test/Bitcode/upgrade-memory-intrinsics.ll

; RUN: opt -S < %s | FileCheck %s

; Test to ensure that calls to the memcpy/memmove/memset intrinsics are auto-upgraded
; to remove the alignment parameter in favour of align attributes on the pointer args.

; Make sure a non-zero alignment is propagated
define void @test(ptr %p1, ptr %p2, ptr %p3) {
; CHECK-LABEL: @test
; CHECK: call void @llvm.memset.p0.i64(ptr align 4 %p1, i8 55, i64 100, i1 false)
; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 4 %p1, ptr align 4 %p2, i64 50, i1 false)
; CHECK: call void @llvm.memmove.p0.p0.i64(ptr align 4 %p2, ptr align 4 %p3, i64 1000, i1 false)
  call void @llvm.memset.p0.i64(ptr %p1, i8 55, i64 100, i32 4, i1 false)
  call void @llvm.memcpy.p0.p0.i64(ptr %p1, ptr %p2, i64 50, i32 4, i1 false)
  call void @llvm.memmove.p0.p0.i64(ptr %p2, ptr %p3, i64 1000, i32 4, i1 false)
  ret void
}

; Make sure that a zero alignment is handled properly
define void @test2(ptr %p1, ptr %p2, ptr %p3) {
; CHECK-LABEL: @test
; CHECK: call void @llvm.memset.p0.i64(ptr %p1, i8 55, i64 100, i1 false)
; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr %p1, ptr %p2, i64 50, i1 false)
; CHECK: call void @llvm.memmove.p0.p0.i64(ptr %p2, ptr %p3, i64 1000, i1 false)
  call void @llvm.memset.p0.i64(ptr %p1, i8 55, i64 100, i32 0, i1 false)
  call void @llvm.memcpy.p0.p0.i64(ptr %p1, ptr %p2, i64 50, i32 0, i1 false)
  call void @llvm.memmove.p0.p0.i64(ptr %p2, ptr %p3, i64 1000, i32 0, i1 false)
  ret void
}

; Make sure that attributes are not dropped
define void @test3(ptr %p1, ptr %p2, ptr %p3) {
; CHECK-LABEL: @test
; CHECK: call void @llvm.memset.p0.i64(ptr nonnull align 4 %p1, i8 signext 55, i64 zeroext 100, i1 false)
; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 4 %p1, ptr readonly align 4 %p2, i64 zeroext 50, i1 false)
; CHECK: call void @llvm.memmove.p0.p0.i64(ptr nonnull align 4 %p2, ptr readonly align 4 %p3, i64 zeroext 1000, i1 false)
  call void @llvm.memset.p0.i64(ptr nonnull %p1, i8 signext 55, i64 zeroext 100, i32 signext 4, i1 false)
  call void @llvm.memcpy.p0.p0.i64(ptr nonnull %p1, ptr readonly %p2, i64 zeroext 50, i32 signext 4, i1 false)
  call void @llvm.memmove.p0.p0.i64(ptr nonnull %p2, ptr readonly %p3, i64 zeroext 1000, i32 signext 4, i1 false)
  ret void
}

; CHECK: declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
; CHECK: declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg)
; CHECK: declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i32, i1)
declare void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly , ptr nocapture readonly, i64, i32, i1)
declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i32, i1)