aligned allocation unavailable by default for z/OS

Aligned allocation is not supported on z/OS. This patch sets -faligned-alloc-unavailable as default in z/OS toolchain.

Reviewed By: abhina.sreeskantharajan, hubert.reinterpretcast

Differential Revision: https://reviews.llvm.org/D87611
The file was modifiedclang/test/Lexer/aligned-allocation.cpp
The file was modifiedclang/lib/Driver/ToolChains/ZOS.cpp
The file was modifiedclang/include/clang/Basic/Attr.td
The file was modifiedclang/lib/Sema/SemaExprCXX.cpp
The file was modifiedclang/test/Driver/unavailable_aligned_allocation.cpp
The file was modifiedclang/lib/Driver/ToolChains/ZOS.h
The file was modifiedclang/test/SemaCXX/unavailable_aligned_allocation.cpp
The file was modifiedclang/include/clang/Basic/AlignedAllocation.h
The file was modifiedclang/include/clang/Basic/DiagnosticSemaKinds.td
The file was modifiedclang/lib/Basic/Targets/OSTargets.h
Commit 15c378f6e641f34bb9fd3582f9cb83ff686101dc by thakis
[gn build] unconfuse sync script about "sources = []" in clang/lib/Headers/BUILD.gn
The file was modifiedllvm/utils/gn/build/sync_source_lists_from_cmake.py
Commit 6859d95ea2d0f3fe0de2923a3f642170e66a1a14 by michael.hliao
Fix build.
The file was modifiedllvm/lib/Passes/StandardInstrumentations.cpp
Commit 94d912021ff35d33cde96dacd6f1db925fe9f2b8 by nikita.ppv
[InstCombine] Add test for infinite combine loop (NFC)

Test courtesy of bkramer for the infinite combine loop introduced
by D87480.
The file was modifiedllvm/test/Transforms/InstCombine/select.ll
Commit 0bb06f297fe52a5125952cb6f1e264b4e7c48097 by nikita.ppv
[InstSimplify] Clarify SimplifyWithOpReplaced() return value

If SimplifyWithOpReplaced() cannot simplify the value, null should
be returned. Make sure this really does happen in all cases,
including those where SimplifyBinOp() returns the original value.

This does not matter for existing users, but does mattter for
D87480, which would go into an infinite loop otherwise.
The file was modifiedllvm/lib/Analysis/InstructionSimplify.cpp
The file was modifiedllvm/include/llvm/Analysis/InstructionSimplify.h
Commit 222bf3ffbc8419570fc2266a2e7d1c5f58cedaa7 by nikita.ppv
Reapply [InstCombine] Simplify select operand based on equality condition

Reapply after fixing SimplifyWithOpReplaced() to never return
the original value, which would lead to an infinite loop in this
transform.

-----

For selects of the type X == Y ? A : B, check if we can simplify A
by using the X == Y equality and replace the operand if that's
possible. We already try to do this in InstSimplify, but will only
fold if the result of the simplification is the same as B, in which
case the select can be dropped entirely. Here the select will be
retained, just one operand simplified.

As we are performing an actual replacement here, we don't have
problems with refinement / poison values.

Differential Revision: https://reviews.llvm.org/D87480
The file was modifiedllvm/test/Transforms/InstCombine/select-binop-cmp.ll
The file was modifiedllvm/test/Transforms/InstCombine/rem.ll
The file was modifiedllvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
The file was modifiedllvm/test/Transforms/InstCombine/select.ll
Commit 2a078a977e90481954eef69b489fac650ddbdaf6 by llvmgnsyncbot
[gn build] Port 56069b5c71c
The file was modifiedllvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn