third_party/llvm-7.0/llvm/test/CodeGen/Hexagon/memcpy-memmove-inline.ll

; RUN: llc -march=hexagon -O2 -mno-pairing -mno-compound < %s | FileCheck %s

; Test to see if we inline calls to memcpy/memmove when
; the array size is small.

target triple = "hexagon-unknown--elf"

; CHECK-LABEL: f0:
; CHECK-DAG: [[REG1:r[0-9]*]] = memw(r{{[0-9]*}}+#0)
; CHECK-DAG: [[REG2:r[0-9]*]] = memuh(r{{[0-9]*}}+#4)
; CHECK-DAG: [[REG3:r[0-9]*]] = memub(r{{[0-9]*}}+#6)
; CHECK-DAG: memw(r{{[0-9]*}}+#0) = [[REG1]]
; CHECK-DAG: memh(r{{[0-9]*}}+#4) = [[REG2]]
; CHECK-DAG: memb(r{{[0-9]*}}+#6) = [[REG3]]

define i32 @f0(i32* %a0) #0 {
b0:
  %v0 = alloca [10 x i32], align 8
  %v1 = bitcast [10 x i32]* %v0 to i8*
  %v2 = bitcast i32* %a0 to i8*
  call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %v1, i8* align 4 %v2, i32 7, i1 false)
  %v3 = getelementptr inbounds [10 x i32], [10 x i32]* %v0, i32 0, i32 0
  call void @f1(i32* %v3, i32* %a0) #0
  ret i32 0
}

declare void @f1(i32*, i32*)

; CHECK-LABEL: f2:
; CHECK-DAG: [[REG4:r[0-9]*]] = memub(r{{[0-9]*}}+#6)
; CHECK-DAG: [[REG5:r[0-9]*]] = memuh(r{{[0-9]*}}+#4)
; CHECK-DAG: [[REG6:r[0-9]*]] = memw(r{{[0-9]*}}+#0)
; CHECK-DAG: memw(r{{[0-9]*}}+#0) = [[REG6]]
; CHECK-DAG: memh(r{{[0-9]*}}+#4) = [[REG5]]
; CHECK-DAG: memb(r{{[0-9]*}}+#6) = [[REG4]]

define i32 @f2(i32* %a0, i32* %a1) #0 {
b0:
  %v0 = bitcast i32* %a1 to i8*
  %v1 = bitcast i32* %a0 to i8*
  call void @llvm.memmove.p0i8.p0i8.i32(i8* align 4 %v0, i8* align 4 %v1, i32 7, i1 false)
  tail call void @f1(i32* %a1, i32* %a0) #0
  ret i32 0
}

declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture writeonly, i8* nocapture readonly, i32, i1) #1
declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i1) #1

attributes #0 = { nounwind }
attributes #1 = { argmemonly nounwind }