# RUN: llc -start-after=prologepilog -filetype=obj -O0 %s -o - -experimental-debug-variable-locations=true | llvm-readobj --codeview - | FileCheck %s
# Offsets are now CFA, or VFRAME, relative. Both the NRVO sret pointer and the
# string* parameter are on the stack, NRVO at offset 4 (after RA), and Str at
# offset 8 (next slot). The stack size is 4, so the DW_OP_plus_uconst math
# works out.
# (DW_OP_plus_uconst 12)
# CHECK: LocalSym {
# CHECK-NEXT: Kind: S_LOCAL (0x113E)
# CHECK-NEXT: Type: string* (0x
# CHECK-NEXT: Flags [ (0x0)
# CHECK-NEXT: ]
# CHECK-NEXT: VarName: Str
# CHECK-NEXT: }
# CHECK-NEXT: DefRangeFramePointerRelSym {
# CHECK-NEXT: Kind: S_DEFRANGE_FRAMEPOINTER_REL (0x1142)
# CHECK-NEXT: Offset: 12
# CHECK-NEXT: LocalVariableAddrRange {
# CHECK-NEXT: OffsetStart:
# CHECK-NEXT: ISectStart:
# CHECK-NEXT: Range:
# CHECK-NEXT: }
# CHECK-NEXT: }
# (DW_OP_plus_uconst, 8, DW_OP_deref)
# CHECK: LocalSym {
# CHECK-NEXT: Kind: S_LOCAL (0x113E)
# CHECK-NEXT: Type: string& (0x
# CHECK-NEXT: Flags [ (0x0)
# CHECK-NEXT: ]
# CHECK-NEXT: VarName: Result
# CHECK-NEXT: }
# CHECK-NEXT: DefRangeFramePointerRelSym {
# CHECK-NEXT: Kind: S_DEFRANGE_FRAMEPOINTER_REL (0x1142)
# CHECK-NEXT: Offset: 8
# CHECK-NEXT: LocalVariableAddrRange {
# CHECK-NEXT: OffsetStart: .text+0x5
# CHECK-NEXT: ISectStart: 0x0
# CHECK-NEXT: Range: 0x18
# CHECK-NEXT: }
# CHECK-NEXT: }
# (DW_OP_constu, 4, DW_OP_minus)
# CHECK: LocalSym {
# CHECK-NEXT: Kind: S_LOCAL (0x113E)
# CHECK-NEXT: Type: long (0x12)
# CHECK-NEXT: Flags [ (0x0)
# CHECK-NEXT: ]
# CHECK-NEXT: VarName: Bytes
# CHECK-NEXT: }
# CHECK-NEXT: DefRangeRegisterRelSym {
# CHECK-NEXT: Kind: S_DEFRANGE_REGISTER_REL (0x1145)
# CHECK-NEXT: BaseRegister:
# CHECK-NEXT: HasSpilledUDTMember: No
# CHECK-NEXT: OffsetInParent: 0
# CHECK-NEXT: BasePointerOffset: -4
# CHECK-NEXT: LocalVariableAddrRange {
# CHECK-NEXT: OffsetStart:
# CHECK-NEXT: ISectStart:
# CHECK-NEXT: Range:
# CHECK-NEXT: }
# CHECK-NEXT: }
--- |
; ModuleID = '<stdin>'
source_filename = "<stdin>"
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
target triple = "i386-pc-windows-msvc19.0.24215"
%struct.string = type { i32, i32, ptr }
define void @fun(ptr noalias sret(%struct.string) %agg.result, ptr noalias %str) !dbg !12 {
entry:
call void @llvm.dbg.value(metadata ptr %agg.result, metadata !23, metadata !24), !dbg !25
call void @llvm.dbg.value(metadata ptr %str, metadata !26, metadata !28), !dbg !25
%call = call dereferenceable(12) ptr @getString(), !dbg !29
%0 = bitcast ptr %agg.result to ptr, !dbg !29
%1 = bitcast ptr %call to ptr, !dbg !29
call void @llvm.memcpy.p0.p0.i32(ptr %0, ptr %1, i32 12, i32 4, i1 false), !dbg !29
ret void, !dbg !30
}
define i32 @len(ptr %s, i32 %acc) !dbg !31 {
entry:
%0 = bitcast ptr %s to ptr
%bytes = load i32, ptr %0, !dbg !34
call void @llvm.dbg.declare(metadata i32 %bytes, metadata !35, metadata !28), !dbg !34
%1 = add i32 %bytes, %acc, !dbg !36
ret i32 %1, !dbg !36
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #0
declare dereferenceable(12) ptr @getString()
; Function Attrs: argmemonly nounwind
declare void @llvm.memcpy.p0.p0.i32(ptr nocapture writeonly, ptr nocapture readonly, i32, i32, i1) #1
; Function Attrs: nounwind
declare void @llvm.stackprotector(ptr, ptr) #2
attributes #0 = { nounwind readnone speculatable }
attributes #1 = { argmemonly nounwind }
attributes #2 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.linker.options = !{!3, !4}
!llvm.module.flags = !{!5, !6, !7, !8}
!llvm.ident = !{!9}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 6.0.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "diexpr.ll", directory: "C:\5Csrc", checksumkind: CSK_MD5, checksum: "c547c362c610fa79e7abaddc76e1efe7")
!2 = !{}
!3 = !{!"/DEFAULTLIB:libcmt.lib"}
!4 = !{!"/DEFAULTLIB:oldnames.lib"}
!5 = !{i32 1, !"NumRegisterParameters", i32 0}
!6 = !{i32 2, !"CodeView", i32 1}
!7 = !{i32 2, !"Debug Info Version", i32 3}
!8 = !{i32 1, !"wchar_size", i32 2}
!9 = !{!"clang version 6.0.0 "}
!10 = !DIExpression(DW_OP_plus_uconst, 12)
!11 = !DIExpression(DW_OP_plus_uconst, 8, DW_OP_deref)
!12 = distinct !DISubprogram(name: "fun", linkageName: "fun", scope: !1, file: !1, line: 9, type: !13, isLocal: false, isDefinition: true, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!13 = !DISubroutineType(types: !14)
!14 = !{!15}
!15 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "string", file: !1, line: 1, size: 96, elements: !16, identifier: ".?AUstring@@")
