# RUN: llc -start-after=livedebugvalues -filetype=obj -o - %s \
# RUN: | llvm-dwarfdump - | FileCheck %s
# CHECK: .debug_info contents:
# CHECK: DW_TAG_formal_parameter
# CHECK: DW_TAG_formal_parameter
# CHECK-NEXT: DW_AT_location
# CHECK-NEXT: [0x0000000000000010, 0x0000000000000014): DW_OP_reg1 W1
# CHECK-NEXT: [0x0000000000000014, 0x0000000000000038): DW_OP_breg31 WSP+8
# CHECK-NEXT: DW_AT_name {{.*}}"y"
--- |
; Generated at -Os from:
; struct Rect {
; double x, y, w, h;
; };
; void g(struct Rect);
; void h(int *);
; int f(int x, int y, struct Rect s) {
; g(s);
; if (y)
; h(&x);
; return 0;
; }
source_filename = "/tmp/clobber.c"
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "arm64-apple-ios"
%struct.Rect = type { double, double, double, double }
; Function Attrs: nounwind optsize ssp
define i32 @f(i32 %x, i32 %y, [4 x double] %s.coerce) local_unnamed_addr #0 !dbg !7 {
entry:
%x.addr = alloca i32, align 4
tail call void @llvm.dbg.value(metadata i32 %x, i64 0, metadata !19, metadata !22), !dbg !23
store i32 %x, i32* %x.addr, align 4, !tbaa !24
tail call void @llvm.dbg.value(metadata i32 %y, i64 0, metadata !20, metadata !22), !dbg !28
tail call void @llvm.dbg.declare(metadata %struct.Rect* undef, metadata !21, metadata !22), !dbg !29
tail call void @g([4 x double] %s.coerce) #4, !dbg !30
%tobool = icmp eq i32 %y, 0, !dbg !31
br i1 %tobool, label %if.end, label %if.then, !dbg !33
if.then: ; preds = %entry
tail call void @llvm.dbg.value(metadata i32* %x.addr, i64 0, metadata !19, metadata !22), !dbg !23
call void @h(i32* nonnull %x.addr) #4, !dbg !34
br label %if.end, !dbg !34
if.end: ; preds = %if.then, %entry
ret i32 0, !dbg !35
}
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare void @g([4 x double]) local_unnamed_addr #2
declare void @h(i32*) local_unnamed_addr #2
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
declare void @llvm.stackprotector(i8*, i8**) #3
attributes #0 = { nounwind optsize ssp }
attributes #1 = { nounwind readnone speculatable }
attributes #2 = { optsize }
attributes #3 = { nounwind }
attributes #4 = { nounwind optsize }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.0 (trunk 302682) (llvm/trunk 302683)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "/tmp/clobber.c", directory: "/Volumes/Data/apple-internal/swift")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 2}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"PIC Level", i32 2}
!6 = !{!"clang version 5.0.0 (trunk 302682) (llvm/trunk 302683)"}
!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 7, type: !8, isLocal: false, isDefinition: true, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !18)
!8 = !DISubroutineType(types: !9)
!9 = !{!10, !10, !10, !11}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "Rect", file: !1, line: 1, size: 256, elements: !12)
!12 = !{!13, !15, !16, !17}
!13 = !DIDerivedType(tag: DW_TAG_member, name: "x", scope: !11, file: !1, line: 2, baseType: !14, size: 64)
!14 = !DIBasicType(name: "double", size: 64, encoding: DW_ATE_float)
!15 = !DIDerivedType(tag: DW_TAG_member, name: "y", scope: !11, file: !1, line: 2, baseType: !14, size: 64, offset: 64)
!16 = !DIDerivedType(tag: DW_TAG_member, name: "w", scope: !11, file: !1, line: 2, baseType: !14, size: 64, offset: 128)
