[Piglit] [PATCH] cl: Add tests for some cases that were broken with function calls

[arsenm2 at gmail.com]

From: Matt Arsenault <arsenm2 at gmail.com>

---
 .../program/execute/call-clobbers-amdgcn.cl   | 102 ++++++++++++++++++
 1 file changed, 102 insertions(+)

diff --git a/tests/cl/program/execute/call-clobbers-amdgcn.cl b/tests/cl/program/execute/call-clobbers-amdgcn.cl
index 18e657ce3..b0a1f8c70 100644
--- a/tests/cl/program/execute/call-clobbers-amdgcn.cl
+++ b/tests/cl/program/execute/call-clobbers-amdgcn.cl
@@ -19,6 +19,49 @@ dimensions: 1
 global_size: 1 0 0
 arg_out: 0 buffer int[1] 0xabcd1234
 
+[test]
+name: Conditional call
+kernel_name: conditional_call
+dimensions: 1
+local_size: 64 0 0
+global_size: 64 0 0
+arg_out: 0 buffer int[64] \
+  0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 \
+  0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 \
+  0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 \
+  0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 \
+  0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 \
+  0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 \
+  0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 \
+  0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234
+
+[test]
+name: Conditional call partial dispatch
+kernel_name: conditional_call
+dimensions: 1
+local_size: 16 0 0
+global_size: 16 0 0
+arg_out: 0 buffer int[16] \
+  0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 \
+  0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234 0xabcd1234
+
+
+[test]
+name: Skip call no lanes
+kernel_name: skip_call_no_lanes
+dimensions: 1
+local_size: 64 0 0
+global_size: 64 0 0
+arg_out: 0 buffer int[64] \
+  123 123 123 123 123 123 123 123 \
+  123 123 123 123 123 123 123 123 \
+  123 123 123 123 123 123 123 123 \
+  123 123 123 123 123 123 123 123 \
+  123 123 123 123 123 123 123 123 \
+  123 123 123 123 123 123 123 123 \
+  123 123 123 123 123 123 123 123 \
+  123 123 123 123 123 123 123 123
+
 !*/
 
 #ifndef __AMDGCN__
@@ -65,3 +108,62 @@ kernel void call_clobber_v40(__global int* ret)
                   : "v40");
     *ret = tmp;
 }
+
+__attribute__((noinline))
+void spill_sgpr_to_csr_vgpr()
+{
+    __asm volatile(
+        "s_nop 1" :::
+        "v0","v1","v2","v3","v4","v5","v6","v7",
+        "v8","v9","v10","v11","v12","v13","v14","v15",
+        "v16","v17","v18","v19","v20","v21","v22","v23",
+        "v24","v25","v26","v27","v28","v29","v30","v31",
+
+        "s0","s1","s2","s3","s4","s5","s6","s7",
+        "s8","s9","s10","s11","s12","s13","s14","s15",
+        "s16","s17","s18","s19","s20","s21","s22","s23",
+        "s24","s25","s26","s27","s28","s29","s30","s31",
+        "s32", "s33", "s34", "s35", "s36", "s37", "s38");
+}
+
+// A CSR VGPR needs to be spilled/restored in the prolog/epilog, but
+// all lanes need to be made active to avoid clobbering lanes that did
+// not enter the call.
+kernel void conditional_call(global int* ret)
+{
+    __asm volatile("v_mov_b32 v32, 0xabcd1234" : : : "v32");
+
+    int id = get_local_id(0);
+    if (id == 0)
+    {
+        spill_sgpr_to_csr_vgpr();
+    }
+
+    int tmp;
+    __asm volatile("v_mov_b32 %0, v32"
+                   : "=v"(tmp)
+                   :
+                   : "v32");
+    ret[id] = tmp;
+}
+
+__attribute__((noinline))
+void hang_if_all_inactive()
+{
+    __builtin_amdgcn_s_sendmsghalt(0, 0);
+}
+
+// If all lanes could be dynamically false, the call must not be taken
+// in case a side effecting scalar op is called inside.
+kernel void skip_call_no_lanes(global int* ret)
+{
+    int divergent_false;
+    __asm volatile("v_mov_b32 %0, 0" : "=v"(divergent_false));
+
+    if (divergent_false)
+    {
+        hang_if_all_inactive();
+    }
+
+    ret[get_global_id(0)] = 123;
+}
-- 
2.17.1