[clang] [cfi][NFCI] Precommit tests to show nomerge functionality (PR #135104)
Thurston Dang via cfe-commits
cfe-commits at lists.llvm.org
Wed Apr 9 17:05:56 PDT 2025
https://github.com/thurstond created https://github.com/llvm/llvm-project/pull/135104
https://github.com/llvm/llvm-project/pull/120464 (and earlier CLs) added -fsanitize-merge functionality, which is intended to work for all "sanitizers". It is nearly correct for CFI.
This patch precommits some tests for CFI, to track the progress of future -fsanitize-merge fixes for CFI.
>From a48051b4c1e2230f46617265268d49c64846f21b Mon Sep 17 00:00:00 2001
From: Thurston Dang <thurston at google.com>
Date: Thu, 10 Apr 2025 00:03:08 +0000
Subject: [PATCH] [cfi][NFCI] Precommit tests to show nomerge functionality
https://github.com/llvm/llvm-project/pull/120464 (and earlier CLs) added -fsanitize-merge functionality, which is intended to work for all "sanitizers". It is nearly correct for CFI.
This patch precommits some tests for CFI, to track the progress of
future -fsanitize-merge fixes.
---
clang/test/CodeGen/cfi-check-fail-nomerge.c | 232 +++++++++++++++++++
clang/test/CodeGen/cfi-check-fail2-nomerge.c | 206 ++++++++++++++++
clang/test/CodeGenCXX/cfi-mfcall-nomerge.cpp | 131 +++++++++++
3 files changed, 569 insertions(+)
create mode 100644 clang/test/CodeGen/cfi-check-fail-nomerge.c
create mode 100644 clang/test/CodeGen/cfi-check-fail2-nomerge.c
create mode 100644 clang/test/CodeGenCXX/cfi-mfcall-nomerge.cpp
diff --git a/clang/test/CodeGen/cfi-check-fail-nomerge.c b/clang/test/CodeGen/cfi-check-fail-nomerge.c
new file mode 100644
index 0000000000000..05ea8d8327904
--- /dev/null
+++ b/clang/test/CodeGen/cfi-check-fail-nomerge.c
@@ -0,0 +1,232 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --include-generated-funcs --version 5
+//
+// N.B. although the clang driver defaults to merge, clang_cc1 defaults to non-merge.
+// (This is similar to -fsanitize-recover, for which the default is also applied
+// at the driver level only.)
+// If optimization is disabled, merging is disabled (overrides -fsanitize-merge).
+
+// RUN: %clang_cc1 -O3 -triple x86_64-unknown-linux -fsanitize-cfi-cross-dso \
+// RUN: -fsanitize=cfi-icall,cfi-nvcall,cfi-vcall,cfi-unrelated-cast,cfi-derived-cast \
+// RUN: -fsanitize-trap=cfi-icall,cfi-nvcall \
+// RUN: -fsanitize-merge=cfi-icall,cfi-nvcall \
+// RUN: -emit-llvm -o - %s | FileCheck %s --check-prefix=MERGE
+
+// RUN: %clang_cc1 -O3 -triple x86_64-unknown-linux -fsanitize-cfi-cross-dso \
+// RUN: -fsanitize=cfi-icall,cfi-nvcall,cfi-vcall,cfi-unrelated-cast,cfi-derived-cast \
+// RUN: -fsanitize-trap=cfi-icall,cfi-nvcall \
+// RUN: -emit-llvm -o - %s | FileCheck %s --check-prefix=NO-MERGE
+
+// NOMERGE-LABEL: define dso_local void @caller(
+// NOMERGE-SAME: ptr noundef [[F:%.*]]) #[[ATTR0:[0-9]+]] !type [[META4:![0-9]+]] !type [[META5:![0-9]+]] !type [[META6:![0-9]+]] {
+// NOMERGE-NEXT: [[ENTRY:.*:]]
+// NOMERGE-NEXT: [[F_ADDR:%.*]] = alloca ptr, align 8
+// NOMERGE-NEXT: store ptr [[F]], ptr [[F_ADDR]], align 8
+// NOMERGE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[F_ADDR]], align 8
+// NOMERGE-NEXT: [[TMP1:%.*]] = call i1 @llvm.type.test(ptr [[TMP0]], metadata !"_ZTSFvvE"), !nosanitize [[META7:![0-9]+]]
+// NOMERGE-NEXT: br i1 [[TMP1]], label %[[CFI_CONT:.*]], label %[[CFI_SLOWPATH:.*]], !prof [[PROF8:![0-9]+]], !nosanitize [[META7]]
+// NOMERGE: [[CFI_SLOWPATH]]:
+// NOMERGE-NEXT: call void @__cfi_slowpath(i64 9080559750644022485, ptr [[TMP0]]) #[[ATTR7:[0-9]+]], !nosanitize [[META7]]
+// NOMERGE-NEXT: br label %[[CFI_CONT]], !nosanitize [[META7]]
+// NOMERGE: [[CFI_CONT]]:
+// NOMERGE-NEXT: call void [[TMP0]]()
+// NOMERGE-NEXT: ret void
+void caller(void (*f)(void)) {
+ f();
+}
+
+
+
+// MERGE-LABEL: define dso_local void @caller(
+// MERGE-SAME: ptr noundef [[F:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] !type [[META4:![0-9]+]] !type [[META5:![0-9]+]] !type [[META6:![0-9]+]] {
+// MERGE-NEXT: [[ENTRY:.*:]]
+// MERGE-NEXT: [[TMP0:%.*]] = tail call i1 @llvm.type.test(ptr [[F]], metadata !"_ZTSFvvE"), !nosanitize [[META7:![0-9]+]]
+// MERGE-NEXT: br i1 [[TMP0]], label %[[CFI_CONT:.*]], label %[[CFI_SLOWPATH:.*]], !prof [[PROF8:![0-9]+]], !nosanitize [[META7]]
+// MERGE: [[CFI_SLOWPATH]]:
+// MERGE-NEXT: tail call void @__cfi_slowpath(i64 9080559750644022485, ptr [[F]]) #[[ATTR5:[0-9]+]], !nosanitize [[META7]]
+// MERGE-NEXT: br label %[[CFI_CONT]], !nosanitize [[META7]]
+// MERGE: [[CFI_CONT]]:
+// MERGE-NEXT: tail call void [[F]]() #[[ATTR5]]
+// MERGE-NEXT: ret void
+//
+//
+// MERGE-LABEL: define weak_odr hidden void @__cfi_check_fail(
+// MERGE-SAME: ptr noundef [[TMP0:%.*]], ptr noundef [[TMP1:%.*]]) #[[ATTR0]] {
+// MERGE-NEXT: [[ENTRY:.*:]]
+// MERGE-NEXT: [[DOTNOT:%.*]] = icmp eq ptr [[TMP0]], null, !nosanitize [[META7]]
+// MERGE-NEXT: br i1 [[DOTNOT]], label %[[TRAP:.*]], label %[[CONT:.*]], !prof [[PROF9:![0-9]+]], !nosanitize [[META7]]
+// MERGE: [[TRAP]]:
+// MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR6:[0-9]+]], !nosanitize [[META7]]
+// MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// MERGE: [[CONT]]:
+// MERGE-NEXT: [[TMP2:%.*]] = load i8, ptr [[TMP0]], align 4, !nosanitize [[META7]]
