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clang-p2996/clang/test/CodeGenCXX/exceptions.cpp
John McCall 8e4c74bb7c Simplify EH control flow by observing that EH scopes form a simple 
hierarchy of delegation, and that EH selector values are meaningful
function-wide (good thing, too, or inlining wouldn't work).
2,3d
1a
hierarchy of delegation and that EH selector values have the same
meaning everywhere in the function instead of being meaningful only
in the context of a specific selector.

This removes the need for routing edges through EH cleanups,
since a cleanup simply always branches to its enclosing scope.

llvm-svn: 137293
2011-08-11 02:22:43 +00:00

393 lines
14 KiB
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// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - -fcxx-exceptions -fexceptions | FileCheck %s
typedef typeof(sizeof(0)) size_t;
// This just shouldn't crash.
namespace test0 {
struct allocator {
allocator();
allocator(const allocator&);
~allocator();
};
void f();
void g(bool b, bool c) {
if (b) {
if (!c)
throw allocator();
return;
}
f();
}
}
namespace test1 {
struct A { A(int); A(int, int); ~A(); void *p; };
A *a() {
// CHECK: define [[A:%.*]]* @_ZN5test11aEv()
// CHECK: [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
// CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
// CHECK-NEXT: invoke void @_ZN5test11AC1Ei([[A]]* [[CAST]], i32 5)
// CHECK: ret [[A]]* [[CAST]]
// CHECK: call void @_ZdlPv(i8* [[NEW]])
return new A(5);
}
A *b() {
// CHECK: define [[A:%.*]]* @_ZN5test11bEv()
// CHECK: [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
// CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
// CHECK-NEXT: [[FOO:%.*]] = invoke i32 @_ZN5test13fooEv()
// CHECK: invoke void @_ZN5test11AC1Ei([[A]]* [[CAST]], i32 [[FOO]])
// CHECK: ret [[A]]* [[CAST]]
// CHECK: call void @_ZdlPv(i8* [[NEW]])
extern int foo();
return new A(foo());
}
struct B { B(); ~B(); operator int(); int x; };
B makeB();
A *c() {
// CHECK: define [[A:%.*]]* @_ZN5test11cEv()
// CHECK: [[ACTIVE:%.*]] = alloca i1
// CHECK-NEXT: store i1 true, i1* [[ACTIVE]]
// CHECK-NEXT: [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
// CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
// CHECK-NEXT: invoke void @_ZN5test11BC1Ev([[B:%.*]]* [[T0:%.*]])
// CHECK: [[T1:%.*]] = getelementptr inbounds [[B]]* [[T0]], i32 0, i32 0
// CHECK-NEXT: [[T2:%.*]] = load i32* [[T1]], align 4
// CHECK-NEXT: invoke void @_ZN5test11AC1Ei([[A]]* [[CAST]], i32 [[T2]])
// CHECK: store i1 false, i1* [[ACTIVE]]
// CHECK-NEXT: invoke void @_ZN5test11BD1Ev([[B]]* [[T0]])
// CHECK: ret [[A]]* [[CAST]]
// CHECK: [[ISACTIVE:%.*]] = load i1* [[ACTIVE]]
// CHECK-NEXT: br i1 [[ISACTIVE]]
// CHECK: call void @_ZdlPv(i8* [[NEW]])
return new A(B().x);
}
A *d() {
// CHECK: define [[A:%.*]]* @_ZN5test11dEv()
// CHECK: [[ACTIVE:%.*]] = alloca i1
// CHECK-NEXT: store i1 true, i1* [[ACTIVE]]
// CHECK-NEXT: [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
// CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
// CHECK-NEXT: invoke void @_ZN5test11BC1Ev([[B:%.*]]* [[T0:%.*]])
// CHECK: [[T1:%.*]] = invoke i32 @_ZN5test11BcviEv([[B]]* [[T0]])
// CHECK: invoke void @_ZN5test11AC1Ei([[A]]* [[CAST]], i32 [[T1]])
// CHECK: store i1 false, i1* [[ACTIVE]]
// CHECK-NEXT: invoke void @_ZN5test11BD1Ev([[B]]* [[T0]])
// CHECK: ret [[A]]* [[CAST]]
// CHECK: [[ISACTIVE:%.*]] = load i1* [[ACTIVE]]
// CHECK-NEXT: br i1 [[ISACTIVE]]
// CHECK: call void @_ZdlPv(i8* [[NEW]])
return new A(B());
}
A *e() {
// CHECK: define [[A:%.*]]* @_ZN5test11eEv()
// CHECK: [[ACTIVE:%.*]] = alloca i1
// CHECK-NEXT: store i1 true, i1* [[ACTIVE]]
// CHECK-NEXT: [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
// CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
// CHECK-NEXT: invoke void @_ZN5test11BC1Ev([[B:%.*]]* [[T0:%.*]])
// CHECK: [[T1:%.*]] = invoke i32 @_ZN5test11BcviEv([[B]]* [[T0]])
// CHECK: invoke void @_ZN5test11BC1Ev([[B]]* [[T2:%.*]])
// CHECK: [[T3:%.*]] = invoke i32 @_ZN5test11BcviEv([[B]]* [[T2]])
// CHECK: invoke void @_ZN5test11AC1Eii([[A]]* [[CAST]], i32 [[T1]], i32 [[T3]])
// CHECK: store i1 false, i1* [[ACTIVE]]
// CHECK-NEXT: invoke void @_ZN5test11BD1Ev([[B]]* [[T2]])
// CHECK: invoke void @_ZN5test11BD1Ev([[B]]* [[T0]])
// CHECK: ret [[A]]* [[CAST]]
// CHECK: [[ISACTIVE:%.*]] = load i1* [[ACTIVE]]
// CHECK-NEXT: br i1 [[ISACTIVE]]
// CHECK: call void @_ZdlPv(i8* [[NEW]])
return new A(B(), B());
}
A *f() {
return new A(makeB().x);
}
A *g() {
return new A(makeB());
}
A *h() {
return new A(makeB(), makeB());
}
A *i() {
// CHECK: define [[A:%.*]]* @_ZN5test11iEv()
// CHECK: [[X:%.*]] = alloca [[A]]*, align 8
// CHECK: [[ACTIVE:%.*]] = alloca i1
// CHECK: store i1 true, i1* [[ACTIVE]]
// CHECK-NEXT: [[NEW:%.*]] = call noalias i8* @_Znwm(i64 8)
// CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
// CHECK-NEXT: invoke void @_ZN5test15makeBEv([[B:%.*]]* sret [[T0:%.*]])
// CHECK: [[T1:%.*]] = invoke i32 @_ZN5test11BcviEv([[B]]* [[T0]])
// CHECK: invoke void @_ZN5test11AC1Ei([[A]]* [[CAST]], i32 [[T1]])
// CHECK: store i1 false, i1* [[ACTIVE]]
// CHECK-NEXT: store [[A]]* [[CAST]], [[A]]** [[X]], align 8
// CHECK: invoke void @_ZN5test15makeBEv([[B:%.*]]* sret [[T2:%.*]])
// CHECK: [[RET:%.*]] = load [[A]]** [[X]], align 8
// CHECK: invoke void @_ZN5test11BD1Ev([[B]]* [[T2]])
// CHECK: invoke void @_ZN5test11BD1Ev([[B]]* [[T0]])
// CHECK: ret [[A]]* [[RET]]
// CHECK: [[ISACTIVE:%.*]] = load i1* [[ACTIVE]]
// CHECK-NEXT: br i1 [[ISACTIVE]]
// CHECK: call void @_ZdlPv(i8* [[NEW]])
A *x;
return (x = new A(makeB()), makeB(), x);
}
}
namespace test2 {
struct A {
A(int); A(int, int); ~A();
void *p;
void *operator new(size_t);
void operator delete(void*, size_t);
};
A *a() {
// CHECK: define [[A:%.*]]* @_ZN5test21aEv()
// CHECK: [[NEW:%.*]] = call i8* @_ZN5test21AnwEm(i64 8)
// CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
// CHECK-NEXT: invoke void @_ZN5test21AC1Ei([[A]]* [[CAST]], i32 5)
// CHECK: ret [[A]]* [[CAST]]
// CHECK: invoke void @_ZN5test21AdlEPvm(i8* [[NEW]], i64 8)
// CHECK: call void @_ZSt9terminatev()
return new A(5);
}
}
namespace test3 {
struct A {
A(int); A(int, int); A(const A&); ~A();
void *p;
void *operator new(size_t, void*, double);
void operator delete(void*, void*, double);
};
void *foo();
double bar();
A makeA(), *makeAPtr();
A *a() {
// CHECK: define [[A:%.*]]* @_ZN5test31aEv()
// CHECK: [[FOO:%.*]] = call i8* @_ZN5test33fooEv()
// CHECK: [[BAR:%.*]] = call double @_ZN5test33barEv()
// CHECK: [[NEW:%.*]] = call i8* @_ZN5test31AnwEmPvd(i64 8, i8* [[FOO]], double [[BAR]])
// CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
// CHECK-NEXT: invoke void @_ZN5test31AC1Ei([[A]]* [[CAST]], i32 5)
// CHECK: ret [[A]]* [[CAST]]
// CHECK: invoke void @_ZN5test31AdlEPvS1_d(i8* [[NEW]], i8* [[FOO]], double [[BAR]])
// CHECK: call void @_ZSt9terminatev()
return new(foo(),bar()) A(5);
}
// rdar://problem/8439196
A *b(bool cond) {
// CHECK: define [[A:%.*]]* @_ZN5test31bEb(i1 zeroext
// CHECK: [[SAVED0:%.*]] = alloca i8*
// CHECK-NEXT: [[SAVED1:%.*]] = alloca i8*
// CHECK-NEXT: [[CLEANUPACTIVE:%.*]] = alloca i1
// CHECK-NEXT: [[TMP:%.*]] = alloca [[A]], align 8
// CHECK: [[TMPACTIVE:%.*]] = alloca i1
// CHECK-NEXT: store i1 false, i1* [[CLEANUPACTIVE]]
// CHECK: [[COND:%.*]] = trunc i8 {{.*}} to i1
// CHECK-NEXT: store i1 false, i1* [[TMPACTIVE]]
// CHECK-NEXT: br i1 [[COND]]
return (cond ?
