diff --git a/llvm/lib/IR/AutoUpgrade.cpp b/llvm/lib/IR/AutoUpgrade.cpp
--- a/llvm/lib/IR/AutoUpgrade.cpp
+++ b/llvm/lib/IR/AutoUpgrade.cpp
@@ -4077,6 +4077,12 @@
     Value *Args[4] = {CI->getArgOperand(0), CI->getArgOperand(1),
                       CI->getArgOperand(2), CI->getArgOperand(4)};
     NewCall = Builder.CreateCall(NewFn, Args);
+    AttributeList OldAttrs = CI->getAttributes();
+    AttributeList NewAttrs = AttributeList::get(
+        C, OldAttrs.getFnAttrs(), OldAttrs.getRetAttrs(),
+        {OldAttrs.getParamAttrs(0), OldAttrs.getParamAttrs(1),
+         OldAttrs.getParamAttrs(2), OldAttrs.getParamAttrs(4)});
+    NewCall->setAttributes(NewAttrs);
     auto *MemCI = cast<MemIntrinsic>(NewCall);
     // All mem intrinsics support dest alignment.
     const ConstantInt *Align = cast<ConstantInt>(CI->getArgOperand(3));
diff --git a/llvm/test/Bitcode/upgrade-memory-intrinsics.ll b/llvm/test/Bitcode/upgrade-memory-intrinsics.ll
--- a/llvm/test/Bitcode/upgrade-memory-intrinsics.ll
+++ b/llvm/test/Bitcode/upgrade-memory-intrinsics.ll
@@ -27,6 +27,18 @@
   ret void
 }
 
+; Make sure that attributes are not dropped
+define void @test3(i8* %p1, i8* %p2, i8* %p3) {
+; CHECK-LABEL: @test
+; CHECK: call void @llvm.memset.p0i8.i64(i8* nonnull align 4 %p1, i8 signext 55, i64 zeroext 100, i1 immarg false)
+; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 4 %p1, i8* readonly align 4 %p2, i64 zeroext 50, i1 immarg false)
+; CHECK: call void @llvm.memmove.p0i8.p0i8.i64(i8* nonnull align 4 %p2, i8* readonly align 4 %p3, i64 zeroext 1000, i1 immarg false)
+  call void @llvm.memset.p0i8.i64(i8* nonnull %p1, i8 signext 55, i64 zeroext 100, i32 signext 4, i1 immarg false)
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull %p1, i8* readonly %p2, i64 zeroext 50, i32 signext 4, i1 immarg false)
+  call void @llvm.memmove.p0i8.p0i8.i64(i8* nonnull %p2, i8* readonly %p3, i64 zeroext 1000, i32 signext 4, i1 immarg false)
+  ret void
+}
+
 ; CHECK: declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg)
 ; CHECK: declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
 ; CHECK: declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1 immarg)
diff --git a/llvm/test/Transforms/IROutliner/illegal-memset.ll b/llvm/test/Transforms/IROutliner/illegal-memset.ll
--- a/llvm/test/Transforms/IROutliner/illegal-memset.ll
+++ b/llvm/test/Transforms/IROutliner/illegal-memset.ll
@@ -11,7 +11,7 @@
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[POOL:%.*]] = alloca [59 x i64], align 4
 ; CHECK-NEXT:    [[TMP:%.*]] = bitcast [59 x i64]* [[POOL]] to i8*
-; CHECK-NEXT:    call void @llvm.memset.p0i8.i64(i8* align 4 [[TMP]], i8 0, i64 236, i1 false)
+; CHECK-NEXT:    call void @llvm.memset.p0i8.i64(i8* nonnull align 4 [[TMP]], i8 0, i64 236, i1 false)
 ; CHECK-NEXT:    call void @outlined_ir_func_0(i64 [[N:%.*]], i64 [[X:%.*]], i64 [[Z:%.*]])
 ; CHECK-NEXT:    ret i64 0
 ;
@@ -30,7 +30,7 @@
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[POOL:%.*]] = alloca [59 x i64], align 4
 ; CHECK-NEXT:    [[TMP:%.*]] = bitcast [59 x i64]* [[POOL]] to i8*
-; CHECK-NEXT:    call void @llvm.memset.p0i8.i64(i8* align 4 [[TMP]], i8 0, i64 236, i1 false)
+; CHECK-NEXT:    call void @llvm.memset.p0i8.i64(i8* nonnull align 4 [[TMP]], i8 0, i64 236, i1 false)
 ; CHECK-NEXT:    call void @outlined_ir_func_0(i64 [[N:%.*]], i64 [[X:%.*]], i64 [[Z:%.*]])
 ; CHECK-NEXT:    ret i64 0
 ;
diff --git a/llvm/test/Transforms/IROutliner/outline-memset.ll b/llvm/test/Transforms/IROutliner/outline-memset.ll
--- a/llvm/test/Transforms/IROutliner/outline-memset.ll
+++ b/llvm/test/Transforms/IROutliner/outline-memset.ll
@@ -45,7 +45,7 @@
 ; CHECK-NEXT:    br label [[ENTRY_TO_OUTLINE:%.*]]
 ; CHECK:       entry_to_outline:
 ; CHECK-NEXT:    [[TMP:%.*]] = bitcast [59 x i64]* [[TMP0:%.*]] to i8*
-; CHECK-NEXT:    call void @llvm.memset.p0i8.i64(i8* align 4 [[TMP]], i8 0, i64 236, i1 false)
+; CHECK-NEXT:    call void @llvm.memset.p0i8.i64(i8* nonnull align 4 [[TMP]], i8 0, i64 236, i1 false)
 ; CHECK-NEXT:    [[CMP3:%.*]] = icmp eq i64 [[TMP1:%.*]], 0
 ; CHECK-NEXT:    [[A:%.*]] = add i64 [[TMP2:%.*]], [[TMP3:%.*]]
 ; CHECK-NEXT:    [[C:%.*]] = add i64 [[TMP2]], [[TMP3]]