[Mono][Win] Incorrect decomposition of simd calls (#116433)

* Incorrect decomposition of simd calls

simd decomposition for OP_ARG cases for simd calls in handled
incorrectly
currently the decomposition intrinsic takes place based on a xcall but
later on this xcall is decomposed into a vcall where the return register
is removed.

fixes #116287

* add missing semicolon

---------

Co-authored-by: Larry Ewing <[email protected]>

Author: saitama951

src/mono/mono/mini/simd-intrinsics.c

@@ -6717,21 +6717,29 @@ mono_emit_common_intrinsics (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSi
 static gboolean
 decompose_vtype_opt_uses_simd_intrinsics (MonoCompile *cfg, MonoInst *ins)
 {
-	if (cfg->uses_simd_intrinsics)
-		return TRUE;
+    switch (ins->opcode) {
+        case OP_XCALL:
+        case OP_XCALL_REG:
+        case OP_XCALL_MEMBASE:
+            return FALSE;
+    }
+
+    if (cfg->uses_simd_intrinsics)
+        return TRUE;
+
+    switch (ins->opcode) {
+    case OP_XMOVE:
+    case OP_XZERO:
+    case OP_XPHI:
+    case OP_LOADX_MEMBASE:
+    case OP_LOADX_ALIGNED_MEMBASE:
+    case OP_STOREX_MEMBASE:
+    case OP_STOREX_ALIGNED_MEMBASE_REG:
+        return TRUE;
+    default:
+        return FALSE;
+    }
 
-	switch (ins->opcode) {
-	case OP_XMOVE:
-	case OP_XZERO:
-	case OP_XPHI:
-	case OP_LOADX_MEMBASE:
-	case OP_LOADX_ALIGNED_MEMBASE:
-	case OP_STOREX_MEMBASE:
-	case OP_STOREX_ALIGNED_MEMBASE_REG:
-		return TRUE;
-	default:
-		return FALSE;
-	}
 }
 
 static void