+// MERGE-NEXT: [[TMP3:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP1]], metadata !"all-vtables"), !nosanitize [[META7]]
+// MERGE-NEXT: [[TMP4:%.*]] = zext i1 [[TMP3]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: switch i8 [[TMP2]], label %[[CONT8:.*]] [
+// MERGE-NEXT: i8 0, label %[[HANDLER_CFI_CHECK_FAIL:.*]]
+// MERGE-NEXT: i8 1, label %[[TRAP]]
+// MERGE-NEXT: i8 2, label %[[HANDLER_CFI_CHECK_FAIL4:.*]]
+// MERGE-NEXT: i8 3, label %[[HANDLER_CFI_CHECK_FAIL6:.*]]
+// MERGE-NEXT: i8 4, label %[[TRAP]]
+// MERGE-NEXT: ], !prof [[PROF10:![0-9]+]]
+// MERGE: [[HANDLER_CFI_CHECK_FAIL]]:
+// MERGE-NEXT: [[TMP5:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: [[TMP6:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP5]], i64 [[TMP6]], i64 [[TMP4]]) #[[ATTR7:[0-9]+]], !nosanitize [[META7]]
+// MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// MERGE: [[HANDLER_CFI_CHECK_FAIL4]]:
+// MERGE-NEXT: [[TMP7:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: [[TMP8:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP7]], i64 [[TMP8]], i64 [[TMP4]]) #[[ATTR7]], !nosanitize [[META7]]
+// MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// MERGE: [[HANDLER_CFI_CHECK_FAIL6]]:
+// MERGE-NEXT: [[TMP9:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: [[TMP10:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP9]], i64 [[TMP10]], i64 [[TMP4]]) #[[ATTR7]], !nosanitize [[META7]]
+// MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// MERGE: [[CONT8]]:
+// MERGE-NEXT: ret void, !nosanitize [[META7]]
+//
+//
+// MERGE-LABEL: define weak void @__cfi_check(
+// MERGE-SAME: i64 noundef [[TMP0:%.*]], ptr noundef [[TMP1:%.*]], ptr noundef [[TMP2:%.*]]) local_unnamed_addr #[[ATTR4:[0-9]+]] align 4096 {
+// MERGE-NEXT: [[ENTRY:.*:]]
+// MERGE-NEXT: [[DOTNOT_I:%.*]] = icmp eq ptr [[TMP2]], null, !nosanitize [[META7]]
+// MERGE-NEXT: br i1 [[DOTNOT_I]], label %[[TRAP_I:.*]], label %[[CONT_I:.*]], !prof [[PROF9]], !nosanitize [[META7]]
+// MERGE: [[TRAP_I]]:
+// MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR6]], !nosanitize [[META7]]
+// MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// MERGE: [[CONT_I]]:
+// MERGE-NEXT: [[TMP3:%.*]] = load i8, ptr [[TMP2]], align 4, !nosanitize [[META7]]
+// MERGE-NEXT: [[TMP4:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP1]], metadata !"all-vtables"), !nosanitize [[META7]]
+// MERGE-NEXT: [[TMP5:%.*]] = zext i1 [[TMP4]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: switch i8 [[TMP3]], label %[[__CFI_CHECK_FAIL_EXIT:.*]] [
+// MERGE-NEXT: i8 0, label %[[HANDLER_CFI_CHECK_FAIL_I:.*]]
+// MERGE-NEXT: i8 1, label %[[TRAP_I]]
+// MERGE-NEXT: i8 2, label %[[HANDLER_CFI_CHECK_FAIL4_I:.*]]
+// MERGE-NEXT: i8 3, label %[[HANDLER_CFI_CHECK_FAIL6_I:.*]]
+// MERGE-NEXT: i8 4, label %[[TRAP_I]]
+// MERGE-NEXT: ], !prof [[PROF10]]
+// MERGE: [[HANDLER_CFI_CHECK_FAIL_I]]:
+// MERGE-NEXT: [[TMP6:%.*]] = ptrtoint ptr [[TMP2]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: [[TMP7:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP6]], i64 [[TMP7]], i64 [[TMP5]]) #[[ATTR7]], !nosanitize [[META7]]
+// MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// MERGE: [[HANDLER_CFI_CHECK_FAIL4_I]]:
+// MERGE-NEXT: [[TMP8:%.*]] = ptrtoint ptr [[TMP2]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: [[TMP9:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP8]], i64 [[TMP9]], i64 [[TMP5]]) #[[ATTR7]], !nosanitize [[META7]]
+// MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// MERGE: [[HANDLER_CFI_CHECK_FAIL6_I]]:
+// MERGE-NEXT: [[TMP10:%.*]] = ptrtoint ptr [[TMP2]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: [[TMP11:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP10]], i64 [[TMP11]], i64 [[TMP5]]) #[[ATTR7]], !nosanitize [[META7]]
+// MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// MERGE: [[__CFI_CHECK_FAIL_EXIT]]:
+// MERGE-NEXT: ret void
+//
+//
+// NO-MERGE-LABEL: define dso_local void @caller(
+// NO-MERGE-SAME: ptr noundef [[F:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] !type [[META4:![0-9]+]] !type [[META5:![0-9]+]] !type [[META6:![0-9]+]] {
+// NO-MERGE-NEXT: [[ENTRY:.*:]]
+// NO-MERGE-NEXT: [[TMP0:%.*]] = tail call i1 @llvm.type.test(ptr [[F]], metadata !"_ZTSFvvE"), !nosanitize [[META7:![0-9]+]]
+// NO-MERGE-NEXT: br i1 [[TMP0]], label %[[CFI_CONT:.*]], label %[[CFI_SLOWPATH:.*]], !prof [[PROF8:![0-9]+]], !nosanitize [[META7]]
+// NO-MERGE: [[CFI_SLOWPATH]]:
+// NO-MERGE-NEXT: tail call void @__cfi_slowpath(i64 9080559750644022485, ptr [[F]]) #[[ATTR5:[0-9]+]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: br label %[[CFI_CONT]], !nosanitize [[META7]]
+// NO-MERGE: [[CFI_CONT]]:
+// NO-MERGE-NEXT: tail call void [[F]]() #[[ATTR5]]
+// NO-MERGE-NEXT: ret void
+//
+//
+// NO-MERGE-LABEL: define weak_odr hidden void @__cfi_check_fail(
+// NO-MERGE-SAME: ptr noundef [[TMP0:%.*]], ptr noundef [[TMP1:%.*]]) #[[ATTR0]] {
+// NO-MERGE-NEXT: [[ENTRY:.*:]]
+// NO-MERGE-NEXT: [[DOTNOT:%.*]] = icmp eq ptr [[TMP0]], null, !nosanitize [[META7]]
+// NO-MERGE-NEXT: br i1 [[DOTNOT]], label %[[TRAP:.*]], label %[[CONT:.*]], !prof [[PROF9:![0-9]+]], !nosanitize [[META7]]
