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|
// RUN: %clang_cc1 %s -triple x86_64-pc-win32 -fms-extensions -emit-llvm -o - | FileCheck %s
void abort(void) __attribute__((noreturn));
void might_crash(void);
void cleanup(void);
int check_condition(void);
void basic_finally(void) {
__try {
might_crash();
} __finally {
cleanup();
}
}
// CHECK-LABEL: define void @basic_finally()
// CHECK: invoke void @might_crash()
// CHECK: to label %[[invoke_cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// CHECK: [[invoke_cont]]
// CHECK: store i8 0, i8* %[[abnormal:[^ ]*]]
// CHECK: br label %[[finally:[^ ]*]]
//
// CHECK: [[finally]]
// CHECK: call void @cleanup()
// CHECK: load i8, i8* %[[abnormal]]
// CHECK: icmp eq
// CHECK: br i1 %{{.*}}, label %[[finallycont:[^ ]*]], label %[[resumecont:[^ ]*]]
//
// CHECK: [[finallycont]]
// CHECK-NEXT: ret void
//
// CHECK: [[lpad]]
// CHECK-NEXT: landingpad
// CHECK-NEXT: cleanup
// CHECK: store i8 1, i8* %[[abnormal]]
// CHECK: br label %[[finally]]
//
// CHECK: [[resumecont]]
// CHECK: br label %[[ehresume:[^ ]*]]
//
// CHECK: [[ehresume]]
// CHECK: resume { i8*, i32 }
// Mostly check that we don't double emit 'r' which would crash.
void decl_in_finally(void) {
__try {
might_crash();
} __finally {
int r;
}
}
// Ditto, don't crash double emitting 'l'.
void label_in_finally(void) {
__try {
might_crash();
} __finally {
l:
cleanup();
if (check_condition())
goto l;
}
}
// CHECK-LABEL: define void @label_in_finally()
// CHECK: invoke void @might_crash()
// CHECK: to label %[[invoke_cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// CHECK: [[invoke_cont]]
// CHECK: store i8 0, i8* %[[abnormal:[^ ]*]]
// CHECK: br label %[[finally:[^ ]*]]
//
// CHECK: [[finally]]
// CHECK: br label %[[l:[^ ]*]]
//
// CHECK: [[l]]
// CHECK: call void @cleanup()
// CHECK: call i32 @check_condition()
// CHECK: br i1 {{.*}}, label
// CHECK: br label %[[l]]
int crashed;
void use_abnormal_termination(void) {
__try {
might_crash();
} __finally {
crashed = __abnormal_termination();
}
}
// CHECK-LABEL: define void @use_abnormal_termination()
// CHECK: invoke void @might_crash()
// CHECK: to label %[[invoke_cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// CHECK: [[invoke_cont]]
// CHECK: store i8 0, i8* %[[abnormal:[^ ]*]]
// CHECK: br label %[[finally:[^ ]*]]
//
// CHECK: [[finally]]
// CHECK: load i8, i8* %[[abnormal]]
// CHECK: zext i8 %{{.*}} to i32
// CHECK: store i32 %{{.*}}, i32* @crashed
// CHECK: load i8, i8* %[[abnormal]]
// CHECK: icmp eq
// CHECK: br i1 %{{.*}}, label %[[finallycont:[^ ]*]], label %[[resumecont:[^ ]*]]
//
// CHECK: [[finallycont]]
// CHECK-NEXT: ret void
//
// CHECK: [[lpad]]
// CHECK-NEXT: landingpad
// CHECK-NEXT: cleanup
// CHECK: store i8 1, i8* %[[abnormal]]
// CHECK: br label %[[finally]]
//
// CHECK: [[resumecont]]
// CHECK: br label %[[ehresume:[^ ]*]]
//
// CHECK: [[ehresume]]
// CHECK: resume { i8*, i32 }
void noreturn_noop_finally() {
__try {
__noop();
} __finally {
abort();
}
}
// CHECK-LABEL: define void @noreturn_noop_finally()
// CHECK: store i8 0, i8* %
// CHECK: br label %[[finally:[^ ]*]]
// CHECK: [[finally]]
// CHECK: call void @abort()
// CHECK-NEXT: unreachable
// CHECK-NOT: load
void noreturn_finally() {
__try {
might_crash();
} __finally {
abort();
}
}
// CHECK-LABEL: define void @noreturn_finally()
// CHECK: invoke void @might_crash()
// CHECK: to label %[[cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// CHECK: [[cont]]
// CHECK: store i8 0, i8* %
// CHECK: br label %[[finally:[^ ]*]]
//
// CHECK: [[finally]]
// CHECK: call void @abort()
// CHECK-NEXT: unreachable
//
// CHECK: [[lpad]]
// CHECK: landingpad
// CHECK-NEXT: cleanup
// CHECK: store i8 1, i8* %
// CHECK: br label %[[finally]]
int finally_with_return() {
__try {
return 42;
} __finally {
}
}
// CHECK-LABEL: define i32 @finally_with_return()
// CHECK: store i8 0, i8* %
// CHECK-NEXT: br label %[[finally:[^ ]*]]
//
// CHECK: [[finally]]
// CHECK-NEXT: br label %[[finallycont:[^ ]*]]
//
// CHECK: [[finallycont]]
// CHECK-NEXT: ret i32 42
int nested___finally___finally() {
__try {
__try {
} __finally {
return 1;
}
} __finally {
// Intentionally no return here.
