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84a3aadf0f2483dde0acfc4e79f2a075a5f35bd1
clang-p2996/clang/test/OpenMP/target_parallel_for_depend_codegen.cpp
Aaron Ballman 84a3aadf0f Diagnose use of VLAs in C++ by default 
Reapplication of 7339c0f782 with a fix
for a crash involving arrays without a size expression.

Clang supports VLAs in C++ as an extension, but we currently only warn
on their use when you pass -Wvla, -Wvla-extension, or -pedantic.
However, VLAs as they're expressed in C have been considered by WG21
and rejected, are easy to use accidentally to the surprise of users
(e.g., https://ddanilov.me/default-non-standard-features/), and they
have potential security implications beyond constant-size arrays
(https://wiki.sei.cmu.edu/confluence/display/c/ARR32-C.+Ensure+size+arguments+for+variable+length+arrays+are+in+a+valid+range).
C++ users should strongly consider using other functionality such as
std::vector instead.

This seems like sufficiently compelling evidence to warn users about
VLA use by default in C++ modes. This patch enables the -Wvla-extension
diagnostic group in C++ language modes by default, and adds the warning
group to -Wall in GNU++ language modes. The warning is still opt-in in
C language modes, where support for VLAs is somewhat less surprising to
users.

RFC: https://discourse.llvm.org/t/rfc-diagnosing-use-of-vlas-in-c/73109
Fixes https://github.com/llvm/llvm-project/issues/62836
Differential Revision: https://reviews.llvm.org/D156565
2023-10-20 13:10:03 -04:00

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// Test host codegen.
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp -fopenmp-version=45 -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix CHECK --check-prefix CHECK-64
// RUN: %clang_cc1 -fopenmp -fopenmp-version=45 -x c++ -std=c++11 -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -emit-pch -o %t %s
// RUN: %clang_cc1 -fopenmp -fopenmp-version=45 -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -std=c++11 -include-pch %t -verify -Wno-vla %s -emit-llvm -o - | FileCheck %s --check-prefix CHECK --check-prefix CHECK-64
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp -fopenmp-version=45 -x c++ -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix CHECK --check-prefix CHECK-32
// RUN: %clang_cc1 -fopenmp -fopenmp-version=45 -x c++ -std=c++11 -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -emit-pch -o %t %s
// RUN: %clang_cc1 -fopenmp -fopenmp-version=45 -x c++ -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -std=c++11 -include-pch %t -verify -Wno-vla %s -emit-llvm -o - | FileCheck %s --check-prefix CHECK --check-prefix CHECK-32
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp-simd -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -emit-llvm %s -o - | FileCheck --check-prefix SIMD-ONLY0 %s
// RUN: %clang_cc1 -fopenmp-simd -x c++ -std=c++11 -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -emit-pch -o %t %s
// RUN: %clang_cc1 -fopenmp-simd -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -std=c++11 -include-pch %t -verify -Wno-vla %s -emit-llvm -o - | FileCheck --check-prefix SIMD-ONLY0 %s
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp-simd -x c++ -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -emit-llvm %s -o - | FileCheck --check-prefix SIMD-ONLY0 %s
// RUN: %clang_cc1 -fopenmp-simd -x c++ -std=c++11 -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -emit-pch -o %t %s
// RUN: %clang_cc1 -fopenmp-simd -x c++ -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -std=c++11 -include-pch %t -verify -Wno-vla %s -emit-llvm -o - | FileCheck --check-prefix SIMD-ONLY0 %s
// SIMD-ONLY0-NOT: {{__kmpc|__tgt}}
// Test target codegen - host bc file has to be created first.
