[clang] [clang][AMDGPU] fix the return type for ballot (PR #73906)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Sameer Sahasrabuddhe (ssahasra)

<details>
<summary>Changes</summary>

In the builtins declaration, "ULi" is a 32-bit integer on Windows. Use "WUi" instead to ensure a 64-bit integer on all platforms.


---
Full diff: https://github.com/llvm/llvm-project/pull/73906.diff


2 Files Affected:

- (modified) clang/include/clang/Basic/BuiltinsAMDGPU.def (+2-2) 
- (added) clang/test/CodeGenHIP/ballot.cpp (+15) 


``````````diff
diff --git a/clang/include/clang/Basic/BuiltinsAMDGPU.def b/clang/include/clang/Basic/BuiltinsAMDGPU.def
index a19c8bd5f219ec6..8b59b3790d7bc66 100644
--- a/clang/include/clang/Basic/BuiltinsAMDGPU.def
+++ b/clang/include/clang/Basic/BuiltinsAMDGPU.def
@@ -150,8 +150,8 @@ BUILTIN(__builtin_amdgcn_mqsad_u32_u8, "V4UiWUiUiV4Ui", "nc")
 // Ballot builtins.
 //===----------------------------------------------------------------------===//
 
-TARGET_BUILTIN(__builtin_amdgcn_ballot_w32, "Uib", "nc", "wavefrontsize32")
-TARGET_BUILTIN(__builtin_amdgcn_ballot_w64, "LUib", "nc", "wavefrontsize64")
+TARGET_BUILTIN(__builtin_amdgcn_ballot_w32, "ZUib", "nc", "wavefrontsize32")
+TARGET_BUILTIN(__builtin_amdgcn_ballot_w64, "WUib", "nc", "wavefrontsize64")
 
 // Deprecated intrinsics in favor of __builtin_amdgn_ballot_{w32|w64}
 BUILTIN(__builtin_amdgcn_uicmp, "WUiUiUiIi", "nc")
diff --git a/clang/test/CodeGenHIP/ballot.cpp b/clang/test/CodeGenHIP/ballot.cpp
new file mode 100644
index 000000000000000..5685c5cad30d66a
--- /dev/null
+++ b/clang/test/CodeGenHIP/ballot.cpp
@@ -0,0 +1,15 @@
+// REQUIRES: amdgpu-registered-target
+// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -target-cpu gfx900 -x hip -emit-llvm -fcuda-is-device -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple amdgcn-amd-amdhsa -target-cpu gfx900 -x hip -S -fcuda-is-device -o - %s | FileCheck %s --check-prefix=GFX9
+
+// CHECK-LABEL: @_Z3fooi
+// CHECK: call i64 @llvm.amdgcn.ballot.i64
+
+// GFX9-LABEL: _Z3fooi:
+// GFX9: v_cmp_ne_u32_e64
+
+#define __device__ __attribute__((device))
+
+__device__ unsigned long long foo(int p) {
+  return __builtin_amdgcn_ballot_w64(p);
+}

``````````

</details>


https://github.com/llvm/llvm-project/pull/73906