+// NO-MERGE: [[TRAP]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR6:[0-9]+]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[CONT]]:
+// NO-MERGE-NEXT: [[TMP2:%.*]] = load i8, ptr [[TMP0]], align 4, !nosanitize [[META7]]
+// NO-MERGE-NEXT: [[TMP3:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP1]], metadata !"all-vtables"), !nosanitize [[META7]]
+// NO-MERGE-NEXT: [[TMP4:%.*]] = zext i1 [[TMP3]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: switch i8 [[TMP2]], label %[[CONT10:.*]] [
+// NO-MERGE-NEXT: i8 0, label %[[HANDLER_CFI_CHECK_FAIL:.*]]
+// NO-MERGE-NEXT: i8 1, label %[[TRAP3:.*]]
+// NO-MERGE-NEXT: i8 2, label %[[HANDLER_CFI_CHECK_FAIL5:.*]]
+// NO-MERGE-NEXT: i8 3, label %[[HANDLER_CFI_CHECK_FAIL7:.*]]
+// NO-MERGE-NEXT: i8 4, label %[[TRAP9:.*]]
+// NO-MERGE-NEXT: ], !prof [[PROF10:![0-9]+]]
+// NO-MERGE: [[HANDLER_CFI_CHECK_FAIL]]:
+// NO-MERGE-NEXT: [[TMP5:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: [[TMP6:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP5]], i64 [[TMP6]], i64 [[TMP4]]) #[[ATTR7:[0-9]+]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[TRAP3]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR7]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[HANDLER_CFI_CHECK_FAIL5]]:
+// NO-MERGE-NEXT: [[TMP7:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: [[TMP8:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP7]], i64 [[TMP8]], i64 [[TMP4]]) #[[ATTR7]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[HANDLER_CFI_CHECK_FAIL7]]:
+// NO-MERGE-NEXT: [[TMP9:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: [[TMP10:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP9]], i64 [[TMP10]], i64 [[TMP4]]) #[[ATTR7]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[TRAP9]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR7]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[CONT10]]:
+// NO-MERGE-NEXT: ret void, !nosanitize [[META7]]
+//
+//
+// NO-MERGE-LABEL: define weak void @__cfi_check(
+// NO-MERGE-SAME: i64 noundef [[TMP0:%.*]], ptr noundef [[TMP1:%.*]], ptr noundef [[TMP2:%.*]]) local_unnamed_addr #[[ATTR4:[0-9]+]] align 4096 {
+// NO-MERGE-NEXT: [[ENTRY:.*:]]
+// NO-MERGE-NEXT: [[DOTNOT_I:%.*]] = icmp eq ptr [[TMP2]], null, !nosanitize [[META7]]
+// NO-MERGE-NEXT: br i1 [[DOTNOT_I]], label %[[TRAP_I:.*]], label %[[CONT_I:.*]], !prof [[PROF9]], !nosanitize [[META7]]
+// NO-MERGE: [[TRAP_I]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR6]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[CONT_I]]:
+// NO-MERGE-NEXT: [[TMP3:%.*]] = load i8, ptr [[TMP2]], align 4, !nosanitize [[META7]]
+// NO-MERGE-NEXT: [[TMP4:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP1]], metadata !"all-vtables"), !nosanitize [[META7]]
+// NO-MERGE-NEXT: [[TMP5:%.*]] = zext i1 [[TMP4]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: switch i8 [[TMP3]], label %[[__CFI_CHECK_FAIL_EXIT:.*]] [
+// NO-MERGE-NEXT: i8 0, label %[[HANDLER_CFI_CHECK_FAIL_I:.*]]
+// NO-MERGE-NEXT: i8 1, label %[[TRAP3_I:.*]]
+// NO-MERGE-NEXT: i8 2, label %[[HANDLER_CFI_CHECK_FAIL5_I:.*]]
+// NO-MERGE-NEXT: i8 3, label %[[HANDLER_CFI_CHECK_FAIL7_I:.*]]
+// NO-MERGE-NEXT: i8 4, label %[[TRAP9_I:.*]]
+// NO-MERGE-NEXT: ], !prof [[PROF10]]
+// NO-MERGE: [[HANDLER_CFI_CHECK_FAIL_I]]:
+// NO-MERGE-NEXT: [[TMP6:%.*]] = ptrtoint ptr [[TMP2]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: [[TMP7:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP6]], i64 [[TMP7]], i64 [[TMP5]]) #[[ATTR7]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[TRAP3_I]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR7]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[HANDLER_CFI_CHECK_FAIL5_I]]:
+// NO-MERGE-NEXT: [[TMP8:%.*]] = ptrtoint ptr [[TMP2]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: [[TMP9:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP8]], i64 [[TMP9]], i64 [[TMP5]]) #[[ATTR7]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[HANDLER_CFI_CHECK_FAIL7_I]]:
+// NO-MERGE-NEXT: [[TMP10:%.*]] = ptrtoint ptr [[TMP2]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: [[TMP11:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META7]]
+// NO-MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP10]], i64 [[TMP11]], i64 [[TMP5]]) #[[ATTR7]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[TRAP9_I]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR7]], !nosanitize [[META7]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META7]]
+// NO-MERGE: [[__CFI_CHECK_FAIL_EXIT]]:
+// NO-MERGE-NEXT: ret void
+
+// MERGE: [[ATTR5]] = { nounwind }
+// MERGE: [[ATTR6]] = { noreturn nounwind }
+
+// NO-MERGE: [[ATTR6]] = { noreturn nounwind }
+// NO-MERGE: [[ATTR7]] = { nomerge noreturn nounwind }
diff --git a/clang/test/CodeGen/cfi-check-fail2-nomerge.c b/clang/test/CodeGen/cfi-check-fail2-nomerge.c
new file mode 100644
index 0000000000000..76ebec9c08c11
--- /dev/null
+++ b/clang/test/CodeGen/cfi-check-fail2-nomerge.c
@@ -0,0 +1,206 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --include-generated-funcs --version 5
+// __cfi_check_fail codegen when not all CFI checkers are enabled.
