1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
; RUN: llc < %s -march=x86-64 -mtriple=x86_64-unknown-unknown -mcpu=generic | FileCheck %s
; Both functions should produce the same code. The presence of debug values
; should not affect the scheduling strategy.
; Generated from:
; char argc;
; class C {
; public:
; int test(char ,char ,char ,...);
; };
; void foo() {
; C c;
; char lc = argc;
; c.test(0,argc,0,lc);
; c.test(0,argc,0,lc);
; }
;
; with
; clang -O2 -c test.cpp -emit-llvm -S
; clang -O2 -c test.cpp -emit-llvm -S -g
;
%class.C = type { i8 }
@argc = global i8 0, align 1
declare i32 @test_function(%class.C*, i8 signext, i8 signext, i8 signext, ...)
; CHECK-LABEL: test_without_debug
; CHECK: movl [[A:%[a-z]+]], [[B:%[a-z]+]]
; CHECK-NEXT: movl [[A]], [[C:%[a-z]+]]
define void @test_without_debug() {
entry:
%c = alloca %class.C, align 1
%0 = load i8, i8* @argc, align 1
%conv = sext i8 %0 to i32
%call = call i32 (%class.C*, i8, i8, i8, ...)* @test_function(%class.C* %c, i8 signext 0, i8 signext %0, i8 signext 0, i32 %conv)
%1 = load i8, i8* @argc, align 1
%call2 = call i32 (%class.C*, i8, i8, i8, ...)* @test_function(%class.C* %c, i8 signext 0, i8 signext %1, i8 signext 0, i32 %conv)
ret void
}
; CHECK-LABEL: test_with_debug
; CHECK: movl [[A]], [[B]]
; CHECK-NEXT: movl [[A]], [[C]]
define void @test_with_debug() {
entry:
%c = alloca %class.C, align 1
%0 = load i8, i8* @argc, align 1
tail call void @llvm.dbg.value(metadata i8 %0, i64 0, metadata !19, metadata !29)
%conv = sext i8 %0 to i32
tail call void @llvm.dbg.value(metadata %class.C* %c, i64 0, metadata !18, metadata !29)
%call = call i32 (%class.C*, i8, i8, i8, ...)* @test_function(%class.C* %c, i8 signext 0, i8 signext %0, i8 signext 0, i32 %conv)
%1 = load i8, i8* @argc, align 1
call void @llvm.dbg.value(metadata %class.C* %c, i64 0, metadata !18, metadata !29)
%call2 = call i32 (%class.C*, i8, i8, i8, ...)* @test_function(%class.C* %c, i8 signext 0, i8 signext %1, i8 signext 0, i32 %conv)
ret void
}
declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!22, !23}
!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, file: !1, enums: !2, retainedTypes: !3, subprograms: !12, globals: !20, imports: !2)
!1 = !MDFile(filename: "test.cpp", directory: "")
!2 = !{}
!3 = !{!4}
!4 = !MDCompositeType(tag: DW_TAG_class_type, name: "C", line: 2, size: 8, align: 8, file: !1, elements: !5, identifier: "_ZTS1C")
!5 = !{!6}
!6 = !MDSubprogram(name: "test", file: !1, scope: !"_ZTS1C", type: !7)
!7 = !MDSubroutineType(types: !8)
!8 = !{!9, !10, !11, !11, !11, null}
!9 = !MDBasicType(encoding: DW_ATE_signed, size: 32, align: 32, name: "int")
!10 = !MDDerivedType(baseType: !"_ZTS1C", tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial)
!11 = !MDBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
!12 = !{!13}
!13 = !MDSubprogram(name: "test_with_debug", linkageName: "test_with_debug", line: 6, isLocal: false, isDefinition: true, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !1, scope: !14, type: !15, function: void ()* @test_with_debug, variables: !17)
!14 = !MDFile(filename: "test.cpp", directory: "")
!15 = !MDSubroutineType(types: !16)
!16 = !{null}
!17 = !{!18, !19}
!18 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "c", line: 7, scope: !13, file: !14, type: !"_ZTS1C")
!19 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "lc", line: 8, scope: !13, file: !14, type: !11)
!20 = !{!21}
!21 = !MDGlobalVariable(name: "argc", line: 1, isLocal: false, isDefinition: true, scope: null, file: !14, type: !11, variable: i8* @argc)
!22 = !{i32 2, !"Dwarf Version", i32 4}
!23 = !{i32 2, !"Debug Info Version", i32 3}
!25 = !MDLocation(line: 8, column: 3, scope: !13)
!29 = !MDExpression()
|
