a2347baaec
Because references must be initialized using some evaluated expression, they must point to something, and a callee can assume the reference parameter is dereferenceable. Taking advantage of a new attribute just added to LLVM, mark them as such. Because dereferenceability in addrspace(0) implies nonnull in the backend, we don't need both attributes. However, we need to know the size of the object to use the dereferenceable attribute, so for incomplete types we still emit only nonnull. llvm-svn: 213386
115 lines
2.0 KiB
C++
115 lines
2.0 KiB
C++
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -Wno-unreachable-code -Werror -triple x86_64-linux-gnu -emit-llvm -o - %s | FileCheck %s
|
|
|
|
int val = 42;
|
|
int& test1() {
|
|
return throw val, val;
|
|
}
|
|
|
|
int test2() {
|
|
return val ? throw val : val;
|
|
}
|
|
|
|
// rdar://problem/8608801
|
|
void test3() {
|
|
throw false;
|
|
}
|
|
|
|
// PR10582
|
|
int test4() {
|
|
return 1 ? throw val : val;
|
|
}
|
|
|
|
// PR15923
|
|
int test5(bool x, bool y, int z) {
|
|
return (x ? throw 1 : y) ? z : throw 2;
|
|
}
|
|
// CHECK-LABEL: define i32 @_Z5test5bbi(
|
|
// CHECK: br i1
|
|
//
|
|
// x.true:
|
|
// CHECK: call void @__cxa_throw(
|
|
// CHECK-NEXT: unreachable
|
|
//
|
|
// x.false:
|
|
// CHECK: br i1
|
|
//
|
|
// y.true:
|
|
// CHECK: load i32*
|
|
// CHECK: br label
|
|
//
|
|
// y.false:
|
|
// CHECK: call void @__cxa_throw(
|
|
// CHECK-NEXT: unreachable
|
|
//
|
|
// end:
|
|
// CHECK: ret i32
|
|
|
|
int test6(bool x, bool y, int z) {
|
|
return (x ? throw 1 : y) ? z : (throw 2);
|
|
}
|
|
// CHECK-LABEL: define i32 @_Z5test6bbi(
|
|
// CHECK: br i1
|
|
//
|
|
// x.true:
|
|
// CHECK: call void @__cxa_throw(
|
|
// CHECK-NEXT: unreachable
|
|
//
|
|
// x.false:
|
|
// CHECK: br i1
|
|
//
|
|
// y.true:
|
|
// CHECK: load i32*
|
|
// CHECK: br label
|
|
//
|
|
// y.false:
|
|
// CHECK: call void @__cxa_throw(
|
|
// CHECK-NEXT: unreachable
|
|
//
|
|
// end:
|
|
// CHECK: ret i32
|
|
|
|
namespace DR1560 {
|
|
struct A {
|
|
~A();
|
|
};
|
|
extern bool b;
|
|
A get();
|
|
// CHECK-LABEL: @_ZN6DR15601bE
|
|
const A &r = b ? get() : throw 0;
|
|
// CHECK-NOT: call {{.*}}@_ZN6DR15601AD1Ev
|
|
// CHECK: call {{.*}} @__cxa_atexit({{.*}} @_ZN6DR15601AD1Ev {{.*}} @_ZGRN6DR15601rE
|
|
// CHECK-NOT: call {{.*}}@_ZN6DR15601AD1Ev
|
|
}
|
|
|
|
// CHECK-LABEL: define void @_Z5test7b(
|
|
void test7(bool cond) {
|
|
// CHECK: br i1
|
|
//
|
|
// x.true:
|
|
// CHECK: call void @__cxa_throw(
|
|
// CHECK-NEXT: unreachable
|
|
//
|
|
// x.false:
|
|
// CHECK: br label
|
|
//
|
|
// end:
|
|
// CHECK: ret void
|
|
cond ? throw test7 : val;
|
|
}
|
|
|
|
// CHECK-LABEL: define dereferenceable(4) i32* @_Z5test8b(
|
|
int &test8(bool cond) {
|
|
// CHECK: br i1
|
|
//
|
|
// x.true:
|
|
// CHECK: br label
|
|
//
|
|
// x.false:
|
|
// CHECK: call void @__cxa_throw(
|
|
// CHECK-NEXT: unreachable
|
|
//
|
|
// end:
|
|
// CHECK: ret i32* @val
|
|
return cond ? val : ((throw "foo"));
|
|
}
|