test/DebugInfo/X86/location-range-inlined-xblock.mir

# RUN: llc -start-after=livedebugvalues --filetype=obj %s -o - \
# RUN:   | llvm-dwarfdump -v --name local - \
# RUN:   | FileCheck %s
#
## Generated with opt -inline -mem2reg, llc -stop-after=livedebugvalues from:
## int glob;
## int ext1(int);
## int ext2(int);
##
## __attribute__((always_inline))
## static int inline_me() {
##   int local = glob;
##   int r = 0;
##   if (local)
##     r = ext1(local);
##   else
##     r = ext2(local);
##   return r * local;
## }
##
## int fun(int p) {
##   glob = p;
##   glob = inline_me();
##   return 0;
## }
##
## Check that the location for inlined variable 'local' (RBX), which spans
## multiple basic blocks, is given a single location.
#
# CHECK:      DW_AT_location [DW_FORM_exprloc] (DW_OP_reg3 RBX)
# CHECK-NEXT: DW_AT_abstract_origin [DW_FORM_ref4] ({{.*}}"local")

--- |
  target triple = "x86_64-unknown-linux-gnu"

  @glob = dso_local global i32 0, align 4, !dbg !0

  define dso_local i32 @_Z3funi(i32 %p) !dbg !11 {
  entry:
    call void @llvm.dbg.value(metadata i32 %p, metadata !15, metadata !DIExpression()), !dbg !16
    store i32 %p, i32* @glob, align 4, !dbg !17
    %0 = load i32, i32* @glob, align 4, !dbg !22
    call void @llvm.dbg.value(metadata i32 %0, metadata !27, metadata !DIExpression()), !dbg !30
    call void @llvm.dbg.value(metadata i32 0, metadata !28, metadata !DIExpression()), !dbg !30
    %tobool.i = icmp ne i32 %0, 0, !dbg !31
    br i1 %tobool.i, label %if.then.i, label %if.else.i, !dbg !33

  if.then.i:                                        ; preds = %entry
    %call.i = call i32 @_Z4ext1i(i32 %0), !dbg !34
    call void @llvm.dbg.value(metadata i32 %call.i, metadata !28, metadata !DIExpression()), !dbg !30
    br label %_ZL9inline_mev.exit, !dbg !35

  if.else.i:                                        ; preds = %entry
    %call1.i = call i32 @_Z4ext2i(i32 %0), !dbg !36
    call void @llvm.dbg.value(metadata i32 %call1.i, metadata !28, metadata !DIExpression()), !dbg !30
    br label %_ZL9inline_mev.exit

  _ZL9inline_mev.exit:                              ; preds = %if.else.i, %if.then.i
    %r.0.i = phi i32 [ %call.i, %if.then.i ], [ %call1.i, %if.else.i ], !dbg !37
    call void @llvm.dbg.value(metadata i32 %r.0.i, metadata !28, metadata !DIExpression()), !dbg !30
    %mul.i = mul nsw i32 %r.0.i, %0, !dbg !38
    store i32 %mul.i, i32* @glob, align 4, !dbg !39
    ret i32 0, !dbg !40
  }

  declare !dbg !41 dso_local i32 @_Z4ext1i(i32)
  declare !dbg !42 dso_local i32 @_Z4ext2i(i32)
  declare void @llvm.dbg.value(metadata, metadata, metadata)

