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[DebugInfo] Add test cases for FlagNonTrivial 

Summary:
This is a test case to go with D44406 which added FlagNonTrivial to mark that a C++ record is non-trivial to support CodeView debug emission. 

While it looks like FlagTypePassByValue can imply triviality and FlagTypePassByReference can imply non-triviality that is not true. Some non-trivial cases use a combination of FlagNonTrivial and FlagTypePassByValue instead of FlagTypePassByReference. See the test cases and D44406 for discussion.

Reviewers: dblaikie, rnk, zturner

Reviewed By: dblaikie

Subscribers: jdoerfert, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D59010

llvm-svn: 355890
This commit is contained in:
Aaron Smith 2019-03-12 02:00:39 +00:00
parent 3f5ce18658
commit e8475f78e2
1 changed files with 90 additions and 0 deletions
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90
clang/test/CodeGenCXX/debug-info-composite-triviality.cpp Normal file
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// RUN: %clang_cc1 -emit-llvm -debug-info-kind=standalone -triple %itanium_abi_triple %s -o - | FileCheck %s
// Cases to show some non-trivial types with flags combined with DIFlagNonTrivial and DIFlagTypePassByValue.
// CHECK-DAG: !DICompositeType({{.*}}, name: "Explicit",{{.*}}flags: DIFlagTypePassByValue | DIFlagNonTrivial
struct Explicit {
explicit Explicit();
int a;
} Explicit;
// CHECK-DAG: !DICompositeType({{.*}}, name: "Struct",{{.*}}flags: DIFlagTypePassByValue | DIFlagNonTrivial
struct Struct {
Struct() {}
} Struct;
// CHECK-DAG: !DICompositeType({{.*}}, name: "Annotated",{{.*}}flags: DIFlagTypePassByValue | DIFlagNonTrivial
struct __attribute__((trivial_abi)) Annotated {
Annotated() {};
} Annotated;
// Check a non-composite type
// CHECK-DAG: !DIGlobalVariable(name: "GlobalVar", {{.*}}type: {{.*}}, isLocal: false, isDefinition: true)
int GlobalVar = 0;
// Cases to test composite type's triviality
// CHECK-DAG: !DICompositeType({{.*}}, name: "Union",{{.*}}flags: {{.*}}DIFlagTrivial
union Union {
int a;
} Union;
// CHECK-DAG: !DICompositeType({{.*}}, name: "Trivial",{{.*}}flags: {{.*}}DIFlagTrivial
struct Trivial {
int i;
} Trivial;
// CHECK-DAG: !DICompositeType({{.*}}, name: "TrivialA",{{.*}}flags: {{.*}}DIFlagTrivial
struct TrivialA {
TrivialA() = default;
} TrivialA;
// CHECK-DAG: !DICompositeType({{.*}}, name: "TrivialB",{{.*}}flags: {{.*}}DIFlagTrivial
struct TrivialB {
int m;
TrivialB(int x) { m = x; }
TrivialB() = default;
} TrivialB;
// CHECK-DAG: !DICompositeType({{.*}}, name: "TrivialC",{{.*}}flags: {{.*}}DIFlagTrivial
struct TrivialC {
struct Trivial x;
} TrivialC;
// CHECK-DAG: !DICompositeType({{.*}}, name: "TrivialD",{{.*}}flags: {{.*}}DIFlagTrivial
struct NT {
NT() {};
};
struct TrivialD {
static struct NT x; // Member is non-trivial but is static.
} TrivialD;
// CHECK-DAG: !DICompositeType({{.*}}, name: "NonTrivial",{{.*}}flags: {{.*}}DIFlagNonTrivial
struct NonTrivial {
NonTrivial() {}
} NonTrivial;
// CHECK-DAG: !DICompositeType({{.*}}, name: "NonTrivialA",{{.*}}flags: {{.*}}DIFlagNonTrivial
struct NonTrivialA {
~NonTrivialA();
} NonTrivialA;
// CHECK-DAG: !DICompositeType({{.*}}, name: "NonTrivialB",{{.*}}flags: {{.*}}DIFlagNonTrivial
struct NonTrivialB {
struct NonTrivial x;
} NonTrivialB;
// CHECK-DAG: !DICompositeType({{.*}}, name: "NonTrivialC",{{.*}}flags: {{.*}}DIFlagNonTrivial
struct NonTrivialC {
virtual void f() {}
} NonTrivialC;
// CHECK-DAG: !DICompositeType({{.*}}, name: "NonTrivialD",{{.*}}flags: {{.*}}DIFlagNonTrivial
struct NonTrivialD : NonTrivial {
} NonTrivialD;
// CHECK-DAG: !DICompositeType({{.*}}, name: "NonTrivialE",{{.*}}flags: {{.*}}DIFlagNonTrivial
struct NonTrivialE : Trivial, NonTrivial {
} NonTrivialE;