!17 = !DIDerivedType(tag: DW_TAG_member, name: "h", scope: !11, file: !1, line: 2, baseType: !14, size: 64, offset: 192)
!18 = !{!19, !20, !21}
!19 = !DILocalVariable(name: "x", arg: 1, scope: !7, file: !1, line: 7, type: !10)
!20 = !DILocalVariable(name: "y", arg: 2, scope: !7, file: !1, line: 7, type: !10)
!21 = !DILocalVariable(name: "s", arg: 3, scope: !7, file: !1, line: 7, type: !11)
!22 = !DIExpression()
!23 = !DILocation(line: 7, column: 11, scope: !7)
!24 = !{!25, !25, i64 0}
!25 = !{!"int", !26, i64 0}
!26 = !{!"omnipotent char", !27, i64 0}
!27 = !{!"Simple C/C++ TBAA"}
!28 = !DILocation(line: 7, column: 18, scope: !7)
!29 = !DILocation(line: 7, column: 33, scope: !7)
!30 = !DILocation(line: 8, column: 3, scope: !7)
!31 = !DILocation(line: 9, column: 7, scope: !32)
!32 = distinct !DILexicalBlock(scope: !7, file: !1, line: 9, column: 7)
!33 = !DILocation(line: 9, column: 7, scope: !7)
!34 = !DILocation(line: 10, column: 5, scope: !32)
!35 = !DILocation(line: 12, column: 3, scope: !7)
!36 = !DIExpression(DW_OP_constu, 8, DW_OP_plus)
...
---
name: f
alignment: 4
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
liveins:
- { reg: '$w0' }
- { reg: '$w1' }
- { reg: '$d0' }
- { reg: '$d1' }
- { reg: '$d2' }
- { reg: '$d3' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 32
offsetAdjustment: 0
maxAlignment: 8
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
stack:
- { id: 0, name: x.addr, offset: -20, size: 4, alignment: 4, local-offset: -4 }
- { id: 1, type: spill-slot, offset: -24, size: 4, alignment: 4 }
- { id: 2, type: spill-slot, offset: -8, size: 8, alignment: 8, callee-saved-register: '$lr' }
- { id: 3, type: spill-slot, offset: -16, size: 8, alignment: 8, callee-saved-register: '$fp' }
body: |
bb.0.entry:
successors: %bb.2.if.end(0x40000000), %bb.1.if.then(0x40000000)
liveins: $w0, $w1, $d0, $d1, $d2, $d3, $lr
$sp = frame-setup SUBXri $sp, 32, 0
frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store (s64) into %stack.3), (store (s64) into %stack.2)
$fp = frame-setup ADDXri $sp, 16, 0
DBG_VALUE $w0, _, !19, !22, debug-location !23
STURWi killed $w0, $fp, -4 :: (store (s32) into %stack.0.x.addr)
DBG_VALUE $w1, _, !20, !22, debug-location !28
STRWui killed $w1, $sp, 2, debug-location !30 :: (store (s32) into %stack.1)
DBG_VALUE $sp, 0, !20, !36, debug-location !28
BL @g, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $d0, implicit killed $d1, implicit killed $d2, implicit killed $d3, implicit-def $sp, debug-location !30
$w0 = LDRWui $sp, 2, debug-location !33 :: (load (s32) from %stack.1)
CBZW killed $w0, %bb.2.if.end, debug-location !33
bb.1.if.then:
successors: %bb.2.if.end(0x80000000)
DBG_VALUE $sp, 0, !20, !36, debug-location !28
$x0 = SUBXri $fp, 4, 0
DBG_VALUE $x0, _, !19, !22, debug-location !23
BL @h, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $x0, debug-location !34
bb.2.if.end:
DBG_VALUE $sp, 0, !20, !36, debug-location !28
$w8 = MOVZWi 0, 0
$x0 = ORRXrs $xzr, undef $x8, 0, implicit killed $w8, debug-location !35
$fp, $lr = LDPXi $sp, 2, debug-location !35 :: (load (s64) from %stack.3), (load (s64) from %stack.2)
$sp = ADDXri $sp, 32, 0, debug-location !35
RET undef $lr, implicit killed $w0, debug-location !35
...