MSL: Return fragment function value even when last SPIR-V Op is discard (OpKill).

Add test shader for new functionality.
Add legacy test reference shader for unrelated buffer-bitcast
test, that doesn't seem to have been added previously.

2 files changed, 47 insertions, 0 deletions

diff --git a/reference/opt/shaders-msl/frag/return-value-after-discard-terminator.frag b/reference/opt/shaders-msl/frag/return-value-after-discard-terminator.frag
new file mode 100644
index 00000000..92097dfa
--- /dev/null
+++ b/reference/opt/shaders-msl/frag/return-value-after-discard-terminator.frag
@@ -0,0 +1,25 @@
+#include <metal_stdlib>
+#include <simd/simd.h>
+
+using namespace metal;
+
+struct buff_t
+{
+    int m0[1024];
+};
+
+struct main0_out
+{
+    float4 frag_clr [[color(0)]];
+};
+
+fragment main0_out main0(device buff_t& buff [[buffer(0)]], float4 gl_FragCoord [[position]])
+{
+    main0_out out = {};
+    int4 _16 = int4(gl_FragCoord);
+    out.frag_clr = float4(0.0, 0.0, 1.0, 1.0);
+    buff.m0[(_16.y * 32) + _16.x] = 1;
+    discard_fragment();
+    return out;
+}
+
diff --git a/reference/opt/shaders/vulkan/comp/buffer-reference-bitcast-uvec2-2.nocompat.invalid.vk.comp.vk b/reference/opt/shaders/vulkan/comp/buffer-reference-bitcast-uvec2-2.nocompat.invalid.vk.comp.vk
new file mode 100644
index 00000000..53c3d21c
--- /dev/null
+++ b/reference/opt/shaders/vulkan/comp/buffer-reference-bitcast-uvec2-2.nocompat.invalid.vk.comp.vk
@@ -0,0 +1,22 @@
+#version 450
+#extension GL_EXT_buffer_reference : require
+#extension GL_EXT_buffer_reference_uvec2 : require
+layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
+
+layout(buffer_reference) buffer PtrInt;
+layout(buffer_reference, std430) buffer PtrInt
+{
+    int value;
+};
+
+layout(set = 0, binding = 0, std430) buffer Buf
+{
+    uvec2 ptr;
+    PtrInt ptrint;
+} _13;
+
+void main()
+{
+    _13.ptr = uvec2(_13.ptrint);
+}
+