Make fvk-invert-y work on mesh shader ouptuts. (#5760)

Co-authored-by: Ellie Hermaszewska <ellieh@nvidia.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/spirv/mesh-shader-invert-y.slang b/tests/spirv/mesh-shader-invert-y.slang
new file mode 100644
index 000000000..e385167ae
--- /dev/null
+++ b/tests/spirv/mesh-shader-invert-y.slang
@@ -0,0 +1,24 @@
+//TEST:SIMPLE(filecheck=CHECK): -target spirv -fvk-invert-y
+
+// CHECK: %[[CONST:[0-9]+]] = OpConstantComposite %v4float %float_0 %float_n1 %float_0 %float_0
+// CHECK: OpStore {{.*}} %[[CONST]]
+
+struct PS_IN
+{
+	float4 vPositionPs : SV_Position;
+};
+
+[ shader("mesh") ]
+[ outputtopology( "line" ) ]
+[ numthreads( 64, 1, 1 ) ]
+void main(
+	uint nThreadId : SV_DispatchThreadID,
+	uint nGroupThreadId : SV_GroupThreadID,
+	uint nGroupId : SV_GroupID,
+	out vertices PS_IN outputVerts[ 128 ],
+	out indices uint2 outputIB[ 64  ] )
+{
+	SetMeshOutputCounts( 128, 64 );
+
+    outputVerts[ 2 * nGroupThreadId ].vPositionPs = float4( 0, 1, 0, 0 );
+}