dbg-value-move.ll
7.02 KB
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
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
; RUN: llc < %s -print-machineinstrs 2>&1 | FileCheck %s
; CHECK: After WebAssembly Register Stackify:
; CHECK: bb.3.for.body.for.body_crit_edge:
; CHECK: [[REG:%[0-9]+]]:i32 = nsw ADD_I32 {{.*}} fib.c:7:7
; CHECK-NEXT: DBG_VALUE [[REG]]:i32, $noreg, !"a", {{.*}} fib.c:5:13
; CHECK: After WebAssembly Register Coloring:
; ModuleID = 'fib.bc'
; The test generated via: clang --target=wasm32-unknown-unknown-wasm fib.c -g -O2
; All lifetime markers and attributes were removed.
source_filename = "fib.c"
; void swap(int* a, int* b);
;
; __attribute__ ((visibility ("default")))
; int fib(int n) {
; int i, t, a = 0, b = 1;
; for (i = 0; i < n; i++) {
; a += b;
; swap(&a, &b);
; }
; return b;
; }
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown-wasm"
; Function Attrs: nounwind
define i32 @fib(i32 %n) local_unnamed_addr #0 !dbg !7 {
entry:
%a = alloca i32, align 4
%b = alloca i32, align 4
call void @llvm.dbg.value(metadata i32 %n, metadata !12, metadata !DIExpression()), !dbg !17
%0 = bitcast i32* %a to i8*, !dbg !18
call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !19
store i32 0, i32* %a, align 4, !dbg !19, !tbaa !20
%1 = bitcast i32* %b to i8*, !dbg !18
call void @llvm.dbg.value(metadata i32 1, metadata !16, metadata !DIExpression()), !dbg !24
store i32 1, i32* %b, align 4, !dbg !24, !tbaa !20
call void @llvm.dbg.value(metadata i32 0, metadata !13, metadata !DIExpression()), !dbg !25
%cmp4 = icmp sgt i32 %n, 0, !dbg !26
call void @llvm.dbg.value(metadata i32 1, metadata !16, metadata !DIExpression()), !dbg !24
br i1 %cmp4, label %for.body.preheader, label %for.end, !dbg !29
for.body.preheader: ; preds = %entry
call void @llvm.dbg.value(metadata i32 0, metadata !13, metadata !DIExpression()), !dbg !25
call void @llvm.dbg.value(metadata i32 0, metadata !15, metadata !DIExpression()), !dbg !19
call void @llvm.dbg.value(metadata i32 1, metadata !15, metadata !DIExpression()), !dbg !19
store i32 1, i32* %a, align 4, !dbg !30, !tbaa !20
call void @llvm.dbg.value(metadata i32* %a, metadata !15, metadata !DIExpression()), !dbg !19
call void @llvm.dbg.value(metadata i32* %b, metadata !16, metadata !DIExpression()), !dbg !24
call void @swap(i32* nonnull %a, i32* nonnull %b) #5, !dbg !32
call void @llvm.dbg.value(metadata i32 1, metadata !13, metadata !DIExpression()), !dbg !25
%2 = load i32, i32* %b, align 4, !dbg !33, !tbaa !20
call void @llvm.dbg.value(metadata i32 %2, metadata !16, metadata !DIExpression()), !dbg !24
%exitcond9 = icmp eq i32 %n, 1, !dbg !26
br i1 %exitcond9, label %for.end, label %for.body.for.body_crit_edge, !dbg !29, !llvm.loop !34
for.body.for.body_crit_edge: ; preds = %for.body.preheader, %for.body.for.body_crit_edge
%3 = phi i32 [ %4, %for.body.for.body_crit_edge ], [ %2, %for.body.preheader ]
%inc10 = phi i32 [ %inc, %for.body.for.body_crit_edge ], [ 1, %for.body.preheader ]
%.pre = load i32, i32* %a, align 4, !dbg !30, !tbaa !20
call void @llvm.dbg.value(metadata i32 %inc10, metadata !13, metadata !DIExpression()), !dbg !25
call void @llvm.dbg.value(metadata i32 %.pre, metadata !15, metadata !DIExpression()), !dbg !19
%add = add nsw i32 %.pre, %3, !dbg !30
