llvm/test/DebugInfo/X86/shrink-wrap-frame-setup-no-loc.mir

# RUN: %llc_dwarf %s -o - -mtriple=x86_64-unknown-unknown --start-after=livedebugvalues | FileCheck %s

## Check the line number from the ret above `.LBB0_2` doesn't leak onto the
## frame setup instructions in the `.LBB0_2` block; `pushq   %rax` should
## explicitly get set to line zero.

# CHECK: loop:
# CHECK-NEXT: .Lfunc_begin0:
# CHECK-NEXT:         .cfi_startproc
# CHECK-NEXT: # %bb.0:
# CHECK-NEXT:         .file   1 "/" "test.c"
# CHECK-NEXT:         .loc    1 5 16 prologue_end             # test.c:5:16
# CHECK-NEXT:         testq   %rax, %rax
# CHECK-NEXT:         je      .LBB0_2
# CHECK-NEXT: # %bb.1:
# CHECK-NEXT:         .loc    1 5 16                          # test.c:5:16
# CHECK-NEXT:         retq
# CHECK-NEXT: .LBB0_2:
# -- Check the .loc below sets the current location to line 0.
# CHECK-NEXT:         .loc    1 0 16 is_stmt 0                # test.c:0:16
# CHECK-NEXT:         pushq   %rax
# CHECK-NEXT:         .cfi_def_cfa_offset 16
# CHECK-NEXT:         addq    $8, %rsp
# CHECK-NEXT:         .cfi_def_cfa_offset 8
# CHECK-NEXT:         .loc    1 5 16 is_stmt 1                # test.c:5:16
# CHECK-NEXT:         retq

--- |
  source_filename = "reduced.ll"
  target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
  target triple = "x86_64-unknown-unknown"

  define void @loop(i64 %i) !dbg !4 {
  entry:
    %cmp.not = icmp eq i64 %i, 0, !dbg !7
    br i1 %cmp.not, label %for.body, label %for.end

  for.body:                                         ; preds = %entry
    %puts10 = tail call i32 null(ptr null)
    %inc = add i64 0, 0
    br label %for.end

  for.end:                                          ; preds = %for.body, %entry
    ret void
  }

  !llvm.dbg.cu = !{!0}
  !llvm.module.flags = !{!3}

  !0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 22.0.0git", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !2, splitDebugInlining: false, nameTableKind: None)
  !1 = !DIFile(filename: "test.c", directory: "/")
  !2 = !{}
  !3 = !{i32 2, !"Debug Info Version", i32 3}
  !4 = distinct !DISubprogram(name: "loop", scope: !1, file: !1, line: 4, type: !5, scopeLine: 4, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2, keyInstructions: true)
  !5 = !DISubroutineType(types: !6)
  !6 = !{null}
  !7 = !DILocation(line: 5, column: 16, scope: !8, atomGroup: 720, atomRank: 2)
  !8 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 9)
...
---
name:            loop
alignment:       16
tracksRegLiveness: true
noPhis:          true
isSSA:           false
noVRegs:         true
hasFakeUses:     false
debugInstrRef:   true
tracksDebugUserValues: true
liveins:
  - { reg: '$rdi' }
frameInfo:
  stackSize:       8
  offsetAdjustment: -8
  maxAlignment:    1
  adjustsStack:    true
  hasCalls:        true
  maxCallFrameSize: 0
  isCalleeSavedInfoValid: true
machineFunctionInfo:
  amxProgModel:    None
body:             |
  bb.0:
    successors: %bb.1(0x30000000), %bb.2(0x50000000)
    liveins: $rdi

    TEST64rr undef renamable $rax, undef renamable $rax, implicit-def $eflags,  debug-location !7
    JCC_1 %bb.1, 4, implicit $eflags

  bb.2:
    RET64 debug-location !7

  bb.1:
    frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
    frame-setup CFI_INSTRUCTION def_cfa_offset 16
    $rsp = frame-destroy ADD64ri32 $rsp, 8, implicit-def dead $eflags
    frame-destroy CFI_INSTRUCTION def_cfa_offset 8
    RET64 debug-location !7
...