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp -fopenmp-version=45 -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -emit-llvm-bc %s -o %t-ppc-host.bc
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp -fopenmp-version=45 -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -emit-llvm %s -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-ppc-host.bc -o - | FileCheck %s --check-prefix TCHECK --check-prefix TCHECK-64
// RUN: %clang_cc1 -fopenmp -fopenmp-version=45 -x c++ -std=c++11 -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -emit-pch -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-ppc-host.bc -o %t %s
// RUN: %clang_cc1 -fopenmp -fopenmp-version=45 -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -std=c++11 -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-ppc-host.bc -include-pch %t -verify -Wno-vla %s -emit-llvm -o - | FileCheck %s --check-prefix TCHECK --check-prefix TCHECK-64
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp -fopenmp-version=45 -x c++ -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -emit-llvm-bc %s -o %t-x86-host.bc
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp -fopenmp-version=45 -x c++ -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -emit-llvm %s -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-x86-host.bc -o - | FileCheck %s --check-prefix TCHECK --check-prefix TCHECK-32
// RUN: %clang_cc1 -fopenmp -fopenmp-version=45 -x c++ -std=c++11 -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -emit-pch -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-x86-host.bc -o %t %s
// RUN: %clang_cc1 -fopenmp -fopenmp-version=45 -x c++ -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -std=c++11 -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-x86-host.bc -include-pch %t -verify -Wno-vla %s -emit-llvm -o - | FileCheck %s --check-prefix TCHECK --check-prefix TCHECK-32
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp-simd -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -emit-llvm-bc %s -o %t-ppc-host.bc
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp-simd -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -emit-llvm %s -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-ppc-host.bc -o - | FileCheck --check-prefix SIMD-ONLY1 %s
// RUN: %clang_cc1 -fopenmp-simd -x c++ -std=c++11 -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -emit-pch -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-ppc-host.bc -o %t %s
// RUN: %clang_cc1 -fopenmp-simd -x c++ -triple powerpc64le-unknown-unknown -fopenmp-targets=powerpc64le-ibm-linux-gnu -std=c++11 -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-ppc-host.bc -include-pch %t -verify -Wno-vla %s -emit-llvm -o - | FileCheck --check-prefix SIMD-ONLY1 %s
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp-simd -x c++ -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -emit-llvm-bc %s -o %t-x86-host.bc
// RUN: %clang_cc1 -verify -Wno-vla -fopenmp-simd -x c++ -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -emit-llvm %s -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-x86-host.bc -o - | FileCheck --check-prefix SIMD-ONLY1 %s
// RUN: %clang_cc1 -fopenmp-simd -x c++ -std=c++11 -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -emit-pch -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-x86-host.bc -o %t %s
// RUN: %clang_cc1 -fopenmp-simd -x c++ -triple i386-unknown-unknown -fopenmp-targets=i386-pc-linux-gnu -std=c++11 -fopenmp-is-target-device -fopenmp-host-ir-file-path %t-x86-host.bc -include-pch %t -verify -Wno-vla %s -emit-llvm -o - | FileCheck --check-prefix SIMD-ONLY1 %s
// SIMD-ONLY1-NOT: {{__kmpc|__tgt}}
// expected-no-diagnostics
#ifndef HEADER
#define HEADER
// CHECK-DAG: [[TT:%.+]] = type { i64, i8 }
// CHECK-DAG: [[ENTTY:%.+]] = type { ptr, ptr, i[[SZ:32|64]], i32, i32 }
// TCHECK: [[ENTTY:%.+]] = type { ptr, ptr, i{{32|64}}, i32, i32 }
// CHECK-DAG: [[SIZET:@.+]] = private unnamed_addr constant [2 x i64] [i64 0, i64 4]
// CHECK-DAG: [[MAPT:@.+]] = private unnamed_addr constant [2 x i64] [i64 544, i64 800]
// CHECK-DAG: @{{.*}} = weak constant i8 0
// TCHECK: @{{.+}} = weak constant [[ENTTY]]
// TCHECK: @{{.+}} = {{.*}}constant [[ENTTY]]
// TCHECK-NOT: @{{.+}} = weak constant [[ENTTY]]
// Check target registration is registered as a Ctor.