// CHECK: [[FOO:%.*]] = call i8* @_ZN5test33fooEv()
// CHECK-NEXT: [[NEW:%.*]] = call i8* @_ZN5test31AnwEmPvd(i64 8, i8* [[FOO]], double [[CONST:.*]])
// CHECK-NEXT: store i8* [[NEW]], i8** [[SAVED0]]
// CHECK-NEXT: store i8* [[FOO]], i8** [[SAVED1]]
// CHECK-NEXT: store i1 true, i1* [[CLEANUPACTIVE]]
// CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
// CHECK-NEXT: invoke void @_ZN5test35makeAEv([[A]]* sret [[TMP]])
// CHECK: store i1 true, i1* [[TMPACTIVE]]
// CHECK-NEXT: invoke void @_ZN5test31AC1ERKS0_([[A]]* [[CAST]], [[A]]* [[TMP]])
// CHECK: store i1 false, i1* [[CLEANUPACTIVE]]
// CHECK-NEXT: br label
// -> cond.end
new(foo(),10.0) A(makeA()) :
// CHECK: [[MAKE:%.*]] = invoke [[A]]* @_ZN5test38makeAPtrEv()
// CHECK: br label
// -> cond.end
makeAPtr());
// cond.end:
// CHECK: [[RESULT:%.*]] = phi [[A]]* {{.*}}[[CAST]]{{.*}}[[MAKE]]
// CHECK-NEXT: [[ISACTIVE:%.*]] = load i1* [[TMPACTIVE]]
// CHECK-NEXT: br i1 [[ISACTIVE]]
// CHECK: invoke void @_ZN5test31AD1Ev
// CHECK: ret [[A]]* [[RESULT]]
// in the EH path:
// CHECK: [[ISACTIVE:%.*]] = load i1* [[CLEANUPACTIVE]]
// CHECK-NEXT: br i1 [[ISACTIVE]]
// CHECK: [[V0:%.*]] = load i8** [[SAVED0]]
// CHECK-NEXT: [[V1:%.*]] = load i8** [[SAVED1]]
// CHECK-NEXT: invoke void @_ZN5test31AdlEPvS1_d(i8* [[V0]], i8* [[V1]], double [[CONST]])
}
}
namespace test4 {
struct A {
A(int); A(int, int); ~A();
void *p;
void *operator new(size_t, void*, void*);
void operator delete(void*, size_t, void*, void*); // not a match
};
A *a() {
// CHECK: define [[A:%.*]]* @_ZN5test41aEv()
// CHECK: [[FOO:%.*]] = call i8* @_ZN5test43fooEv()
// CHECK-NEXT: [[BAR:%.*]] = call i8* @_ZN5test43barEv()
// CHECK-NEXT: [[NEW:%.*]] = call i8* @_ZN5test41AnwEmPvS1_(i64 8, i8* [[FOO]], i8* [[BAR]])
// CHECK-NEXT: [[CAST:%.*]] = bitcast i8* [[NEW]] to [[A]]*
// CHECK-NEXT: call void @_ZN5test41AC1Ei([[A]]* [[CAST]], i32 5)
// CHECK-NEXT: ret [[A]]* [[CAST]]
extern void *foo(), *bar();
return new(foo(),bar()) A(5);
}
}
// PR7908
namespace test5 {
struct T { T(); ~T(); };
struct A {
A(const A &x, const T &t = T());
~A();
};
void foo();
// CHECK: define void @_ZN5test54testEv()
// CHECK: [[EXNSLOT:%.*]] = alloca i8*
// CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
// CHECK-NEXT: [[A:%.*]] = alloca [[A_T:%.*]], align 1
// CHECK-NEXT: [[T:%.*]] = alloca [[T_T:%.*]], align 1
// CHECK-NEXT: invoke void @_ZN5test53fooEv()
// CHECK: [[EXN:%.*]] = load i8** [[EXNSLOT]]
// CHECK-NEXT: [[ADJ:%.*]] = call i8* @__cxa_get_exception_ptr(i8* [[EXN]])
// CHECK-NEXT: [[SRC:%.*]] = bitcast i8* [[ADJ]] to [[A_T]]*
// CHECK-NEXT: invoke void @_ZN5test51TC1Ev([[T_T]]* [[T]])
// CHECK: invoke void @_ZN5test51AC1ERKS0_RKNS_1TE([[A_T]]* [[A]], [[A_T]]* [[SRC]], [[T_T]]* [[T]])
// CHECK: invoke void @_ZN5test51TD1Ev([[T_T]]* [[T]])
// CHECK: call i8* @__cxa_begin_catch(i8* [[EXN]]) nounwind
// CHECK-NEXT: invoke void @_ZN5test51AD1Ev([[A_T]]* [[A]])
// CHECK: call void @__cxa_end_catch()
void test() {
try {
foo();
} catch (A a) {
}
}
}
// PR9303: invalid assert on this
namespace test6 {
bool cond();
void test() {
try {
lbl:
if (cond()) goto lbl;
} catch (...) {
}
}
}
// PR9298
namespace test7 {
struct A { A(); ~A(); };
struct B {
// The throw() operator means that a bad allocation is signalled
// with a null return, which means that the initializer is
// evaluated conditionally.