!16 = !{!17, !19, !20}
!17 = !DIDerivedType(tag: DW_TAG_member, name: "length", scope: !15, file: !1, line: 2, baseType: !18, size: 32)
!18 = !DIBasicType(name: "long", size: 32, encoding: DW_ATE_signed)
!19 = !DIDerivedType(tag: DW_TAG_member, name: "size", scope: !15, file: !1, line: 3, baseType: !18, size: 32, offset: 32)
!20 = !DIDerivedType(tag: DW_TAG_member, name: "data", scope: !15, file: !1, line: 4, baseType: !21, size: 32, offset: 64)
!21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !22, size: 32)
!22 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
!23 = !DILocalVariable(name: "Result", scope: !12, file: !1, line: 10, type: !15)
!24 = !DIExpression(DW_OP_deref)
!25 = !DILocation(line: 10, scope: !12)
!26 = !DILocalVariable(name: "Str", scope: !12, file: !1, line: 10, type: !27)
!27 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 32)
!28 = !DIExpression(DW_OP_constu, 4, DW_OP_minus)
!29 = !DILocation(line: 11, scope: !12)
!30 = !DILocation(line: 12, scope: !12)
!31 = distinct !DISubprogram(name: "len", linkageName: "len", scope: !1, file: !1, line: 14, type: !32, isLocal: false, isDefinition: true, scopeLine: 14, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!32 = !DISubroutineType(types: !33)
!33 = !{!18}
!34 = !DILocation(line: 15, scope: !31)
!35 = !DILocalVariable(name: "Bytes", scope: !31, file: !1, line: 15, type: !18)
!36 = !DILocation(line: 16, scope: !31)
...
---
name: fun
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
registers:
liveins:
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 4
offsetAdjustment: 0
maxAlignment: 4
adjustsStack: true
hasCalls: true
stackProtector: ''
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
savePoint: ''
restorePoint: ''
fixedStack:
- { id: 0, type: spill-slot, offset: -8, size: 4, alignment: 4, stack-id: default,
callee-saved-register: '$esi' }
- { id: 1, type: default, offset: 4, size: 4, alignment: 4, stack-id: default,
isImmutable: true, isAliased: false, callee-saved-register: '' }
- { id: 2, type: default, offset: 0, size: 4, alignment: 4, stack-id: default,
isImmutable: true, isAliased: false, callee-saved-register: '' }
stack:
constants:
body: |
bb.0.entry:
liveins: $esi
frame-setup PUSH32r killed $esi, implicit-def $esp, implicit $esp
CFI_INSTRUCTION def_cfa_offset 8
CFI_INSTRUCTION offset $esi, -8
$esi = MOV32rm $esp, 1, _, 8, _ :: (load (s32) from %fixed-stack.2)
DBG_VALUE $esp, 0, !26, !10, debug-location !25
DBG_VALUE $esp, 0, !23, !DIExpression(DW_OP_plus_uconst, 8, DW_OP_deref), debug-location !25
CALLpcrel32 @getString, csr_32, implicit $esp, implicit-def $esp, implicit-def $eax, debug-location !29
$ecx = MOV32rm $eax, 1, _, 0, _, debug-location !29 :: (dereferenceable load (s32) from %ir.1)
$edx = MOV32rm $eax, 1, _, 4, _, debug-location !29 :: (dereferenceable load (s32) from %ir.1 + 4)
MOV32mr $esi, 1, _, 0, _, killed $ecx, debug-location !29 :: (store (s32) into %ir.0)
MOV32mr $esi, 1, _, 4, _, killed $edx, debug-location !29 :: (store (s32) into %ir.0 + 4)
$eax = MOV32rm killed $eax, 1, _, 8, _, debug-location !29 :: (dereferenceable load (s32) from %ir.1 + 8)
MOV32mr $esi, 1, _, 8, _, killed $eax, debug-location !29 :: (store (s32) into %ir.0 + 8)
$eax = COPY killed $esi, debug-location !30
$esi = POP32r implicit-def $esp, implicit $esp, debug-location !30
RET 0, $eax, debug-location !30
...
---
name: len
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
registers:
liveins:
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 4
adjustsStack: false
hasCalls: false
stackProtector: ''
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
savePoint: ''
restorePoint: ''
fixedStack:
- { id: 0, type: default, offset: 4, size: 4, alignment: 4, stack-id: default,
isImmutable: true, isAliased: false, callee-saved-register: '' }
- { id: 1, type: default, offset: 0, size: 4, alignment: 4, stack-id: default,
isImmutable: true, isAliased: false, callee-saved-register: '' }
stack:
constants:
body: |
bb.0.entry:
$eax = MOV32rm $esp, 1, _, 4, _ :: (load (s32) from %fixed-stack.1)
$eax = MOV32rm killed $eax, 1, _, 0, _, debug-location !34 :: (load (s32) from %ir.0)
DBG_VALUE $eax, 0, !35, !DIExpression(DW_OP_constu, 4, DW_OP_minus), debug-location !34
$eax = ADD32rm killed $eax, $esp, 1, _, 8, _, implicit-def dead $eflags, debug-location !36 :: (load (s32) from %fixed-stack.0)
RET 0, $eax, debug-location !36
...
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