// CHECK: appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 0, ptr @.omp_offloading.requires_reg, ptr null }]
template<typename tx, typename ty>
struct TT{
tx X;
ty Y;
};
int global;
extern int global;
// CHECK: define {{.*}}[[FOO:@.+]](
int foo(int n) {
int a = 0;
short aa = 0;
float b[10];
float bn[n];
double c[5][10];
double cn[5][n];
TT<long long, char> d;
static long *plocal;
// CHECK: [[ADD:%.+]] = add nsw i32
// CHECK: store i32 [[ADD]], ptr [[DEVICE_CAP:%.+]],
// CHECK: [[GEP:%.+]] = getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 0
// CHECK: [[DEV:%.+]] = load i32, ptr [[DEVICE_CAP]],
// CHECK: store i32 [[DEV]], ptr [[GEP]],
// CHECK: [[TASK:%.+]] = call ptr @__kmpc_omp_task_alloc(ptr [[IN:@.+]], i32 [[GTID:%.+]], i32 1, i[[SZ]] {{20|40}}, i[[SZ]] 4, ptr [[TASK_ENTRY0:@.+]])
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 0
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 1
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 2
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 3
// CHECK: call void @__kmpc_omp_taskwait_deps_51(ptr [[IN]], i32 [[GTID]], i32 4, ptr %{{.+}}, i32 0, ptr null, i32 0)
// CHECK: call void @__kmpc_omp_task_begin_if0(ptr [[IN]], i32 [[GTID]], ptr [[TASK]])
// CHECK: call i32 [[TASK_ENTRY0]](i32 [[GTID]], ptr [[TASK]])
// CHECK: call void @__kmpc_omp_task_complete_if0(ptr [[IN]], i32 [[GTID]], ptr [[TASK]])
#pragma omp target parallel for device(global + a) depend(in: global) depend(out: a, b, cn[4])
for (int i = 0; i < 10; ++i) {
}
// CHECK: [[ADD:%.+]] = add nsw i32
// CHECK: store i32 [[ADD]], ptr [[DEVICE_CAP:%.+]],
// CHECK: [[BOOL:%.+]] = icmp ne i32 %{{.+}}, 0
// CHECK: br i1 [[BOOL]], label %[[THEN:.+]], label %[[ELSE:.+]]
// CHECK: [[THEN]]:
// CHECK-DAG: [[BPADDR0:%.+]] = getelementptr inbounds [2 x ptr], ptr [[BP:%.+]], i32 0, i32 0
// CHECK-DAG: [[PADDR0:%.+]] = getelementptr inbounds [2 x ptr], ptr [[P:%.+]], i32 0, i32 0
// CHECK-DAG: store ptr [[BP0:%[^,]+]], ptr [[BPADDR0]]
// CHECK-DAG: store ptr [[BP0]], ptr [[PADDR0]]
// CHECK-DAG: [[BPADDR1:%.+]] = getelementptr inbounds [2 x ptr], ptr [[BP]], i32 0, i32 1
// CHECK-DAG: [[PADDR1:%.+]] = getelementptr inbounds [2 x ptr], ptr [[P]], i32 0, i32 1
// CHECK-DAG: store i[[SZ]] [[BP1:%[^,]+]], ptr [[BPADDR1]]
// CHECK-DAG: store i[[SZ]] [[BP1]], ptr [[PADDR1]]
// CHECK-DAG: getelementptr inbounds [2 x ptr], ptr [[BP]], i32 0, i32 0
// CHECK-DAG: getelementptr inbounds [2 x ptr], ptr [[P]], i32 0, i32 0
// CHECK: [[GEP:%.+]] = getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 2
// CHECK: [[DEV:%.+]] = load i32, ptr [[DEVICE_CAP]],
