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181 lines
8.5 KiB
181 lines
8.5 KiB
4 months ago
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# RUN: llc -debug-entry-values -run-pass=livedebugvalues -march=x86-64 -o - %s | FileCheck %s
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#
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# The test case was artificially adjusted, in order to make proper diamond basic
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# block structure relevant to the debug entry values clobbering.
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#
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# CHECK: ![[ARG_B:.*]] = !DILocalVariable(name: "b"
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# CHECK: bb.0.entry
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# CHECK: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression()
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# CHECK: bb.1.if.then
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# CHECK: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression()
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# CHECK: $ebx = MOV32rr $esi
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# CHECK-NEXT: DBG_VALUE $ebx, $noreg, ![[ARG_B]], !DIExpression()
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# CHECK-NEXT: $esi = MOV32ri 5
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# CHECK-NEXT: $ebx = MOV32ri 1
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# CHECK-NEXT: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression(DW_OP_LLVM_entry_value, 1)
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# CHECK: bb.2.if.else
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# CHECK: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression()
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# CHECK: $ebp = MOV32rr $esi
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# CHECK: DBG_VALUE $ebp, $noreg, ![[ARG_B]], !DIExpression()
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# CHECK-NEXT: $esi = MOV32ri 1
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# CHECK-NEXT: $ebp = MOV32ri 2
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# CHECK-NEXT: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression(DW_OP_LLVM_entry_value, 1)
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# CHECK: bb.3.if.end
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# CHECK-NOT: DBG_VALUE $esi, $noreg, ![[ARG_B]], !DIExpression(DW_OP_LLVM_entry_value, 1)
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#
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--- |
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; ModuleID = 'test.c'
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source_filename = "test.c"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: noinline nounwind uwtable
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define dso_local i32 @fn2(i32 %a, i32 %b, i32 %c) local_unnamed_addr !dbg !12 {
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entry:
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call void @llvm.dbg.value(metadata i32 %a, metadata !16, metadata !DIExpression()), !dbg !20
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call void @llvm.dbg.value(metadata i32 %b, metadata !17, metadata !DIExpression()), !dbg !20
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call void @llvm.dbg.value(metadata i32 %c, metadata !18, metadata !DIExpression()), !dbg !20
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%add = add nsw i32 %a, 2, !dbg !21
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call void @llvm.dbg.value(metadata i32 %add, metadata !19, metadata !DIExpression()), !dbg !20
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tail call void @fn1(i32 5, i32 6, i32 %add), !dbg !22
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%cmp = icmp slt i32 %b, 17, !dbg !23
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br i1 %cmp, label %if.then, label %if.else, !dbg !25
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if.then: ; preds = %entry
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%add1 = add nsw i32 %b, 7, !dbg !26
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call void @llvm.dbg.value(metadata i32 %add1, metadata !17, metadata !DIExpression()), !dbg !20
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tail call void @fn1(i32 5, i32 %add1, i32 %c), !dbg !28
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br label %if.end, !dbg !29
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if.else: ; preds = %entry
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%add2 = add nuw nsw i32 %b, 1, !dbg !30
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call void @llvm.dbg.value(metadata i32 %add2, metadata !17, metadata !DIExpression()), !dbg !20
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tail call void @fn1(i32 1, i32 %add2, i32 %c), !dbg !32
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%b.addr.0 = phi i32 [ %add1, %if.then ], [ %add2, %if.else ], !dbg !33
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call void @llvm.dbg.value(metadata i32 %b.addr.0, metadata !17, metadata !DIExpression()), !dbg !20
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ret i32 %b.addr.0, !dbg !34
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}
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declare !dbg !4 dso_local void @fn1(i32, i32, i32) local_unnamed_addr
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!8, !9, !10}
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!llvm.ident = !{!11}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/dir")
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!2 = !{}
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!3 = !{!4}
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!4 = !DISubprogram(name: "fn1", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null, !7, !7, !7}
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!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!8 = !{i32 2, !"Dwarf Version", i32 4}
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!9 = !{i32 2, !"Debug Info Version", i32 3}
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!10 = !{i32 1, !"wchar_size", i32 4}
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!11 = !{!"clang version 10.0.0"}
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!12 = distinct !DISubprogram(name: "fn2", scope: !1, file: !1, line: 5, type: !13, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15)
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!13 = !DISubroutineType(types: !14)
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!14 = !{!7, !7, !7, !7}
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!15 = !{!16, !17, !18, !19}
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!16 = !DILocalVariable(name: "a", arg: 1, scope: !12, file: !1, line: 5, type: !7)
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!17 = !DILocalVariable(name: "b", arg: 2, scope: !12, file: !1, line: 5, type: !7)
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!18 = !DILocalVariable(name: "c", arg: 3, scope: !12, file: !1, line: 5, type: !7)
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!19 = !DILocalVariable(name: "q", scope: !12, file: !1, line: 7, type: !7)
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!20 = !DILocation(line: 0, scope: !12)
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!21 = !DILocation(line: 7, column: 15, scope: !12)
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!22 = !DILocation(line: 9, column: 5, scope: !12)
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!23 = !DILocation(line: 11, column: 11, scope: !24)
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!24 = distinct !DILexicalBlock(scope: !12, file: !1, line: 11, column: 9)
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!25 = !DILocation(line: 11, column: 9, scope: !12)
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!26 = !DILocation(line: 12, column: 13, scope: !27)
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!27 = distinct !DILexicalBlock(scope: !24, file: !1, line: 11, column: 17)
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!28 = !DILocation(line: 13, column: 8, scope: !27)
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!29 = !DILocation(line: 14, column: 5, scope: !27)
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!30 = !DILocation(line: 15, column: 13, scope: !31)
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!31 = distinct !DILexicalBlock(scope: !24, file: !1, line: 14, column: 12)
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!32 = !DILocation(line: 16, column: 7, scope: !31)
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!33 = !DILocation(line: 0, scope: !24)
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!34 = !DILocation(line: 19, column: 5, scope: !12)
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...
