test/DebugInfo/MIR/Mips/live-debug-values-reg-copy.mir

# RUN: llc -run-pass=livedebugvalues %s -o - | FileCheck %s
#
# This test tests tracking variables value transferring from one register to another.
# This example is altered additionally in order to test transferring from one float register
# to another. The altered instructions are labeled below.
#
# CHECK: ![[ARG1:.*]] = !DILocalVariable(name: "arg1"
# CHECK: ![[ARG2:.*]] = !DILocalVariable(name: "arg2"
# CHECK: DBG_VALUE $s0_64, $noreg, ![[ARG2]], !DIExpression(), debug-location
# CHECK: $s1_64 = OR64 killed $s0_64, $zero_64, debug-location
# CHECK-NEXT: DBG_VALUE $s1_64, $noreg, ![[ARG2]], !DIExpression(), debug-location
# CHECK: DBG_VALUE $f24, $noreg, ![[ARG1]], !DIExpression(), debug-location
# CHECK: $f26 = FMOV_S killed $f24, debug-location
# CHECK-NEXT: DBG_VALUE $f26, $noreg, ![[ARG1]], !DIExpression(), debug-location

--- |
  ; ModuleID = 'live-debug-values-reg-copy.ll'
  source_filename = "live-debug-values-reg-copy.c"
  target datalayout = "E-m:e-i8:8:32-i16:16:32-i64:64-n32:64-S128"
  target triple = "mips64-octeon-linux"

  define float @foo(float %arg1, i32 signext %arg2) local_unnamed_addr !dbg !8 {
  entry:
    call void @llvm.dbg.value(metadata float %arg1, metadata !14, metadata !DIExpression()), !dbg !19
    call void @llvm.dbg.value(metadata i32 %arg2, metadata !15, metadata !DIExpression()), !dbg !19
    %conv = fpext float %arg1 to double, !dbg !19
    %cmp = fcmp ogt double %conv, 1.012310e+01, !dbg !19
    br i1 %cmp, label %if.then, label %if.else, !dbg !19

  if.then:                                          ; preds = %entry
    %call = tail call float @externFunc(float %arg1), !dbg !19
    %call5 = tail call i32 @externFunc3(i32 signext %arg2), !dbg !19
    %conv6 = sitofp i32 %call5 to float, !dbg !19
    %add7 = fadd float %conv6, 0x3FF522D0E0000000, !dbg !19
    br label %if.end, !dbg !19

  if.else:                                          ; preds = %entry
    %add8 = fadd float %arg1, 1.000000e+01, !dbg !19
    call void @llvm.dbg.value(metadata float %add8, metadata !14, metadata !DIExpression()), !dbg !19
    %call9 = tail call float @externFunc2(float %add8), !dbg !19
    %call10 = tail call i32 @externFunc4(i32 signext %arg2), !dbg !19
    %conv11 = sitofp i32 %call10 to float, !dbg !19
    %add12 = fadd float %call9, %conv11, !dbg !19
    %call14 = tail call float @externFunc(float %add8), !dbg !19
    br label %if.end

  if.end:                                           ; preds = %if.else, %if.then
    %local.0 = phi float [ %add7, %if.then ], [ %add12, %if.else ]
    ret float %local.0, !dbg !19
  }

  declare float @externFunc(float) local_unnamed_addr

  declare i32 @externFunc3(i32 signext) local_unnamed_addr

  declare float @externFunc2(float) local_unnamed_addr

  declare i32 @externFunc4(i32 signext) local_unnamed_addr

  ; Function Attrs: nounwind readnone speculatable
  declare void @llvm.dbg.value(metadata, metadata, metadata) #0

  ; Function Attrs: nounwind
  declare void @llvm.stackprotector(i8*, i8**) #1

  attributes #0 = { nounwind readnone speculatable }
  attributes #1 = { nounwind }

  !llvm.dbg.cu = !{!0}
  !llvm.module.flags = !{!3, !4, !5, !6}
  !llvm.ident = !{!7}

