noduplicate-syncthreads.ll
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; RUN: opt < %s -O3 -S | FileCheck %s
; Make sure the call to syncthreads is not duplicate here by the LLVM
; optimizations, because it has the noduplicate attribute set.
; CHECK: call void @llvm.nvvm.barrier0
; CHECK-NOT: call void @llvm.nvvm.barrier0
; Function Attrs: nounwind
define void @foo(float* %output) #1 {
entry:
%output.addr = alloca float*, align 8
store float* %output, float** %output.addr, align 8
%0 = load float*, float** %output.addr, align 8
%arrayidx = getelementptr inbounds float, float* %0, i64 0
%1 = load float, float* %arrayidx, align 4
%conv = fpext float %1 to double
%cmp = fcmp olt double %conv, 1.000000e+01
br i1 %cmp, label %if.then, label %if.else
if.then: ; preds = %entry
%2 = load float*, float** %output.addr, align 8
%3 = load float, float* %2, align 4
%conv1 = fpext float %3 to double
%add = fadd double %conv1, 1.000000e+00
%conv2 = fptrunc double %add to float
store float %conv2, float* %2, align 4
br label %if.end
if.else: ; preds = %entry
%4 = load float*, float** %output.addr, align 8
%5 = load float, float* %4, align 4
%conv3 = fpext float %5 to double
%add4 = fadd double %conv3, 2.000000e+00
%conv5 = fptrunc double %add4 to float
store float %conv5, float* %4, align 4
br label %if.end
if.end: ; preds = %if.else, %if.then
call void @llvm.nvvm.barrier0()
%6 = load float*, float** %output.addr, align 8
%arrayidx6 = getelementptr inbounds float, float* %6, i64 0
%7 = load float, float* %arrayidx6, align 4
%conv7 = fpext float %7 to double
%cmp8 = fcmp olt double %conv7, 1.000000e+01
br i1 %cmp8, label %if.then9, label %if.else13
if.then9: ; preds = %if.end
%8 = load float*, float** %output.addr, align 8
%9 = load float, float* %8, align 4
%conv10 = fpext float %9 to double
%add11 = fadd double %conv10, 3.000000e+00
%conv12 = fptrunc double %add11 to float
store float %conv12, float* %8, align 4
br label %if.end17
if.else13: ; preds = %if.end
%10 = load float*, float** %output.addr, align 8
%11 = load float, float* %10, align 4
%conv14 = fpext float %11 to double
%add15 = fadd double %conv14, 4.000000e+00
%conv16 = fptrunc double %add15 to float
store float %conv16, float* %10, align 4
br label %if.end17
if.end17: ; preds = %if.else13, %if.then9
ret void
}
; Function Attrs: noduplicate nounwind
declare void @llvm.nvvm.barrier0() #2
!0 = !{void (float*)* @foo, !"kernel", i32 1}
!1 = !{null, !"align", i32 8}