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llvm-project/clang/test/CodeGenCXX/exceptions-seh.cpp

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Re-land r228258 and make clang-cl's /EHs- disable -fexceptions again After r228258, Clang started emitting C++ EH IR that LLVM wasn't ready to deal with, even when exceptions were disabled with /EHs-. This time, make /EHs- turn off -fexceptions while still emitting exceptional constructs in functions using __try. Since Sema rejects C++ exception handling constructs before CodeGen, landingpads should only appear in such functions as the result of a __try. llvm-svn: 228329
2015-02-06 02:56:03 +08:00
// RUN: %clang_cc1 -std=c++11 -fblocks -fms-extensions %s -triple=x86_64-windows-msvc -emit-llvm \
// RUN: -o - -mconstructor-aliases -fcxx-exceptions -fexceptions | \
// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CXXEH
// RUN: %clang_cc1 -std=c++11 -fblocks -fms-extensions %s -triple=x86_64-windows-msvc -emit-llvm \
Emit landing pads for SEH even if nounwind is present Disabling exceptions applies nounwind to lots of functions. SEH catches asynch exceptions, so emit the landing pad anyway. llvm-svn: 228769
2015-02-11 08:00:21 +08:00
// RUN: -o - -mconstructor-aliases -O1 -disable-llvm-optzns | \
Re-land r228258 and make clang-cl's /EHs- disable -fexceptions again After r228258, Clang started emitting C++ EH IR that LLVM wasn't ready to deal with, even when exceptions were disabled with /EHs-. This time, make /EHs- turn off -fexceptions while still emitting exceptional constructs in functions using __try. Since Sema rejects C++ exception handling constructs before CodeGen, landingpads should only appear in such functions as the result of a __try. llvm-svn: 228329
2015-02-06 02:56:03 +08:00
// RUN: FileCheck %s --check-prefix=CHECK --check-prefix=NOCXX
extern "C" void might_throw();
struct HasCleanup {
HasCleanup();
~HasCleanup();
int padding;
};
extern "C" void use_cxx() {
HasCleanup x;
might_throw();
}
// Make sure we use __CxxFrameHandler3 for C++ EH.
// CXXEH-LABEL: define void @use_cxx()
// CXXEH: call %struct.HasCleanup* @"\01??0HasCleanup@@QEAA@XZ"(%struct.HasCleanup* %{{.*}})
// CXXEH: invoke void @might_throw()
// CXXEH: to label %[[cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// CXXEH: [[cont]]
// CXXEH: call void @"\01??1HasCleanup@@QEAA@XZ"(%struct.HasCleanup* %{{.*}})
// CXXEH: ret void
//
// CXXEH: [[lpad]]
// CXXEH: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
// CXXEH-NEXT: cleanup
// CXXEH: call void @"\01??1HasCleanup@@QEAA@XZ"(%struct.HasCleanup* %{{.*}})
// CXXEH: br label %[[resume:[^ ]*]]
//
// CXXEH: [[resume]]
// CXXEH: resume
// NOCXX-LABEL: define void @use_cxx()
// NOCXX-NOT: invoke
// NOCXX: call %struct.HasCleanup* @"\01??0HasCleanup@@QEAA@XZ"(%struct.HasCleanup* %{{.*}})
// NOCXX-NOT: invoke
// NOCXX: call void @might_throw()
// NOCXX-NOT: invoke
// NOCXX: call void @"\01??1HasCleanup@@QEAA@XZ"(%struct.HasCleanup* %{{.*}})
// NOCXX-NOT: invoke
// NOCXX: ret void
extern "C" void use_seh() {
__try {
might_throw();
} __except(1) {
}
}
// Make sure we use __C_specific_handler for SEH.
// CHECK-LABEL: define void @use_seh()
Add the 'noinline' attribute to call sites within __try bodies LLVM doesn't support non-call exceptions, so inlining makes it harder to catch such asynchronous exceptions. llvm-svn: 228876
2015-02-12 05:40:48 +08:00
// CHECK: invoke void @might_throw() #[[NOINLINE:[0-9]+]]
Re-land r228258 and make clang-cl's /EHs- disable -fexceptions again After r228258, Clang started emitting C++ EH IR that LLVM wasn't ready to deal with, even when exceptions were disabled with /EHs-. This time, make /EHs- turn off -fexceptions while still emitting exceptional constructs in functions using __try. Since Sema rejects C++ exception handling constructs before CodeGen, landingpads should only appear in such functions as the result of a __try. llvm-svn: 228329
2015-02-06 02:56:03 +08:00
// CHECK: to label %[[cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// CHECK: [[cont]]
// CHECK: br label %[[ret:[^ ]*]]
//
// CHECK: [[lpad]]
// CHECK: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
// CHECK-NEXT: catch i8*
//
// CHECK: br label %[[ret]]
//
// CHECK: [[ret]]
// CHECK: ret void
void use_seh_in_lambda() {
([]() {
__try {
might_throw();
} __except(1) {
}
})();
HasCleanup x;
might_throw();
}
// CXXEH-LABEL: define void @"\01?use_seh_in_lambda@@YAXXZ"()
// CXXEH: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
// NOCXX-LABEL: define void @"\01?use_seh_in_lambda@@YAXXZ"()
// NOCXX-NOT: invoke
// NOCXX: ret void
// CHECK-LABEL: define internal void @"\01??R<lambda_0>@?use_seh_in_lambda@@YAXXZ@QEBAXXZ"(%class.anon* %this)
Add the 'noinline' attribute to call sites within __try bodies LLVM doesn't support non-call exceptions, so inlining makes it harder to catch such asynchronous exceptions. llvm-svn: 228876
2015-02-12 05:40:48 +08:00
// CHECK: invoke void @might_throw() #[[NOINLINE]]
Re-land r228258 and make clang-cl's /EHs- disable -fexceptions again After r228258, Clang started emitting C++ EH IR that LLVM wasn't ready to deal with, even when exceptions were disabled with /EHs-. This time, make /EHs- turn off -fexceptions while still emitting exceptional constructs in functions using __try. Since Sema rejects C++ exception handling constructs before CodeGen, landingpads should only appear in such functions as the result of a __try. llvm-svn: 228329
2015-02-06 02:56:03 +08:00
// CHECK: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
Add the 'noinline' attribute to call sites within __try bodies LLVM doesn't support non-call exceptions, so inlining makes it harder to catch such asynchronous exceptions. llvm-svn: 228876
2015-02-12 05:40:48 +08:00
// CHECK: attributes #[[NOINLINE]] = { {{.*noinline.*}} }