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llvm-project/clang/test/CodeGenCXX/arm.cpp
Bill Wendling f0724e8e06 Throw the switch to convert clang to the new exception handling model! 
This model uses the 'landingpad' instruction, which is pinned to the top of the
landing pad. (A landing pad is defined as the destination of the unwind branch
of an invoke instruction.) All of the information needed to generate the correct
exception handling metadata during code generation is encoded into the
landingpad instruction.

The new 'resume' instruction takes the place of the llvm.eh.resume intrinsic
call. It's lowered in much the same way as the intrinsic is.

llvm-svn: 140049
2011-09-19 20:31:14 +00:00

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// RUN: %clang_cc1 %s -triple=thumbv7-apple-darwin3.0.0-iphoneos -fno-use-cxa-atexit -target-abi apcs-gnu -emit-llvm -o - -fexceptions | FileCheck %s
// CHECK: @_ZZN5test74testEvE1x = internal global i32 0, align 4
// CHECK: @_ZGVZN5test74testEvE1x = internal global i32 0
// CHECK: @_ZZN5test84testEvE1x = internal global [[TEST8A:.*]] zeroinitializer, align 1
// CHECK: @_ZGVZN5test84testEvE1x = internal global i32 0
typedef typeof(sizeof(int)) size_t;
class foo {
public:
foo();
virtual ~foo();
};
class bar : public foo {
public:
bar();
};
// The global dtor needs the right calling conv with -fno-use-cxa-atexit
// rdar://7817590
// Checked at end of file.
bar baz;
// Destructors and constructors must return this.
namespace test1 {
void foo();
struct A {
A(int i) { foo(); }
~A() { foo(); }
void bar() { foo(); }
};
// CHECK: define void @_ZN5test14testEv()
void test() {
// CHECK: [[AV:%.*]] = alloca [[A:%.*]], align 1
// CHECK: call [[A]]* @_ZN5test11AC1Ei([[A]]* [[AV]], i32 10)
// CHECK: invoke void @_ZN5test11A3barEv([[A]]* [[AV]])
// CHECK: call [[A]]* @_ZN5test11AD1Ev([[A]]* [[AV]])
// CHECK: ret void
A a = 10;
a.bar();
}
// CHECK: define linkonce_odr [[A]]* @_ZN5test11AC1Ei([[A]]* %this, i32 %i) unnamed_addr
// CHECK: [[RET:%.*]] = alloca [[A]]*, align 4
// CHECK: [[THIS:%.*]] = alloca [[A]]*, align 4
// CHECK: store [[A]]* {{.*}}, [[A]]** [[THIS]]
// CHECK: [[THIS1:%.*]] = load [[A]]** [[THIS]]
// CHECK: store [[A]]* [[THIS1]], [[A]]** [[RET]]
// CHECK: call [[A]]* @_ZN5test11AC2Ei(
// CHECK: [[THIS2:%.*]] = load [[A]]** [[RET]]
// CHECK: ret [[A]]* [[THIS2]]
// CHECK: define linkonce_odr [[A]]* @_ZN5test11AD1Ev([[A]]* %this) unnamed_addr
// CHECK: [[RET:%.*]] = alloca [[A]]*, align 4
// CHECK: [[THIS:%.*]] = alloca [[A]]*, align 4
// CHECK: store [[A]]* {{.*}}, [[A]]** [[THIS]]
// CHECK: [[THIS1:%.*]] = load [[A]]** [[THIS]]
// CHECK: store [[A]]* [[THIS1]], [[A]]** [[RET]]
// CHECK: call [[A]]* @_ZN5test11AD2Ev(
// CHECK: [[THIS2:%.*]] = load [[A]]** [[RET]]
// CHECK: ret [[A]]* [[THIS2]]
}
// Awkward virtual cases.