}
return 0;
}
// CHECK-LABEL: define i32 @nested___finally___finally
// CHECK: store i8 0, i8* %
// CHECK-NEXT: br label %[[finally:[^ ]*]]
//
// CHECK: [[finally]]
// CHECK-NEXT: store i32 1, i32* %
// CHECK-NEXT: store i32 1, i32* %
// CHECK-NEXT: br label %[[cleanup:[^ ]*]]
//
// The finally's unreachable continuation block:
// CHECK: store i32 0, i32* %
// CHECK-NEXT: br label %[[cleanup]]
//
// CHECK: [[cleanup]]
// CHECK-NEXT: store i8 0, i8* %
// CHECK-NEXT: br label %[[outerfinally:[^ ]*]]
//
// CHECK: [[outerfinally]]
// CHECK-NEXT: br label %[[finallycont:[^ ]*]]
//
// CHECK: [[finallycont]]
// CHECK-NEXT: %[[dest:[^ ]*]] = load i32, i32* %
// CHECK-NEXT: switch i32 %[[dest]]
// CHECK-NEXT: i32 0, label %[[cleanupcont:[^ ]*]]
//
// CHECK: [[cleanupcont]]
// CHECK-NEXT: store i32 0, i32* %
// CHECK-NEXT: br label %[[return:[^ ]*]]
//
// CHECK: [[return]]
// CHECK-NEXT: %[[reg:[^ ]*]] = load i32, i32* %
// CHECK-NEXT: ret i32 %[[reg]]
int nested___finally___finally_with_eh_edge() {
__try {
__try {
might_crash();
} __finally {
return 899;
}
} __finally {
// Intentionally no return here.
}
return 912;
}
// CHECK-LABEL: define i32 @nested___finally___finally_with_eh_edge
// CHECK: invoke void @might_crash() #3
// CHECK-NEXT: to label %[[invokecont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// CHECK: [[invokecont]]
// CHECK-NEXT: store i8 0, i8* %[[abnormal:[^ ]*]]
// CHECK-NEXT: br label %[[finally:[^ ]*]]
// CHECK: [[finally]]
// CHECK-NEXT: store i32 899, i32* %
// CHECK-NEXT: store i32 1, i32* %
// CHECK-NEXT: br label %[[cleanup:[^ ]*]]
//
// The inner finally's unreachable continuation block:
// CHECK: store i32 0, i32* %
// CHECK-NEXT: br label %[[cleanup]]
//
// CHECK: [[cleanup]]
// CHECK-NEXT: store i8 0, i8* %
// CHECK-NEXT: br label %[[outerfinally:[^ ]*]]
//
// CHECK: [[outerfinally]]
// CHECK-NEXT: %[[abnormallocal:[^ ]*]] = load i8, i8* %[[abnormal]]
// CHECK-NEXT: %[[reg:[^ ]*]] = icmp eq i8 %[[abnormallocal]], 0
// CHECK-NEXT: br i1 %[[reg]], label %[[finallycont:[^ ]*]], label %[[finallyresume:[^ ]*]]
//
// CHECK: [[finallycont]]
// CHECK-NEXT: %[[dest:[^ ]*]] = load i32, i32* %
// CHECK-NEXT: switch i32 %[[dest]]
// CHECK-NEXT: i32 0, label %[[cleanupcont:[^ ]*]]
//
// CHECK: [[cleanupcont]]
// CHECK-NEXT: store i32 912, i32* %
// CHECK-NEXT: br label %[[return:[^ ]*]]
//
//
// CHECK: [[lpad]]
// CHECK-NEXT: landingpad
// CHECK-NEXT: cleanup
// CHECK: store i8 1, i8* %[[abnormal]]
// CHECK: br label %[[finally]]
//
// The inner finally's unreachable resume block:
// CHECK: store i8 1, i8* %[[abnormal]]
// CHECK-NEXT: br label %[[outerfinally]]
//
// CHECK: [[finallyresume]]
// CHECK-NEXT: br label %[[ehresume:[^ ]*]]
//
// CHECK: [[return]]
// CHECK-NEXT: %[[reg:[^ ]*]] = load i32, i32* %
// CHECK-NEXT: ret i32 %[[reg]]
//
// The ehresume block, not reachable either.
// CHECK: [[ehresume]]
// CHECK: resume
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