llvm/test/CodeGen/X86/StackColoring-dbg-invariance.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mcpu=corei7 -no-stack-coloring=false -run-pass=stack-coloring -o - %s | FileCheck %s

# Difference between test_1 and test_2 is that there is a DBG_VALUE in test_1.
# If transformation is debug invariant the resulting LEA instruction should be
# the same (i.e. we should reuse the same stack slot).

--- |
  ; ModuleID = '<stdin>'
  source_filename = "StackColoring-dbg-invariance.ll"
  target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
  target triple = "x86_64-apple-macosx10.8.0"

  ; Function Attrs: argmemonly nofree nosync nounwind willreturn
  declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #0

  ; Function Attrs: argmemonly nofree nosync nounwind willreturn
  declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #0

  define i32 @test_1(i32 %in) #1 !dbg !5 {
  entry:
    %a1 = alloca [14 x i8*], align 8
    %a4 = alloca [11 x i8*], align 8
    call void @llvm.dbg.value(metadata [11 x i8*]* %a4, metadata !9, metadata !DIExpression()), !dbg !11
    ret i32 0
  }

  define i32 @test_2(i32 %in) #1 !dbg !12 {
  entry:
    %a1 = alloca [14 x i8*], align 8
    %a4 = alloca [11 x i8*], align 8
    ret i32 0
  }

  ; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
  declare void @llvm.dbg.value(metadata, metadata, metadata) #2

  attributes #0 = { argmemonly nofree nosync nounwind willreturn "target-cpu"="corei7" }
  attributes #1 = { "target-cpu"="corei7" }

  !llvm.dbg.cu = !{!0}
  !llvm.debugify = !{!2, !3}
  !llvm.module.flags = !{!4}

  !0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
  !1 = !DIFile(filename: "StackColoring-dbg-invariance.ll", directory: "/")
  !2 = !{i32 27}
  !3 = !{i32 18}
  !4 = !{i32 2, !"Debug Info Version", i32 3}
  !5 = distinct !DISubprogram(name: "test_1", linkageName: "test_1", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
  !6 = !DISubroutineType(types: !7)
  !7 = !{}
  !8 = !{!9}
  !9 = !DILocalVariable(name: "4", scope: !5, file: !1, line: 4, type: !10)
  !10 = !DIBasicType(name: "ty64", size: 64, encoding: DW_ATE_unsigned)
  !11 = !DILocation(line: 4, column: 1, scope: !5)
  !12 = distinct !DISubprogram(name: "test_2", linkageName: "test_2", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)

...
---
name:            test_1
alignment:       16
tracksRegLiveness: true
stack:
  - { id: 0, name: a1, type: default, offset: 0, size: 112, alignment: 8,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 3, name: a4, type: default, offset: 0, size: 88, alignment: 8,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
body:             |
  bb.0.entry:
    liveins: $edi

    ; CHECK-LABEL: name: test_1
    ; CHECK: liveins: $edi
    ; CHECK: DBG_VALUE %stack.0.a1, $noreg, !9, !DIExpression(), debug-location !11
    ; CHECK: [[LEA64r:%[0-9]+]]:gr64 = LEA64r %stack.0.a1, 1, $noreg, 0, $noreg
    ; CHECK: [[LEA64r1:%[0-9]+]]:gr64 = LEA64r %stack.0.a1, 1, $noreg, 0, $noreg
    ; CHECK: RET 0
    DBG_VALUE %stack.3.a4, $noreg, !9, !DIExpression(), debug-location !11
    LIFETIME_START %stack.3.a4
    LIFETIME_START %stack.0.a1
    %0:gr64 = LEA64r %stack.0.a1, 1, $noreg, 0, $noreg
    LIFETIME_END %stack.0.a1
    %1:gr64 = LEA64r %stack.3.a4, 1, $noreg, 0, $noreg
    LIFETIME_END %stack.3.a4
    RET 0
...
---
name:            test_2
alignment:       16
tracksRegLiveness: true
stack:
  - { id: 0, name: a1, type: default, offset: 0, size: 112, alignment: 8,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 3, name: a4, type: default, offset: 0, size: 88, alignment: 8,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
body:             |
  bb.0.entry:
    liveins: $edi

    ; CHECK-LABEL: name: test_2
    ; CHECK: liveins: $edi
    ; CHECK: [[LEA64r:%[0-9]+]]:gr64 = LEA64r %stack.0.a1, 1, $noreg, 0, $noreg
    ; CHECK: [[LEA64r1:%[0-9]+]]:gr64 = LEA64r %stack.0.a1, 1, $noreg, 0, $noreg
    ; CHECK: RET 0
    LIFETIME_START %stack.3.a4
    LIFETIME_START %stack.0.a1
    %0:gr64 = LEA64r %stack.0.a1, 1, $noreg, 0, $noreg
    LIFETIME_END %stack.0.a1
    %1:gr64 = LEA64r %stack.3.a4, 1, $noreg, 0, $noreg
    LIFETIME_END %stack.3.a4
    RET 0
...