Metal: rewrite global variables as explicit context. (#3981)

* Metal: rewrite global variables as explicit context.

* Small tweaks.

1 files changed, 11 insertions, 4 deletions

diff --git a/tests/metal/simple-compute.slang b/tests/metal/simple-compute.slang
index e099704be..fe797dc2c 100644
--- a/tests/metal/simple-compute.slang
+++ b/tests/metal/simple-compute.slang
@@ -1,10 +1,17 @@
 //TEST:SIMPLE(filecheck=CHECK): -target metal
 
-RWStructuredBuffer<float> outputBuffer;
+uniform RWStructuredBuffer<float> outputBuffer;
+
+// CHECK: {{.*}}kernel{{.*}} void main_kernel(float device* {{.*}})
+
+void func(float v)
+{
+    outputBuffer[0] = v;
+    outputBuffer[1] = outputBuffer.Load(0);
+}
 
-// CHECK: {{.*}}kernel{{.*}} void main()
 [numthreads(1,1,1)]
-void main()
+void main_kernel()
 {
-    outputBuffer[0] = 1.0f;
+    func(3.0f);
 }
\ No newline at end of file