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10edb4991c
At the moment, Clang is rather liberal in assuming that 0 (and by extension unqualified) is always a safe default. This does not work for targets that actually use a different value for the default / generic AS (for example, the SPIRV that obtains from HIPSPV or SYCL). This patch is a first, fairly safe step towards trying to clear things up by querying a modules' default AS from the target, rather than assuming it's 0, alongside fixing a few places where things break / we encode the 0 == DefaultAS assumption. A bunch of existing tests are extended to check for non-zero default AS usage.
460 lines
14 KiB
C++
460 lines
14 KiB
C++
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-macosx10.13.99 -std=c++11 -emit-llvm -o - %s | FileCheck --check-prefixes=CHECK,UNALIGNED,THROWEND %s
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// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-macosx10.14 -std=c++11 -emit-llvm -o - %s | FileCheck --check-prefixes=CHECK,ALIGNED,THROWEND %s
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// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-macosx10.14 -std=c++11 -emit-llvm -o - %s -fassume-nothrow-exception-dtor -DNOTHROWEND | FileCheck --check-prefixes=CHECK,ALIGNED,NOTHROWEND %s
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struct test1_D {
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double d;
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} d1;
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void test1() {
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throw d1;
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}
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// CHECK-LABEL: define{{.*}} void @_Z5test1v()
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// CHECK: [[EXNOBJ:%.*]] = call ptr @__cxa_allocate_exception(i64 8)
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// UNALIGNED-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[EXNOBJ]], ptr align 8 @d1, i64 8, i1 false)
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// ALIGNED-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 16 [[EXNOBJ]], ptr align 8 @d1, i64 8, i1 false)
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// CHECK-NEXT: call void @__cxa_throw(ptr [[EXNOBJ]], ptr @_ZTI7test1_D, ptr null) [[NR:#[0-9]+]]
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// CHECK-NEXT: unreachable
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struct test2_D {
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test2_D(const test2_D&o);
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test2_D();
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virtual void bar() { }
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int i; int j;
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} d2;
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void test2() {
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throw d2;
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}
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// CHECK-LABEL: define{{.*}} void @_Z5test2v()
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// CHECK: [[EXNVAR:%.*]] = alloca ptr
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// CHECK-NEXT: [[SELECTORVAR:%.*]] = alloca i32
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// CHECK-NEXT: [[EXNOBJ:%.*]] = call ptr @__cxa_allocate_exception(i64 16)
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// CHECK-NEXT: invoke void @_ZN7test2_DC1ERKS_(ptr {{[^,]*}} [[EXNOBJ]], ptr noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) @d2)
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// CHECK-NEXT: to label %[[CONT:.*]] unwind label %{{.*}}
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// : [[CONT]]: (can't check this in Release-Asserts builds)
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// CHECK: call void @__cxa_throw(ptr [[EXNOBJ]], ptr @_ZTI7test2_D, ptr null) [[NR]]
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// CHECK-NEXT: unreachable
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struct test3_D {
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test3_D() { }
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test3_D(volatile test3_D&o);
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virtual void bar();
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};
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void test3() {
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throw (volatile test3_D *)0;
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}
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// CHECK-LABEL: define{{.*}} void @_Z5test3v()
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// CHECK: [[EXNOBJ:%.*]] = call ptr @__cxa_allocate_exception(i64 8)
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// CHECK-NEXT: store ptr null, ptr [[EXNOBJ]]
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// CHECK-NEXT: call void @__cxa_throw(ptr [[EXNOBJ]], ptr @_ZTIPV7test3_D, ptr null) [[NR]]
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// CHECK-NEXT: unreachable
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void test4() {
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throw;
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}
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// CHECK-LABEL: define{{.*}} void @_Z5test4v()
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// CHECK: call void @__cxa_rethrow() [[NR]]
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// CHECK-NEXT: unreachable
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namespace test5 {
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struct A {
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A();
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A(const A&);
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~A();
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};
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void test() {
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try { throw A(); } catch (A &x) {}
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}
