Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/Transforms/CodeGenPrepare/X86/memset_chk-simplify-nobuiltin.ll

@@ -0,0 +1,18 @@
+; RUN: opt -S -disable-simplify-libcalls -codegenprepare < %s | FileCheck %s
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+
+; This is a workaround for PR23093: when building with -mkernel/-fno-builtin,
+; we still generate fortified library calls.
+
+; Check that we ignore two things:
+; - attribute nobuiltin
+; - TLI::has (always returns false thanks to -disable-simplify-libcalls)
+
+; CHECK-NOT: _chk
+; CHECK: call void @llvm.memset.p0i8.i64(i8* %dst, i8 0, i64 %len, i32 1, i1 false)
+define void @test_nobuiltin(i8* %dst, i64 %len) {
+  call i8* @__memset_chk(i8* %dst, i32 0, i64 %len, i64 -1) nobuiltin
+  ret void
+}
+
+declare i8* @__memset_chk(i8*, i32, i64, i64)