[gcc r14-9695] gcc/testsuite/go.test: update issue16016

[Ian Lance Taylor]

https://gcc.gnu.org/g:9ff034fcff8ccab6eb82bf2cd36e2d24b2df9b78

commit r14-9695-g9ff034fcff8ccab6eb82bf2cd36e2d24b2df9b78
Author: Ian Lance Taylor <iant@golang.org>
Date:   Wed Mar 27 11:44:42 2024 -0700

    gcc/testsuite/go.test: update issue16016
    
    This backports https://go.dev/cl/574536 into the GCC testsuite.
    
    Fixes PR go/114453

Diff:
---
 gcc/testsuite/go.test/test/fixedbugs/issue16016.go | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/gcc/testsuite/go.test/test/fixedbugs/issue16016.go b/gcc/testsuite/go.test/test/fixedbugs/issue16016.go
index e738e1dba0e..b1947f5548d 100644
--- a/gcc/testsuite/go.test/test/fixedbugs/issue16016.go
+++ b/gcc/testsuite/go.test/test/fixedbugs/issue16016.go
@@ -6,7 +6,10 @@
 
 package main
 
-import "time"
+import (
+	"runtime"
+	"time"
+)
 
 type T struct{}
 
@@ -24,8 +27,19 @@ type Q interface {
 }
 
 func main() {
+	var count = 10000
+	if runtime.Compiler == "gccgo" {
+		// On targets without split-stack libgo allocates
+		// a large stack for each goroutine. On 32-bit
+		// systems this test can run out of memory.
+		const intSize = 32 << (^uint(0) >> 63) // 32 or 64
+		if intSize < 64 {
+			count = 100
+		}
+	}
+
 	var q Q = &R{&T{}}
-	for i := 0; i < 10000; i++ {
+	for i := 0; i < count; i++ {
 		go func() {
 			defer q.Foo([]interface{}{"meow"})
 			time.Sleep(100 * time.Millisecond)