test/CodeGen/NVPTX/idioms.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; Check that various LLVM idioms get lowered to NVPTX as expected.

; RUN: llc < %s -mtriple=nvptx -mcpu=sm_20 | FileCheck %s
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_20 | FileCheck %s
; RUN: %if ptxas-ptr32 %{ llc < %s -mtriple=nvptx -mcpu=sm_20 | %ptxas-verify %}
; RUN: %if ptxas %{ llc < %s -mtriple=nvptx64 -mcpu=sm_20 | %ptxas-verify %}

%struct.S16 = type { i16, i16 }
%struct.S32 = type { i32, i32 }

define i16 @abs_i16(i16 %a) {
; CHECK-LABEL: abs_i16(
; CHECK:       {
; CHECK-NEXT:    .reg .b16 %rs<3>;
; CHECK-NEXT:    .reg .b32 %r<2>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b16 %rs1, [abs_i16_param_0];
; CHECK-NEXT:    abs.s16 %rs2, %rs1;
; CHECK-NEXT:    cvt.u32.u16 %r1, %rs2;
; CHECK-NEXT:    st.param.b32 [func_retval0], %r1;
; CHECK-NEXT:    ret;
  %neg = sub i16 0, %a
  %abs.cond = icmp sge i16 %a, 0
  %abs = select i1 %abs.cond, i16 %a, i16 %neg
  ret i16 %abs
}

define i32 @abs_i32(i32 %a) {
; CHECK-LABEL: abs_i32(
; CHECK:       {
; CHECK-NEXT:    .reg .b32 %r<3>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b32 %r1, [abs_i32_param_0];
; CHECK-NEXT:    abs.s32 %r2, %r1;
; CHECK-NEXT:    st.param.b32 [func_retval0], %r2;
; CHECK-NEXT:    ret;
  %neg = sub i32 0, %a
  %abs.cond = icmp sge i32 %a, 0
  %abs = select i1 %abs.cond, i32 %a, i32 %neg
  ret i32 %abs
}

define i64 @abs_i64(i64 %a) {
; CHECK-LABEL: abs_i64(
; CHECK:       {
; CHECK-NEXT:    .reg .b64 %rd<3>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b64 %rd1, [abs_i64_param_0];
; CHECK-NEXT:    abs.s64 %rd2, %rd1;
; CHECK-NEXT:    st.param.b64 [func_retval0], %rd2;
; CHECK-NEXT:    ret;
  %neg = sub i64 0, %a
  %abs.cond = icmp sge i64 %a, 0
  %abs = select i1 %abs.cond, i64 %a, i64 %neg
  ret i64 %abs
}

define %struct.S16 @i32_to_2xi16(i32 noundef %in) {
; CHECK-LABEL: i32_to_2xi16(
; CHECK:       {
; CHECK-NEXT:    .reg .b32 %r<3>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b32 %r1, [i32_to_2xi16_param_0];
; CHECK-NEXT:    shr.u32 %r2, %r1, 16;
; CHECK-NEXT:    st.param.b16 [func_retval0], %r1;
; CHECK-NEXT:    st.param.b16 [func_retval0+2], %r2;
; CHECK-NEXT:    ret;
  %low = trunc i32 %in to i16
  %high32 = lshr i32 %in, 16
  %high = trunc i32 %high32 to i16
  %s1 = insertvalue %struct.S16 poison, i16 %low, 0
  %s = insertvalue %struct.S16 %s1, i16 %high, 1
  ret %struct.S16 %s
}

; Same as above, but with rearranged order of low/high parts.
define %struct.S16 @i32_to_2xi16_lh(i32 noundef %in) {
; CHECK-LABEL: i32_to_2xi16_lh(
; CHECK:       {
; CHECK-NEXT:    .reg .b32 %r<3>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b32 %r1, [i32_to_2xi16_lh_param_0];
; CHECK-NEXT:    shr.u32 %r2, %r1, 16;
; CHECK-NEXT:    st.param.b16 [func_retval0], %r1;
; CHECK-NEXT:    st.param.b16 [func_retval0+2], %r2;
; CHECK-NEXT:    ret;
  %high32 = lshr i32 %in, 16
  %high = trunc i32 %high32 to i16
  %low = trunc i32 %in to i16
  %s1 = insertvalue %struct.S16 poison, i16 %low, 0
  %s = insertvalue %struct.S16 %s1, i16 %high, 1
  ret %struct.S16 %s
}


