[dev.fuzz] all: merge master (af72ddfc) into dev.fuzz

This now includes the fix in CL 350729, which means
we no longer need to skip the test in dev.fuzz.

Conflicts:

- src/cmd/compile/internal/noder/unified_test.go

Merge List:

+ 2021-09-20 af72ddfc cmd/compile: extend dump-to-file to handle "genssa" (asm) case.
+ 2021-09-20 3c764bab cmd/go: write go.mod requirements more consistently for go 1.17+
+ 2021-09-20 6268468e cmd/link: generate DIE for types referenced only through dictionaries
+ 2021-09-20 6acac8b6 cmd/compile: delay all transforms for generic funcs/methods
+ 2021-09-20 988f18d6 go/types: export Named._Orig as Named.Origin
+ 2021-09-20 b6dddacc cmd/compile: fix transform.AssignOp to deal with tricky case
+ 2021-09-20 9e60c371 cmd/compile: document register-based ABI for ppc64
+ 2021-09-20 79159f2e cmd/compile: fix simplification rules on arm/arm64
+ 2021-09-20 eff27e85 cmd/compile: ensure constant shift amounts are in range for arm
+ 2021-09-20 9ebe7c8e go/test: add a test for issue 48344
+ 2021-09-20 6f35430f cmd/compile: allow rotates to be merged with logical ops on arm64
+ 2021-09-20 2d9b4864 cmd/compile: update doc at top of iexport.go on the changes for typeparams
+ 2021-09-20 a81b0dc6 cmd/compile: rename instType -> instanceType
+ 2021-09-20 11921356 cmd/cgo: remove hardcoded '-pie' ldflag for linux/arm
+ 2021-09-20 a83a5587 cmd/compile: fix export/import of range loop.
+ 2021-09-19 315dbd10 cmd/compile: fold double negate on arm64
+ 2021-09-19 83b36ffb cmd/compile: implement constant rotates on arm64
+ 2021-09-19 771b8ea4 cmd/compile: fix missing markHiddenClosureDead in deadcode pass
+ 2021-09-18 c894b442 net/rpc: remove warnings on incompatible methods at registration
+ 2021-09-17 4b654c0e cmd/compile: SSA ".this" variable
+ 2021-09-17 f01721ef cmd/compile: remove self copies in tail-call wrappers
+ 2021-09-17 163871fe time: re-add space-padded day of year to docs
+ 2021-09-17 ac7c3476 time: support fractional timezone minutes in MarshalBinary
+ 2021-09-17 07b30a4f cmd/compile: delay transformAssign if lhs/rhs have typeparam
+ 2021-09-17 c10b9802 cmd/compile: restore tail call for method wrappers
+ 2021-09-17 50e45082 cmd/compile: fix import/export of Init and Def fields.
+ 2021-09-17 3fa35b5f go/types: ensure that we always get a new signature in expandNamed
+ 2021-09-17 3fa7dbef cmd/go: fix GOARCH value in GOAMD64 docs
+ 2021-09-17 974b0166 syscall: implement Pipe using pipe2 syscall on all linux platforms
+ 2021-09-17 1a49dcb8 syscall: remove //sysnb comment generating Setreuid for linux/arm64
+ 2021-09-17 cea7a71d cmd/compile: fix generic type handling in crawler
+ 2021-09-17 74e384f5 internal/poll: inject a hook into the runtime finalizer to count the closed pipes
+ 2021-09-17 323c6f74 log: don't format if writing to io.Discard
+ 2021-09-17 7f36ef0a cmd/compile/internal/noder: hide TestUnifiedCompare behind -cmp flag
+ 2021-09-17 70493b3e runtime/cgo: save and restore X3 (aka GP) for crosscall1 on riscv64
+ 2021-09-17 6d02ce85 runtime: fix prettyprinting of parametric types in gdb
+ 2021-09-17 6602c86a cmd/internal/obj/riscv: improve instruction validation
+ 2021-09-17 14e812bf syscall: do not use handle lists on windows when NoInheritHandles is true
+ 2021-09-16 8d2a9c32 all: remove incorrectly repeated words in comments
+ 2021-09-16 af9da137 A+C: update name to real name and add to AUTHORS
+ 2021-09-16 265b59ae cmd/cgo: for godefs, don't let field prefix removal cause duplicates
+ 2021-09-16 4efdaa7b testing: skip panics when picking the line number for decoration
+ 2021-09-16 e09dcc21 go/types, types2: add an additional shift test case
+ 2021-09-16 5402b437 spec: fix incorrect type in a shift example
+ 2021-09-16 d09e09bc cmd/compile: fixing writebarrier.go for -G=3
+ 2021-09-16 bcdc61d8 cmd/compile: preserve statements better in expandCalls
