llvm/test/CodeGen/DirectX/reversebits.ll

; RUN: opt -S -scalarizer -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-library %s | FileCheck %s

; Make sure dxil operation function calls for reversebits are generated for all integer types.

; Function Attrs: nounwind
define noundef i16 @test_bitreverse_short(i16 noundef %a) {
entry:
; CHECK:call i16 @dx.op.unary.i16(i32 30, i16 %{{.*}}) #[[#ATTR:]]
  %elt.bitreverse = call i16 @llvm.bitreverse.i16(i16 %a)
  ret i16 %elt.bitreverse
}

; Function Attrs: nounwind
define noundef i32 @test_bitreverse_int(i32 noundef %a) {
entry:
; CHECK:call i32 @dx.op.unary.i32(i32 30, i32 %{{.*}}) #[[#ATTR]]
  %elt.bitreverse = call i32 @llvm.bitreverse.i32(i32 %a)
  ret i32 %elt.bitreverse
}

; Function Attrs: nounwind
define noundef i64 @test_bitreverse_long(i64 noundef %a) {
entry:
; CHECK:call i64 @dx.op.unary.i64(i32 30, i64 %{{.*}}) #[[#ATTR]]
  %elt.bitreverse = call i64 @llvm.bitreverse.i64(i64 %a)
  ret i64 %elt.bitreverse
}

define noundef <4 x i32> @bitreverse_int324(<4 x i32> noundef %a) #0 {
entry:
  ; CHECK: [[ee0:%.*]] = extractelement <4 x i32> %a, i64 0
  ; CHECK: [[ie0:%.*]] = call i32 @dx.op.unary.i32(i32 30, i32 [[ee0]]) #[[#ATTR]]
  ; CHECK: [[ee1:%.*]] = extractelement <4 x i32> %a, i64 1
  ; CHECK: [[ie1:%.*]] = call i32 @dx.op.unary.i32(i32 30, i32 [[ee1]]) #[[#ATTR]]
  ; CHECK: [[ee2:%.*]] = extractelement <4 x i32> %a, i64 2
  ; CHECK: [[ie2:%.*]] = call i32 @dx.op.unary.i32(i32 30, i32 [[ee2]]) #[[#ATTR]]
  ; CHECK: [[ee3:%.*]] = extractelement <4 x i32> %a, i64 3
  ; CHECK: [[ie3:%.*]] = call i32 @dx.op.unary.i32(i32 30, i32 [[ee3]]) #[[#ATTR]]
  ; CHECK: insertelement <4 x i32> poison, i32 [[ie0]], i64 0
  ; CHECK: insertelement <4 x i32> %{{.*}}, i32 [[ie1]], i64 1
  ; CHECK: insertelement <4 x i32> %{{.*}}, i32 [[ie2]], i64 2
  ; CHECK: insertelement <4 x i32> %{{.*}}, i32 [[ie3]], i64 3
  %2 = call <4 x i32> @llvm.bitreverse.v4i32(<4 x i32> %a) 
  ret <4 x i32> %2
}

; CHECK: attributes #[[#ATTR]] = {{{.*}} memory(none) {{.*}}}

declare i16 @llvm.bitreverse.i16(i16)
declare i32 @llvm.bitreverse.i32(i32)
declare i64 @llvm.bitreverse.i64(i64)
declare <4 x i32> @llvm.bitreverse.v4i32(<4 x i32>)