Bug fixes for the direct spirv backend. (#3474)

* Fix GLSL legalization bug that leads to crash.

* Update diagnostic id to avoid conflict.

* Fix std140 layout logic.

---------

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/spirv/std140-layout.slang b/tests/spirv/std140-layout.slang
new file mode 100644
index 000000000..9a09dbef3
--- /dev/null
+++ b/tests/spirv/std140-layout.slang
@@ -0,0 +1,17 @@
+
+//TEST:SIMPLE(filecheck=SPIRV): -stage fragment -entry main -target spirv -emit-spirv-directly
+
+// SPIRV: OpMemberDecorate %{{.*}} 0 Offset 0
+// SPIRV: OpMemberDecorate %{{.*}} 1 Offset 16
+// SPIRV: OpMemberDecorate %{{.*}} 2 Offset 28
+
+uniform float3 v0;
+uniform float3 v1;
+uniform float v2;
+
+
+
+float4 main() : SV_Target
+{
+    return float4(v2);
+}