1 ; RUN: opt < %s -debug-only=loop-vectorize -passes=loop-vectorize -mtriple=x86_64-unknown-linux -S 2>&1 | FileCheck %s
4 ; Test that the register usage estimation is not affected by the presence of
7 ; In the test below the values %0 and %r.08 are ended in the add instruction
8 ; preceding the call to the intrinsic, and will be recorded against the index
9 ; of the call instruction. This means the debug intrinsic must be considered
10 ; when erasing instructions from the list of open-intervals.
12 ; Tests generated from following source (with and without -g):
14 ; unsigned test(unsigned *a, unsigned n) {
16 ; for(i = 0; i < n; i++)
21 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
22 target triple = "x86_64-unknown-linux-gnu"
24 ; CHECK: LV: Checking a loop in 'test_g'
25 ; CHECK: LV(REG): Found max usage: 2 item
26 ; CHECK-NEXT: LV(REG): RegisterClass: Generic::ScalarRC, 2 registers
27 ; CHECK-NEXT: LV(REG): RegisterClass: Generic::VectorRC, 2 registers
28 ; CHECK-NEXT: LV(REG): Found invariant usage: 1 item
29 ; CHECK-NEXT: LV(REG): RegisterClass: Generic::ScalarRC, 1 registers
31 define i32 @test_g(ptr nocapture readonly %a, i32 %n) local_unnamed_addr !dbg !6 {
33 tail call void @llvm.dbg.value(metadata ptr %a, i64 0, metadata !12, metadata !16), !dbg !17
34 tail call void @llvm.dbg.value(metadata i32 %n, i64 0, metadata !13, metadata !16), !dbg !18
35 tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !15, metadata !16), !dbg !19
36 tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !14, metadata !16), !dbg !20
37 tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !15, metadata !16), !dbg !19
38 tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !14, metadata !16), !dbg !20
39 %cmp6 = icmp eq i32 %n, 0, !dbg !21
40 br i1 %cmp6, label %for.end, label %for.body.preheader, !dbg !25
42 for.body.preheader: ; preds = %entry
43 %wide.trip.count = zext i32 %n to i64, !dbg !21
44 br label %for.body, !dbg !27
46 for.body: ; preds = %for.body.preheader, %for.body
47 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
48 %r.08 = phi i32 [ %add, %for.body ], [ 0, %for.body.preheader ]
49 %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv, !dbg !27
50 %0 = load i32, ptr %arrayidx, align 4, !dbg !27, !tbaa !28
51 %add = add i32 %0, %r.08, !dbg !32
52 tail call void @llvm.dbg.value(metadata i32 %add, i64 0, metadata !15, metadata !16), !dbg !19
53 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !33
54 tail call void @llvm.dbg.value(metadata i32 %add, i64 0, metadata !15, metadata !16), !dbg !19
55 %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count, !dbg !21
56 br i1 %exitcond, label %for.end.loopexit, label %for.body, !dbg !25, !llvm.loop !35
58 for.end.loopexit: ; preds = %for.body
59 br label %for.end, !dbg !38
61 for.end: ; preds = %for.end.loopexit, %entry
62 %r.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.end.loopexit ]
63 ret i32 %r.0.lcssa, !dbg !38
66 ; CHECK: LV: Checking a loop in 'test'
67 ; CHECK: LV(REG): Found max usage: 2 item
68 ; CHECK-NEXT: LV(REG): RegisterClass: Generic::ScalarRC, 2 registers
69 ; CHECK-NEXT: LV(REG): RegisterClass: Generic::VectorRC, 2 registers
70 ; CHECK-NEXT: LV(REG): Found invariant usage: 1 item
71 ; CHECK-NEXT: LV(REG): RegisterClass: Generic::ScalarRC, 1 registers
73 define i32 @test(ptr nocapture readonly %a, i32 %n) local_unnamed_addr {
75 %cmp6 = icmp eq i32 %n, 0
76 br i1 %cmp6, label %for.end, label %for.body.preheader
78 for.body.preheader: ; preds = %entry
79 %wide.trip.count = zext i32 %n to i64
82 for.body: ; preds = %for.body.preheader, %for.body
83 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
84 %r.08 = phi i32 [ %add, %for.body ], [ 0, %for.body.preheader ]
85 %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
86 %0 = load i32, ptr %arrayidx, align 4, !tbaa !28
87 %add = add i32 %0, %r.08
88 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
89 %exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
90 br i1 %exitcond, label %for.end.loopexit, label %for.body
92 for.end.loopexit: ; preds = %for.body
95 for.end: ; preds = %for.end.loopexit, %entry
96 %r.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.end.loopexit ]
100 declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
103 !llvm.module.flags = !{!3, !4}
105 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
106 !1 = !DIFile(filename: "test.c", directory: "")
108 !3 = !{i32 2, !"Dwarf Version", i32 4}
109 !4 = !{i32 2, !"Debug Info Version", i32 3}
110 !6 = distinct !DISubprogram(name: "test_g", scope: !1, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
111 !7 = !DISubroutineType(types: !8)
113 !9 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
114 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64)
115 !11 = !{!12, !13, !14, !15}
116 !12 = !DILocalVariable(name: "a", arg: 1, scope: !6, file: !1, line: 1, type: !10)
117 !13 = !DILocalVariable(name: "n", arg: 2, scope: !6, file: !1, line: 1, type: !9)
118 !14 = !DILocalVariable(name: "i", scope: !6, file: !1, line: 2, type: !9)
119 !15 = !DILocalVariable(name: "r", scope: !6, file: !1, line: 2, type: !9)
120 !16 = !DIExpression()
121 !17 = !DILocation(line: 1, column: 27, scope: !6)
122 !18 = !DILocation(line: 1, column: 39, scope: !6)
123 !19 = !DILocation(line: 2, column: 15, scope: !6)
124 !20 = !DILocation(line: 2, column: 12, scope: !6)
125 !21 = !DILocation(line: 3, column: 16, scope: !22)
126 !22 = !DILexicalBlockFile(scope: !23, file: !1, discriminator: 1)
127 !23 = distinct !DILexicalBlock(scope: !24, file: !1, line: 3, column: 3)
128 !24 = distinct !DILexicalBlock(scope: !6, file: !1, line: 3, column: 3)
129 !25 = !DILocation(line: 3, column: 3, scope: !26)
130 !26 = !DILexicalBlockFile(scope: !24, file: !1, discriminator: 1)
131 !27 = !DILocation(line: 4, column: 10, scope: !23)
132 !28 = !{!29, !29, i64 0}
133 !29 = !{!"int", !30, i64 0}
134 !30 = !{!"omnipotent char", !31, i64 0}
135 !31 = !{!"Simple C/C++ TBAA"}
136 !32 = !DILocation(line: 4, column: 7, scope: !23)
137 !33 = !DILocation(line: 3, column: 22, scope: !34)
138 !34 = !DILexicalBlockFile(scope: !23, file: !1, discriminator: 2)
139 !35 = distinct !{!35, !36, !37}
140 !36 = !DILocation(line: 3, column: 3, scope: !24)
141 !37 = !DILocation(line: 4, column: 13, scope: !24)
142 !38 = !DILocation(line: 5, column: 3, scope: !6)