  !llvm.dbg.cu = !{!2}
  !llvm.module.flags = !{!7, !8, !9}
  !llvm.ident = !{!10}

  !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
  !1 = distinct !DIGlobalVariable(name: "glob", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
  !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !3, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)
  !3 = !DIFile(filename: "test.cpp", directory: "/")
  !4 = !{}
  !5 = !{!0}
  !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  !7 = !{i32 7, !"Dwarf Version", i32 4}
  !8 = !{i32 2, !"Debug Info Version", i32 3}
  !9 = !{i32 1, !"wchar_size", i32 4}
  !10 = !{!"clang version 12.0.0"}
  !11 = distinct !DISubprogram(name: "fun", linkageName: "_Z3funi", scope: !3, file: !3, line: 16, type: !12, scopeLine: 16, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !14)
  !12 = !DISubroutineType(types: !13)
  !13 = !{!6, !6}
  !14 = !{!15}
  !15 = !DILocalVariable(name: "p", arg: 1, scope: !11, file: !3, line: 16, type: !6)
  !16 = !DILocation(line: 0, scope: !11)
  !17 = !DILocation(line: 17, column: 8, scope: !11)
  !22 = !DILocation(line: 7, column: 15, scope: !23, inlinedAt: !29)
  !23 = distinct !DISubprogram(name: "inline_me", linkageName: "_ZL9inline_mev", scope: !3, file: !3, line: 6, type: !24, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !26)
  !24 = !DISubroutineType(types: !25)
  !25 = !{!6}
  !26 = !{!27, !28}
  !27 = !DILocalVariable(name: "local", scope: !23, file: !3, line: 7, type: !6)
  !28 = !DILocalVariable(name: "r", scope: !23, file: !3, line: 8, type: !6)
  !29 = distinct !DILocation(line: 18, column: 10, scope: !11)
  !30 = !DILocation(line: 0, scope: !23, inlinedAt: !29)
  !31 = !DILocation(line: 9, column: 7, scope: !32, inlinedAt: !29)
  !32 = distinct !DILexicalBlock(scope: !23, file: !3, line: 9, column: 7)
  !33 = !DILocation(line: 9, column: 7, scope: !23, inlinedAt: !29)
  !34 = !DILocation(line: 10, column: 9, scope: !32, inlinedAt: !29)
  !35 = !DILocation(line: 10, column: 5, scope: !32, inlinedAt: !29)
  !36 = !DILocation(line: 12, column: 9, scope: !32, inlinedAt: !29)
  !37 = !DILocation(line: 0, scope: !32, inlinedAt: !29)
  !38 = !DILocation(line: 13, column: 12, scope: !23, inlinedAt: !29)
  !39 = !DILocation(line: 18, column: 8, scope: !11)
  !40 = !DILocation(line: 19, column: 3, scope: !11)
  !41 = !DISubprogram(name: "ext1", linkageName: "_Z4ext1i", scope: !3, file: !3, line: 2, type: !12, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !4)
  !42 = !DISubprogram(name: "ext2", linkageName: "_Z4ext2i", scope: !3, file: !3, line: 3, type: !12, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !4)

...
---
name:            _Z3funi
body:             |
  bb.0.entry:
    successors: %bb.1(0x50000000), %bb.2(0x30000000)
    liveins: $edi, $rbx

    DBG_VALUE $edi, $noreg, !15, !DIExpression(), debug-location !16
    frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
    CFI_INSTRUCTION def_cfa_offset 16
    CFI_INSTRUCTION offset $rbx, -16
    $ebx = MOV32rr $edi
    DBG_VALUE $ebx, $noreg, !15, !DIExpression(), debug-location !16
    MOV32mr $rip, 1, $noreg, @glob, $noreg, $edi, debug-location !17 :: (store 4 into @glob)
    DBG_VALUE $ebx, $noreg, !27, !DIExpression(), debug-location !30
    DBG_VALUE 0, $noreg, !28, !DIExpression(), debug-location !30
    TEST32rr $edi, $edi, implicit-def $eflags, debug-location !31
    JCC_1 %bb.2, 4, implicit killed $eflags, debug-location !33

  bb.1.if.then.i:
    successors: %bb.3(0x80000000)
    liveins: $ebx

    DBG_VALUE $ebx, $noreg, !27, !DIExpression(), debug-location !30
    DBG_VALUE $ebx, $noreg, !15, !DIExpression(), debug-location !16
    DBG_VALUE 0, $noreg, !28, !DIExpression(), debug-location !30
    $edi = MOV32rr $ebx, debug-location !34
    CALL64pcrel32 @_Z4ext1i, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !34
    DBG_VALUE $eax, $noreg, !28, !DIExpression(), debug-location !30
    JMP_1 %bb.3

  bb.2.if.else.i:
    successors: %bb.3(0x80000000)
    liveins: $ebx

    DBG_VALUE $ebx, $noreg, !27, !DIExpression(), debug-location !30
    DBG_VALUE $ebx, $noreg, !15, !DIExpression(), debug-location !16
    DBG_VALUE 0, $noreg, !28, !DIExpression(), debug-location !30
    $edi = MOV32rr $ebx, debug-location !36
    CALL64pcrel32 @_Z4ext2i, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !36
    DBG_VALUE $eax, $noreg, !28, !DIExpression(), debug-location !30

  bb.3._ZL9inline_mev.exit:
    liveins: $eax, $ebx

    DBG_VALUE $ebx, $noreg, !27, !DIExpression(), debug-location !30
    DBG_VALUE $ebx, $noreg, !15, !DIExpression(), debug-location !16
    DBG_VALUE $eax, $noreg, !28, !DIExpression(), debug-location !30
    DBG_VALUE $eax, $noreg, !28, !DIExpression(), debug-location !30
    renamable $eax = nsw IMUL32rr killed renamable $eax, killed renamable $ebx, implicit-def dead $eflags, debug-location !38
    MOV32mr $rip, 1, $noreg, @glob, $noreg, killed renamable $eax, debug-location !39 :: (store 4 into @glob)
    $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, debug-location !40
    $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !40
    DBG_VALUE $edi, $noreg, !15, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !16
    CFI_INSTRUCTION def_cfa_offset 8, debug-location !40
    RETQ $eax, debug-location !40

...