src/llvm-project/llvm/test/DebugInfo/MIR/X86/multiple-param-dbg-value-entry.mir

# RUN: llc -debug-entry-values -run-pass=livedebugvalues -march=x86-64 -o - %s| FileCheck %s
# RUN: llc -force-instr-ref-livedebugvalues=1 -debug-entry-values -run-pass=livedebugvalues -march=x86-64 -o - %s| FileCheck %s
## Test case:
## int global;
## int foo(int p, int q, int r) {
##   global = p + 1;
##   asm __volatile("" : : : "edi", "esi", "edx");
##   return 123;
## }
##
##  Verify that DW_OP_LLVM_entry_values are generated for parameters with multiple
##  DBG_VALUEs at entry block.
# CHECK: DBG_VALUE $edi, $noreg, !{{.*}}, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location {{.*}}
# CHECK: INLINEASM
# CHECK-DAG: DBG_VALUE $esi, $noreg, !{{.*}}, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location {{.*}}
# CHECK-DAG: DBG_VALUE $edx, $noreg, !{{.*}}, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location {{.*}}
# CHECK $eax = MOV32ri 123

--- |
  ; ModuleID = 'multiple-param-dbg-value-entry.ll'
  source_filename = "multiple-param-dbg-value-entry.c"
  target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"

  @global = common dso_local local_unnamed_addr global i32 0, align 4, !dbg !0

  define dso_local i32 @foo(i32 %p, i32 %q, i32 %r) local_unnamed_addr !dbg !11 {
  entry:
    call void @llvm.dbg.value(metadata i32 %p, metadata !15, metadata !DIExpression()), !dbg !18
    call void @llvm.dbg.value(metadata i32 %q, metadata !16, metadata !DIExpression()), !dbg !18
    call void @llvm.dbg.value(metadata i32 %r, metadata !17, metadata !DIExpression()), !dbg !18
    %add = add nsw i32 %p, 1, !dbg !18
    store i32 %add, i32* @global, align 4, !dbg !18
    tail call void asm sideeffect "", "~{edi},~{esi},~{edx},~{dirflag},~{fpsr},~{flags}"(), !dbg !18, !srcloc !19
    ret i32 123, !dbg !18
  }

  ; Function Attrs: nounwind readnone speculatable
  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: "global", scope: !2, file: !3, line: 8, type: !6, isLocal: false, isDefinition: true)
  !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 9.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
  !3 = !DIFile(filename: "multiple-param-dbg-value-entry.c", directory: "/")
  !4 = !{}
  !5 = !{!0}
  !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  !7 = !{i32 2, !"Dwarf Version", i32 4}
  !8 = !{i32 2, !"Debug Info Version", i32 3}
  !9 = !{i32 1, !"wchar_size", i32 4}
  !10 = !{!"clang version 9.0.0 "}
  !11 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 9, type: !12, scopeLine: 9, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !14)
  !12 = !DISubroutineType(types: !13)
  !13 = !{!6, !6, !6, !6}
  !14 = !{!15, !16, !17}
  !15 = !DILocalVariable(name: "p", arg: 1, scope: !11, file: !3, line: 9, type: !6)
  !16 = !DILocalVariable(name: "q", arg: 2, scope: !11, file: !3, line: 9, type: !6)
  !17 = !DILocalVariable(name: "r", arg: 3, scope: !11, file: !3, line: 9, type: !6)
  !18 = !DILocation(line: 9, column: 13, scope: !11)
  !19 = !{i32 213}

...
---
name:            foo
alignment:       16
tracksRegLiveness: true
liveins:
  - { reg: '$edi' }
body:             |
  bb.0.entry:
    liveins: $edi

    DBG_VALUE $edi, $noreg, !15, !DIExpression(), debug-location !18
    DBG_VALUE $esi, $noreg, !16, !DIExpression(), debug-location !18
    DBG_VALUE $edx, $noreg, !17, !DIExpression(), debug-location !18
    renamable $edi = nsw INC32r killed renamable $edi, implicit-def dead $eflags, debug-location !18
    MOV32mr $rip, 1, $noreg, @global, $noreg, killed renamable $edi, debug-location !18 :: (store (s32) into @global)
    INLINEASM &"", 1, 12, implicit-def dead early-clobber $edi, 12, implicit-def dead early-clobber $esi, 12, implicit-def dead early-clobber $edx, 12, implicit-def dead early-clobber $df, 12, implicit-def dead early-clobber $fpsw, 12, implicit-def dead early-clobber $eflags, !19, debug-location !18
    $eax = MOV32ri 123, debug-location !18
    RETQ killed $eax, debug-location !18

...