# RUN: llc %s -o - -run-pass=livedebugvalues -march=x86-64 \
# RUN: -experimental-debug-variable-locations=true \
# RUN: | FileCheck %s
#
## This test used to crash InstrRefBasedLDV, due to fragment information going
## missing; test for that, and also check what happens when we have assignments
## outside of lexical scope. In the IR below, "_First" is only in scope in the
## entry block, but is assigned in every block. Under current behaviour, that
## means that InstrRefBasedLDV will propagate its location through all blocks.
#
# CHECK: ![[FIRSTVAR:[0-9]+]] = !DILocalVariable(name: "_First",
#
# CHECK-LABEL: bb.0.entry:
# CHECK: DBG_VALUE $rbx, $noreg, ![[FIRSTVAR]],
# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 64, 64)
#
# CHECK-LABEL: bb.1.if.then.i.i.i.i.i:
# CHECK: DBG_VALUE $rbx, $noreg, ![[FIRSTVAR]],
# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 64, 64)
# CHECK: DBG_INSTR_REF {{.*}} ![[FIRSTVAR]],
# CHECK: DBG_VALUE $rbx, $noreg, ![[FIRSTVAR]],
# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 64, 64)
# CHECK-LABEL: bb.2._Z17do_insert_cv_testI5_TreeEvv.exit:
# CHECK: DBG_VALUE $rbx, $noreg, ![[FIRSTVAR]],
# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 64, 64)
# CHECK: DBG_INSTR_REF {{.*}} ![[FIRSTVAR]],
# CHECK: DBG_VALUE $rbx, $noreg, ![[FIRSTVAR]],
# CHECK-SAME: !DIExpression(DW_OP_LLVM_fragment, 64, 64)
--- |
source_filename = "reduced.ll"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
%class._Tree = type { i8 }
%class._Tree_const_iterator = type { %class._Tree_unchecked_const_iterator }
%class._Tree_unchecked_const_iterator = type { %struct._Iterator_base0, i32* }
%struct._Iterator_base0 = type { i32 }
define i32 @main({ i32, i32* } %call.i) !dbg !6 {
entry:
call void @llvm.dbg.value(metadata i32 2, metadata !10, metadata !DIExpression()), !dbg !12
%call.i1 = call { i32, i32* } undef(%class._Tree* null)
%0 = extractvalue { i32, i32* } %call.i, 1
call void @llvm.dbg.value(metadata i32* %0, metadata !13, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !15
%call.i.i.i.i.i = call i8 undef(i32* null), !dbg !15
br i1 undef, label %_Z17do_insert_cv_testI5_TreeEvv.exit, label %if.then.i.i.i.i.i
if.then.i.i.i.i.i:
%call3.i.i.i.i.i = call i32* undef(i32* null)
call void @llvm.dbg.value(metadata i32* %call3.i.i.i.i.i, metadata !13, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !15
br label %_Z17do_insert_cv_testI5_TreeEvv.exit
_Z17do_insert_cv_testI5_TreeEvv.exit:
%_First.sroa.2.0.i.i = phi i32* [ %0, %entry ], [ %call3.i.i.i.i.i, %if.then.i.i.i.i.i ]
call void @llvm.dbg.value(metadata i32* %_First.sroa.2.0.i.i, metadata !13, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !15
call void undef(%class._Tree_const_iterator* null, i32 0, i32* %_First.sroa.2.0.i.i), !dbg !16
ret i32 0
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!2, !3, !4, !5}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 14.0.0 (git@github.com:llvm/llvm-project ffb249520766d4e2ca120c09dae7afa3d64ef81d)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "toolchain10279.cpp", directory: "/home/jmorse")
!2 = !{i32 7, !"Dwarf Version", i32 4}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = !{i32 1, !"wchar_size", i32 4}
!5 = !{i32 7, !"uwtable", i32 1}
!6 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 52, type: !7, scopeLine: 52, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
!7 = !DISubroutineType(types: !8)
!8 = !{!9}
!9 = !DIBasicType(name: "int", size: 128, encoding: DW_ATE_signed)
!10 = !DILocalVariable(name: "v1", scope: !11, file: !1, line: 47, type: !9)
!11 = distinct !DILexicalBlock(scope: !6)
!12 = !DILocation(line: 0, scope: !11)
!13 = !DILocalVariable(name: "_First", arg: 1, scope: !14, file: !1, line: 11, type: !9)
!14 = distinct !DILexicalBlock(scope: !6)
!15 = !DILocation(line: 0, scope: !14)
!16 = !DILocation(line: 50, column: 11, scope: !11)
...
---
name: main
alignment: 16
tracksRegLiveness: true
liveins:
- { reg: '$rsi' }
frameInfo:
stackSize: 24
offsetAdjustment: -24
maxAlignment: 1
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 16
fixedStack:
- { id: 0, type: spill-slot, offset: -24, size: 8, alignment: 8, callee-saved-register: '$rbx' }
- { id: 1, type: spill-slot, offset: -16, size: 8, alignment: 16, callee-saved-register: '$r14' }
machineFunctionInfo: {}
body: |
bb.0.entry:
liveins: $rsi, $r14, $rbx
frame-setup PUSH64r killed $r14, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 24
frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 32
CFI_INSTRUCTION offset $rbx, -24
CFI_INSTRUCTION offset $r14, -16
DBG_PHI $rsi, 2
$rbx = MOV64rr $rsi
DBG_VALUE 2, $noreg, !10, !DIExpression(), debug-location !12
renamable $r14d = XOR32rr undef $r14d, undef $r14d, implicit-def dead $eflags, implicit-def $r14
dead $edi = XOR32rr undef $edi, undef $edi, implicit-def dead $eflags, implicit-def $rdi
CALL64r undef renamable $rax, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def dead $eax, implicit-def dead $rdx
DBG_INSTR_REF 2, 0, !13, !DIExpression(DW_OP_LLVM_fragment, 64, 64), debug-location !15
dead $edi = XOR32rr undef $edi, undef $edi, implicit-def dead $eflags, implicit-def $rdi, debug-location !15
CALL64r undef renamable $rax, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def dead $al, debug-location !15
TEST8rr renamable $r14b, renamable $r14b, implicit-def $eflags, implicit killed $r14
JCC_1 %bb.2, 5, implicit $eflags
bb.1.if.then.i.i.i.i.i:
dead $edi = XOR32rr undef $edi, undef $edi, implicit-def dead $eflags, implicit-def $rdi
CALL64r undef renamable $rax, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit-def $rsp, implicit-def $ssp, implicit-def $rax, debug-instr-number 3
$rbx = MOV64rr killed $rax
DBG_INSTR_REF 3, 7, !13, !DIExpression(DW_OP_LLVM_fragment, 64, 64), debug-location !15
bb.2._Z17do_insert_cv_testI5_TreeEvv.exit:
liveins: $rbx
DBG_PHI $rbx, 1
DBG_INSTR_REF 1, 0, !13, !DIExpression(DW_OP_LLVM_fragment, 64, 64), debug-location !15
dead $edi = XOR32rr undef $edi, undef $edi, implicit-def dead $eflags, implicit-def $rdi, debug-location !16
$esi = XOR32rr undef $esi, undef $esi, implicit-def dead $eflags, debug-location !16
$rdx = MOV64rr killed $rbx, debug-location !16
CALL64r undef renamable $rax, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit $esi, implicit killed $rdx, implicit-def $rsp, implicit-def $ssp, debug-location !16
$eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags
$rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags
CFI_INSTRUCTION def_cfa_offset 24
$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
$r14 = frame-destroy POP64r implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 8
RET64 killed $eax
...