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// CHECK-LABEL: define{{.*}} void @_ZN5test54testEv()
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// CHECK: [[EXNOBJ:%.*]] = call ptr @__cxa_allocate_exception(i64 1)
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// CHECK: invoke void @_ZN5test51AC1Ev(ptr {{[^,]*}} [[EXNOBJ]])
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// CHECK: invoke void @__cxa_throw(ptr [[EXNOBJ]], ptr @_ZTIN5test51AE, ptr @_ZN5test51AD1Ev) [[NR]]
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// CHECK-NEXT: to label {{%.*}} unwind label %[[HANDLER:[^ ]*]]
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// : [[HANDLER]]: (can't check this in Release-Asserts builds)
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// CHECK: {{%.*}} = call i32 @llvm.eh.typeid.for.p0(ptr @_ZTIN5test51AE)
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}
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namespace test6 {
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template <class T> struct allocator {
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~allocator() throw() { }
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};
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void foo() {
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allocator<int> a;
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}
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}
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// PR7127
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namespace test7 {
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// CHECK-LABEL: define{{.*}} i32 @_ZN5test73fooEv()
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// CHECK-SAME: personality ptr @__gxx_personality_v0
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int foo() {
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// CHECK: [[CAUGHTEXNVAR:%.*]] = alloca ptr
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// CHECK-NEXT: [[SELECTORVAR:%.*]] = alloca i32
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// CHECK-NEXT: [[INTCATCHVAR:%.*]] = alloca i32
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try {
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try {
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// CHECK-NEXT: [[EXNALLOC:%.*]] = call ptr @__cxa_allocate_exception
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// CHECK-NEXT: store i32 1, ptr
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// CHECK-NEXT: invoke void @__cxa_throw(ptr [[EXNALLOC]], ptr @_ZTIi, ptr null
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throw 1;
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}
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// CHECK: [[CAUGHTVAL:%.*]] = landingpad { ptr, i32 }
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// CHECK-NEXT: catch ptr @_ZTIi
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// CHECK-NEXT: catch ptr null
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// CHECK-NEXT: [[CAUGHTEXN:%.*]] = extractvalue { ptr, i32 } [[CAUGHTVAL]], 0
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// CHECK-NEXT: store ptr [[CAUGHTEXN]], ptr [[CAUGHTEXNVAR]]
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// CHECK-NEXT: [[SELECTOR:%.*]] = extractvalue { ptr, i32 } [[CAUGHTVAL]], 1
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// CHECK-NEXT: store i32 [[SELECTOR]], ptr [[SELECTORVAR]]
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// CHECK-NEXT: br label
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// CHECK: [[SELECTOR:%.*]] = load i32, ptr [[SELECTORVAR]]
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// CHECK-NEXT: [[T0:%.*]] = call i32 @llvm.eh.typeid.for.p0(ptr @_ZTIi)
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// CHECK-NEXT: icmp eq i32 [[SELECTOR]], [[T0]]
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// CHECK-NEXT: br i1
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// CHECK: [[T0:%.*]] = load ptr, ptr [[CAUGHTEXNVAR]]
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// CHECK-NEXT: [[T1:%.*]] = call ptr @__cxa_begin_catch(ptr [[T0]])
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// CHECK-NEXT: [[T3:%.*]] = load i32, ptr [[T1]]
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// CHECK-NEXT: store i32 [[T3]], ptr {{%.*}}, align 4
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// CHECK-NEXT: invoke void @__cxa_rethrow
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catch (int) {
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throw;
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}
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}
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// CHECK: [[CAUGHTVAL:%.*]] = landingpad { ptr, i32 }
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// CHECK-NEXT: catch ptr null
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// CHECK-NEXT: [[CAUGHTEXN:%.*]] = extractvalue { ptr, i32 } [[CAUGHTVAL]], 0
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// CHECK-NEXT: store ptr [[CAUGHTEXN]], ptr [[CAUGHTEXNVAR]]
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// CHECK-NEXT: [[SELECTOR:%.*]] = extractvalue { ptr, i32 } [[CAUGHTVAL]], 1
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// CHECK-NEXT: store i32 [[SELECTOR]], ptr [[SELECTORVAR]]
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// CHECK-NEXT: call void @__cxa_end_catch()
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// CHECK-NEXT: br label
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// CHECK: load ptr, ptr [[CAUGHTEXNVAR]]
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// CHECK-NEXT: call ptr @__cxa_begin_catch
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// CHECK-NEXT: call void @__cxa_end_catch
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catch (...) {
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}
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// CHECK: ret i32 0
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return 0;
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}
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}
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// Ordering of destructors in a catch handler.
