From 6d5ef9b650a9db35f7774ca09d9225d0c30849e4 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Tue, 11 Jun 2024 00:01:12 -0700
Subject: Fix `GetAttributeAtVertex` for spirv and glsl targets. (#4334)

---
 tests/diagnostics/get-vertex-attribute.slang | 13 +++++++++++++
 tests/spirv/get-vertex-attribute.slang       | 15 +++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 tests/diagnostics/get-vertex-attribute.slang
 create mode 100644 tests/spirv/get-vertex-attribute.slang

(limited to 'tests')

diff --git a/tests/diagnostics/get-vertex-attribute.slang b/tests/diagnostics/get-vertex-attribute.slang
new file mode 100644
index 000000000..613a5a7c8
--- /dev/null
+++ b/tests/diagnostics/get-vertex-attribute.slang
@@ -0,0 +1,13 @@
+//TEST:SIMPLE(filecheck=CHECK): -target spirv
+
+struct VertexOutput
+{
+    float color;
+}
+
+[shader("fragment")]
+float4 fsmain(VertexOutput vout) : SV_Target
+{
+    // CHECK: ([[# @LINE+1]]): error 39027
+    return GetAttributeAtVertex(vout.color, 0); // error: color must be decorated with `nointerpolation`.
+}
diff --git a/tests/spirv/get-vertex-attribute.slang b/tests/spirv/get-vertex-attribute.slang
new file mode 100644
index 000000000..655b7ad03
--- /dev/null
+++ b/tests/spirv/get-vertex-attribute.slang
@@ -0,0 +1,15 @@
+//TEST:SIMPLE(filecheck=CHECK): -target spirv
+//TEST:SIMPLE(filecheck=CHECK): -target spirv -emit-spirv-via-glsl
+
+// CHECK: OpDecorate %vout_vertexID{{.*}} PerVertexKHR
+
+struct VertexOutput
+{
+    nointerpolation int vertexID;
+}
+
+[shader("fragment")]
+float4 fsmain(VertexOutput vout) : SV_Target
+{
+    return GetAttributeAtVertex(vout.vertexID, 0);
+}
-- 
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