call void @llvm.dbg.value(metadata i32 %add, metadata !15, metadata !DIExpression()), !dbg !19
store i32 %add, i32* %a, align 4, !dbg !30, !tbaa !20
call void @llvm.dbg.value(metadata i32* %a, metadata !15, metadata !DIExpression()), !dbg !19
call void @llvm.dbg.value(metadata i32* %b, metadata !16, metadata !DIExpression()), !dbg !24
call void @swap(i32* nonnull %a, i32* nonnull %b) #5, !dbg !32
%inc = add nuw nsw i32 %inc10, 1, !dbg !36
call void @llvm.dbg.value(metadata i32 %inc, metadata !13, metadata !DIExpression()), !dbg !25
%4 = load i32, i32* %b, align 4, !dbg !33, !tbaa !20
call void @llvm.dbg.value(metadata i32 %4, metadata !16, metadata !DIExpression()), !dbg !24
%exitcond = icmp eq i32 %inc, %n, !dbg !26
br i1 %exitcond, label %for.end, label %for.body.for.body_crit_edge, !dbg !29, !llvm.loop !34
for.end: ; preds = %for.body.for.body_crit_edge, %for.body.preheader, %entry
%.lcssa = phi i32 [ 1, %entry ], [ %2, %for.body.preheader ], [ %4, %for.body.for.body_crit_edge ]
ret i32 %.lcssa, !dbg !38
}
declare void @swap(i32*, i32*) local_unnamed_addr #2
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #4
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 (trunk 334610)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "fib.c", directory: "/d/y/llvmwasm")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{!"clang version 7.0.0 (trunk 334610)"}
!7 = distinct !DISubprogram(name: "fib", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
!8 = !DISubroutineType(types: !9)
!9 = !{!10, !10}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !{!12, !13, !14, !15, !16}
!12 = !DILocalVariable(name: "n", arg: 1, scope: !7, file: !1, line: 4, type: !10)
!13 = !DILocalVariable(name: "i", scope: !7, file: !1, line: 5, type: !10)
!14 = !DILocalVariable(name: "t", scope: !7, file: !1, line: 5, type: !10)
!15 = !DILocalVariable(name: "a", scope: !7, file: !1, line: 5, type: !10)
!16 = !DILocalVariable(name: "b", scope: !7, file: !1, line: 5, type: !10)
!17 = !DILocation(line: 4, column: 13, scope: !7)
!18 = !DILocation(line: 5, column: 3, scope: !7)
!19 = !DILocation(line: 5, column: 13, scope: !7)
!20 = !{!21, !21, i64 0}
!21 = !{!"int", !22, i64 0}
!22 = !{!"omnipotent char", !23, i64 0}
!23 = !{!"Simple C/C++ TBAA"}
!24 = !DILocation(line: 5, column: 20, scope: !7)
!25 = !DILocation(line: 5, column: 7, scope: !7)
!26 = !DILocation(line: 6, column: 17, scope: !27)
!27 = distinct !DILexicalBlock(scope: !28, file: !1, line: 6, column: 3)
!28 = distinct !DILexicalBlock(scope: !7, file: !1, line: 6, column: 3)
!29 = !DILocation(line: 6, column: 3, scope: !28)
!30 = !DILocation(line: 7, column: 7, scope: !31)
!31 = distinct !DILexicalBlock(scope: !27, file: !1, line: 6, column: 27)
!32 = !DILocation(line: 8, column: 5, scope: !31)
!33 = !DILocation(line: 0, scope: !7)
!34 = distinct !{!34, !29, !35}
!35 = !DILocation(line: 9, column: 3, scope: !28)
!36 = !DILocation(line: 6, column: 23, scope: !27)
!37 = !DILocation(line: 11, column: 1, scope: !7)
!38 = !DILocation(line: 10, column: 3, scope: !7)
!39 = distinct !DISubprogram(name: "_start", scope: !1, file: !1, line: 13, type: !40, isLocal: false, isDefinition: true, scopeLine: 13, isOptimized: true, unit: !0, retainedNodes: !2)
!40 = !DISubroutineType(types: !41)
!41 = !{null}
!42 = !DILocation(line: 13, column: 16, scope: !39)