maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/clang/test/CodeGenCXX/eh.cpp

220 lines
7.2 KiB
C++
Raw Normal View History

Call PerformCopyInitialization to properly initialize the exception temporary in a throw expression. Use EmitAnyExprToMem to emit the throw expression, which magically elides the final copy-constructor call (which raises a new strict-compliance bug, but baby steps). Give __cxa_throw a destructor pointer if the exception type has a non-trivial destructor. llvm-svn: 102039
2010-04-22 09:10:34 +08:00
// RUN: %clang_cc1 -fexceptions -triple x86_64-apple-darwin -std=c++0x -emit-llvm %s -o %t.ll
Add testcases for recent checkins. llvm-svn: 89469
2009-11-21 02:51:28 +08:00
// RUN: FileCheck --input-file=%t.ll %s
struct test1_D {
double d;
} d1;
void test1() {
throw d1;
}
Call PerformCopyInitialization to properly initialize the exception temporary in a throw expression. Use EmitAnyExprToMem to emit the throw expression, which magically elides the final copy-constructor call (which raises a new strict-compliance bug, but baby steps). Give __cxa_throw a destructor pointer if the exception type has a non-trivial destructor. llvm-svn: 102039
2010-04-22 09:10:34 +08:00
// CHECK: define void @_Z5test1v()
// CHECK: [[FREEVAR:%.*]] = alloca i1
// CHECK-NEXT: [[EXNOBJVAR:%.*]] = alloca i8*
// CHECK-NEXT: store i1 false, i1* [[FREEVAR]]
// CHECK-NEXT: [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 8)
// CHECK-NEXT: store i8* [[EXNOBJ]], i8** [[EXNOBJVAR]]
// CHECK-NEXT: store i1 true, i1* [[FREEVAR]]
// CHECK-NEXT: [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[DSTAR:%[^*]*\*]]
// CHECK-NEXT: [[EXN2:%.*]] = bitcast [[DSTAR]] [[EXN]] to i8*
// CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* [[EXN2]], i8* bitcast ([[DSTAR]] @d1 to i8*), i64 8, i32 8, i1 false)
// CHECK-NEXT: store i1 false, i1* [[FREEVAR]]
// CHECK-NEXT: call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast (%0* @_ZTI7test1_D to i8*), i8* null) noreturn
Add testcases for recent checkins. llvm-svn: 89469
2009-11-21 02:51:28 +08:00
// CHECK-NEXT: unreachable
struct test2_D {
test2_D(const test2_D&o);
test2_D();
virtual void bar() { }
int i; int j;
} d2;
void test2() {
throw d2;
}
Call PerformCopyInitialization to properly initialize the exception temporary in a throw expression. Use EmitAnyExprToMem to emit the throw expression, which magically elides the final copy-constructor call (which raises a new strict-compliance bug, but baby steps). Give __cxa_throw a destructor pointer if the exception type has a non-trivial destructor. llvm-svn: 102039
2010-04-22 09:10:34 +08:00
// CHECK: define void @_Z5test2v()
// CHECK: [[FREEVAR:%.*]] = alloca i1
// CHECK-NEXT: [[EXNOBJVAR:%.*]] = alloca i8*
Validated by nightly-test runs on x86 and x86-64 darwin, including after self-host. Hopefully these results hold up on different platforms. I tried to keep the GNU ObjC runtime happy, but it's hard for me to test. Reimplement how clang generates IR for exceptions. Instead of creating new invoke destinations which sequentially chain to the previous destination, push a more semantic representation of *why* we need the cleanup/catch/filter behavior, then collect that information into a single landing pad upon request. Also reorganizes how normal cleanups (i.e. cleanups triggered by non-exceptional control flow) are generated, since it's actually fairly closely tied in with the former. Remove the need to track which cleanup scope a block is associated with. Document a lot of previously poorly-understood (by me, at least) behavior. The new framework implements the Horrible Hack (tm), which requires every landing pad to have a catch-all so that inlining will work. Clang no longer requires the Horrible Hack just to make exceptions flow correctly within a function, however. The HH is an unfortunate requirement of LLVM's EH IR. llvm-svn: 107631