+
+// RUN: %clang_cc1 -triple x86_64-unknown-linux -O3 -fsanitize-cfi-cross-dso \
+// RUN: -fsanitize=cfi-vcall \
+// RUN: -emit-llvm -o - %s | FileCheck %s --check-prefix=NO-MERGE
+
+// RUN: %clang_cc1 -triple x86_64-unknown-linux -O3 -fsanitize-cfi-cross-dso \
+// RUN: -fsanitize=cfi-vcall \
+// RUN: -fsanitize-merge=cfi-vcall \
+// RUN: -emit-llvm -o - %s | FileCheck %s --check-prefix=MERGE
+
+void caller(void (*f)(void)) {
+ f();
+}
+
+// CHECK: define weak_odr hidden void @__cfi_check_fail(ptr noundef %0, ptr noundef %1)
+// CHECK: store ptr %0, ptr %[[ALLOCA0:.*]], align 8
+// CHECK: store ptr %1, ptr %[[ALLOCA1:.*]], align 8
+// CHECK: %[[DATA:.*]] = load ptr, ptr %[[ALLOCA0]], align 8
+// CHECK: %[[ADDR:.*]] = load ptr, ptr %[[ALLOCA1]], align 8
+// CHECK: %[[ICMP_NOT_NULL:.*]] = icmp ne ptr %[[DATA]], null
+// CHECK: br i1 %[[ICMP_NOT_NULL]], label %[[CONT0:.*]], label %[[TRAP:.*]], !prof
+
+// CHECK: [[TRAP]]:
+// CHECK-NEXT: call void @llvm.ubsantrap(i8 2)
+// CHECK-NEXT: unreachable
+
+// CHECK: [[CONT0]]:
+// CHECK: %[[KINDPTR:.*]] = getelementptr {{.*}} %[[DATA]], i32 0, i32 0
+// CHECK: %[[KIND:.*]] = load i8, ptr %[[KINDPTR]], align 4
+// CHECK: %[[VTVALID0:.*]] = call i1 @llvm.type.test(ptr %[[ADDR]], metadata !"all-vtables")
+// CHECK: %[[VTVALID:.*]] = zext i1 %[[VTVALID0]] to i64
+// CHECK: %[[NOT_0:.*]] = icmp ne i8 %[[KIND]], 0
+// CHECK: br i1 %[[NOT_0]], label %[[CONT1:.*]], label %[[HANDLE0:.*]], !prof
+
+// CHECK: [[HANDLE0]]:
+// CHECK: %[[DATA0:.*]] = ptrtoint ptr %[[DATA]] to i64,
+// CHECK: %[[ADDR0:.*]] = ptrtoint ptr %[[ADDR]] to i64,
+// CHECK: call void @__ubsan_handle_cfi_check_fail_abort(i64 %[[DATA0]], i64 %[[ADDR0]], i64 %[[VTVALID]])
+// CHECK: unreachable
+
+// CHECK: [[CONT1]]:
+// CHECK: %[[NOT_1:.*]] = icmp ne i8 %[[KIND]], 1
+// CHECK: br i1 %[[NOT_1]], label %[[CONT2:.*]], label %[[HANDLE1:.*]], !prof
+
+// CHECK: [[HANDLE1]]:
+// CHECK-NEXT: call void @llvm.ubsantrap(i8 2)
+// CHECK-NEXT: unreachable
+
+// CHECK: [[CONT2]]:
+// CHECK: %[[NOT_2:.*]] = icmp ne i8 %[[KIND]], 2
+// CHECK: br i1 %[[NOT_2]], label %[[CONT3:.*]], label %[[HANDLE2:.*]], !prof
+
+// CHECK: [[HANDLE2]]:
+// CHECK-NEXT: call void @llvm.ubsantrap(i8 2)
+// CHECK-NEXT: unreachable
+
+// CHECK: [[CONT3]]:
+// CHECK: %[[NOT_3:.*]] = icmp ne i8 %[[KIND]], 3
+// CHECK: br i1 %[[NOT_3]], label %[[CONT4:.*]], label %[[HANDLE3:.*]], !prof
+
+// CHECK: [[HANDLE3]]:
+// CHECK-NEXT: call void @llvm.ubsantrap(i8 2)
+// CHECK-NEXT: unreachable
+
+// CHECK: [[CONT4]]:
+// CHECK: %[[NOT_4:.*]] = icmp ne i8 %[[KIND]], 4
+// CHECK: br i1 %[[NOT_4]], label %[[CONT5:.*]], label %[[HANDLE4:.*]], !prof
+
+// CHECK: [[HANDLE4]]:
+// CHECK-NEXT: call void @llvm.ubsantrap(i8 2)
+// CHECK-NEXT: unreachable
+
+// CHECK: [[CONT5]]:
+// CHECK: ret void
+// NO-MERGE-LABEL: define dso_local void @caller(
+// NO-MERGE-SAME: ptr noundef readonly captures(none) [[F:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
+// NO-MERGE-NEXT: [[ENTRY:.*:]]
+// NO-MERGE-NEXT: tail call void [[F]]() #[[ATTR5:[0-9]+]]
+// NO-MERGE-NEXT: ret void
+//
+//
+// NO-MERGE-LABEL: define weak_odr hidden void @__cfi_check_fail(
+// NO-MERGE-SAME: ptr noundef [[TMP0:%.*]], ptr noundef [[TMP1:%.*]]) #[[ATTR0]] {
+// NO-MERGE-NEXT: [[ENTRY:.*:]]
+// NO-MERGE-NEXT: [[DOTNOT:%.*]] = icmp eq ptr [[TMP0]], null, !nosanitize [[META3:![0-9]+]]
+// NO-MERGE-NEXT: br i1 [[DOTNOT]], label %[[TRAP:.*]], label %[[CONT:.*]], !prof [[PROF4:![0-9]+]], !nosanitize [[META3]]
+// NO-MERGE: [[TRAP]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR6:[0-9]+]], !nosanitize [[META3]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META3]]
+// NO-MERGE: [[CONT]]:
