1; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=pic -o - %s | FileCheck %s
2
3; Make sure exception-handling PIC code can be linked correctly. An alternative
4; to the sequence described below would have .gcc_except_table itself writable
5; and not use the indirection, but this isn't what LLVM does right now.
6
7  ; There should be a read-only .gcc_except_table section...
8; CHECK: .section .gcc_except_table,"a"
9
10  ; ... referring indirectly to stubs for its typeinfo ...
11; CHECK: // @TType Encoding = indirect pcrel sdata8
12  ; ... one of which is "int"'s typeinfo
13; CHECK: .Ltmp9:
14; CHECK-NEXT: .xword  .L_ZTIi.DW.stub-.Ltmp9
15
16  ; .. and which is properly defined (in a writable section for the dynamic loader) later.
17; CHECK: .section .data.rel,"aw"
18; CHECK: .L_ZTIi.DW.stub:
19; CHECK-NEXT: .xword _ZTIi
20
21@_ZTIi = external constant i8*
22
23define i32 @_Z3barv() {
24entry:
25  invoke void @_Z3foov()
26          to label %return unwind label %lpad
27
28lpad:                                             ; preds = %entry
29  %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
30          catch i8* bitcast (i8** @_ZTIi to i8*)
31  %1 = extractvalue { i8*, i32 } %0, 1
32  %2 = tail call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) nounwind
33  %matches = icmp eq i32 %1, %2
34  br i1 %matches, label %catch, label %eh.resume
35
36catch:                                            ; preds = %lpad
37  %3 = extractvalue { i8*, i32 } %0, 0
38  %4 = tail call i8* @__cxa_begin_catch(i8* %3) nounwind
39  %5 = bitcast i8* %4 to i32*
40  %exn.scalar = load i32* %5, align 4
41  tail call void @__cxa_end_catch() nounwind
42  br label %return
43
44return:                                           ; preds = %entry, %catch
45  %retval.0 = phi i32 [ %exn.scalar, %catch ], [ 42, %entry ]
46  ret i32 %retval.0
47
48eh.resume:                                        ; preds = %lpad
49  resume { i8*, i32 } %0
50}
51
52declare void @_Z3foov()
53
54declare i32 @__gxx_personality_v0(...)
55
56declare i32 @llvm.eh.typeid.for(i8*) nounwind readnone
57
58declare i8* @__cxa_begin_catch(i8*)
59
60declare void @__cxa_end_catch()
61