static void *operator new(size_t size) throw();
B(const A&, B*);
~B();
};
B *test() {
// CHECK: define [[B:%.*]]* @_ZN5test74testEv()
// CHECK: [[OUTER_NEW:%.*]] = alloca i1
// CHECK-NEXT: alloca [[A:%.*]],
// CHECK-NEXT: alloca i8*
// CHECK-NEXT: alloca i32
// CHECK-NEXT: [[OUTER_A:%.*]] = alloca i1
// CHECK-NEXT: alloca i8*
// CHECK-NEXT: [[INNER_NEW:%.*]] = alloca i1
// CHECK-NEXT: alloca [[A]]
// CHECK-NEXT: [[INNER_A:%.*]] = alloca i1
// These entry-block stores are to deactivate the delete cleanups.
// CHECK-NEXT: store i1 false, i1* [[INNER_NEW]]
// CHECK-NEXT: store i1 false, i1* [[OUTER_NEW]]
// Allocate the outer object.
// CHECK-NEXT: [[NEW:%.*]] = call i8* @_ZN5test71BnwEm(
// CHECK-NEXT: icmp eq i8* [[NEW]], null
// These stores, emitted before the outermost conditional branch,
// deactivate the temporary cleanups.
// CHECK-NEXT: store i1 false, i1* [[OUTER_A]]
// CHECK-NEXT: store i1 false, i1* [[INNER_A]]
// CHECK-NEXT: br i1
// We passed the first null check; activate that cleanup and continue.
// CHECK: store i1 true, i1* [[OUTER_NEW]]
// CHECK-NEXT: bitcast
// Create the first A temporary and activate that cleanup.
// CHECK-NEXT: invoke void @_ZN5test71AC1Ev(
// CHECK: store i1 true, i1* [[OUTER_A]]
// Allocate the inner object.
// CHECK-NEXT: [[NEW:%.*]] = call i8* @_ZN5test71BnwEm(
// CHECK-NEXT: icmp eq i8* [[NEW]], null
// CHECK-NEXT: br i1
// We passed the second null check; save that pointer, activate
// that cleanup, and continue.
// CHECK: store i8* [[NEW]]
// CHECK-NEXT: store i1 true, i1* [[INNER_NEW]]
// CHECK-NEXT: bitcast
// Build the second A temporary and activate that cleanup.
// CHECK-NEXT: invoke void @_ZN5test71AC1Ev(
// CHECK: store i1 true, i1* [[INNER_A]]
// Build the inner B object and deactivate the inner delete cleanup.
// CHECK-NEXT: invoke void @_ZN5test71BC1ERKNS_1AEPS0_(
// CHECK: store i1 false, i1* [[INNER_NEW]]
// CHECK: phi
// Build the outer B object and deactivate the outer delete cleanup.
// CHECK-NEXT: invoke void @_ZN5test71BC1ERKNS_1AEPS0_(
// CHECK: store i1 false, i1* [[OUTER_NEW]]
// CHECK: phi
// Destroy the inner A object.
// CHECK-NEXT: load i1* [[INNER_A]]
// CHECK-NEXT: br i1
// CHECK: invoke void @_ZN5test71AD1Ev(
// Destroy the outer A object.
// CHECK: load i1* [[OUTER_A]]
// CHECK-NEXT: br i1
// CHECK: invoke void @_ZN5test71AD1Ev(
return new B(A(), new B(A(), 0));
}
}
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