[clang] [HLSL] Apply NoRecurse attrib to all HLSL functions (PR #105907)

[David Peixotto via cfe-commits]

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@@ -0,0 +1,93 @@
+// RUN: %clang_cc1 -x hlsl -triple dxil-pc-shadermodel6.3-library  -finclude-default-header %s -emit-llvm -disable-llvm-passes -o - | FileCheck %s
+// RUN: %clang_cc1 -x hlsl -triple dxil-pc-shadermodel6.0-compute  -finclude-default-header %s -emit-llvm -disable-llvm-passes -o - | FileCheck %s
+
+// Verify that a few different function types all get the NoRecurse attribute
+
+#define MAX 100
+
+struct Node {
+  uint value;
+  uint key;
+  uint left, right;
+};
+
+// CHECK: Function Attrs:{{.*}}norecurse
+// CHECK: define noundef i32 @"?Find@@YAIY0GE at UNode@@I at Z"(ptr noundef byval([100 x %struct.Node]) align 4 %SortedTree, i32 noundef %key) [[IntAttr:\#[0-9]+]]
+// CHECK: ret i32
+// Find and return value corresponding to key in the SortedTree
+uint Find(Node SortedTree[MAX], uint key) {
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dmpots wrote:

Do we need such complicated functions for this test? Does the body matter here or is it really just the internal/external properties that matter. In my opinion, the function body is distracting from the essence of the test here.

https://github.com/llvm/llvm-project/pull/105907