+// NO-MERGE-NEXT: [[TMP2:%.*]] = load i8, ptr [[TMP0]], align 4, !nosanitize [[META3]]
+// NO-MERGE-NEXT: switch i8 [[TMP2]], label %[[CONT6:.*]] [
+// NO-MERGE-NEXT: i8 0, label %[[HANDLER_CFI_CHECK_FAIL:.*]]
+// NO-MERGE-NEXT: i8 1, label %[[TRAP]]
+// NO-MERGE-NEXT: i8 2, label %[[TRAP]]
+// NO-MERGE-NEXT: i8 3, label %[[TRAP]]
+// NO-MERGE-NEXT: i8 4, label %[[TRAP]]
+// NO-MERGE-NEXT: ], !prof [[PROF5:![0-9]+]]
+// NO-MERGE: [[HANDLER_CFI_CHECK_FAIL]]:
+// NO-MERGE-NEXT: [[TMP3:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP1]], metadata !"all-vtables"), !nosanitize [[META3]]
+// NO-MERGE-NEXT: [[TMP4:%.*]] = zext i1 [[TMP3]] to i64, !nosanitize [[META3]]
+// NO-MERGE-NEXT: [[TMP5:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META3]]
+// NO-MERGE-NEXT: [[TMP6:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META3]]
+// NO-MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP5]], i64 [[TMP6]], i64 [[TMP4]]) #[[ATTR7:[0-9]+]], !nosanitize [[META3]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META3]]
+// NO-MERGE: [[CONT6]]:
+// NO-MERGE-NEXT: ret void, !nosanitize [[META3]]
+//
+//
+// NO-MERGE-LABEL: define weak void @__cfi_check(
+// NO-MERGE-SAME: i64 noundef [[TMP0:%.*]], ptr noundef [[TMP1:%.*]], ptr noundef [[TMP2:%.*]]) local_unnamed_addr #[[ATTR4:[0-9]+]] align 4096 {
+// NO-MERGE-NEXT: [[ENTRY:.*:]]
+// NO-MERGE-NEXT: [[DOTNOT_I:%.*]] = icmp eq ptr [[TMP2]], null, !nosanitize [[META3]]
+// NO-MERGE-NEXT: br i1 [[DOTNOT_I]], label %[[TRAP_I:.*]], label %[[CONT_I:.*]], !prof [[PROF4]], !nosanitize [[META3]]
+// NO-MERGE: [[TRAP_I]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR6]], !nosanitize [[META3]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META3]]
+// NO-MERGE: [[CONT_I]]:
+// NO-MERGE-NEXT: [[TMP3:%.*]] = load i8, ptr [[TMP2]], align 4, !nosanitize [[META3]]
+// NO-MERGE-NEXT: switch i8 [[TMP3]], label %[[__CFI_CHECK_FAIL_EXIT:.*]] [
+// NO-MERGE-NEXT: i8 0, label %[[HANDLER_CFI_CHECK_FAIL_I:.*]]
+// NO-MERGE-NEXT: i8 1, label %[[TRAP_I]]
+// NO-MERGE-NEXT: i8 2, label %[[TRAP_I]]
+// NO-MERGE-NEXT: i8 3, label %[[TRAP_I]]
+// NO-MERGE-NEXT: i8 4, label %[[TRAP_I]]
+// NO-MERGE-NEXT: ], !prof [[PROF5]]
+// NO-MERGE: [[HANDLER_CFI_CHECK_FAIL_I]]:
+// NO-MERGE-NEXT: [[TMP4:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP1]], metadata !"all-vtables"), !nosanitize [[META3]]
+// NO-MERGE-NEXT: [[TMP5:%.*]] = zext i1 [[TMP4]] to i64, !nosanitize [[META3]]
+// NO-MERGE-NEXT: [[TMP6:%.*]] = ptrtoint ptr [[TMP2]] to i64, !nosanitize [[META3]]
+// NO-MERGE-NEXT: [[TMP7:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META3]]
+// NO-MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP6]], i64 [[TMP7]], i64 [[TMP5]]) #[[ATTR7]], !nosanitize [[META3]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META3]]
+// NO-MERGE: [[__CFI_CHECK_FAIL_EXIT]]:
+// NO-MERGE-NEXT: ret void
+//
+//
+// MERGE-LABEL: define dso_local void @caller(
+// MERGE-SAME: ptr noundef readonly captures(none) [[F:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
+// MERGE-NEXT: [[ENTRY:.*:]]
+// MERGE-NEXT: tail call void [[F]]() #[[ATTR5:[0-9]+]]
+// MERGE-NEXT: ret void
+//
+//
+// MERGE-LABEL: define weak_odr hidden void @__cfi_check_fail(
+// MERGE-SAME: ptr noundef [[TMP0:%.*]], ptr noundef [[TMP1:%.*]]) #[[ATTR0]] {
+// MERGE-NEXT: [[ENTRY:.*:]]
+// MERGE-NEXT: [[DOTNOT:%.*]] = icmp eq ptr [[TMP0]], null, !nosanitize [[META3:![0-9]+]]
+// MERGE-NEXT: br i1 [[DOTNOT]], label %[[TRAP:.*]], label %[[CONT:.*]], !prof [[PROF4:![0-9]+]], !nosanitize [[META3]]
+// MERGE: [[TRAP]]:
+// MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR6:[0-9]+]], !nosanitize [[META3]]
