1; RUN: opt -deadargelim -S < %s | FileCheck %s
2; PR14016
3
4; Built with clang (then manually running -mem2reg with opt) from the following source:
5; static void f1(int, ...) {
6; }
7;
8; void f2() {
9;   f1(1);
10; }
11
12; Test both varargs removal and removal of a traditional dead arg together, to
13; test both the basic functionality, and a particular wrinkle involving updating
14; the function->debug info mapping on update to ensure it's accurate when used
15; again for the next removal.
16
17; CHECK: void ()* @_ZL2f1iz, {{.*}} ; [ DW_TAG_subprogram ] {{.*}} [f1]
18
19; Check that debug info metadata for subprograms stores pointers to
20; updated LLVM functions.
21
22; Function Attrs: uwtable
23define void @_Z2f2v() #0 {
24entry:
25  call void (i32, ...)* @_ZL2f1iz(i32 1), !dbg !15
26  ret void, !dbg !16
27}
28
29; Function Attrs: nounwind uwtable
30define internal void @_ZL2f1iz(i32, ...) #1 {
31entry:
32  call void @llvm.dbg.value(metadata i32 %0, i64 0, metadata !17, metadata !18), !dbg !19
33  ret void, !dbg !20
34}
35
36; Function Attrs: nounwind readnone
37declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
38
39; Function Attrs: nounwind readnone
40declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
41
42attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
43attributes #1 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
44attributes #2 = { nounwind readnone }
45
46!llvm.dbg.cu = !{!0}
47!llvm.module.flags = !{!12, !13}
48!llvm.ident = !{!14}
49
50!0 = !{!"0x11\004\00clang version 3.6.0 \000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/dbg.cpp] [DW_LANG_C_plus_plus]
51!1 = !{!"dbg.cpp", !"/tmp/dbginfo"}
52!2 = !{}
53!3 = !{!4, !8}
54!4 = !{!"0x2e\00f2\00f2\00_Z2f2v\004\000\001\000\000\00256\000\004", !1, !5, !6, null, void ()* @_Z2f2v, null, null, !2} ; [ DW_TAG_subprogram ] [line 4] [def] [f2]
55!5 = !{!"0x29", !1}    ; [ DW_TAG_file_type ] [/tmp/dbginfo/dbg.cpp]
56!6 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
57!7 = !{null}
58!8 = !{!"0x2e\00f1\00f1\00_ZL2f1iz\001\001\001\000\000\00256\000\001", !1, !5, !9, null, void (i32, ...)* @_ZL2f1iz, null, null, !2} ; [ DW_TAG_subprogram ] [line 1] [local] [def] [f1]
59!9 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !10, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
60!10 = !{null, !11, null}
61!11 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
62!12 = !{i32 2, !"Dwarf Version", i32 4}
63!13 = !{i32 2, !"Debug Info Version", i32 2}
64!14 = !{!"clang version 3.6.0 "}
65!15 = !MDLocation(line: 5, column: 3, scope: !4)
66!16 = !MDLocation(line: 6, column: 1, scope: !4)
67!17 = !{!"0x101\00\0016777217\000", !8, !5, !11} ; [ DW_TAG_arg_variable ] [line 1]
68!18 = !{!"0x102"}               ; [ DW_TAG_expression ]
69!19 = !MDLocation(line: 1, column: 19, scope: !8)
70!20 = !MDLocation(line: 2, column: 1, scope: !8)
71