// CHECK: store i32 [[DEV]], ptr [[GEP]],
// CHECK: [[DEV1:%.+]] = load i32, ptr [[DEVICE_CAP]],
// CHECK: [[DEV2:%.+]] = sext i32 [[DEV1]] to i64
// CHECK: [[TASK:%.+]] = call ptr @__kmpc_omp_target_task_alloc(ptr [[IN]], i32 [[GTID]], i32 1, i[[SZ]] {{104|60}}, i[[SZ]] {{16|12}}, ptr [[TASK_ENTRY1_:@.+]], i64 [[DEV2]])
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 0
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 1
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 2
// CHECK: call i32 @__kmpc_omp_task_with_deps(ptr [[IN]], i32 [[GTID]], ptr [[TASK]], i32 3, ptr %{{.+}}, i32 0, ptr null)
// CHECK: br label %[[EXIT:.+]]
// CHECK: [[ELSE]]:
// CHECK-NOT: getelementptr inbounds [2 x ptr], ptr
// CHECK: [[GEP:%.+]] = getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 2
// CHECK: [[DEV:%.+]] = load i32, ptr [[DEVICE_CAP]],
// CHECK: store i32 [[DEV]], ptr [[GEP]],
// CHECK: [[DEV1:%.+]] = load i32, ptr [[DEVICE_CAP]],
// CHECK: [[DEV2:%.+]] = sext i32 [[DEV1]] to i64
// CHECK: [[TASK:%.+]] = call ptr @__kmpc_omp_target_task_alloc(ptr [[IN]], i32 [[GTID]], i32 1, i[[SZ]] {{56|28}}, i[[SZ]] {{16|12}}, ptr [[TASK_ENTRY1__:@.+]], i64 [[DEV2]])
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 0
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 1
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 2
// CHECK: call i32 @__kmpc_omp_task_with_deps(ptr [[IN]], i32 [[GTID]], ptr [[TASK]], i32 3, ptr %{{.+}}, i32 0, ptr null)
// CHECK: br label %[[EXIT:.+]]
// CHECK: [[EXIT]]:
#pragma omp target parallel for device(global + a) nowait depend(inout: global, a, bn) if(target:a)
for (int i = 0; i < *plocal; ++i) {
static int local1;
*plocal = global;
local1 = global;
}
// CHECK: [[TASK:%.+]] = call ptr @__kmpc_omp_task_alloc(ptr [[IN]], i32 [[GTID]], i32 1, i[[SZ]] {{48|24}}, i[[SZ]] 4, ptr [[TASK_ENTRY2:@.+]])
// CHECK: getelementptr %struct.kmp_depend_info, ptr %{{.+}}, i[[SZ]] 0
// CHECK: call void @__kmpc_omp_taskwait_deps_51(ptr [[IN]], i32 [[GTID]], i32 1, ptr %{{.+}}, i32 0, ptr null, i32 0)
// CHECK: call void @__kmpc_omp_task_begin_if0(ptr [[IN]], i32 [[GTID]], ptr [[TASK]])
// CHECK: call i32 [[TASK_ENTRY2]](i32 [[GTID]], ptr [[TASK]])
// CHECK: call void @__kmpc_omp_task_complete_if0(ptr [[IN]], i32 [[GTID]], ptr [[TASK]])
#pragma omp target parallel for if(0) firstprivate(global) depend(out:global)
for (int i = 0; i < global; ++i) {
global += 1;
}
return a;
}
// Check that the offloading functions are emitted and that the arguments are
// correct and loaded correctly for the target regions in foo().
