Support implciit casted swizzled lvalue. (#3077)

* Support implciit casted swizzled lvalue.

* Fix warnings.

* Fix.

* fix comment.

* Prefer mangled linkage name for global params.

* Update tests.

---------

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

1 files changed, 18 insertions, 0 deletions

diff --git a/tests/bugs/implicit-cast.slang b/tests/bugs/implicit-cast.slang
new file mode 100644
index 000000000..2ee62cc87
--- /dev/null
+++ b/tests/bugs/implicit-cast.slang
@@ -0,0 +1,18 @@
+//TEST(compute):COMPARE_COMPUTE:-vk -shaderobj
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name gBuffer
+RWStructuredBuffer<int> gBuffer;
+
+int getX(int4 v) { return v.x; }
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 tid: SV_DispatchThreadID, uint GI: SV_GroupIndex)
+{
+    if (GI< 1)
+    {
+        uint LdsCoord = GI;
+        uint a = gBuffer[LdsCoord];
+        LdsCoord += 1;
+        gBuffer[LdsCoord] = 1;
+    }
+}