# RUN: llc -start-after=phi-node-elimination -stop-after=virtregrewriter %s -mtriple=x86_64-unknown-unknown -o - -experimental-debug-variable-locations | FileCheck %s
# RUN: llc -O0 -start-after=phi-node-elimination -stop-after=regallocfast %s -mtriple=x86_64-unknown-unknown -o - -experimental-debug-variable-locations | FileCheck %s --check-prefix=FASTREG
#
# Test that DBG_INSTR_REFs can pass through livedebugvariables to the end of
# regalloc without problem. Program body copied from
# livedebugvars-crossbb-interval.mir.
#
# CHECK-LABEL: bb.0:
# CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0)
# CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0), dbg-instr-ref(2, 0)
# CHECK-NEXT: JMP_1
# CHECK-LABEL: bb.1:
# CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(2, 0)
# CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(2, 0), dbg-instr-ref(3, 0)
# CHECK-NEXT: JMP_1
# CHECK-LABEL: bb.2:
# CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(3, 0)
# CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(3, 0), dbg-instr-ref(4, 0)
# CHECK-NEXT: CALL64pcrel32
# CHECK-LABEL: bb.3:
# CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(4, 0)
# CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(4, 0), dbg-instr-ref(5, 0)
# CHECK-NEXT: JMP_1
#
#
# The fast register allocator puts some spills in -- these are no-ops as far
# as the slot indexes are concerned. It doesn't matter which side of spills
# the DBG_INSTR_REF lands on.
#
# FASTREG-LABEL: bb.0:
# FASTREG-DAG: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0)
# FASTREG-DAG: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0), dbg-instr-ref(2, 0)
# FASTREG-DAG: MOV64mr
# FASTREG-DAG: MOV32mr
# FASTREG-NEXT: JMP_1
# FASTREG-LABEL: bb.1:
# FASTREG: DBG_INSTR_REF {{.+}}, dbg-instr-ref(2, 0)
# FASTREG-DAG: DBG_INSTR_REF {{.+}}, dbg-instr-ref(2, 0), dbg-instr-ref(3, 0)
# FASTREG-NEXT: JMP_1
# FASTREG-LABEL: bb.2:
# FASTREG: DBG_INSTR_REF {{.+}}, dbg-instr-ref(3, 0)
# FASTREG-DAG: DBG_INSTR_REF {{.+}}, dbg-instr-ref(3, 0), dbg-instr-ref(4, 0)
# FASTREG-NEXT: CALL64pcrel32
# FASTREG-LABEL: bb.3:
# FASTREG-DAG: MOV32rm
# FASTREG-DAG: DBG_INSTR_REF {{.+}}, dbg-instr-ref(4, 0)
# FASTREG-DAG: DBG_INSTR_REF {{.+}}, dbg-instr-ref(4, 0), dbg-instr-ref(5, 0)
# FASTREG-DAG: MOV32mr
# FASTREG-NEXT: JMP_1
# FASTREG-LABEL: bb.4:
# FASTREG: DBG_INSTR_REF {{.+}}, dbg-instr-ref(5, 0)
# FASTREG-DAG: DBG_INSTR_REF {{.+}}, dbg-instr-ref(5, 0), dbg-instr-ref(1, 0)
# FASTREG-NEXT: RET64
--- |
; ModuleID = 'tmp.ll'
source_filename = "tmp.ll"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
%struct.a = type { i32 }
; Function Attrs: nounwind ssp
define i32 @bar() !dbg !4 {
ret i32 0, !dbg !18
}
declare i32 @foo();
; Function Attrs: nounwind readnone speculatable willreturn
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "asdf", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2)
!1 = !DIFile(filename: "bar.c", directory: "asdf")
!2 = !{}
!3 = !{i32 1, !"Debug Info Version", i32 3}
!4 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 5, type: !5, virtualIndex: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
!5 = !DISubroutineType(types: !6)
!6 = !{!7}
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !{!9, !14}
!9 = !DILocalVariable(name: "b", arg: 1, scope: !4, file: !1, line: 5, type: !10)
!10 = !DIDerivedType(tag: DW_TAG_pointer_type, scope: !0, baseType: !11, size: 64, align: 64)
!11 = !DICompositeType(tag: DW_TAG_structure_type, name: "a", scope: !0, file: !1, line: 1, size: 32, align: 32, elements: !12)
!12 = !{!13}
!13 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !1, file: !1, line: 2, baseType: !7, size: 32, align: 32)
!14 = !DILocalVariable(name: "x", scope: !15, file: !1, line: 6, type: !7)
!15 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 22)
!16 = !DILocation(line: 5, column: 19, scope: !4)
!17 = !DILocation(line: 6, column: 14, scope: !15)
!18 = !DILocation(line: 8, column: 2, scope: !15)
!19 = !DILocation(line: 7, column: 2, scope: !15)
!29 = !DILocalVariable(name: "c", scope: !4, file: !1, line: 5, type: !10)
...
---
name: bar
alignment: 16
tracksRegLiveness: true
debugInstrRef: true
registers:
- { id: 0, class: gr64 }
- { id: 1, class: gr32 }
- { id: 2, class: gr64 }
- { id: 3, class: gr64 }
- { id: 4, class: gr32 }
- { id: 5, class: gr32 }
- { id: 6, class: gr32 }
- { id: 7, class: gr32 }
liveins:
- { reg: '$rdi', virtual-reg: '%2' }
- { reg: '$esi', virtual-reg: '%4' }
frameInfo:
adjustsStack: true
hasCalls: true
machineFunctionInfo: {}
body: |
bb.0:
liveins: $rdi, $esi
%4:gr32 = COPY $esi
%2:gr64 = COPY $rdi
%3:gr64 = COPY killed %2
%5:gr32 = COPY killed %4
DBG_INSTR_REF !9, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !16
DBG_INSTR_REF !29, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), dbg-instr-ref(1, 0), dbg-instr-ref(2, 0), debug-location !16
JMP_1 %bb.3
bb.1:
DBG_INSTR_REF !9, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(2, 0), debug-location !16
DBG_INSTR_REF !29, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), dbg-instr-ref(2, 0), dbg-instr-ref(3, 0), debug-location !16
JMP_1 %bb.4
bb.2:
ADJCALLSTACKDOWN64 0, 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !19
$edi = COPY %6, debug-location !19
$al = MOV8ri 0, debug-location !19
DBG_INSTR_REF !9, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(3, 0), debug-location !16
DBG_INSTR_REF !29, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), dbg-instr-ref(3, 0), dbg-instr-ref(4, 0), debug-location !16
CALL64pcrel32 @foo, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit $edi, implicit-def $eax, debug-location !19
ADJCALLSTACKUP64 0, 0, implicit-def $rsp, implicit-def $eflags, implicit-def $ssp, implicit $rsp, implicit $ssp, debug-location !19
%7:gr32 = COPY $eax, debug-location !19
JMP_1 %bb.1
bb.3:
%6:gr32 = MOV32rm %3, 1, $noreg, 0, $noreg, debug-location !17
DBG_INSTR_REF !9, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(4, 0), debug-location !16
DBG_INSTR_REF !29, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), dbg-instr-ref(4, 0), dbg-instr-ref(5, 0), debug-location !16
JMP_1 %bb.2
bb.4:
$eax = COPY %5, debug-location !18
DBG_INSTR_REF !9, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(5, 0), debug-location !16
DBG_INSTR_REF !29, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), dbg-instr-ref(5, 0), dbg-instr-ref(1, 0), debug-location !16
RET64 implicit $eax, debug-location !18
...
Codebase Browser
llvm