  !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
  !1 = !DIFile(filename: "live-debug-values-reg-copy.c", directory: "/")
  !2 = !{}
  !3 = !{i32 2, !"Dwarf Version", i32 4}
  !4 = !{i32 2, !"Debug Info Version", i32 3}
  !5 = !{i32 1, !"wchar_size", i32 4}
  !6 = !{i32 7, !"PIC Level", i32 2}
  !7 = !{!"clang version 7.0.0 "}
  !8 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 6, type: !9, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !13)
  !9 = !DISubroutineType(types: !10)
  !10 = !{!11, !11, !12}
  !11 = !DIBasicType(name: "float", size: 32, encoding: DW_ATE_float)
  !12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  !13 = !{!14, !15}
  !14 = !DILocalVariable(name: "arg1", arg: 1, scope: !8, file: !1, line: 6, type: !11)
  !15 = !DILocalVariable(name: "arg2", arg: 2, scope: !8, file: !1, line: 6, type: !12)
  !19 = !DILocation(line: 6, column: 17, scope: !8)

...
---
name:            foo
alignment:       3
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
tracksRegLiveness: false
registers:
liveins:
  - { reg: '$f12', virtual-reg: '' }
  - { reg: '$a1_64', virtual-reg: '' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       32
  offsetAdjustment: 0
  maxAlignment:    8
  adjustsStack:    true
  hasCalls:        true
  stackProtector:  ''
  maxCallFrameSize: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  savePoint:       ''
  restorePoint:    ''
fixedStack:
stack:
  - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
      stack-id: 0, callee-saved-register: '$d25_64', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 1, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
      stack-id: 0, callee-saved-register: '$d24_64', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 2, name: '', type: spill-slot, offset: -24, size: 8, alignment: 8,
      stack-id: 0, callee-saved-register: '$ra_64', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 3, name: '', type: spill-slot, offset: -32, size: 8, alignment: 8,
      stack-id: 0, callee-saved-register: '$s0_64', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
constants:
  - id:              0
    value:           'double 1.012310e+01'
    alignment:       8
    isTargetSpecific: false
  - id:              1
    value:           'float 1.000000e+01'
    alignment:       4
    isTargetSpecific: false
  - id:              2
    value:           float 0x3FF522D0E0000000
    alignment:       4
    isTargetSpecific: false
body:             |
  bb.0.entry:
    successors: %bb.1(0x40000000), %bb.2(0x40000000)

    $sp_64 = DADDiu $sp_64, -32
    CFI_INSTRUCTION def_cfa_offset 32
    SDC164 killed $d25_64, $sp_64, 24 :: (store 8 into %stack.0)
    SDC164 killed $d24_64, $sp_64, 16 :: (store 8 into %stack.1)
    SD killed $ra_64, $sp_64, 8 :: (store 8 into %stack.2)
    SD killed $s0_64, $sp_64, 0 :: (store 8 into %stack.3)
    CFI_INSTRUCTION offset $d26_64, -8
    CFI_INSTRUCTION offset $d25_64, -4
    CFI_INSTRUCTION offset $d25_64, -16
    CFI_INSTRUCTION offset $d24_64, -12
    CFI_INSTRUCTION offset $ra_64, -24
    CFI_INSTRUCTION offset $s0_64, -32
    DBG_VALUE $f12, $noreg, !14, !DIExpression(), debug-location !19
    DBG_VALUE $a1_64, $noreg, !15, !DIExpression(), debug-location !19
    DBG_VALUE $s0, $noreg, !15, !DIExpression(), debug-location !19
    DBG_VALUE $s0_64, $noreg, !15, !DIExpression(), debug-location !19
    DBG_VALUE $f12, $noreg, !14, !DIExpression(), debug-location !19
    renamable $d0_64 = CVT_D64_S renamable $f12, debug-location !19
    renamable $at_64 = LUi64 target-flags(mips-highest) %const.0
    renamable $at_64 = DADDiu killed renamable $at_64, target-flags(mips-higher) %const.0
    renamable $at_64 = DSLL killed renamable $at_64, 16
    renamable $at_64 = DADDiu killed renamable $at_64, target-flags(mips-abs-hi) %const.0
    renamable $at_64 = DSLL killed renamable $at_64, 16
    renamable $d1_64 = LDC164 killed renamable $at_64, target-flags(mips-abs-lo) %const.0, debug-location !19 :: (load 8 from constant-pool)
    FCMP_D64 killed renamable $d0_64, killed renamable $d1_64, 7, implicit-def $fcc0, debug-location !19
    BC1T killed $fcc0, %bb.2, implicit-def $at, debug-location !19 {
      $s0_64 = OR64 $a1_64, $zero_64
    }

  bb.1.if.then:
    successors: %bb.3(0x80000000)

