From 80ddf40274fdca93f2ae95a247ff3af122aec6ac Mon Sep 17 00:00:00 2001
From: "James Helferty (NVIDIA)" <jhelferty@nvidia.com>
Date: Wed, 27 Aug 2025 20:08:54 -0700
Subject: Add SPIRV OpCapability for 8/16bit use in storage (#8194)

Emits the appropriate OpCapability for 8- and 16-bit type usage:
- UniformAndStorageBuffer8BitAccess: for 16-bit types in
SpvStorageClassUniform and SpvStorageClassStorageBuffer
- UniformAndStorageBuffer16BitAccess: for 16-bit types in
SpvStorageClassUniform and SpvStorageClassStorageBuffer
- StoragePushConstant8: for 8-bit types in SpvStorageClassPushConstant
- StoragePushConstant16: for 16-bit types in SpvStorageClassPushConstant
- StorageInputOutput16: for 16-bit types in SpvStorageClassInput and
SpvStorageClassOutput

Generated with Claude Code, with revisions.

Fixes #7879.

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: James Helferty (NVIDIA) <jhelferty-nv@users.noreply.github.com>
Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>
---
 tests/spirv/capability-storage-input-output.slang | 44 +++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 tests/spirv/capability-storage-input-output.slang

(limited to 'tests/spirv/capability-storage-input-output.slang')

diff --git a/tests/spirv/capability-storage-input-output.slang b/tests/spirv/capability-storage-input-output.slang
new file mode 100644
index 000000000..0cccd26c7
--- /dev/null
+++ b/tests/spirv/capability-storage-input-output.slang
@@ -0,0 +1,44 @@
+//TEST:SIMPLE(filecheck=CHECK16): -target spirv -profile spirv_1_3 -DIN_HALF
+//TEST:SIMPLE(filecheck=CHECK16): -target spirv -profile spirv_1_3 -DIN_UINT16
+//TEST:SIMPLE(filecheck=CHECK16): -target spirv -profile spirv_1_3 -DOUT_HALF
+//TEST:SIMPLE(filecheck=CHECK): -target spirv -profile spirv_1_3
+
+//CHECK16: OpCapability StorageInputOutput16
+//CHECK-NOT: OpCapability StorageInputOutput16
+
+struct VertexInput {
+#ifdef IN_HALF
+    half4 position : POSITION;
+#else
+    float4 position : POSITION;
+#endif
+#ifdef IN_UINT16
+    uint16_t id : ID;
+#else
+    uint32_t id : ID;
+#endif
+};
+
+#ifdef OUT_HALF
+#define OUT_TYPE half4
+#else
+#define OUT_TYPE float4
+#endif
+
+struct VertexOutput {
+    float4 position : SV_POSITION;
+    OUT_TYPE color : COLOR;
+};
+
+[shader("vertex")]
+VertexOutput vertexMain(VertexInput input)
+{
+    VertexOutput output;
+    output.position = float4(input.position);
+    if (input.id == 0) {
+        output.color = OUT_TYPE(input.position);
+    } else {
+        output.color = OUT_TYPE(0);
+    }
+    return output;
+}
-- 
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