test/DebugInfo/MIR/X86/dbginfo-entryvals.mir

# RUN: llc -run-pass=livedebugvalues -verify-machineinstrs -march=x86-64 -o - %s | FileCheck %s
#
#extern void fn2(int);
#
#__attribute__((noinline))
#void
#fn1 (int x, int y) {
#  int u = x + y;
#  if (x > 1)
#    u += 1;
#  else
#    u += 2;
#  int a = 7;
#  fn2 (a);
#  u --;
#}
# CHECK: DBG_VALUE $edi, $noreg, !14, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location {{.*}}
# CHECK-NOT: DBG_VALUE $esi, $noreg, !15, !DIExpression(DW_OP_LLVM_entry_value, 1)

--- |
  ; ModuleID = 'test.c'
  source_filename = "test.c"
  target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
  
  ; Function Attrs: noinline nounwind uwtable
  define dso_local void @fn1(i32 %x, i32 %y) local_unnamed_addr !dbg !9 {
  entry:
    call void @llvm.dbg.value(metadata i32 %x, metadata !14, metadata !DIExpression()), !dbg !18
    call void @llvm.dbg.value(metadata i32 %y, metadata !15, metadata !DIExpression()), !dbg !18
    call void @llvm.dbg.value(metadata i32 7, metadata !17, metadata !DIExpression()), !dbg !18
    tail call void @fn2(i32 7), !dbg !18
    ret void, !dbg !18
  }
  
  declare !dbg !4 dso_local void @fn2(i32) local_unnamed_addr
  
  ; Function Attrs: nounwind readnone speculatable
  declare void @llvm.dbg.value(metadata, metadata, metadata)
  
  
  !llvm.dbg.cu = !{!0}
  !llvm.module.flags = !{!5, !6, !7}
  !llvm.ident = !{!8}
  
  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 9.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
  !1 = !DIFile(filename: "test.c", directory: "/dir")
  !2 = !{}
  !3 = !{!4}
  !4 = !DISubprogram(name: "fn2", scope: !1, file: !1, line: 11, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
  !5 = !{i32 2, !"Dwarf Version", i32 4}
  !6 = !{i32 2, !"Debug Info Version", i32 3}
  !7 = !{i32 1, !"wchar_size", i32 4}
  !8 = !{!"clang version 9.0.0"}
  !9 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 15, type: !10, scopeLine: 15, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !13)
  !10 = !DISubroutineType(types: !11)
  !11 = !{null, !12, !12}
  !12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  !13 = !{!14, !15, !16, !17}
  !14 = !DILocalVariable(name: "x", arg: 1, scope: !9, file: !1, line: 15, type: !12)
  !15 = !DILocalVariable(name: "y", arg: 2, scope: !9, file: !1, line: 15, type: !12)
  !16 = !DILocalVariable(name: "u", scope: !9, file: !1, line: 16, type: !12)
  !17 = !DILocalVariable(name: "a", scope: !9, file: !1, line: 21, type: !12)
  !18 = !DILocation(line: 15, column: 10, scope: !9)

...
---
name:            fn1
alignment:       16
tracksRegLiveness: true
liveins:         []
body:             |
  bb.0.entry:
    DBG_VALUE $edi, $noreg, !14, !DIExpression(), debug-location !18
    DBG_VALUE $esi, $noreg, !15, !DIExpression(), debug-location !18
    DBG_VALUE 7, $noreg, !17, !DIExpression(), debug-location !18
    $edi = MOV32ri 7, debug-location !18
    TAILJMPd64 @fn2, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit killed $edi, debug-location !18

...