+ 2021-09-16 48e2b1ea cmd/compile: fix LocResults formatting
+ 2021-09-16 b1bedc07 cmd/go: add GOAMD64 environment variable
+ 2021-09-16 04f5116c cmd/go: clean paths before checking same directory
+ 2021-09-16 e7dbe390 cmd/cgo: add missing tab in exports for a result of void
+ 2021-09-15 cfa233d7 cmd/compile: remove unneeded early transforms, with dictionary change
+ 2021-09-15 59a9a035 cmd/compile: switch to computing dict format on instantiated functions
+ 2021-09-15 0edc6c4f cmd/internal/obj/ppc64: generate prologue code compatible with new ABI
+ 2021-09-15 03df68d3 runtime: fix setting of cpu features for amd64
+ 2021-09-15 61969793 cmd/go/internal/modload: prevent tidy downgrading disambiguating modules
+ 2021-09-15 72bb8185 cmd/compile: emit DWARF info about dictionary entries
+ 2021-09-15 5b48fca1 cmd/compile: mark wrapper functions with DW_AT_trampoline
+ 2021-09-15 e4dfd788 go/internal/gcimporter,cmd/compile: minor clean-up in iimport.go
+ 2021-09-15 4847c47c cmd/compile/internal/types2: eliminate Named.instPos
+ 2021-09-15 3100f54f cmd/compile/internal/types2: merge Named type loading and expansion
+ 2021-09-15 738cebb1 cmd/compile/internal/types2: implement Identical for *Union types
+ 2021-09-15 b26d325c cmd/compile/internal/types2: remove some unnecessary loading/expansion of Named types
+ 2021-09-15 9fc28892 cmd/compile/internal/types2: export TypeHash, return value without blanks
+ 2021-09-15 2da3375e runtime: in adjustTimers back up as far as necessary
+ 2021-09-15 c7f2f51f cmd/go: remove subcommand prefix from error messages
+ 2021-09-15 0bb40b08 go/types: implement Identical for *Union types
+ 2021-09-15 cb4e1de0 go/types: minor cleanup of instantiation
+ 2021-09-15 a0f31294 go/types: instantiate methods when instantiating Named types
+ 2021-09-14 bf26e43d go/types: eliminate Named.instPos
+ 2021-09-14 2933c451 go/types: merge Named type loading and expansion
+ 2021-09-14 137543bb cmd/compile: set IsShape based on type being in the Shapes pkg
+ 2021-09-14 3a72175c cmd/compile: fix test/typeparam/mdempsky/4.go for -G=3
+ 2021-09-14 b2c04f0d runtime: avoid loop variable capture in test
+ 2021-09-14 181e8cde go/internal/gcimporter: remove outdated comment
+ 2021-09-14 8699425b syscall: remove use of IN_KUBERNETES in test
+ 2021-09-14 b3c6de9d cmd/internal/obj/ppc64: allow VR register arguments to VS registers
+ 2021-09-14 ee91bb83 cmd/compile: prevent typecheck importer reading type parameter twice
+ 2021-09-14 2953cd00 go/internal/gcimporter: prevent importReader reading type parameter twice
+ 2021-09-14 b8c802b1 cmd/compile: prevent importReader reading type parameter twice
+ 2021-09-14 4a4221e8 all: remove some unused code
+ 2021-09-14 71adc658 runtime: change time.now to ABIInternal
+ 2021-09-14 146e8d49 reflect: use Value.Len instead of conversion to slice header
+ 2021-09-13 9a58aa26 spec: fix prose about terminating statements
+ 2021-09-13 42057e98 cmd/compile: save the note of fields when translating struct
+ 2021-09-13 960d036f cmd/go: add missing parenthesis in a call to "PrintVersion"
+ 2021-09-13 81a4fe6f cmd/link/internal/ld: re-enable DWARF tests on solaris/illumos
+ 2021-09-13 f93a63ad reflect: add a floating point section to DeepEqual tests
+ 2021-09-13 a0c409cb reflect: add fast paths for common, simple Kinds to DeepEqual
+ 2021-09-13 ac40c987 reflect: fix _faststr optimization
+ 2021-09-13 c8a58f29 cmd/go: add test to check for a potential workspace loading issue
+ 2021-09-13 e74e363a strings: add Clone function
+ 2021-09-13 bced369a cmd/link: minor code cleanup in dwarf gen
+ 2021-09-13 c3b217a0 cmd/go: document 'go install cmd@version' ignores vendor directories
+ 2021-09-12 ad97d204 go/types: remove some unnecessary loading/expansion of Named types
+ 2021-09-12 0d8a4bfc bufio: add Writer.AvailableBuffer
+ 2021-09-11 23832ba2 reflect: optimize for maps with string keys
