add template test case for checking if the shader flags are set

Author: inbelic

llvm/test/CodeGen/DirectX/ShaderFlags/wave-ops.ll

@@ -0,0 +1,15 @@
+; RUN: opt -S --passes="print-dx-shader-flags" 2>&1 %s | FileCheck %s
+;
+; CHECK: ; Shader Flags Value: 0x00080000
+; CHECK: ; Note: shader requires additional functionality:
+; CHECK-NEXT: ;       Wave level operations
+; CHECK-NEXT: ; Note: extra DXIL module flags:
+; CHECK-NEXT: {{^;$}}
+
+target triple = "dxil-pc-shadermodel6.7-library"
+
+define noundef half @wave_rla_half(half noundef %expr, i32 noundef %idx) {
+entry:
+  %ret = call half @llvm.dx.wave.readlane.f16(half %expr, i32 %idx)
+  ret half %ret
+}