cmd/compile/internal/test: verify inlining for mutex fast paths

Change-Id: I17568a898ea8514c7b32d2f48c44365ae37cf898
Reviewed-on: https://go-review.googlesource.com/c/go/+/670195
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Rhys Hiltner <rhys.hiltner@gmail.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

diff --git a/src/cmd/compile/internal/test/inl_test.go b/src/cmd/compile/internal/test/inl_test.go
index 619c57874ffd10c8c798bcf6c880e839dff3694f..091933e1e75ed25ebf20ee1e9710d6cba7facf30 100644 (file)
--- a/src/cmd/compile/internal/test/inl_test.go
+++ b/src/cmd/compile/internal/test/inl_test.go
@@ -284,6 +284,25 @@ func TestIntendedInlining(t *testing.T) {
                }
        }
 
+       if runtime.GOARCH != "wasm" {
+               // mutex implementation for multi-threaded GOARCHes
+               want["runtime"] = append(want["runtime"],
+                       // in the fast paths of lock2 and unlock2
+                       "key8",
+                       "(*mLockProfile).store",
+               )
+               if bits.UintSize == 64 {
+                       // these use 64-bit arithmetic, which is hard to inline on 32-bit platforms
+                       want["runtime"] = append(want["runtime"],
+                               // in the fast paths of lock2 and unlock2
+                               "mutexSampleContention",
+
+                               // in a slow path of lock2, but within the critical section
+                               "(*mLockProfile).end",
+                       )
+               }
+       }
+
        // Functions that must actually be inlined; they must have actual callers.
        must := map[string]bool{
                "compress/flate.byLiteral.Len":  true,