1 # RUN: llc -run-pass=livedebugvalues %s -o - | FileCheck %s
3 # This test tests tracking variables value transferring from one register to another.
4 # This example is altered additionally in order to test transferring from one float register
5 # to another. The altered instructions are labeled below.
7 # CHECK: ![[ARG1:.*]] = !DILocalVariable(name: "arg1"
8 # CHECK: DBG_VALUE $ebx, $noreg, ![[ARG1]], !DIExpression(), debug-location
9 # CHECK: $r12d = MOV32rr killed $ebx, implicit-def $r12
10 # CHECK-NEXT: DBG_VALUE $r12d, $noreg, ![[ARG1]], !DIExpression(), debug-location
12 ; ModuleID = 'live-debug-values-reg-copy.ll'
13 source_filename = "live-debug-values-reg-copy.c"
14 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
15 target triple = "x86_64-unknown-linux-gnu"
17 define dso_local i32 @foo(i32 %arg1) local_unnamed_addr !dbg !7 {
19 %local1 = alloca i32, align 4
20 call void @llvm.dbg.value(metadata i32 %arg1, metadata !12, metadata !DIExpression()), !dbg !15
21 %0 = bitcast i32* %local1 to i8*, !dbg !15
22 call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !15
23 call void @init(i32* nonnull %local1), !dbg !15
24 %1 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
25 %add = add nsw i32 %1, %arg1, !dbg !15
26 %call = call i32 @coeficient(i32 %add), !dbg !15
27 %cmp = icmp sgt i32 %call, 32, !dbg !15
28 br i1 %cmp, label %if.then, label %if.else, !dbg !15
30 if.then: ; preds = %entry
31 %call1 = call i32 @externFunc(i32 %arg1), !dbg !15
32 %2 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
33 %add2 = add nsw i32 %2, %call1, !dbg !15
34 br label %if.end, !dbg !15
36 if.else: ; preds = %entry
37 %call3 = call i32 @externFunc2(i32 %arg1), !dbg !15
38 %3 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
39 %add4 = add nsw i32 %3, %call3, !dbg !15
42 if.end: ; preds = %if.else, %if.then
43 %storemerge = phi i32 [ %add4, %if.else ], [ %add2, %if.then ]
44 %4 = bitcast i32* %local1 to i8*
45 %mul = shl nsw i32 %arg1, 2, !dbg !15
46 %add5 = add nsw i32 %storemerge, %mul, !dbg !15
47 %mul6 = mul nsw i32 %add5, %call, !dbg !15
48 call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %4), !dbg !15
49 ret i32 %mul6, !dbg !15
52 ; Function Attrs: argmemonly nounwind
53 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #0
55 declare dso_local void @init(i32*) local_unnamed_addr
57 declare dso_local i32 @coeficient(i32) local_unnamed_addr
59 declare dso_local i32 @externFunc(i32) local_unnamed_addr
61 declare dso_local i32 @externFunc2(i32) local_unnamed_addr
63 ; Function Attrs: argmemonly nounwind
64 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #0
66 ; Function Attrs: nounwind readnone speculatable
67 declare void @llvm.dbg.value(metadata, metadata, metadata) #1
69 ; Function Attrs: nounwind
70 declare void @llvm.stackprotector(i8*, i8**) #2
72 attributes #0 = { argmemonly nounwind }
73 attributes #1 = { nounwind readnone speculatable }
74 attributes #2 = { nounwind }
77 !llvm.module.flags = !{!3, !4, !5}
80 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
81 !1 = !DIFile(filename: "live-debug-values-reg-copy.c", directory: "/")
83 !3 = !{i32 2, !"Dwarf Version", i32 4}
84 !4 = !{i32 2, !"Debug Info Version", i32 3}
85 !5 = !{i32 1, !"wchar_size", i32 4}
86 !6 = !{!"clang version 7.0.0 "}
87 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 6, type: !8, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
88 !8 = !DISubroutineType(types: !9)
90 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
92 !12 = !DILocalVariable(name: "arg1", arg: 1, scope: !7, file: !1, line: 6, type: !10)
93 !15 = !DILocation(line: 6, column: 13, scope: !7)
94 !20 = !{!21, !21, i64 0}
95 !21 = !{!"int", !22, i64 0}
96 !22 = !{!"omnipotent char", !23, i64 0}
97 !23 = !{!"Simple C/C++ TBAA"}
103 exposesReturnsTwice: false
105 regBankSelected: false
107 tracksRegLiveness: true
110 - { reg: '$edi', virtual-reg: '' }
112 isFrameAddressTaken: false
113 isReturnAddressTaken: false
123 hasOpaqueSPAdjustment: false
125 hasMustTailInVarArgFunc: false
129 - { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default,
130 callee-saved-register: '$rbx', callee-saved-restored: true }
131 - { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default,
132 callee-saved-register: '$rbp', callee-saved-restored: true }
134 - { id: 0, name: local1, type: default, offset: -28, size: 4, alignment: 4,
135 stack-id: default, callee-saved-register: '', callee-saved-restored: true,
136 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
140 successors: %bb.1(0x40000000), %bb.2(0x40000000)
141 liveins: $edi, $rbp, $rbx
143 frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
144 CFI_INSTRUCTION def_cfa_offset 16
145 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
146 CFI_INSTRUCTION def_cfa_offset 24
147 frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
148 CFI_INSTRUCTION def_cfa_offset 32
149 CFI_INSTRUCTION offset $rbx, -24
150 CFI_INSTRUCTION offset $rbp, -16
151 DBG_VALUE $edi, $noreg, !12, !DIExpression(), debug-location !15
152 $ebx = MOV32rr $edi, implicit-def $rbx
153 DBG_VALUE $ebx, $noreg, !12, !DIExpression(), debug-location !15
154 renamable $rdi = LEA64r $rsp, 1, $noreg, 4, $noreg
155 CALL64pcrel32 @init, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, debug-location !15
156 renamable $edi = MOV32rm $rsp, 1, $noreg, 4, $noreg :: (dereferenceable load 4 from %ir.local1, !tbaa !20)
157 renamable $edi = ADD32rr killed renamable $edi, renamable $ebx, implicit-def dead $eflags, debug-location !15
158 CALL64pcrel32 @coeficient, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
159 $ebp = MOV32rr $eax, debug-location !15
160 $edi = MOV32rr $ebx, debug-location !15
161 CMP32ri8 renamable $ebp, 33, implicit-def $eflags, debug-location !15
162 JCC_1 %bb.2, 12, implicit killed $eflags, debug-location !15
165 successors: %bb.3(0x80000000)
168 CALL64pcrel32 @externFunc, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
172 successors: %bb.3(0x80000000)
175 CALL64pcrel32 @externFunc2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
178 liveins: $ebp, $ebx, $eax
179 ; Instruction below is added in order to test moving variable's value from one register to another.
180 $r12d = MOV32rr killed $ebx, implicit-def $r12
181 renamable $eax = KILL $eax, implicit-def $rax
182 renamable $eax = ADD32rm renamable $eax, $rsp, 1, $noreg, 4, $noreg, implicit-def dead $eflags, implicit killed $rax, implicit-def $rax :: (dereferenceable load 4 from %ir.local1, !tbaa !20)
183 renamable $eax = LEA64_32r killed renamable $rax, 4, killed renamable $r12, 0, $noreg, debug-location !15
184 renamable $eax = IMUL32rr killed renamable $eax, killed renamable $ebp, implicit-def dead $eflags, debug-location !15
185 $rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !15
186 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
187 $rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
188 RETQ $eax, debug-location !15