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namespace test8 {
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struct A { A(const A&); ~A(); };
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void bar();
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// CHECK-LABEL: define{{.*}} void @_ZN5test83fooEv()
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void foo() {
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try {
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// CHECK: invoke void @_ZN5test83barEv()
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bar();
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} catch (A a) {
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// CHECK: call ptr @__cxa_get_exception_ptr
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// CHECK-NEXT: invoke void @_ZN5test81AC1ERKS0_(
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// CHECK: call ptr @__cxa_begin_catch
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// CHECK-NEXT: call void @_ZN5test81AD1Ev(
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// CHECK: call void @__cxa_end_catch()
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// CHECK: ret void
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}
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}
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}
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// Constructor function-try-block must rethrow on fallthrough.
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namespace test9 {
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void opaque();
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struct A { A(); };
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// CHECK-LABEL: define{{.*}} void @_ZN5test91AC2Ev(ptr {{[^,]*}} %this) unnamed_addr
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// CHECK-SAME: personality ptr @__gxx_personality_v0
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A::A() try {
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// CHECK: invoke void @_ZN5test96opaqueEv()
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opaque();
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} catch (int x) {
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// CHECK: landingpad { ptr, i32 }
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// CHECK-NEXT: catch ptr @_ZTIi
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// CHECK: call ptr @__cxa_begin_catch
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// CHECK: invoke void @_ZN5test96opaqueEv()
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// CHECK: invoke void @__cxa_rethrow()
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// CHECK-LABEL: define{{.*}} void @_ZN5test91AC1Ev(ptr {{[^,]*}} %this) unnamed_addr
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// CHECK: call void @_ZN5test91AC2Ev
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// CHECK-NEXT: ret void
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opaque();
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}
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}
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// __cxa_end_catch can throw for some kinds of caught exceptions.
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namespace test10 {
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void opaque();
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struct A { ~A(); };
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struct B { int x; };
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// CHECK-LABEL: define{{.*}} void @_ZN6test103fooEv()
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void foo() {
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A a; // force a cleanup context
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try {
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// CHECK: invoke void @_ZN6test106opaqueEv()
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opaque();
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} catch (int i) {
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// CHECK: call ptr @__cxa_begin_catch
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// CHECK-NEXT: load i32, ptr
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// CHECK-NEXT: store i32
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// CHECK-NEXT: call void @__cxa_end_catch() [[NUW:#[0-9]+]]
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} catch (B a) {
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// CHECK: call ptr @__cxa_begin_catch
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// CHECK-NEXT: call void @llvm.memcpy
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// THROWEND-NEXT: invoke void @__cxa_end_catch()
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// NOTHROWEND-NEXT: call void @__cxa_end_catch() [[NUW]]
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} catch (...) {
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// CHECK: call ptr @__cxa_begin_catch
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// THROWEND-NEXT: invoke void @__cxa_end_catch()
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// NOTHROWEND-NEXT: call void @__cxa_end_catch() [[NUW]]
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}
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// THROWEND: call void @_ZN6test101AD1Ev(
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// NOTHROWEND-NOT: call void @_ZN6test101AD1Ev(
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}
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}
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// __cxa_begin_catch returns pointers by value, even when catching by reference
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namespace test11 {
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void opaque();
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// CHECK-LABEL: define{{.*}} void @_ZN6test113fooEv()
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void foo() {
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try {
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// CHECK: invoke void @_ZN6test116opaqueEv()
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opaque();
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} catch (int**&p) {
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// CHECK: [[EXN:%.*]] = load ptr, ptr
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// CHECK-NEXT: call ptr @__cxa_begin_catch(ptr [[EXN]]) [[NUW]]
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// CHECK-NEXT: [[ADJ1:%.*]] = getelementptr i8, ptr [[EXN]], i32 32
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// CHECK-NEXT: store ptr [[ADJ1]], ptr [[P:%.*]]