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---
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name: fn2
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alignment: 16
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fixedStack:
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- { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default,
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callee-saved-register: '$rbx', callee-saved-restored: true, debug-info-variable: '',
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debug-info-expression: '', debug-info-location: '' }
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- { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default,
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callee-saved-register: '$rbp', callee-saved-restored: true, debug-info-variable: '',
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debug-info-expression: '', debug-info-location: '' }
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body: |
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bb.0.entry:
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successors: %bb.1(0x40000000), %bb.2(0x40000000)
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liveins: $edi, $edx, $esi, $rbp, $rbx
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DBG_VALUE $edi, $noreg, !16, !DIExpression(), debug-location !20
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DBG_VALUE $esi, $noreg, !17, !DIExpression(), debug-location !20
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DBG_VALUE $edx, $noreg, !18, !DIExpression(), debug-location !20
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frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
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CFI_INSTRUCTION def_cfa_offset 16
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frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
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CFI_INSTRUCTION def_cfa_offset 24
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frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
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CFI_INSTRUCTION def_cfa_offset 32
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CFI_INSTRUCTION offset $rbx, -24
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CFI_INSTRUCTION offset $rbp, -16
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$ebp = MOV32rr $edx
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DBG_VALUE $ebp, $noreg, !18, !DIExpression(), debug-location !20
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renamable $edi = KILL $edi, implicit-def $rdi
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DBG_VALUE $edi, $noreg, !16, !DIExpression(), debug-location !20
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renamable $edx = LEA64_32r killed renamable $rdi, 1, $noreg, 2, $noreg, debug-location !21
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DBG_VALUE $edx, $noreg, !19, !DIExpression(), debug-location !20
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$edi = MOV32ri 5, debug-location !22
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CMP32ri8 renamable $ebp, 16, implicit-def $eflags, debug-location !23
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JCC_1 %bb.2, 15, implicit killed $eflags, debug-location !25
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bb.1.if.then:
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successors: %bb.3(0x80000000)
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liveins: $ebp, $ebx, $esi
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$ebx = MOV32rr $esi
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DBG_VALUE $ebx, $noreg, !17, !DIExpression(), debug-location !20
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$esi = MOV32ri 5, debug-location !28
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$ebx = MOV32ri 1
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JMP_1 %bb.3
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bb.2.if.else:
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successors: %bb.3(0x80000000)
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liveins: $ebp, $ebx, $esi
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$ebp = MOV32rr $esi
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DBG_VALUE $ebp, $noreg, !17, !DIExpression(), debug-location !20
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$esi = MOV32ri 1, debug-location !32
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$ebp = MOV32ri 2
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bb.3.if.end:
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liveins: $ebx, $edi, $ebp
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$esi = MOV32rr $ebx, debug-location !33
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$edx = MOV32rr killed $ebp, debug-location !33
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CALL64pcrel32 @fn1, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit $esi, implicit $edx, implicit-def $rsp, implicit-def $ssp, debug-location !33
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DBG_VALUE $ebx, $noreg, !17, !DIExpression(), debug-location !20
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$eax = MOV32rr killed $ebx, debug-location !34
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$rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !34
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CFI_INSTRUCTION def_cfa_offset 24, debug-location !34
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$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !34
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CFI_INSTRUCTION def_cfa_offset 16, debug-location !34
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$rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !34
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CFI_INSTRUCTION def_cfa_offset 8, debug-location !34
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RETQ killed $eax, debug-location !34
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...
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