cmd/compile: mark shape type dupok

[zhouguangyuan0718]

What version of Go are you using (go version)?

$ go version
go version devel go1.19-fd6c556dc8 Sat Apr 30 04:04:40 2022 +0000 linux/amd64

Does this issue reproduce with the latest release?

No, it marks all type description dupok in 1.18.

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/mnt/d/01.golang/01.GOPATH/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/mnt/d/01.golang/02.playground/01.demo/playground/dwarftype/gopath/"
GOPRIVATE=""
GOPROXY="https://goproxy.cn,direct"
GOROOT="/mnt/d/01.golang/03.godev/go"
GOSUMDB="off"
GOTMPDIR=""
GOTOOLDIR="/mnt/d/01.golang/03.godev/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="devel go1.19-fd6c556dc8 Sat Apr 30 04:04:40 2022 +0000"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/mnt/d/01.golang/02.playground/01.demo/playground/dwarftype/go.mod"
GOWORK=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build3478615306=/tmp/go-build -gno-record-gcc-switches"

What did you do?

go install -buildmode=shared -linkshared std

What did you expect to see?

Success.

What did you see instead?

# /tmp/go-build415098603/b236/libstd.so
2022/04/30 22:37:52 duplicated definition of symbol type.go.shape.*uint8_0, from crypto/tls and crypto/elliptic

[gopherbot]

Change https://go.dev/cl/403316 mentions this issue: cmd/compile: mark shape type dupok

[dr2chase]

Marked it "needs investigation" to get it off the dashboard, but it is a bug, repros just fine for me, the fix looks sensible, and I pinged the likely reviewers.

[randall77]

@gopherbot please open a backport issue for 1.18.

[gopherbot]

Backport issue(s) opened: #52687 (for 1.18).

Remember to create the cherry-pick CL(s) as soon as the patch is submitted to master, according to https://go.dev/wiki/MinorReleases.