+// MERGE-NEXT: unreachable, !nosanitize [[META3]]
+// MERGE: [[CONT]]:
+// MERGE-NEXT: [[TMP2:%.*]] = load i8, ptr [[TMP0]], align 4, !nosanitize [[META3]]
+// MERGE-NEXT: switch i8 [[TMP2]], label %[[CONT6:.*]] [
+// MERGE-NEXT: i8 0, label %[[HANDLER_CFI_CHECK_FAIL:.*]]
+// MERGE-NEXT: i8 1, label %[[TRAP]]
+// MERGE-NEXT: i8 2, label %[[TRAP]]
+// MERGE-NEXT: i8 3, label %[[TRAP]]
+// MERGE-NEXT: i8 4, label %[[TRAP]]
+// MERGE-NEXT: ], !prof [[PROF5:![0-9]+]]
+// MERGE: [[HANDLER_CFI_CHECK_FAIL]]:
+// MERGE-NEXT: [[TMP3:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP1]], metadata !"all-vtables"), !nosanitize [[META3]]
+// MERGE-NEXT: [[TMP4:%.*]] = zext i1 [[TMP3]] to i64, !nosanitize [[META3]]
+// MERGE-NEXT: [[TMP5:%.*]] = ptrtoint ptr [[TMP0]] to i64, !nosanitize [[META3]]
+// MERGE-NEXT: [[TMP6:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META3]]
+// MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP5]], i64 [[TMP6]], i64 [[TMP4]]) #[[ATTR6]], !nosanitize [[META3]]
+// MERGE-NEXT: unreachable, !nosanitize [[META3]]
+// MERGE: [[CONT6]]:
+// MERGE-NEXT: ret void, !nosanitize [[META3]]
+//
+//
+// MERGE-LABEL: define weak void @__cfi_check(
+// MERGE-SAME: i64 noundef [[TMP0:%.*]], ptr noundef [[TMP1:%.*]], ptr noundef [[TMP2:%.*]]) local_unnamed_addr #[[ATTR4:[0-9]+]] align 4096 {
+// MERGE-NEXT: [[ENTRY:.*:]]
+// MERGE-NEXT: [[DOTNOT_I:%.*]] = icmp eq ptr [[TMP2]], null, !nosanitize [[META3]]
+// MERGE-NEXT: br i1 [[DOTNOT_I]], label %[[TRAP_I:.*]], label %[[CONT_I:.*]], !prof [[PROF4]], !nosanitize [[META3]]
+// MERGE: [[TRAP_I]]:
+// MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR6]], !nosanitize [[META3]]
+// MERGE-NEXT: unreachable, !nosanitize [[META3]]
+// MERGE: [[CONT_I]]:
+// MERGE-NEXT: [[TMP3:%.*]] = load i8, ptr [[TMP2]], align 4, !nosanitize [[META3]]
+// MERGE-NEXT: switch i8 [[TMP3]], label %[[__CFI_CHECK_FAIL_EXIT:.*]] [
+// MERGE-NEXT: i8 0, label %[[HANDLER_CFI_CHECK_FAIL_I:.*]]
+// MERGE-NEXT: i8 1, label %[[TRAP_I]]
+// MERGE-NEXT: i8 2, label %[[TRAP_I]]
+// MERGE-NEXT: i8 3, label %[[TRAP_I]]
+// MERGE-NEXT: i8 4, label %[[TRAP_I]]
+// MERGE-NEXT: ], !prof [[PROF5]]
+// MERGE: [[HANDLER_CFI_CHECK_FAIL_I]]:
+// MERGE-NEXT: [[TMP4:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP1]], metadata !"all-vtables"), !nosanitize [[META3]]
+// MERGE-NEXT: [[TMP5:%.*]] = zext i1 [[TMP4]] to i64, !nosanitize [[META3]]
+// MERGE-NEXT: [[TMP6:%.*]] = ptrtoint ptr [[TMP2]] to i64, !nosanitize [[META3]]
+// MERGE-NEXT: [[TMP7:%.*]] = ptrtoint ptr [[TMP1]] to i64, !nosanitize [[META3]]
+// MERGE-NEXT: tail call void @__ubsan_handle_cfi_check_fail_abort(i64 [[TMP6]], i64 [[TMP7]], i64 [[TMP5]]) #[[ATTR6]], !nosanitize [[META3]]
+// MERGE-NEXT: unreachable, !nosanitize [[META3]]
+// MERGE: [[__CFI_CHECK_FAIL_EXIT]]:
+// MERGE-NEXT: ret void
+
+// MERGE: [[ATTR5]] = { nounwind }
+// MERGE: [[ATTR6]] = { noreturn nounwind }
+
+// NO-MERGE: [[ATTR6]] = { noreturn nounwind }
+// NO-MERGE: [[ATTR7]] = { nomerge noreturn nounwind }
diff --git a/clang/test/CodeGenCXX/cfi-mfcall-nomerge.cpp b/clang/test/CodeGenCXX/cfi-mfcall-nomerge.cpp
new file mode 100644
index 0000000000000..c1ee5af7254a0
--- /dev/null
+++ b/clang/test/CodeGenCXX/cfi-mfcall-nomerge.cpp
@@ -0,0 +1,131 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --include-generated-funcs --version 5
+// with MERGE/NO-MERGE assertions added manually.
+
+// N.B. although the clang driver defaults to merge, clang_cc1 defaults to non-merge.
+// (This is similar to -fsanitize-recover, for which the default is also applied
+// at the driver level only.)
+
+// If optimization is disabled, merging is disabled (overrides -fsanitize-merge).