2010-07-06 09:34:17 +08:00
// CHECK-NEXT: [[EXNSLOTVAR:%.*]] = alloca i8*
Call PerformCopyInitialization to properly initialize the exception temporary in a throw expression. Use EmitAnyExprToMem to emit the throw expression, which magically elides the final copy-constructor call (which raises a new strict-compliance bug, but baby steps). Give __cxa_throw a destructor pointer if the exception type has a non-trivial destructor. llvm-svn: 102039
2010-04-22 09:10:34 +08:00
// CHECK-NEXT: store i1 false, i1* [[FREEVAR]]
// CHECK-NEXT: [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 16)
// CHECK-NEXT: store i8* [[EXNOBJ]], i8** [[EXNOBJVAR]]
// CHECK-NEXT: store i1 true, i1* [[FREEVAR]]
// CHECK-NEXT: [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[DSTAR:%[^*]*\*]]
// CHECK-NEXT: invoke void @_ZN7test2_DC1ERKS_([[DSTAR]] [[EXN]], [[DSTAR]] @d2)
// CHECK-NEXT: to label %[[CONT:.*]] unwind label %{{.*}}
Neuter this testcase a little. The way LLVM writes labels for anonymous blocks makes it impossible to check labels. llvm-svn: 102048
2010-04-22 11:27:09 +08:00
// : [[CONT]]: (can't check this in Release-Asserts builds)
// CHECK: store i1 false, i1* [[FREEVAR]]
Call PerformCopyInitialization to properly initialize the exception temporary in a throw expression. Use EmitAnyExprToMem to emit the throw expression, which magically elides the final copy-constructor call (which raises a new strict-compliance bug, but baby steps). Give __cxa_throw a destructor pointer if the exception type has a non-trivial destructor. llvm-svn: 102039
2010-04-22 09:10:34 +08:00
// CHECK-NEXT: call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast (%{{.*}}* @_ZTI7test2_D to i8*), i8* null) noreturn
Add testcases for recent checkins. llvm-svn: 89469
2009-11-21 02:51:28 +08:00
// CHECK-NEXT: unreachable
struct test3_D {
test3_D() { }
test3_D(volatile test3_D&o);
virtual void bar();
};
void test3() {
throw (volatile test3_D *)0;
}
Call PerformCopyInitialization to properly initialize the exception temporary in a throw expression. Use EmitAnyExprToMem to emit the throw expression, which magically elides the final copy-constructor call (which raises a new strict-compliance bug, but baby steps). Give __cxa_throw a destructor pointer if the exception type has a non-trivial destructor. llvm-svn: 102039
2010-04-22 09:10:34 +08:00
// CHECK: define void @_Z5test3v()
// CHECK: [[FREEVAR:%.*]] = alloca i1
// CHECK-NEXT: [[EXNOBJVAR:%.*]] = alloca i8*
// CHECK-NEXT: store i1 false, i1* [[FREEVAR]]
// CHECK-NEXT: [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 8)
// CHECK-NEXT: store i8* [[EXNOBJ]], i8** [[EXNOBJVAR]]
// CHECK-NEXT: store i1 true, i1* [[FREEVAR]]
// CHECK-NEXT: [[EXN:%.*]] = bitcast i8* [[EXNOBJ]] to [[DSS:%[^*]*\*]]*
// CHECK-NEXT: store [[DSS]] null, [[DSS]]* [[EXN]]
// CHECK-NEXT: store i1 false, i1* [[FREEVAR]]
// CHECK-NEXT: call void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast (%1* @_ZTIPV7test3_D to i8*), i8* null) noreturn
// CHECK-NEXT: unreachable
Add testcases for recent checkins. llvm-svn: 89469
