llvm/test/CodeGen/NVPTX/read-global-variable-constant.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_35 -verify-machineinstrs | FileCheck %s
; RUN: %if ptxas %{ llc < %s -mtriple=nvptx64 -mcpu=sm_35 | %ptxas-verify %}

; Check load from constant global variables.  These loads should be
; ld.global.nc (aka ldg).

@gv_float = external constant float
@gv_float2 = external constant <2 x float>
@gv_float4 = external constant <4 x float>

define float @test_gv_float() {
; CHECK-LABEL: test_gv_float(
; CHECK:       {
; CHECK-NEXT:    .reg .b32 %r<2>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.global.nc.b32 %r1, [gv_float];
; CHECK-NEXT:    st.param.b32 [func_retval0], %r1;
; CHECK-NEXT:    ret;
  %v = load float, ptr @gv_float
  ret float %v
}

define <2 x float> @test_gv_float2() {
; CHECK-LABEL: test_gv_float2(
; CHECK:       {
; CHECK-NEXT:    .reg .b64 %rd<2>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.global.nc.b64 %rd1, [gv_float2];
; CHECK-NEXT:    st.param.b64 [func_retval0], %rd1;
; CHECK-NEXT:    ret;
  %v = load <2 x float>, ptr @gv_float2
  ret <2 x float> %v
}

define <4 x float> @test_gv_float4() {
; CHECK-LABEL: test_gv_float4(
; CHECK:       {
; CHECK-NEXT:    .reg .b64 %rd<3>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.global.nc.v2.b64 {%rd1, %rd2}, [gv_float4];
; CHECK-NEXT:    st.param.v2.b64 [func_retval0], {%rd1, %rd2};
; CHECK-NEXT:    ret;
  %v = load <4 x float>, ptr @gv_float4
  ret <4 x float> %v
}