+
+// RUN: %clang_cc1 -O3 -triple x86_64-unknown-linux -fsanitize=cfi-mfcall -fsanitize-trap=cfi-mfcall -fvisibility=hidden -emit-llvm -o - %s | FileCheck %s --check-prefixes=NO-MERGE
+// RUN: %clang_cc1 -O3 -triple x86_64-unknown-linux -fsanitize-merge=cfi-mfcall -fsanitize=cfi-mfcall -fsanitize-trap=cfi-mfcall -fvisibility=hidden -emit-llvm -o - %s | FileCheck %s --check-prefixes=MERGE
+
+struct B1 {};
+struct B2 {};
+struct B3 : B2 {};
+struct S : B1, B3 {};
+
+void f(S *s, void (S::*p)()) {
+ (s->*p)();
+ (s->*p)();
+ (s->*p)();
+}
+
+// NO-MERGE-LABEL: define hidden void @_Z1fP1SMS_FvvE(
+// NO-MERGE-SAME: ptr noundef [[S:%.*]], i64 [[P_COERCE0:%.*]], i64 [[P_COERCE1:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
+// NO-MERGE-NEXT: [[ENTRY:.*:]]
+// NO-MERGE-NEXT: [[TMP0:%.*]] = getelementptr inbounds i8, ptr [[S]], i64 [[P_COERCE1]]
+// NO-MERGE-NEXT: [[TMP1:%.*]] = and i64 [[P_COERCE0]], 1
+// NO-MERGE-NEXT: [[MEMPTR_ISVIRTUAL_NOT:%.*]] = icmp eq i64 [[TMP1]], 0
+// NO-MERGE-NEXT: br i1 [[MEMPTR_ISVIRTUAL_NOT]], label %[[MEMPTR_NONVIRTUAL:.*]], label %[[MEMPTR_VIRTUAL:.*]]
+// NO-MERGE: [[MEMPTR_VIRTUAL]]:
+// NO-MERGE-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA2:![0-9]+]]
+// NO-MERGE-NEXT: [[TMP2:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 [[P_COERCE0]]
+// NO-MERGE-NEXT: [[TMP3:%.*]] = getelementptr i8, ptr [[TMP2]], i64 -1
+// NO-MERGE-NEXT: [[TMP4:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP3]], metadata !"_ZTSM1SFvvE.virtual"), !nosanitize [[META5:![0-9]+]]
+// NO-MERGE-NEXT: br i1 [[TMP4]], label %[[MEMPTR_VIRTUAL7:.*]], label %[[TRAP:.*]], !prof [[PROF6:![0-9]+]], !nosanitize [[META5]]
+// NO-MERGE: [[TRAP]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR3:[0-9]+]], !nosanitize [[META5]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META5]]
+// NO-MERGE: [[MEMPTR_NONVIRTUAL]]:
+// NO-MERGE-NEXT: [[MEMPTR_NONVIRTUALFN:%.*]] = inttoptr i64 [[P_COERCE0]] to ptr
+// NO-MERGE-NEXT: [[TMP5:%.*]] = tail call i1 @llvm.type.test(ptr [[MEMPTR_NONVIRTUALFN]], metadata !"_ZTSM2B1FvvE")
+// NO-MERGE-NEXT: [[TMP6:%.*]] = tail call i1 @llvm.type.test(ptr [[MEMPTR_NONVIRTUALFN]], metadata !"_ZTSM2B2FvvE")
+// NO-MERGE-NEXT: [[TMP7:%.*]] = or i1 [[TMP5]], [[TMP6]], !nosanitize [[META5]]
+// NO-MERGE-NEXT: br i1 [[TMP7]], label %[[MEMPTR_NONVIRTUAL23:.*]], label %[[TRAP2:.*]], !prof [[PROF6]], !nosanitize [[META5]]
+// NO-MERGE: [[TRAP2]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR4:[0-9]+]], !nosanitize [[META5]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META5]]
+// NO-MERGE: [[MEMPTR_VIRTUAL7]]:
+// NO-MERGE-NEXT: [[MEMPTR_VIRTUALFN:%.*]] = load ptr, ptr [[TMP3]], align 8, !nosanitize [[META5]]
+// NO-MERGE-NEXT: tail call void [[MEMPTR_VIRTUALFN]](ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]]) #[[ATTR5:[0-9]+]]
+// NO-MERGE-NEXT: [[VTABLE8:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA2]]
+// NO-MERGE-NEXT: [[TMP8:%.*]] = getelementptr i8, ptr [[VTABLE8]], i64 [[P_COERCE0]]
+// NO-MERGE-NEXT: [[TMP9:%.*]] = getelementptr i8, ptr [[TMP8]], i64 -1
+// NO-MERGE-NEXT: [[TMP10:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP9]], metadata !"_ZTSM1SFvvE.virtual"), !nosanitize [[META5]]
+// NO-MERGE-NEXT: br i1 [[TMP10]], label %[[MEMPTR_VIRTUAL19:.*]], label %[[TRAP2]], !prof [[PROF6]], !nosanitize [[META5]]
+// NO-MERGE: [[TRAP13:.*]]:
+// NO-MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR4]], !nosanitize [[META5]]
+// NO-MERGE-NEXT: unreachable, !nosanitize [[META5]]
+// NO-MERGE: [[MEMPTR_VIRTUAL19]]:
+// NO-MERGE-NEXT: [[MEMPTR_VIRTUALFN9:%.*]] = load ptr, ptr [[TMP9]], align 8, !nosanitize [[META5]]
+// NO-MERGE-NEXT: tail call void [[MEMPTR_VIRTUALFN9]](ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]]) #[[ATTR5]]
+// NO-MERGE-NEXT: [[VTABLE20:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA2]]
+// NO-MERGE-NEXT: [[TMP11:%.*]] = getelementptr i8, ptr [[VTABLE20]], i64 [[P_COERCE0]]
+// NO-MERGE-NEXT: [[TMP12:%.*]] = getelementptr i8, ptr [[TMP11]], i64 -1
+// NO-MERGE-NEXT: [[TMP13:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP12]], metadata !"_ZTSM1SFvvE.virtual"), !nosanitize [[META5]]
+// NO-MERGE-NEXT: [[MEMPTR_VIRTUALFN21:%.*]] = load ptr, ptr [[TMP12]], align 8, !nosanitize [[META5]]
+// NO-MERGE-NEXT: br i1 [[TMP13]], label %[[MEMPTR_END27:.*]], label %[[TRAP13]], !prof [[PROF6]], !nosanitize [[META5]]
+// NO-MERGE: [[MEMPTR_NONVIRTUAL23]]:
+// NO-MERGE-NEXT: tail call void [[MEMPTR_NONVIRTUALFN]](ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]]) #[[ATTR5]]
+// NO-MERGE-NEXT: tail call void [[MEMPTR_NONVIRTUALFN]](ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]]) #[[ATTR5]]
