1 ; RUN: llc < %s -stop-after=virtregrewriter -o - | FileCheck %s
3 ; Generated with "clang++ -g -O1 -S -emit-llvm"
5 ; inline bool bar(char c) {
6 ; return c >= '0' && c <= '9';
9 ; unsigned foo(const char* data,
11 ; int* parsing_result) {
16 ; while (bar(*data)) {
26 ; if (length == 0 || value) {
33 ; *parsing_result = result;
34 ; return result == 0 ? value : 0;
38 ; CHECK: bye.thread21:
39 ; CHECK: DBG_LABEL !14
41 ; CHECK: DBG_LABEL !14
42 ; CHECK-NOT: DBG_LABEL !14
46 ; Function Attrs: nounwind uwtable
47 define dso_local i32 @_Z3fooPKciPi(i8* nocapture readonly %data, i32 %length, i32* nocapture %parsing_result) local_unnamed_addr !dbg !4 {
49 %0 = load i8, i8* %data, align 1
50 %call23 = tail call zeroext i1 @_Z3barc(i8 signext %0), !dbg !15
51 br i1 %call23, label %while.body, label %while.end
53 while.body: ; preds = %entry, %while.body
54 %overflow.026 = phi i8 [ %spec.select18, %while.body ], [ 0, %entry ]
55 %result.025 = phi i32 [ %spec.select, %while.body ], [ 1, %entry ]
56 %value.024 = phi i32 [ %value.1, %while.body ], [ 0, %entry ]
57 %cmp = icmp ugt i32 %value.024, 1
58 %spec.select = select i1 %cmp, i32 2, i32 %result.025
59 %spec.select18 = select i1 %cmp, i8 1, i8 %overflow.026
60 %1 = and i8 %spec.select18, 1
62 %3 = zext i8 %2 to i32
63 %value.1 = add i32 %value.024, %3
64 %4 = load i8, i8* %data, align 1
65 %call = tail call zeroext i1 @_Z3barc(i8 signext %4), !dbg !15
66 br i1 %call, label %while.body, label %while.end.loopexit
68 while.end.loopexit: ; preds = %while.body
69 %phitmp = and i8 %spec.select18, 1
72 while.end: ; preds = %while.end.loopexit, %entry
73 %value.0.lcssa = phi i32 [ 0, %entry ], [ %value.1, %while.end.loopexit ]
74 %result.0.lcssa = phi i32 [ 1, %entry ], [ %spec.select, %while.end.loopexit ]
75 %overflow.0.lcssa = phi i8 [ 0, %entry ], [ %phitmp, %while.end.loopexit ]
76 %cmp3 = icmp eq i32 %length, 0
77 %tobool4 = icmp ne i32 %value.0.lcssa, 0
78 %or.cond = or i1 %cmp3, %tobool4
79 br i1 %or.cond, label %if.then5, label %bye.thread21
81 bye.thread21: ; preds = %while.end
82 call void @llvm.dbg.label(metadata !14), !dbg !16
83 store i32 1, i32* %parsing_result, align 4
86 if.then5: ; preds = %while.end
87 %tobool6 = icmp eq i8 %overflow.0.lcssa, 0
88 call void @llvm.dbg.label(metadata !14), !dbg !16
89 call void @llvm.dbg.label(metadata !14), !dbg !16
90 br i1 %tobool6, label %bye.thread, label %bye
92 bye.thread: ; preds = %if.then5
93 store i32 0, i32* %parsing_result, align 4
96 bye: ; preds = %if.then5
97 store i32 %result.0.lcssa, i32* %parsing_result, align 4
98 %cmp10 = icmp eq i32 %result.0.lcssa, 0
99 br i1 %cmp10, label %5, label %6
101 ; <label>:5: ; preds = %bye.thread, %bye
104 ; <label>:6: ; preds = %bye.thread21, %bye, %5
105 %7 = phi i32 [ %value.0.lcssa, %5 ], [ 0, %bye ], [ 0, %bye.thread21 ]
109 ; Function Attrs: inlinehint nounwind uwtable
110 define linkonce_odr dso_local zeroext i1 @_Z3barc(i8 signext %c) local_unnamed_addr comdat {
112 %c.off = add i8 %c, -48
113 %0 = icmp ult i8 %c.off, 10
117 ; Function Attrs: nounwind readnone speculatable
118 declare void @llvm.dbg.label(metadata) #0
120 attributes #0 = { nounwind readnone speculatable }
123 !llvm.module.flags = !{!3}
125 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
126 !1 = !DIFile(filename: "live-debug-label.cc", directory: ".")
128 !3 = !{i32 2, !"Debug Info Version", i32 3}
129 !4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooPKciPi", scope: !1, file: !1, line: 5, type: !5, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !13)
130 !5 = !DISubroutineType(types: !6)
131 !6 = !{!7, !8, !11, !12}
132 !7 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
133 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64)
134 !9 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !10)
135 !10 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
136 !11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
137 !12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)
139 !14 = !DILabel(scope: !4, name: "bye", file: !1, line: 28)
140 !15 = !DILocation(line: 12, column: 10, scope: !4)
141 !16 = !DILocation(line: 28, column: 1, scope: !4)