[clang] [AMDGPU] Lower __builtin_amdgcn_read_exec_hi to use amdgcn_ballot (PR #69567)

[Matt Arsenault via cfe-commits]

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@@ -526,7 +526,9 @@ void test_read_exec_lo(global uint* out) {
 // CHECK: declare i32 @llvm.amdgcn.ballot.i32(i1) #[[$NOUNWIND_READONLY:[0-9]+]]
 
 // CHECK-LABEL: @test_read_exec_hi(
-// CHECK: call i32 @llvm.amdgcn.ballot.i32(i1 true)
+// CHECK: call i64 @llvm.amdgcn.ballot.i64(i1 true)
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arsenm wrote:

needs wave32 and wave64 tests. These ballot tests belong in builtins-amdgcn-wave32.cl and builtins-amdgcn-wave64.cl

https://github.com/llvm/llvm-project/pull/69567