[llvm] fe13002 - [HLSL] Add __builtin_hlsl_create_handle

[Chris Bieneman via llvm-commits]

Author: Chris Bieneman
Date: 2022-07-28T09:16:11-05:00
New Revision: fe13002bb37caf7425dfdb56b8f891c3f33b54b6

URL: https://github.com/llvm/llvm-project/commit/fe13002bb37caf7425dfdb56b8f891c3f33b54b6
DIFF: https://github.com/llvm/llvm-project/commit/fe13002bb37caf7425dfdb56b8f891c3f33b54b6.diff

LOG: [HLSL] Add __builtin_hlsl_create_handle

This is pretty straightforward, it just adds a builtin to return a
pointer to a resource handle. This maps to a dx intrinsic.

The shape of this builtin and the underlying intrinsic will likely
shift a bit as this implementation becomes more feature complete, but
this is a good basis to get started.

Depends on D128569.

Differential Revision: https://reviews.llvm.org/D130016

Added: 
    clang/test/CodeGenHLSL/builtins/create_handle.hlsl

Modified: 
    clang/include/clang/Basic/Builtins.def
    llvm/include/llvm/IR/IntrinsicsDirectX.td

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/Basic/Builtins.def b/clang/include/clang/Basic/Builtins.def
index f19807dbbb0bb..c67f0dfe9ab04 100644
--- a/clang/include/clang/Basic/Builtins.def
+++ b/clang/include/clang/Basic/Builtins.def
@@ -1700,6 +1700,7 @@ LANGBUILTIN(__builtin_get_device_side_mangled_name, "cC*.", "ncT", CUDA_LANG)
 
 // HLSL
 LANGBUILTIN(__builtin_hlsl_wave_active_count_bits, "Uib", "nc", HLSL_LANG)
+LANGBUILTIN(__builtin_hlsl_create_handle, "v*Uc", "nc", HLSL_LANG)
 
 // Builtins for XRay
 BUILTIN(__xray_customevent, "vcC*z", "")

diff  --git a/clang/test/CodeGenHLSL/builtins/create_handle.hlsl b/clang/test/CodeGenHLSL/builtins/create_handle.hlsl
new file mode 100644
index 0000000000000..61226c2b54e72
--- /dev/null
+++ b/clang/test/CodeGenHLSL/builtins/create_handle.hlsl
@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -x hlsl -emit-llvm -disable-llvm-passes -o - %s | FileCheck %s
+
+void fn() {
+  (void)__builtin_hlsl_create_handle(0);
+}
+
+// CHECK: call ptr @llvm.dx.create.handle(i8 0)

diff  --git a/llvm/include/llvm/IR/IntrinsicsDirectX.td b/llvm/include/llvm/IR/IntrinsicsDirectX.td
index 57c47a15bd70a..80e5b7919b9c6 100644
--- a/llvm/include/llvm/IR/IntrinsicsDirectX.td
+++ b/llvm/include/llvm/IR/IntrinsicsDirectX.td
@@ -17,4 +17,6 @@ def int_dx_group_id : Intrinsic<[llvm_i32_ty], [llvm_i32_ty], [IntrNoMem, IntrWi
 def int_dx_thread_id_in_group : Intrinsic<[llvm_i32_ty], [llvm_i32_ty], [IntrNoMem, IntrWillReturn]>;
 def int_dx_flattened_thread_id_in_group : Intrinsic<[llvm_i32_ty], [], [IntrNoMem, IntrWillReturn]>;
 
+def int_dx_create_handle : ClangBuiltin<"__builtin_hlsl_create_handle">,
+    Intrinsic<[ llvm_ptr_ty ], [llvm_i8_ty], [IntrNoMem, IntrWillReturn]>;
 }