go/types, types2: wrong result of float add float #48315
Description
What version of Go are you using (go version)?
$ go version go version go1.17.1 darwin/arm64
Does this issue reproduce with the latest release?
What operating system and processor architecture are you using (go env)?
go env Output
$ go env GO111MODULE="on" GOARCH="arm64" GOBIN="/bin" GOCACHE="/Users/wang/Library/Caches/go-build" GOENV="/Users/wang/Library/Application Support/go/env" GOEXE="" GOEXPERIMENT="" GOFLAGS="" GOHOSTARCH="arm64" GOHOSTOS="darwin" GOINSECURE="" GOMODCACHE="/Users/wang/go/pkg/mod" GONOPROXY="gitlab.hexcloud.cn" GONOSUMDB="gitlab.hexcloud.cn" GOOS="darwin" GOPATH="/Users/wang/go" GOPRIVATE="gitlab.hexcloud.cn" GOPROXY="https://goproxy.io,direct" GOROOT="/usr/local/go" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/usr/local/go/pkg/tool/darwin_arm64" GOVCS="" GOVERSION="go1.17.1" GCCGO="gccgo" AR="ar" CC="clang" CXX="clang++" CGO_ENABLED="1" GOMOD="/dev/null" CGO_CFLAGS="-g -O2" CGO_CPPFLAGS="" CGO_CXXFLAGS="-g -O2" CGO_FFLAGS="-g -O2" CGO_LDFLAGS="-g -O2" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/fc/5_f38pyn6k915kw7_vvfjhrc0000gn/T/go-build63379070=/tmp/go-build -gno-record-gcc-switches -fno-common" GOROOT/bin/go version: go version go1.17.1 darwin/arm64 GOROOT/bin/go tool compile -V: compile version go1.17.1 uname -v: Darwin Kernel Version 20.6.0: Wed Jun 23 00:26:27 PDT 2021; root:xnu-7195.141.2~5/RELEASE_ARM64_T8101 ProductName: macOS ProductVersion: 11.5.1 BuildVersion: 20G80 lldb --version: lldb-1205.0.28.2 Apple Swift version 5.4.2 (swiftlang-1205.0.28.2 clang-1205.0.19.57)
What did you do?
https://go2goplay.golang.org/p/y9mwmrSPe16
What did you expect to see?
3
foobar
3.33
What did you see instead?
3
foobar
3.3000000000000003