cmd/compile: fix incorrect go:noinline usage

This pragma is not actually honored by the compiler.
The tests implicitly relied on the inliner being unable
to inline closures with captured variables, which will
soon change.

Fixes #22208

Change-Id: I13abc9c930b9156d43ec216f8efb768952a29439
Reviewed-on: https://go-review.googlesource.com/73211Reviewed-by: Michael Munday <mike.munday@ibm.com>

src/cmd/compile/internal/gc/asm_test.go

@@ -242,7 +242,7 @@ var allAsmTests = []*asmTests{
 	{
 		arch:    "arm",
 		os:      "linux",
-		imports: []string{"math/bits"},
+		imports: []string{"math/bits", "runtime"},
 		tests:   linuxARMTests,
 	},
 	{
@@ -1020,12 +1020,11 @@ var linuxAMD64Tests = []*asmTest{
 		// make sure assembly output has matching offset and base register.
 		fn: `
 		func f72(a, b int) int {
-			//go:noinline
-			func() {_, _ = a, b} () // use some frame
+			runtime.GC() // use some frame
 			return b
 		}
 		`,
-		pos: []string{"b\\+40\\(SP\\)"},
+		pos: []string{"b\\+24\\(SP\\)"},
 	},
 	{
 		// check load combining
@@ -1803,8 +1802,7 @@ var linuxARMTests = []*asmTest{
 		// make sure assembly output has matching offset and base register.
 		fn: `
 		func f13(a, b int) int {
-			//go:noinline
-			func() {_, _ = a, b} () // use some frame
+			runtime.GC() // use some frame
 			return b
 		}
 		`,