namespace test2 {
void foo();
struct A {
int x;
A(int);
virtual ~A() { foo(); }
};
struct B {
int y;
int z;
B(int);
virtual ~B() { foo(); }
};
struct C : A, virtual B {
int q;
C(int i) : A(i), B(i) { foo(); }
~C() { foo(); }
};
void test() {
C c = 10;
}
// Tests at eof
}
namespace test3 {
struct A {
int x;
~A();
};
void a() {
// CHECK: define void @_ZN5test31aEv()
// CHECK: call noalias i8* @_Znam(i32 48)
// CHECK: store i32 4
// CHECK: store i32 10
A *x = new A[10];
}
void b(int n) {
// CHECK: define void @_ZN5test31bEi(
// CHECK: [[N:%.*]] = load i32*
// CHECK: @llvm.umul.with.overflow.i32(i32 [[N]], i32 4)
// CHECK: @llvm.uadd.with.overflow.i32(i32 {{.*}}, i32 8)
// CHECK: [[OR:%.*]] = or i1
// CHECK: [[SZ:%.*]] = select i1 [[OR]]
// CHECK: call noalias i8* @_Znam(i32 [[SZ]])
// CHECK: store i32 4
// CHECK: store i32 [[N]]
A *x = new A[n];
}
void c() {
// CHECK: define void @_ZN5test31cEv()
// CHECK: call noalias i8* @_Znam(i32 808)
// CHECK: store i32 4
// CHECK: store i32 200
A (*x)[20] = new A[10][20];
}
void d(int n) {
// CHECK: define void @_ZN5test31dEi(
// CHECK: [[N:%.*]] = load i32*
// CHECK: @llvm.umul.with.overflow.i32(i32 [[N]], i32 80)
// CHECK: [[NE:%.*]] = mul i32 [[N]], 20
// CHECK: @llvm.uadd.with.overflow.i32(i32 {{.*}}, i32 8)
// CHECK: [[SZ:%.*]] = select
// CHECK: call noalias i8* @_Znam(i32 [[SZ]])
// CHECK: store i32 4
// CHECK: store i32 [[NE]]
A (*x)[20] = new A[n][20];
}
void e(A *x) {
// CHECK: define void @_ZN5test31eEPNS_1AE(
// CHECK: icmp eq {{.*}}, null
// CHECK: getelementptr {{.*}}, i64 -8
// CHECK: getelementptr {{.*}}, i64 4
// CHECK: bitcast {{.*}} to i32*
// CHECK: load
// CHECK: invoke {{.*}} @_ZN5test31AD1Ev
// CHECK: call void @_ZdaPv
delete [] x;
}
void f(A (*x)[20]) {
// CHECK: define void @_ZN5test31fEPA20_NS_1AE(
// CHECK: icmp eq {{.*}}, null
// CHECK: getelementptr {{.*}}, i64 -8
// CHECK: getelementptr {{.*}}, i64 4
// CHECK: bitcast {{.*}} to i32*
// CHECK: load
// CHECK: invoke {{.*}} @_ZN5test31AD1Ev
// CHECK: call void @_ZdaPv
delete [] x;
}
}
namespace test4 {
struct A {
int x;
void operator delete[](void *, size_t sz);
};
void a() {
// CHECK: define void @_ZN5test41aEv()
// CHECK: call noalias i8* @_Znam(i32 48)
// CHECK: store i32 4
// CHECK: store i32 10
A *x = new A[10];
}
void b(int n) {
// CHECK: define void @_ZN5test41bEi(
// CHECK: [[N:%.*]] = load i32*
// CHECK: @llvm.umul.with.overflow.i32(i32 [[N]], i32 4)
// CHECK: @llvm.uadd.with.overflow.i32(i32 {{.*}}, i32 8)
// CHECK: [[SZ:%.*]] = select
// CHECK: call noalias i8* @_Znam(i32 [[SZ]])
// CHECK: store i32 4
// CHECK: store i32 [[N]]
A *x = new A[n];
}
void c() {
// CHECK: define void @_ZN5test41cEv()
// CHECK: call noalias i8* @_Znam(i32 808)
// CHECK: store i32 4
// CHECK: store i32 200
A (*x)[20] = new A[10][20];
}
void d(int n) {
// CHECK: define void @_ZN5test41dEi(
// CHECK: [[N:%.*]] = load i32*
// CHECK: @llvm.umul.with.overflow.i32(i32 [[N]], i32 80)
// CHECK: [[NE:%.*]] = mul i32 [[N]], 20
// CHECK: @llvm.uadd.with.overflow.i32(i32 {{.*}}, i32 8)
// CHECK: [[SZ:%.*]] = select
// CHECK: call noalias i8* @_Znam(i32 [[SZ]])
// CHECK: store i32 4
// CHECK: store i32 [[NE]]
A (*x)[20] = new A[n][20];
}
void e(A *x) {
// CHECK: define void @_ZN5test41eEPNS_1AE(
// CHECK: [[ALLOC:%.*]] = getelementptr inbounds {{.*}}, i64 -8
// CHECK: getelementptr inbounds {{.*}}, i64 4
// CHECK: bitcast
// CHECK: [[T0:%.*]] = load i32*
// CHECK: [[T1:%.*]] = mul i32 4, [[T0]]
// CHECK: [[T2:%.*]] = add i32 [[T1]], 8
// CHECK: call void @_ZN5test41AdaEPvm(i8* [[ALLOC]], i32 [[T2]])
delete [] x;
}
void f(A (*x)[20]) {
// CHECK: define void @_ZN5test41fEPA20_NS_1AE(
// CHECK: [[ALLOC:%.*]] = getelementptr inbounds {{.*}}, i64 -8
// CHECK: getelementptr inbounds {{.*}}, i64 4
// CHECK: bitcast
// CHECK: [[T0:%.*]] = load i32*
// CHECK: [[T1:%.*]] = mul i32 4, [[T0]]
