Imported Upstream version 5.18.0.207

Former-commit-id: 3b152f462918d427ce18620a2cbe4f8b79650449

external/llvm/test/Transforms/MemCpyOpt/callslot_deref.ll

@@ -1,30 +0,0 @@
-; RUN: opt < %s -S -basicaa -memcpyopt | FileCheck %s
-target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
-
-declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) unnamed_addr nounwind
-declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
-
-; all bytes of %dst that are touch by the memset are dereferenceable
-define void @must_remove_memcpy(i8* noalias nocapture dereferenceable(4096) %dst) {
-; CHECK-LABEL: @must_remove_memcpy(
-; CHECK: call void @llvm.memset.p0i8.i64
-; CHECK-NOT: call void @llvm.memcpy.p0i8.p0i8.i64
-  %src = alloca [4096 x i8], align 1
-  %p = getelementptr inbounds [4096 x i8], [4096 x i8]* %src, i64 0, i64 0
-  call void @llvm.memset.p0i8.i64(i8* %p, i8 0, i64 4096, i32 1, i1 false)
-  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %p, i64 4096, i32 1, i1 false) #2
-  ret void
-}
-
-; memset touch more bytes than those guaranteed to be dereferenceable
-; We can't remove the memcpy, but we can turn it into an independent memset.
-define void @must_not_remove_memcpy(i8* noalias nocapture dereferenceable(1024) %dst) {
-; CHECK-LABEL: @must_not_remove_memcpy(
-; CHECK: call void @llvm.memset.p0i8.i64
-; CHECK: call void @llvm.memset.p0i8.i64
-  %src = alloca [4096 x i8], align 1
-  %p = getelementptr inbounds [4096 x i8], [4096 x i8]* %src, i64 0, i64 0
-  call void @llvm.memset.p0i8.i64(i8* %p, i8 0, i64 4096, i32 1, i1 false)
-  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %p, i64 4096, i32 1, i1 false) #2
-  ret void
-}