2009-11-21 02:51:28 +08:00
void test4() {
throw;
}
Call PerformCopyInitialization to properly initialize the exception temporary in a throw expression. Use EmitAnyExprToMem to emit the throw expression, which magically elides the final copy-constructor call (which raises a new strict-compliance bug, but baby steps). Give __cxa_throw a destructor pointer if the exception type has a non-trivial destructor. llvm-svn: 102039
2010-04-22 09:10:34 +08:00
// CHECK: define void @_Z5test4v()
Fix Release-Asserts. llvm-svn: 93353
2010-01-14 05:23:04 +08:00
// CHECK: call void @__cxa_rethrow() noreturn
Add testcases for recent checkins. llvm-svn: 89469
2009-11-21 02:51:28 +08:00
// CHECK-NEXT: unreachable
Call PerformCopyInitialization to properly initialize the exception temporary in a throw expression. Use EmitAnyExprToMem to emit the throw expression, which magically elides the final copy-constructor call (which raises a new strict-compliance bug, but baby steps). Give __cxa_throw a destructor pointer if the exception type has a non-trivial destructor. llvm-svn: 102039
2010-04-22 09:10:34 +08:00
// rdar://problem/7696549
namespace test5 {
struct A {
A();
A(const A&);
~A();
};
void test() {
try { throw A(); } catch (A &x) {}
}
// CHECK: define void @_ZN5test54testEv()
// CHECK: [[EXNOBJ:%.*]] = call i8* @__cxa_allocate_exception(i64 1)
// CHECK: [[EXNCAST:%.*]] = bitcast i8* [[EXNOBJ]] to [[A:%[^*]*]]*
// CHECK-NEXT: invoke void @_ZN5test51AC1Ev([[A]]* [[EXNCAST]])
// CHECK: invoke void @__cxa_throw(i8* [[EXNOBJ]], i8* bitcast ({{%.*}}* @_ZTIN5test51AE to i8*), i8* bitcast (void ([[A]]*)* @_ZN5test51AD1Ev to i8*)) noreturn
// CHECK-NEXT: to label {{%.*}} unwind label %[[HANDLER:[^ ]*]]
Neuter this testcase a little. The way LLVM writes labels for anonymous blocks makes it impossible to check labels. llvm-svn: 102048
2010-04-22 11:27:09 +08:00
// : [[HANDLER]]: (can't check this in Release-Asserts builds)
Call PerformCopyInitialization to properly initialize the exception temporary in a throw expression. Use EmitAnyExprToMem to emit the throw expression, which magically elides the final copy-constructor call (which raises a new strict-compliance bug, but baby steps). Give __cxa_throw a destructor pointer if the exception type has a non-trivial destructor. llvm-svn: 102039
2010-04-22 09:10:34 +08:00
// CHECK: {{%.*}} = call i32 @llvm.eh.typeid.for(i8* bitcast ({{%.*}}* @_ZTIN5test51AE to i8*))
}
Validated by nightly-test runs on x86 and x86-64 darwin, including after self-host. Hopefully these results hold up on different platforms. I tried to keep the GNU ObjC runtime happy, but it's hard for me to test. Reimplement how clang generates IR for exceptions. Instead of creating new invoke destinations which sequentially chain to the previous destination, push a more semantic representation of *why* we need the cleanup/catch/filter behavior, then collect that information into a single landing pad upon request. Also reorganizes how normal cleanups (i.e. cleanups triggered by non-exceptional control flow) are generated, since it's actually fairly closely tied in with the former. Remove the need to track which cleanup scope a block is associated with. Document a lot of previously poorly-understood (by me, at least) behavior. The new framework implements the Horrible Hack (tm), which requires every landing pad to have a catch-all so that inlining will work. Clang no longer requires the Horrible Hack just to make exceptions flow correctly within a function, however. The HH is an unfortunate requirement of LLVM's EH IR. llvm-svn: 107631