    JAL @externFunc, csr_n64, implicit-def dead $ra, implicit $f12, implicit-def $sp, implicit-def dead $f0, debug-location !19 {
      NOP debug-location !19
    }
    JAL @externFunc3, csr_n64, implicit-def dead $ra, implicit $a0_64, implicit-def $sp, implicit-def $v0, debug-location !19 {
      renamable $a0_64 = SLL64_32 renamable $s0, implicit $s0_64, debug-location !19
    }
    $f0 = MTC1 killed $v0, debug-location !19
    $f0 = CVT_S_W killed $f0, debug-location !19
    ; This instruction is inserted additionally in order to test moving from one register to another
    $s1_64 = OR64 killed $s0_64, $zero_64, debug-location !19
    renamable $at_64 = LUi64 target-flags(mips-highest) %const.2
    renamable $at_64 = DADDiu killed renamable $at_64, target-flags(mips-higher) %const.2
    renamable $at_64 = DSLL killed renamable $at_64, 16
    renamable $at_64 = DADDiu killed renamable $at_64, target-flags(mips-abs-hi) %const.2
    renamable $at_64 = DSLL killed renamable $at_64, 16
    renamable $f1 = LWC1 killed renamable $at_64, target-flags(mips-abs-lo) %const.2, debug-location !19 :: (load 4 from constant-pool)
    J %bb.3, implicit-def dead $at, debug-location !19 {
      renamable $f0 = FADD_S killed renamable $f0, killed renamable $f1, debug-location !19
    }

  bb.2.if.else:
    successors: %bb.3(0x80000000)

    renamable $at_64 = LUi64 target-flags(mips-highest) %const.1
    renamable $at_64 = DADDiu killed renamable $at_64, target-flags(mips-higher) %const.1
    renamable $at_64 = DSLL killed renamable $at_64, 16
    renamable $at_64 = DADDiu killed renamable $at_64, target-flags(mips-abs-hi) %const.1
    renamable $at_64 = DSLL killed renamable $at_64, 16
    renamable $f0 = LWC1 killed renamable $at_64, target-flags(mips-abs-lo) %const.1, debug-location !19 :: (load 4 from constant-pool)
    renamable $f24 = FADD_S killed renamable $f12, killed renamable $f0, debug-location !19
    DBG_VALUE $f24, $noreg, !14, !DIExpression(), debug-location !19
    JAL @externFunc2, csr_n64, implicit-def dead $ra, implicit $f12, implicit-def $sp, implicit-def $f0, debug-location !19 {
      $f12 = FMOV_S $f24, debug-location !19
    }
    $f25 = FMOV_S $f0, debug-location !19
    JAL @externFunc4, csr_n64, implicit-def dead $ra, implicit $a0_64, implicit-def $sp, implicit-def $v0, debug-location !19 {
      renamable $a0_64 = SLL64_32 renamable $s0, implicit killed $s0_64, debug-location !19
    }
    $s0 = OR $v0, $zero, debug-location !19
    JAL @externFunc, csr_n64, implicit-def dead $ra, implicit $f12, implicit-def $sp, implicit-def dead $f0, debug-location !19 {
      $f12 = FMOV_S $f24, debug-location !19
    }
    $f0 = MTC1 killed $s0, debug-location !19
    $f0 = CVT_S_W killed $f0, debug-location !19
    renamable $f0 = FADD_S renamable $f25, killed renamable $f0, debug-location !19
    ; This instruction is inserted additionally in order to test moving variable's value from one float register to another.
    $f26 = FMOV_S killed $f24, debug-location !19

  bb.3.if.end:
    $s0_64 = LD $sp_64, 0, debug-location !19 :: (load 8 from %stack.3)
    $ra_64 = LD $sp_64, 8, debug-location !19 :: (load 8 from %stack.2)
    $d24_64 = LDC164 $sp_64, 16, debug-location !19 :: (load 8 from %stack.1)
    $d25_64 = LDC164 $sp_64, 24, debug-location !19 :: (load 8 from %stack.0)
    PseudoReturn64 undef $ra_64, implicit $f0, debug-location !19 {
      $sp_64 = DADDiu $sp_64, 32
    }

...