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// CHECK-NEXT: call void @__cxa_end_catch() [[NUW]]
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}
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}
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struct A {};
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// CHECK-LABEL: define{{.*}} void @_ZN6test113barEv()
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void bar() {
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try {
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// CHECK: [[EXNSLOT:%.*]] = alloca ptr
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// CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
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// CHECK-NEXT: [[P:%.*]] = alloca ptr,
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// CHECK-NEXT: [[TMP:%.*]] = alloca ptr
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// CHECK-NEXT: invoke void @_ZN6test116opaqueEv()
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opaque();
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} catch (A*&p) {
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// CHECK: [[EXN:%.*]] = load ptr, ptr [[EXNSLOT]]
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// CHECK-NEXT: [[ADJ1:%.*]] = call ptr @__cxa_begin_catch(ptr [[EXN]]) [[NUW]]
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// CHECK-NEXT: store ptr [[ADJ1]], ptr [[TMP]]
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// CHECK-NEXT: store ptr [[TMP]], ptr [[P]]
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// CHECK-NEXT: call void @__cxa_end_catch() [[NUW]]
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}
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}
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}
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// PR7686
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namespace test12 {
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struct A { ~A() noexcept(false); };
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bool opaque(const A&);
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// CHECK-LABEL: define{{.*}} void @_ZN6test124testEv()
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void test() {
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// CHECK: [[X:%.*]] = alloca [[A:%.*]],
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// CHECK: [[EHCLEANUPDEST:%.*]] = alloca i32
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// CHECK: [[Y:%.*]] = alloca [[A:%.*]]
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// CHECK: [[Z:%.*]] = alloca [[A]]
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// CHECK: [[CLEANUPDEST:%.*]] = alloca i32
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A x;
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// CHECK: invoke noundef zeroext i1 @_ZN6test126opaqueERKNS_1AE(
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if (opaque(x)) {
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A y;
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A z;
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// CHECK: invoke void @_ZN6test121AD1Ev(ptr {{[^,]*}} [[Z]])
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// CHECK: invoke void @_ZN6test121AD1Ev(ptr {{[^,]*}} [[Y]])
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// CHECK-NOT: switch
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goto success;
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}
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success:
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bool _ = true;
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// CHECK: call void @_ZN6test121AD1Ev(ptr {{[^,]*}} [[X]])
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// CHECK-NEXT: ret void
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}
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}
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// Reduced from some TableGen code that was causing a self-host crash.
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namespace test13 {
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struct A { ~A(); };
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void test0(int x) {
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try {
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switch (x) {
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case 0:
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break;
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case 1:{
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A a;
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break;
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}
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default:
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return;
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}
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return;
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} catch (int x) {
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}
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return;
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}
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void test1(int x) {
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A y;
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try {
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switch (x) {
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default: break;
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}
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} catch (int x) {}
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}
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}
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namespace test14 {
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struct A { ~A(); };
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struct B { ~B(); };
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B b();
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void opaque();
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void foo() {
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A a;
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try {
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B str = b();
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opaque();
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} catch (int x) {
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}
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}
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}
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// JumpDests shouldn't get confused by scopes that aren't normal cleanups.