2010-07-06 09:34:17 +08:00
namespace test6 {
template <class T> struct allocator {
~allocator() throw() { }
};
void foo() {
allocator<int> a;
}
}
// PR7127
namespace test7 {
// CHECK: define i32 @_ZN5test73fooEv()
int foo() {
// CHECK: [[FREEEXNOBJ:%.*]] = alloca i1
// CHECK-NEXT: [[EXNALLOCVAR:%.*]] = alloca i8*
// CHECK-NEXT: [[CAUGHTEXNVAR:%.*]] = alloca i8*
// CHECK-NEXT: [[INTCATCHVAR:%.*]] = alloca i32
// CHECK-NEXT: store i1 false, i1* [[FREEEXNOBJ]]
try {
try {
// CHECK-NEXT: [[EXNALLOC:%.*]] = call i8* @__cxa_allocate_exception
// CHECK-NEXT: store i8* [[EXNALLOC]], i8** [[EXNALLOCVAR]]
// CHECK-NEXT: store i1 true, i1* [[FREEEXNOBJ]]
// CHECK-NEXT: bitcast i8* [[EXNALLOC]] to i32*
// CHECK-NEXT: store i32 1, i32*
// CHECK-NEXT: store i1 false, i1* [[FREEEXNOBJ]]
// CHECK-NEXT: invoke void @__cxa_throw(i8* [[EXNALLOC]], i8* bitcast (i8** @_ZTIi to i8*), i8* null
throw 1;
}
// CHECK: [[CAUGHTEXN:%.*]] = call i8* @llvm.eh.exception()
// CHECK-NEXT: store i8* [[CAUGHTEXN]], i8** [[CAUGHTEXNVAR]]
// CHECK-NEXT: call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* [[CAUGHTEXN]], i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* bitcast (i8** @_ZTIi to i8*), i8* null)
// CHECK-NEXT: call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
// CHECK-NEXT: icmp eq
// CHECK-NEXT: br i1
// CHECK: load i8** [[CAUGHTEXNVAR]]
// CHECK-NEXT: call i8* @__cxa_begin_catch
// CHECK: invoke void @__cxa_rethrow
catch (int) {
throw;
}
}
// CHECK: [[CAUGHTEXN:%.*]] = call i8* @llvm.eh.exception()
// CHECK-NEXT: store i8* [[CAUGHTEXN]], i8** [[CAUGHTEXNVAR]]
// CHECK-NEXT: call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* [[CAUGHTEXN]], i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* null)
// CHECK-NEXT: call void @__cxa_end_catch()
// CHECK-NEXT: br label
// CHECK: load i8** [[CAUGHTEXNVAR]]
// CHECK-NEXT: call i8* @__cxa_begin_catch
// CHECK-NEXT: call void @__cxa_end_catch
catch (...) {
}
// CHECK: ret i32 0
return 0;
}
}
// Ordering of destructors in a catch handler.
namespace test8 {
struct A { A(const A&); ~A(); };
void bar();
// CHECK: define void @_ZN5test83fooEv()
void foo() {
try {
// CHECK: invoke void @_ZN5test83barEv()
bar();
} catch (A a) {
// CHECK: call i8* @__cxa_get_exception_ptr
// CHECK-NEXT: bitcast
// CHECK-NEXT: invoke void @_ZN5test81AC1ERKS0_(
// CHECK: call i8* @__cxa_begin_catch
// CHECK-NEXT: invoke void @_ZN5test81AD1Ev(
// CHECK: call void @__cxa_end_catch()
// CHECK-NEXT: load
// CHECK-NEXT: switch
// CHECK: ret void
}
}
}
Teach function-try-blocks on constructors and destructors to implicitly rethrow. Fixes rdar://problem/7696603 llvm-svn: 107757
2010-07-07 14:56:46 +08:00
// Constructor function-try-block must rethrow on fallthrough.
// rdar://problem/7696603
namespace test9 {
void opaque();
struct A { A(); };
// CHECK: define void @_ZN5test91AC1Ev
// CHECK: call void @_ZN5test91AC2Ev
// CHECK-NEXT: ret void
// CHECK: define void @_ZN5test91AC2Ev(
A::A() try {
// CHECK: invoke void @_ZN5test96opaqueEv()
opaque();
} catch (int x) {
// CHECK: call i8* @__cxa_begin_catch
// CHECK: invoke void @_ZN5test96opaqueEv()
// CHECK: invoke void @__cxa_rethrow()
opaque();
}
// landing pad from first call to invoke
// CHECK: call i8* @llvm.eh.exception
// CHECK: call i32 (i8*, i8*, ...)* @llvm.eh.selector(i8* {{.*}}, i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*), i8* bitcast (i8** @_ZTIi to i8*), i8* null)
}