llvm/test/CodeGen/NVPTX/elect.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_90 -mattr=+ptx80 | FileCheck %s
; RUN: %if ptxas-sm_90 && ptxas-isa-8.0 %{ llc < %s -mtriple=nvptx64 -mcpu=sm_90 -mattr=+ptx80 | %ptxas-verify -arch=sm_90 %}

target triple = "nvptx64-nvidia-cuda"

declare {i32, i1} @llvm.nvvm.elect.sync(i32)

define {i32, i1} @elect_sync(i32 %mask) {
; CHECK-LABEL: elect_sync(
; CHECK:       {
; CHECK-NEXT:    .reg .pred %p<2>;
; CHECK-NEXT:    .reg .b16 %rs<2>;
; CHECK-NEXT:    .reg .b32 %r<3>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b32 %r1, [elect_sync_param_0];
; CHECK-NEXT:    elect.sync %r2|%p1, %r1;
; CHECK-NEXT:    st.param.b32 [func_retval0], %r2;
; CHECK-NEXT:    selp.b16 %rs1, -1, 0, %p1;
; CHECK-NEXT:    st.param.b8 [func_retval0+4], %rs1;
; CHECK-NEXT:    ret;
  %val = call {i32, i1} @llvm.nvvm.elect.sync(i32 %mask)
  ret {i32, i1} %val
}

define {i32, i1} @elect_sync_imm() {
; CHECK-LABEL: elect_sync_imm(
; CHECK:       {
; CHECK-NEXT:    .reg .pred %p<2>;
; CHECK-NEXT:    .reg .b16 %rs<2>;
; CHECK-NEXT:    .reg .b32 %r<2>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    elect.sync %r1|%p1, -1;
; CHECK-NEXT:    st.param.b32 [func_retval0], %r1;
; CHECK-NEXT:    selp.b16 %rs1, -1, 0, %p1;
; CHECK-NEXT:    st.param.b8 [func_retval0+4], %rs1;
; CHECK-NEXT:    ret;
  %val = call {i32, i1} @llvm.nvvm.elect.sync(i32 u0xffffffff)
  ret {i32, i1} %val
}

; When there are two elect.sync's make sure that
; the second one is not optimized away.
define {i32, i1} @elect_sync_twice(i32 %mask) {
; CHECK-LABEL: elect_sync_twice(
; CHECK:       {
; CHECK-NEXT:    .reg .pred %p<3>;
; CHECK-NEXT:    .reg .b16 %rs<2>;
; CHECK-NEXT:    .reg .b32 %r<4>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b32 %r1, [elect_sync_twice_param_0];
; CHECK-NEXT:    elect.sync %r2|%p1, %r1;
; CHECK-NEXT:    elect.sync %r3|%p2, %r1;
; CHECK-NEXT:    selp.b16 %rs1, -1, 0, %p1;
; CHECK-NEXT:    st.param.b8 [func_retval0+4], %rs1;
; CHECK-NEXT:    st.param.b32 [func_retval0], %r2;
; CHECK-NEXT:    ret;
  %val = call {i32, i1} @llvm.nvvm.elect.sync(i32 %mask)
  %val2 = call {i32, i1} @llvm.nvvm.elect.sync(i32 %mask)
  ret {i32, i1} %val
}