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namespace test15 {
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struct A { ~A(); };
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bool opaque(int);
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// CHECK-LABEL: define{{.*}} void @_ZN6test153fooEv()
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void foo() {
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A a;
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try {
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// CHECK: [[X:%.*]] = alloca i32
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// CHECK: store i32 10, ptr [[X]]
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// CHECK-NEXT: br label
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// -> while.cond
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int x = 10;
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while (true) {
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// CHECK: load i32, ptr [[X]]
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// CHECK-NEXT: [[COND:%.*]] = invoke noundef zeroext i1 @_ZN6test156opaqueEi
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// CHECK: br i1 [[COND]]
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if (opaque(x))
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// CHECK: br label
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break;
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// CHECK: br label
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}
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// CHECK: br label
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} catch (int x) { }
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// CHECK: call void @_ZN6test151AD1Ev
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}
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}
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namespace test16 {
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struct A { A(); ~A() noexcept(false); };
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struct B { int x; B(const A &); ~B() noexcept(false); };
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void foo();
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bool cond();
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// CHECK-LABEL: define{{.*}} void @_ZN6test163barEv()
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void bar() {
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// THROWEND: [[EXN_SAVE:%.*]] = alloca ptr
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// THROWEND-NEXT: [[EXN_ACTIVE:%.*]] = alloca i1
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// THROWEND-NEXT: [[TEMP:%.*]] = alloca [[A:%.*]],
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// THROWEND-NEXT: [[EXNSLOT:%.*]] = alloca ptr
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// THROWEND-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
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// THROWEND-NEXT: [[TEMP_ACTIVE:%.*]] = alloca i1
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#ifndef NOTHROWEND
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cond() ? throw B(A()) : foo();
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#endif
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// THROWEND-NEXT: [[COND:%.*]] = call noundef zeroext i1 @_ZN6test164condEv()
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// THROWEND-NEXT: store i1 false, ptr [[EXN_ACTIVE]]
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// THROWEND-NEXT: store i1 false, ptr [[TEMP_ACTIVE]]
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// THROWEND-NEXT: br i1 [[COND]],
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// THROWEND: [[EXN:%.*]] = call ptr @__cxa_allocate_exception(i64 4)
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// THROWEND-NEXT: store ptr [[EXN]], ptr [[EXN_SAVE]]
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// THROWEND-NEXT: store i1 true, ptr [[EXN_ACTIVE]]
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// THROWEND-NEXT: invoke void @_ZN6test161AC1Ev(ptr {{[^,]*}} [[TEMP]])
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// THROWEND: store i1 true, ptr [[TEMP_ACTIVE]]
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// THROWEND-NEXT: invoke void @_ZN6test161BC1ERKNS_1AE(ptr {{[^,]*}} [[EXN]], ptr noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) [[TEMP]])
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// THROWEND: store i1 false, ptr [[EXN_ACTIVE]]
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// THROWEND-NEXT: invoke void @__cxa_throw(ptr [[EXN]],
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// THROWEND: invoke void @_ZN6test163fooEv()
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// THROWEND: br label
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// THROWEND: invoke void @_ZN6test161AD1Ev(ptr {{[^,]*}} [[TEMP]])
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// THROWEND: ret void
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// THROWEND: [[T0:%.*]] = load i1, ptr [[EXN_ACTIVE]]
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// THROWEND-NEXT: br i1 [[T0]]
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// THROWEND: [[T1:%.*]] = load ptr, ptr [[EXN_SAVE]]
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// THROWEND-NEXT: call void @__cxa_free_exception(ptr [[T1]])
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// THROWEND-NEXT: br label
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}
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}
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namespace test17 {
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class BaseException {
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private:
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int a[4];
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public:
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BaseException() {};
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};
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class DerivedException: public BaseException {
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};
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int foo() {
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throw DerivedException();
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// The alignment passed to memset is 16 on Darwin.
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// CHECK: [[T0:%.*]] = call ptr @__cxa_allocate_exception(i64 16)
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// UNALIGNED-NEXT: call void @llvm.memset.p0.i64(ptr align 8 [[T0]], i8 0, i64 16, i1 false)
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// ALIGNED-NEXT: call void @llvm.memset.p0.i64(ptr align 16 [[T0]], i8 0, i64 16, i1 false)
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}
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}
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// CHECK: attributes [[NUW]] = { nounwind }
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// CHECK: attributes [[NR]] = { noreturn }
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