// CHECK: define internal void [[HVT0:@.+]]()
// CHECK: define internal{{.*}} i32 [[TASK_ENTRY0]](i32{{.*}}, ptr noalias noundef %1)
// CHECK: store ptr null, ptr %
// CHECK: [[DEVICE_CAP:%.+]] = load ptr,
// CHECK: [[DEV:%.+]] = load i32, ptr [[DEVICE_CAP]],
// CHECK: [[DEVICE:%.+]] = sext i32 [[DEV]] to i64
// CHECK: [[RET:%.+]] = call i32 @__tgt_target_kernel(ptr @{{.+}}, i64 [[DEVICE]], i32 1, i32 0, ptr @.{{.+}}.region_id, ptr %{{.+}})
// CHECK-NEXT: [[ERROR:%.+]] = icmp ne i32 [[RET]], 0
// CHECK-NEXT: br i1 [[ERROR]], label %[[FAIL:[^,]+]], label %[[END:[^,]+]]
// CHECK: [[FAIL]]
// CHECK: call void [[HVT0]]()
// CHECK-NEXT: br label %[[END]]
// CHECK: [[END]]
// CHECK: ret i32 0
// CHECK: define internal void [[HVT1:@.+]](ptr noundef %{{.+}}, i[[SZ]] noundef %{{.+}})
// CHECK: define internal{{.*}} i32 [[TASK_ENTRY1_]](i32{{.*}}, ptr noalias noundef %1)
// CHECK: call void {{%.*}}(
// CHECK: [[DEVICE_CAP:%.+]] = getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 2
// CHECK: [[DEV:%.+]] = load i32, ptr [[DEVICE_CAP]],
// CHECK: [[DEVICE:%.+]] = sext i32 [[DEV]] to i64
// CHECK: [[RET:%.+]] = call i32 @__tgt_target_kernel(ptr @{{.+}}, i64 [[DEVICE]], i32 1, i32 0, ptr @.{{.+}}.region_id, ptr %{{.+}})
// CHECK: [[ERROR:%.+]] = icmp ne i32 [[RET]], 0
// CHECK-NEXT: br i1 [[ERROR]], label %[[FAIL:[^,]+]], label %[[END:[^,]+]]
// CHECK: [[FAIL]]
// CHECK: [[BP0:%.+]] = load ptr, ptr %
// CHECK: [[BP1_I32:%.+]] = load i32, ptr @
// CHECK-64: store i32 [[BP1_I32]], ptr [[BP1_PTR:%[^,]+]],
// CHECK-32: store i32 [[BP1_I32]], ptr [[BP1_PTR:%[^,]+]],
// CHECK: [[BP1:%.+]] = load i[[SZ]], ptr [[BP1_PTR]],
// CHECK: call void [[HVT1]](ptr [[BP0]], i[[SZ]] [[BP1]])
// CHECK-NEXT: br label %[[END]]
// CHECK: [[END]]
// CHECK: ret i32 0
// CHECK: define internal{{.*}} i32 [[TASK_ENTRY1__]](i32{{.*}}, ptr noalias noundef %1)
// CHECK: call void {{%.*}}(
// CHECK: [[DEVICE_CAP:%.+]] = getelementptr inbounds %{{.+}}, ptr %{{.+}}, i32 0, i32 2
// CHECK: [[BP0:%.+]] = load ptr, ptr %
// CHECK: [[BP1_I32:%.+]] = load i32, ptr @
// CHECK-64: store i32 [[BP1_I32]], ptr [[BP1_PTR:%[^,]+]],
// CHECK-32: store i32 [[BP1_I32]], ptr [[BP1_PTR:%[^,]+]],
// CHECK: [[BP1:%.+]] = load i[[SZ]], ptr [[BP1_PTR]],
// CHECK: call void [[HVT1]](ptr [[BP0]], i[[SZ]] [[BP1]])
// CHECK: ret i32 0
// CHECK: define internal void [[HVT2:@.+]](i[[SZ]] noundef %{{.+}})
// Create stack storage and store argument in there.
// CHECK: [[AA_ADDR:%.+]] = alloca i[[SZ]], align
// CHECK: store i[[SZ]] %{{.+}}, ptr [[AA_ADDR]], align
// CHECK-64: load i32, ptr [[AA_ADDR]], align
// CHECK-32: load i32, ptr [[AA_ADDR]], align
// CHECK: define internal{{.*}} i32 [[TASK_ENTRY2]](i32{{.*}}, ptr noalias noundef %1)
// CHECK: call void {{%.*}}(
// CHECK: [[BP1_I32:%.+]] = load i32, ptr %
// CHECK-64: store i32 [[BP1_I32]], ptr [[BP1_PTR:%[^,]+]],
// CHECK-32: store i32 [[BP1_I32]], ptr [[BP1_PTR:%[^,]+]],
// CHECK: [[BP1:%.+]] = load i[[SZ]], ptr [[BP1_PTR]],
// CHECK: call void [[HVT2]](i[[SZ]] [[BP1]])
// CHECK: ret i32 0
#endif
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