[branch] and [flatten] support (#2928)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Small fixes and improvements around reflection tool.

* Make PrettyWriter printing a class.

* Add HLSL output support for [flatten] and [branch]

* Handle [branch] on switch.

2 files changed, 53 insertions, 0 deletions

diff --git a/tests/bugs/branch-attribute.slang b/tests/bugs/branch-attribute.slang
new file mode 100644
index 000000000..17e30a278
--- /dev/null
+++ b/tests/bugs/branch-attribute.slang
@@ -0,0 +1,29 @@
+//TEST:SIMPLE(filecheck=CHECK): -target hlsl -profile cs_5_0 -entry computeMain
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name outputBuffer
+RWStructuredBuffer<int> outputBuffer;
+
+// CHECK: [branch]
+// CHECK: [flatten]
+
+[numthreads(4, 1, 1)]
+void computeMain(int3 dispatchThreadID : SV_DispatchThreadID)
+{
+    int idx = dispatchThreadID.x;
+    
+    int v = idx;
+    
+    [branch]
+    if (idx != 0)
+    {
+        ++v;
+    }
+    
+    [flatten]
+    if (idx > 2)
+    {
+        v += v;
+    }
+
+	outputBuffer[dispatchThreadID.x] = v;
+}
\ No newline at end of file
diff --git a/tests/bugs/branch-switch-attribute.slang b/tests/bugs/branch-switch-attribute.slang
new file mode 100644
index 000000000..761b80e9e
--- /dev/null
+++ b/tests/bugs/branch-switch-attribute.slang
@@ -0,0 +1,24 @@
+//TEST:SIMPLE(filecheck=CHECK): -target hlsl -profile cs_5_0 -entry computeMain
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name outputBuffer
+RWStructuredBuffer<int> outputBuffer;
+
+// CHECK: [branch]
+
+[numthreads(4, 1, 1)]
+void computeMain(int3 dispatchThreadID : SV_DispatchThreadID)
+{
+    int idx = dispatchThreadID.x;
+    
+    int v = idx;
+   
+   [branch]
+    switch (idx)
+    {
+        case 0: v ++; break;
+        case 2: v -= 7; break;
+        default: v--;
+    }
+
+	outputBuffer[dispatchThreadID.x] = v;
+}
\ No newline at end of file