// CHECK: [[T2:%.*]] = add i32 [[T1]], 8
// CHECK: call void @_ZN5test41AdaEPvm(i8* [[ALLOC]], i32 [[T2]])
delete [] x;
}
}
// <rdar://problem/8386802>: don't crash
namespace test5 {
struct A {
~A();
};
// CHECK: define void @_ZN5test54testEPNS_1AE
void test(A *a) {
// CHECK: [[PTR:%.*]] = alloca [[A:%.*]]*, align 4
// CHECK-NEXT: store [[A]]* {{.*}}, [[A]]** [[PTR]], align 4
// CHECK-NEXT: [[TMP:%.*]] = load [[A]]** [[PTR]], align 4
// CHECK-NEXT: call [[A]]* @_ZN5test51AD1Ev([[A]]* [[TMP]])
// CHECK-NEXT: ret void
a->~A();
}
}
namespace test6 {
struct A {
virtual ~A();
};
// CHECK: define void @_ZN5test64testEPNS_1AE
void test(A *a) {
// CHECK: [[AVAR:%.*]] = alloca [[A:%.*]]*, align 4
// CHECK-NEXT: store [[A]]* {{.*}}, [[A]]** [[AVAR]], align 4
// CHECK-NEXT: [[V:%.*]] = load [[A]]** [[AVAR]], align 4
// CHECK-NEXT: [[ISNULL:%.*]] = icmp eq [[A]]* [[V]], null
// CHECK-NEXT: br i1 [[ISNULL]]
// CHECK: [[T0:%.*]] = bitcast [[A]]* [[V]] to [[A]]* ([[A]]*)***
// CHECK-NEXT: [[T1:%.*]] = load [[A]]* ([[A]]*)*** [[T0]]
// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds [[A]]* ([[A]]*)** [[T1]], i64 1
// CHECK-NEXT: [[T3:%.*]] = load [[A]]* ([[A]]*)** [[T2]]
// CHECK-NEXT: call [[A]]* [[T3]]([[A]]* [[V]])
// CHECK-NEXT: br label
// CHECK: ret void
delete a;
}
}
namespace test7 {
int foo();
// Static and guard tested at top of file
// CHECK: define void @_ZN5test74testEv()
void test() {
// CHECK: [[T0:%.*]] = load i32* @_ZGVZN5test74testEvE1x
// CHECK-NEXT: [[T1:%.*]] = and i32 [[T0]], 1
// CHECK-NEXT: [[T2:%.*]] = icmp eq i32 [[T1]], 0
// CHECK-NEXT: br i1 [[T2]]
// -> fallthrough, end
// CHECK: [[T3:%.*]] = call i32 @__cxa_guard_acquire(i32* @_ZGVZN5test74testEvE1x)
// CHECK-NEXT: [[T4:%.*]] = icmp ne i32 [[T3]], 0
// CHECK-NEXT: br i1 [[T4]]
// -> fallthrough, end
// CHECK: [[INIT:%.*]] = invoke i32 @_ZN5test73fooEv()
// CHECK: store i32 [[INIT]], i32* @_ZZN5test74testEvE1x, align 4
// CHECK-NEXT: call void @__cxa_guard_release(i32* @_ZGVZN5test74testEvE1x)
// CHECK-NEXT: br label
// -> end
// end:
// CHECK: ret void
static int x = foo();
// CHECK: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
// CHECK-NEXT: cleanup
// CHECK: call void @__cxa_guard_abort(i32* @_ZGVZN5test74testEvE1x)
// CHECK: resume { i8*, i32 }
}
}
namespace test8 {
struct A {
A();
~A();
};
// Static and guard tested at top of file
// CHECK: define void @_ZN5test84testEv()
void test() {
// CHECK: [[T0:%.*]] = load i32* @_ZGVZN5test84testEvE1x
// CHECK-NEXT: [[T1:%.*]] = and i32 [[T0]], 1
// CHECK-NEXT: [[T2:%.*]] = icmp eq i32 [[T1]], 0
// CHECK-NEXT: br i1 [[T2]]
// -> fallthrough, end
// CHECK: [[T3:%.*]] = call i32 @__cxa_guard_acquire(i32* @_ZGVZN5test84testEvE1x)
// CHECK-NEXT: [[T4:%.*]] = icmp ne i32 [[T3]], 0
// CHECK-NEXT: br i1 [[T4]]
// -> fallthrough, end
// CHECK: [[INIT:%.*]] = invoke [[TEST8A]]* @_ZN5test81AC1Ev([[TEST8A]]* @_ZZN5test84testEvE1x)
// FIXME: Here we register a global destructor that
// unconditionally calls the destructor. That's what we've always
// done for -fno-use-cxa-atexit here, but that's really not
// semantically correct at all.
// CHECK: call void @__cxa_guard_release(i32* @_ZGVZN5test84testEvE1x)
// CHECK-NEXT: br label
// -> end
// end:
// CHECK: ret void
static A x;
// CHECK: landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
// CHECK-NEXT: cleanup
// CHECK: call void @__cxa_guard_abort(i32* @_ZGVZN5test84testEvE1x)
// CHECK: resume { i8*, i32 }
}
}
// CHECK: define linkonce_odr [[C:%.*]]* @_ZTv0_n12_N5test21CD1Ev(
// CHECK: call [[C]]* @_ZN5test21CD1Ev(
// CHECK: ret [[C]]* undef
// CHECK: define linkonce_odr void @_ZTv0_n12_N5test21CD0Ev(
// CHECK: call void @_ZN5test21CD0Ev(
// CHECK: ret void
// CHECK: @_GLOBAL__D_a()
// CHECK: call %class.bar* @_ZN3barD1Ev(%class.bar* @baz)
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