+ 2021-09-11 a50225a0 bufio: make Reader.Reset and Writer.Reset work on the zero value
+ 2021-09-10 cf2fe5d6 doc/asm: fix HTML markup
+ 2021-09-10 1bf2cd12 debug/elf: retain original error message when getSymbols fails.
+ 2021-09-10 5a4b9f94 time: reference -tags=timetzdata in testing panic
+ 2021-09-10 025308fe testing: increase alternation precedence
+ 2021-09-10 5a94a90d cmd/compile/internal/types2: better error message for invalid array decls
+ 2021-09-10 da1aa650 cmd/compile/internal/syntax: correct follow token for type parameter lists
+ 2021-09-10 96ab854a cmd/compile/internal: better AST line highlight in ssa.html
+ 2021-09-10 90c56606 embed: guarantee the returned file of FS.Open implements io.Seeker
+ 2021-09-10 c69f5c0d cmd/compile: add support for Abs and Copysign intrinsics on riscv64
+ 2021-09-10 2091bd3f cmd/compile: simiplify arm64 bitfield optimizations
+ 2021-09-09 b32209d2 cmd/compile: fix test case for unified IR (fix build)
+ 2021-09-09 1a708bcf cmd/compile: don't crash while reporting invalid alias cycle
+ 2021-09-09 426ff374 cmd/cgo, runtime/cgo: avoid GCC/clang conversion warnings
+ 2021-09-09 73483df4 cmd/compile/internal/syntax: better error message for missing type constraint
+ 2021-09-09 e1c3f215 time: propagate "," separator for fractional seconds into Format
+ 2021-09-09 c981874a cmd/compile: fix implement for closure in a global assignment
+ 2021-09-09 2c4f389c cmd/link: enable internal linker in more cases for ppc64le
+ 2021-09-09 fb84e99e test: add compiler regress tests for #46461
+ 2021-09-09 b9e1a245 cmd/compile: fix case where init info of OAS node is dropped
+ 2021-09-09 f9271e4f go/types, types2: rename RParams -> RecvTypeParams
+ 2021-09-09 ea434450 reflect: add hooks for dealing with narrow width floats
+ 2021-09-09 a53e3d5f net: deprecate (net.Error).Temporary
+ 2021-09-09 19457a58 cmd/compile: stenciled conversions might be NOPs
+ 2021-09-09 a295b3ce test: re-enable AsmCheck tests for types2-based frontends
+ 2021-09-09 66f0d35f go/types: reduce number of delayed functions
+ 2021-09-09 d2a77f1c go/types: handle recursive type parameter constraints
+ 2021-09-09 9e1eea6f go/types: detect constraint type inference cycles
+ 2021-09-09 b86e8dd0 test/typeparam: fix issue48094b test build
+ 2021-09-09 c84f3a40 syscall: drop fallback to pipe in Pipe on linux/arm
+ 2021-09-09 376a0797 cmd/compile: fix unified IR panic when expanding nested inline function
+ 2021-09-09 6edc5798 internal/poll: report open fds when TestSplicePipePool fails
+ 2021-09-09 2481f6e3 cmd/compile: fix wrong instantiated type for embedded receiver
+ 2021-09-09 d62866ef cmd/compile: move checkptr alignment to SSA generation
+ 2021-09-09 8fad81cd cmd/compile: fold handling OCONV logic to separate function
+ 2021-09-09 9cbc76bd cmd/internal/obj/arm64: add checks for incorrect use of REGTMP register
+ 2021-09-09 42563f89 cmd/compile: remove 'ext' fields from unified IR reader/writer types
+ 2021-09-09 4c52eac4 cmd/compile: simplify value coding for unified IR
+ 2021-09-09 e30a0901 cmd/compile: extrapolate $GOROOT in unified IR
+ 2021-09-08 a1f6208e go/types, types2: add Environment to Config
+ 2021-09-08 f5f8a911 cmd/compile/internal/types2: spell out 'Type' in type parameter APIs
+ 2021-09-08 bff39cf6 cmd/compile: add automated rewrite cycle detection
+ 2021-09-08 b61e1ed8 cmd/compile/internal/types2: temporarily pin the Checker to Interface during checking
+ 2021-09-08 47f3e1e0 cmd/compile/internal/types2: move NewTypeParam off of Checker
+ 2021-09-08 ccc927b8 cmd/compile/internal/types2: move typeHash to environment.go
+ 2021-09-08 30e9bfbc cmd/compile/internal/types2: implement deduplication of instances using the Environment
+ 2021-09-08 0406d3a8 go/ast: rename MultiIndexExpr to IndexListExpr

Change-Id: I7f917d45b0507c122c212305144b0b455618ff54