define %struct.S16 @i32_to_2xi16_not(i32 noundef %in) {
; CHECK-LABEL: i32_to_2xi16_not(
; CHECK:       {
; CHECK-NEXT:    .reg .b32 %r<3>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b32 %r1, [i32_to_2xi16_not_param_0];
; CHECK-NEXT:    shr.u32 %r2, %r1, 15;
; CHECK-NEXT:    st.param.b16 [func_retval0], %r1;
; CHECK-NEXT:    st.param.b16 [func_retval0+2], %r2;
; CHECK-NEXT:    ret;
  %low = trunc i32 %in to i16
  ;  Shift by any value other than 16 blocks the conversiopn to mov.
  %high32 = lshr i32 %in, 15
  %high = trunc i32 %high32 to i16
  %s1 = insertvalue %struct.S16 poison, i16 %low, 0
  %s = insertvalue %struct.S16 %s1, i16 %high, 1
  ret %struct.S16 %s
}

define %struct.S32 @i64_to_2xi32(i64 noundef %in) {
; CHECK-LABEL: i64_to_2xi32(
; CHECK:       {
; CHECK-NEXT:    .reg .b64 %rd<3>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b64 %rd1, [i64_to_2xi32_param_0];
; CHECK-NEXT:    shr.u64 %rd2, %rd1, 32;
; CHECK-NEXT:    st.param.b32 [func_retval0], %rd1;
; CHECK-NEXT:    st.param.b32 [func_retval0+4], %rd2;
; CHECK-NEXT:    ret;
  %low = trunc i64 %in to i32
  %high64 = lshr i64 %in, 32
  %high = trunc i64 %high64 to i32
  %s1 = insertvalue %struct.S32 poison, i32 %low, 0
  %s = insertvalue %struct.S32 %s1, i32 %high, 1
  ret %struct.S32 %s
}

define %struct.S32 @i64_to_2xi32_not(i64 noundef %in) {
; CHECK-LABEL: i64_to_2xi32_not(
; CHECK:       {
; CHECK-NEXT:    .reg .b64 %rd<3>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b64 %rd1, [i64_to_2xi32_not_param_0];
; CHECK-NEXT:    shr.u64 %rd2, %rd1, 31;
; CHECK-NEXT:    st.param.b32 [func_retval0], %rd1;
; CHECK-NEXT:    st.param.b32 [func_retval0+4], %rd2;
; CHECK-NEXT:    ret;
  %low = trunc i64 %in to i32
  ;  Shift by any value other than 32 blocks the conversiopn to mov.
  %high64 = lshr i64 %in, 31
  %high = trunc i64 %high64 to i32
  %s1 = insertvalue %struct.S32 poison, i32 %low, 0
  %s = insertvalue %struct.S32 %s1, i32 %high, 1
  ret %struct.S32 %s
}

; Make sure we do not get confused when our input itself is [al]shr.
define %struct.S16 @i32_to_2xi16_shr(i32 noundef %i){
; CHECK-LABEL: i32_to_2xi16_shr(
; CHECK:       {
; CHECK-NEXT:    .reg .b32 %r<4>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b32 %r1, [i32_to_2xi16_shr_param_0];
; CHECK-NEXT:    { // callseq 0, 0
; CHECK-NEXT:    .param .b32 param0;
; CHECK-NEXT:    st.param.b32 [param0], %r1;
; CHECK-NEXT:    call.uni escape_int, (param0);
; CHECK-NEXT:    } // callseq 0
; CHECK-NEXT:    shr.s32 %r2, %r1, 16;
; CHECK-NEXT:    shr.u32 %r3, %r2, 16;
; CHECK-NEXT:    st.param.b16 [func_retval0+2], %r3;
; CHECK-NEXT:    st.param.b16 [func_retval0], %r2;
; CHECK-NEXT:    ret;
  call void @escape_int(i32 %i); // Force %i to be loaded completely.
  %i1 = ashr i32 %i, 16
  %l = trunc i32 %i1 to i16
  %h32 = ashr i32 %i1, 16
  %h = trunc i32 %h32 to i16
  %s0 = insertvalue %struct.S16 poison, i16 %l, 0
  %s1 = insertvalue %struct.S16 %s0, i16 %h, 1
  ret %struct.S16 %s1
}
declare dso_local void @escape_int(i32 noundef)