+// NO-MERGE-NEXT: br label %[[MEMPTR_END27]]
+// NO-MERGE: [[MEMPTR_END27]]:
+// NO-MERGE-NEXT: [[TMP14:%.*]] = phi ptr [ [[MEMPTR_VIRTUALFN21]], %[[MEMPTR_VIRTUAL19]] ], [ [[MEMPTR_NONVIRTUALFN]], %[[MEMPTR_NONVIRTUAL23]] ]
+// NO-MERGE-NEXT: tail call void [[TMP14]](ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]]) #[[ATTR5]]
+// NO-MERGE-NEXT: ret void
+//
+//
+// MERGE-LABEL: define hidden void @_Z1fP1SMS_FvvE(
+// MERGE-SAME: ptr noundef [[S:%.*]], i64 [[P_COERCE0:%.*]], i64 [[P_COERCE1:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
+// MERGE-NEXT: [[ENTRY:.*:]]
+// MERGE-NEXT: [[TMP0:%.*]] = getelementptr inbounds i8, ptr [[S]], i64 [[P_COERCE1]]
+// MERGE-NEXT: [[TMP1:%.*]] = and i64 [[P_COERCE0]], 1
+// MERGE-NEXT: [[MEMPTR_ISVIRTUAL_NOT:%.*]] = icmp eq i64 [[TMP1]], 0
+// MERGE-NEXT: br i1 [[MEMPTR_ISVIRTUAL_NOT]], label %[[MEMPTR_NONVIRTUAL:.*]], label %[[MEMPTR_VIRTUAL:.*]]
+// MERGE: [[MEMPTR_VIRTUAL]]:
+// MERGE-NEXT: [[VTABLE:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA2:![0-9]+]]
+// MERGE-NEXT: [[TMP2:%.*]] = getelementptr i8, ptr [[VTABLE]], i64 [[P_COERCE0]]
+// MERGE-NEXT: [[TMP3:%.*]] = getelementptr i8, ptr [[TMP2]], i64 -1
+// MERGE-NEXT: [[TMP4:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP3]], metadata !"_ZTSM1SFvvE.virtual"), !nosanitize [[META5:![0-9]+]]
+// MERGE-NEXT: br i1 [[TMP4]], label %[[MEMPTR_VIRTUAL6:.*]], label %[[TRAP:.*]], !prof [[PROF6:![0-9]+]], !nosanitize [[META5]]
+// MERGE: [[TRAP]]:
+// MERGE-NEXT: tail call void @llvm.ubsantrap(i8 2) #[[ATTR3:[0-9]+]], !nosanitize [[META5]]
+// MERGE-NEXT: unreachable, !nosanitize [[META5]]
+// MERGE: [[MEMPTR_NONVIRTUAL]]:
+// MERGE-NEXT: [[MEMPTR_NONVIRTUALFN:%.*]] = inttoptr i64 [[P_COERCE0]] to ptr
+// MERGE-NEXT: [[TMP5:%.*]] = tail call i1 @llvm.type.test(ptr [[MEMPTR_NONVIRTUALFN]], metadata !"_ZTSM2B1FvvE")
+// MERGE-NEXT: [[TMP6:%.*]] = tail call i1 @llvm.type.test(ptr [[MEMPTR_NONVIRTUALFN]], metadata !"_ZTSM2B2FvvE")
+// MERGE-NEXT: [[TMP7:%.*]] = or i1 [[TMP5]], [[TMP6]], !nosanitize [[META5]]
+// MERGE-NEXT: br i1 [[TMP7]], label %[[MEMPTR_NONVIRTUAL21:.*]], label %[[TRAP]], !prof [[PROF6]], !nosanitize [[META5]]
+// MERGE: [[MEMPTR_VIRTUAL6]]:
+// MERGE-NEXT: [[MEMPTR_VIRTUALFN:%.*]] = load ptr, ptr [[TMP3]], align 8, !nosanitize [[META5]]
+// MERGE-NEXT: tail call void [[MEMPTR_VIRTUALFN]](ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]]) #[[ATTR4:[0-9]+]]
+// MERGE-NEXT: [[VTABLE7:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA2]]
+// MERGE-NEXT: [[TMP8:%.*]] = getelementptr i8, ptr [[VTABLE7]], i64 [[P_COERCE0]]
+// MERGE-NEXT: [[TMP9:%.*]] = getelementptr i8, ptr [[TMP8]], i64 -1
+// MERGE-NEXT: [[TMP10:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP9]], metadata !"_ZTSM1SFvvE.virtual"), !nosanitize [[META5]]
+// MERGE-NEXT: br i1 [[TMP10]], label %[[MEMPTR_VIRTUAL17:.*]], label %[[TRAP]], !prof [[PROF6]], !nosanitize [[META5]]
+// MERGE: [[MEMPTR_VIRTUAL17]]:
+// MERGE-NEXT: [[MEMPTR_VIRTUALFN8:%.*]] = load ptr, ptr [[TMP9]], align 8, !nosanitize [[META5]]
+// MERGE-NEXT: tail call void [[MEMPTR_VIRTUALFN8]](ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]]) #[[ATTR4]]
+// MERGE-NEXT: [[VTABLE18:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA2]]
+// MERGE-NEXT: [[TMP11:%.*]] = getelementptr i8, ptr [[VTABLE18]], i64 [[P_COERCE0]]
+// MERGE-NEXT: [[TMP12:%.*]] = getelementptr i8, ptr [[TMP11]], i64 -1
+// MERGE-NEXT: [[TMP13:%.*]] = tail call i1 @llvm.type.test(ptr [[TMP12]], metadata !"_ZTSM1SFvvE.virtual"), !nosanitize [[META5]]
+// MERGE-NEXT: [[MEMPTR_VIRTUALFN19:%.*]] = load ptr, ptr [[TMP12]], align 8, !nosanitize [[META5]]
+// MERGE-NEXT: br i1 [[TMP13]], label %[[MEMPTR_END24:.*]], label %[[TRAP]], !prof [[PROF6]], !nosanitize [[META5]]
+// MERGE: [[MEMPTR_NONVIRTUAL21]]:
+// MERGE-NEXT: tail call void [[MEMPTR_NONVIRTUALFN]](ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]]) #[[ATTR4]]
+// MERGE-NEXT: tail call void [[MEMPTR_NONVIRTUALFN]](ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]]) #[[ATTR4]]
+// MERGE-NEXT: br label %[[MEMPTR_END24]]
+// MERGE: [[MEMPTR_END24]]:
+// MERGE-NEXT: [[TMP14:%.*]] = phi ptr [ [[MEMPTR_VIRTUALFN19]], %[[MEMPTR_VIRTUAL17]] ], [ [[MEMPTR_NONVIRTUALFN]], %[[MEMPTR_NONVIRTUAL21]] ]
+// MERGE-NEXT: tail call void [[TMP14]](ptr noundef nonnull align 1 dereferenceable(1) [[TMP0]]) #[[ATTR4]]
+// MERGE-NEXT: ret void
+
+// MERGE: [[ATTR3]] = { noreturn nounwind }
+// MERGE: [[ATTR4]] = { nounwind }
+
+// NO-MERGE: [[ATTR4]] = { nomerge noreturn nounwind }
+// NO-MERGE: [[ATTR5]] = { nounwind }
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