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[dev.typeparams] test: skip -G=3 testing under GOEXPERIMENT=unified

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In normal build configurations, we test both -G=0 and -G=3 so that we
can test both typecheck and types2. However, GOEXPERIMENT=unified
always uses types2, so testing both is redundant.

Change-Id: I697d2ad916d8b17cfaf4f0b6b32eec380d4e7906
Reviewed-on: https://go-review.googlesource.com/c/go/+/330755
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Trust: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Matthew Dempsky 2021-06-24 14:32:21 -07:00
parent 808dca3b2d
commit 75ad323773
1 changed files with 39 additions and 24 deletions
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59
test/run.go
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@ -42,13 +42,36 @@ var (
linkshared = flag.Bool("linkshared", false, "")
updateErrors = flag.Bool("update_errors", false, "update error messages in test file based on compiler output")
runoutputLimit = flag.Int("l", defaultRunOutputLimit(), "number of parallel runoutput tests to run")
generics = flag.String("G", "0,3", "a comma-separated list of -G compiler flags to test with")
force = flag.Bool("f", false, "run expected-failure generics tests rather than skipping them")
generics = flag.String("G", defaultGLevels, "a comma-separated list of -G compiler flags to test with")
shard = flag.Int("shard", 0, "shard index to run. Only applicable if -shards is non-zero.")
shards = flag.Int("shards", 0, "number of shards. If 0, all tests are run. This is used by the continuous build.")
)
var unifiedEnabled, defaultGLevels = func() (bool, string) {
// TODO(mdempsky): Change this to just "go env GOEXPERIMENT" after
// CL 328751 is merged back to dev.typeparams. In the mean time, we
// infer whether the "unified" experiment is default enabled by
// inspecting the output from `go tool compile -V`.
output := runOutput(goTool(), "tool", "compile", "-V")
// TODO(mdempsky): This will give false negatives if the unified
// experiment is enabled by default, but presumably at that point we
// won't need to disable tests for it anymore anyway.
enabled := strings.Contains(output, "unified")
// Normal test runs should test with both -G=0 and -G=3 for types2
// coverage. But the unified experiment always uses types2, so
// testing with -G=3 is redundant.
glevels := "0,3"
if enabled {
glevels = "0"
}
return enabled, glevels
}()
// defaultAllCodeGen returns the default value of the -all_codegen
// flag. By default, we prefer to be fast (returning false), except on
// the linux-amd64 builder that's already very fast, so we get more
@ -60,7 +83,6 @@ func defaultAllCodeGen() bool {
var (
goos, goarch string
cgoEnabled bool
unifiedEnabled bool
// dirs are the directories to look for *.go files in.
// TODO(bradfitz): just use all directories?
@ -97,26 +119,8 @@ func main() {
goos = getenv("GOOS", runtime.GOOS)
goarch = getenv("GOARCH", runtime.GOARCH)
cgoCmd := exec.Command(goTool(), "env", "CGO_ENABLED")
cgoEnv, err := cgoCmd.Output()
if err != nil {
log.Fatalf("running %v: %v", cgoCmd, err)
}
cgoEnabled, _ = strconv.ParseBool(strings.TrimSpace(string(cgoEnv)))
// TODO(mdempsky): Change this to just "go env GOEXPERIMENT" after
// CL 328751 is merged back to dev.typeparams. In the mean time, we
// infer whether the "unified" experiment is defult enabled by
// inspecting the output from `go tool compile -V`.
compileCmd := exec.Command(goTool(), "tool", "compile", "-V")
compileOutput, err := compileCmd.Output()
if err != nil {
log.Fatalf("running %v: %v", compileCmd, err)
}
// TODO(mdempsky): This will give false negatives if the unified
// experiment is enabled by default, but presumably at that point we
// won't need to disable tests for it anymore anyway.
unifiedEnabled = strings.Contains(string(compileOutput), "unified")
cgoEnv := runOutput(goTool(), "env", "CGO_ENABLED")
cgoEnabled, _ = strconv.ParseBool(strings.TrimSpace(cgoEnv))
findExecCmd()
@ -203,6 +207,17 @@ func main() {
}
}
// runOutput runs the specified command and returns its output as a
// string. If the command fails, runOutput logs the error and exits.
func runOutput(name string, args ...string) string {
cmd := exec.Command(name, args...)
output, err := cmd.Output()
if err != nil {
log.Fatalf("running %v: %v", cmd, err)
}
return string(output)
}
// goTool reports the path of the go tool to use to run the tests.
// If possible, use the same Go used to run run.go, otherwise
// fallback to the go version found in the PATH.