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; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s
; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s
; RUN: %if ptxas && !ptxas-12.0 %{ llc < %s -march=nvptx -mcpu=sm_20 | %ptxas-verify %}
; RUN: %if ptxas %{ llc < %s -march=nvptx64 -mcpu=sm_20 | %ptxas-verify %}
; Use bar.sync to arrive at a pre-computed barrier number and
; wait for all threads in CTA to also arrive:
define ptx_device void @test_barrier_named_cta() {
; CHECK: mov.u32 %r[[REG0:[0-9]+]], 0;
; CHECK: bar.sync %r[[REG0]];
; CHECK: mov.u32 %r[[REG1:[0-9]+]], 10;
; CHECK: bar.sync %r[[REG1]];
; CHECK: mov.u32 %r[[REG2:[0-9]+]], 15;
; CHECK: bar.sync %r[[REG2]];
; CHECK: ret;
call void @llvm.nvvm.barrier.n(i32 0)
call void @llvm.nvvm.barrier.n(i32 10)
call void @llvm.nvvm.barrier.n(i32 15)
ret void
}
; Use bar.sync to arrive at a pre-computed barrier number and
; wait for fixed number of cooperating threads to arrive:
define ptx_device void @test_barrier_named() {
; CHECK: mov.u32 %r[[REG0A:[0-9]+]], 32;
; CHECK: mov.u32 %r[[REG0B:[0-9]+]], 0;
; CHECK: bar.sync %r[[REG0B]], %r[[REG0A]];
; CHECK: mov.u32 %r[[REG1A:[0-9]+]], 352;
; CHECK: mov.u32 %r[[REG1B:[0-9]+]], 10;
; CHECK: bar.sync %r[[REG1B]], %r[[REG1A]];
; CHECK: mov.u32 %r[[REG2A:[0-9]+]], 992;
; CHECK: mov.u32 %r[[REG2B:[0-9]+]], 15;
; CHECK: bar.sync %r[[REG2B]], %r[[REG2A]];
; CHECK: ret;
call void @llvm.nvvm.barrier(i32 0, i32 32)
call void @llvm.nvvm.barrier(i32 10, i32 352)
call void @llvm.nvvm.barrier(i32 15, i32 992)
ret void
}
declare void @llvm.nvvm.barrier(i32, i32)
declare void @llvm.nvvm.barrier.n(i32)
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