1; RUN: llc -mtriple=x86_64-unknown-unknown -o - %s | FileCheck %s
2; RUN: llc -mtriple=x86_64-unknown-unknown -filetype=obj < %s \
3; RUN:   | llvm-dwarfdump -v - | FileCheck %s --check-prefix=DWARF
4
5define i1 @test() !dbg !4 {
6entry:
7  %end = alloca i64, align 8
8  br label %while.cond
9
10while.cond:
11  call void @llvm.dbg.value(metadata i64* %end, metadata !5, metadata !6), !dbg !7
12  %call = call i1 @fn(i64* %end, i64* %end, i64* null, i8* null, i64 0, i64* null, i32* null, i8* null), !dbg !7
13  br label %while.body
14
15while.body:
16  br i1 0, label %while.end, label %while.cond
17
18while.end:
19  ret i1 true
20}
21
22; CHECK-LABEL: test
23; To get the value of the variable, we need to do [$rsp+8], i.e:
24; CHECK:       #DEBUG_VALUE: test:w <- [DW_OP_plus_uconst 8, DW_OP_deref] $rsp
25; DWARF:  DW_AT_location [DW_FORM_sec_offset] (
26; DWARF-NEXT:   [{{.*}}, {{.*}}): DW_OP_breg7 RSP+8)
27
28; Note: A previous version of this test checked for `[DW_OP_plus_uconst 8] [$rsp+0]`,
29; which is incorrect, because it adds the stack offset after dereferencing the stack pointer.
30
31declare i1 @fn(i64*, i64*, i64*, i8*, i64, i64*, i32*, i8*)
32declare void @llvm.dbg.value(metadata, metadata, metadata)
33
34!llvm.dbg.cu = !{!0}
35!llvm.module.flags = !{!2,!3}
36
37!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 4.0.0", emissionKind: FullDebug)
38!1 = !DIFile(filename: "test.c", directory: "/")
39!2 = !{i32 2, !"Dwarf Version", i32 4}
40!3 = !{i32 2, !"Debug Info Version", i32 3}
41!4 = distinct !DISubprogram(name: "test", type: !10, unit: !0)
42!5 = !DILocalVariable(name: "w", scope: !4, type: !9)
43!6 = !DIExpression(DW_OP_deref)
44!7 = !DILocation(line: 210, column: 12, scope: !4)
45!8 = !{!9}
46!9 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)
47!10 = !DISubroutineType(types: !8)
48