# RUN: llc %s -o - -filetype=obj -start-after=livedebugvalues \
# RUN: -emit-call-site-info | \
# RUN: llvm-dwarfdump - | FileCheck %s --implicit-check-not=call_value
#
## Test that call-site information is produced for this input, but use the
## implicit not above to check that no call value entries are produced for
## the tail call. They're clobbered by the restoration of r14 and rbx.
##
## Addresses https://github.com/llvm/llvm-project/issues/57444
#
# CHECK: DW_TAG_call_site
# CHECK-NEXT: DW_AT_call_origin
# CHECK-NEXT: DW_AT_call_return_pc
#
# CHECK: DW_TAG_call_site
# CHECK-NEXT: DW_AT_call_origin
# CHECK-NEXT: DW_AT_call_tail_call (true)
# CHECK-NEXT: DW_AT_call_pc
--- |
; ModuleID = 'out.ll'
source_filename = "test.c"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@str = private unnamed_addr constant [5 x i8] c"ohai\00", align 1
; Function Attrs: nounwind uwtable
define dso_local i32 @foo(i64 noundef %a, i64 noundef %b) local_unnamed_addr #0 !dbg !16 {
entry:
call void @llvm.dbg.value(metadata i64 %a, metadata !22, metadata !DIExpression()), !dbg !24
call void @llvm.dbg.value(metadata i64 %b, metadata !23, metadata !DIExpression()), !dbg !24
%call = tail call i32 (...) @baz() #5, !dbg !25
%conv = trunc i64 %a to i32, !dbg !26
%conv1 = trunc i64 %b to i32, !dbg !27
%call2 = tail call i32 @bar(i32 noundef %conv, i32 noundef %conv1) #5, !dbg !28
ret i32 %call2, !dbg !29
}
declare !dbg !30 i32 @baz(...) local_unnamed_addr #1
declare !dbg !34 i32 @bar(i32 noundef, i32 noundef) local_unnamed_addr #1
; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare void @llvm.dbg.value(metadata, metadata, metadata) #3
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!9, !10, !11, !12, !13, !14}
!llvm.ident = !{!15}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !2, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "test.c", directory: ".", checksumkind: CSK_MD5, checksum: "98e51a9cf3bc6e1c3cc216ca4c82353a")
!2 = !{!3}
!3 = !DIGlobalVariableExpression(var: !4, expr: !DIExpression())
!4 = distinct !DIGlobalVariable(scope: null, file: !1, line: 11, type: !5, isLocal: true, isDefinition: true)
!5 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 48, elements: !7)
!6 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
!7 = !{!8}
!8 = !DISubrange(count: 6)
!9 = !{i32 7, !"Dwarf Version", i32 5}
!10 = !{i32 2, !"Debug Info Version", i32 3}
!11 = !{i32 1, !"wchar_size", i32 4}
!12 = !{i32 8, !"PIC Level", i32 2}
!13 = !{i32 7, !"PIE Level", i32 2}
!14 = !{i32 7, !"uwtable", i32 2}
!15 = !{!"clang"}
!16 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 5, type: !17, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !21)
!17 = !DISubroutineType(types: !18)
!18 = !{!19, !20, !20}
!19 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!20 = !DIBasicType(name: "long", size: 64, encoding: DW_ATE_signed)
!21 = !{!22, !23}
!22 = !DILocalVariable(name: "a", arg: 1, scope: !16, file: !1, line: 5, type: !20)
!23 = !DILocalVariable(name: "b", arg: 2, scope: !16, file: !1, line: 5, type: !20)
!24 = !DILocation(line: 0, scope: !16)
!25 = !DILocation(line: 6, column: 3, scope: !16)
!26 = !DILocation(line: 7, column: 14, scope: !16)
!27 = !DILocation(line: 7, column: 17, scope: !16)
!28 = !DILocation(line: 7, column: 10, scope: !16)
!29 = !DILocation(line: 7, column: 3, scope: !16)
!30 = !DISubprogram(name: "baz", scope: !1, file: !1, line: 4, type: !31, spFlags: DISPFlagOptimized, retainedNodes: !33)
!31 = !DISubroutineType(types: !32)
!32 = !{!19}
!33 = !{}
!34 = !DISubprogram(name: "bar", scope: !1, file: !1, line: 3, type: !35, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !33)
!35 = !DISubroutineType(types: !36)
!36 = !{!19, !19, !19}
!37 = distinct !DISubprogram(name: "qux", scope: !1, file: !1, line: 10, type: !31, scopeLine: 10, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !33)
!38 = !DILocation(line: 11, column: 3, scope: !37)
!39 = !DILocation(line: 12, column: 3, scope: !37)
...
---
name: foo
alignment: 16
tracksRegLiveness: true
tracksDebugUserValues: true
liveins:
- { reg: '$rdi' }
- { reg: '$rsi' }
frameInfo:
stackSize: 24
offsetAdjustment: -24
maxAlignment: 1
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 16
hasTailCall: true
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' }
callSites:
- { bb: 0, offset: 15 }
- { bb: 0, offset: 28, fwdArgRegs:
- { arg: 0, reg: '$edi' }
- { arg: 1, reg: '$esi' } }
debugValueSubstitutions:
- { srcinst: 2, srcop: 0, dstinst: 1, dstop: 0, subreg: 6 }
- { srcinst: 4, srcop: 0, dstinst: 3, dstop: 0, subreg: 6 }
machineFunctionInfo: {}
body: |
bb.0.entry:
liveins: $rdi, $rsi, $r14, $rbx
DBG_VALUE $rdi, $noreg, !22, !DIExpression(), debug-location !24
DBG_VALUE $rsi, $noreg, !23, !DIExpression(), debug-location !24
frame-setup PUSH64r killed $r14, implicit-def $rsp, implicit $rsp
frame-setup CFI_INSTRUCTION def_cfa_offset 16
frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
frame-setup CFI_INSTRUCTION def_cfa_offset 24
frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
frame-setup CFI_INSTRUCTION def_cfa_offset 32
CFI_INSTRUCTION offset $rbx, -24
CFI_INSTRUCTION offset $r14, -16
DBG_PHI $rsi, 3
DBG_PHI $rdi, 1
$rbx = MOV64rr $rsi
$r14 = MOV64rr $rdi
dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !25
CALL64pcrel32 target-flags(x86-plt) @baz, csr_64, implicit $rsp, implicit $ssp, implicit killed $al, implicit-def $rsp, implicit-def $ssp, implicit-def dead $eax, debug-location !25
DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !24
DBG_VALUE $r14, $noreg, !22, !DIExpression(), debug-location !24
$edi = MOV32rr $r14d, implicit killed $r14, debug-location !28
$esi = MOV32rr $ebx, implicit killed $rbx, debug-location !28
$rsp = frame-destroy ADD64ri8 $rsp, 8, implicit-def dead $eflags, debug-location !28
frame-destroy CFI_INSTRUCTION def_cfa_offset 24, debug-location !28
;; This tail-call popping of rbx clobbers the call site information
$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !28
DBG_VALUE $rsi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !24
frame-destroy CFI_INSTRUCTION def_cfa_offset 16, debug-location !28
;; This tail-call popping of r14 clobbers the call site information
$r14 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !28
DBG_VALUE $rdi, $noreg, !22, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !24
frame-destroy CFI_INSTRUCTION def_cfa_offset 8, debug-location !28
TAILJMPd64 target-flags(x86-plt) @bar, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit $edi, implicit $esi, debug-location !28
...
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