TailDuplication-convergent.ll
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; RUN: llc -O2 -tail-dup-size=100 -enable-tail-merge=0 < %s | FileCheck %s
target triple = "nvptx64-nvidia-cuda"
declare void @foo()
declare void @llvm.nvvm.barrier0()
; syncthreads shouldn't be duplicated.
; CHECK: .func call_syncthreads
; CHECK: bar.sync
; CHECK-NOT: bar.sync
define void @call_syncthreads(i32* %a, i32* %b, i1 %cond, i1 %cond2) nounwind {
br i1 %cond, label %L1, label %L2
br i1 %cond2, label %Ret, label %L1
Ret:
ret void
L1:
store i32 0, i32* %a
br label %L42
L2:
store i32 1, i32* %a
br label %L42
L42:
call void @llvm.nvvm.barrier0()
br label %Ret
}
; Check that call_syncthreads really does trigger tail duplication.
; CHECK: .func call_foo
; CHECK: call
; CHECK: call
define void @call_foo(i32* %a, i32* %b, i1 %cond, i1 %cond2) nounwind {
br i1 %cond, label %L1, label %L2
br i1 %cond2, label %Ret, label %L1
Ret:
ret void
L1:
store i32 0, i32* %a
br label %L42
L2:
store i32 1, i32* %a
br label %L42
L42:
call void @foo()
br label %Ret
}