# RUN: llc -emit-call-site-info -start-after=livedebugvalues -filetype=obj %s -o -| llvm-dwarfdump -| FileCheck %s
# Based on the following reproducer:
#
# #include <stdint.h>
#
# extern uint32_t value32(void);
# extern uint64_t value64(void);
# extern void call32(uint32_t);
# extern void call64(uint64_t);
#
# uint32_t test_sub_reg() {
# uint32_t local = value32();
# call64(local);
# return local;
# }
--- |
; ModuleID = 'ext.c'
source_filename = "ext.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"
; Function Attrs: minsize nounwind optsize uwtable
define i32 @test_sub_reg() #0 !dbg !22 {
entry:
%call = tail call i32 @value32(), !dbg !29
call void @llvm.dbg.value(metadata i32 %call, metadata !28, metadata !DIExpression()), !dbg !30
%conv = zext i32 %call to i64, !dbg !31
tail call void @call64(i64 %conv), !dbg !31
ret i32 %call, !dbg !32
}
declare !dbg !4 i32 @value32()
declare !dbg !8 void @call64(i64)
declare !dbg !12 i64 @value64()
declare !dbg !15 void @call32(i32)
; Function Attrs: nounwind readnone speculatable willreturn
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
attributes #0 = { minsize nounwind optsize uwtable }
attributes #1 = { nounwind readnone speculatable willreturn }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!18, !19, !20}
!llvm.ident = !{!21}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
!1 = !DIFile(filename: "ext.c", directory: "/")
!2 = !{}
!3 = !{!4, !8, !12, !15}
!4 = !DISubprogram(name: "value32", scope: !1, file: !1, line: 3, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
!5 = !DISubroutineType(types: !6)
!6 = !{!7}
!7 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
!8 = !DISubprogram(name: "call64", scope: !1, file: !1, line: 6, type: !9, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
!9 = !DISubroutineType(types: !10)
!10 = !{null, !11}
!11 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned)
!12 = !DISubprogram(name: "value64", scope: !1, file: !1, line: 4, type: !13, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
!13 = !DISubroutineType(types: !14)
!14 = !{!11}
!15 = !DISubprogram(name: "call32", scope: !1, file: !1, line: 5, type: !16, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
!16 = !DISubroutineType(types: !17)
!17 = !{null, !7}
!18 = !{i32 2, !"Dwarf Version", i32 4}
!19 = !{i32 2, !"Debug Info Version", i32 3}
!20 = !{i32 1, !"wchar_size", i32 4}
!21 = !{!"clang version 10.0.0"}
!22 = distinct !DISubprogram(name: "test_sub_reg", scope: !1, file: !1, line: 8, type: !23, scopeLine: 8, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !27)
!23 = !DISubroutineType(types: !24)
!24 = !{!25}
!25 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint32_t", file: !26, line: 52, baseType: !7)
!26 = !DIFile(filename: "/usr/include/stdint.h", directory: "")
!27 = !{!28}
!28 = !DILocalVariable(name: "local", scope: !22, file: !1, line: 9, type: !25)
!29 = !DILocation(line: 9, scope: !22)
!30 = !DILocation(line: 0, scope: !22)
!31 = !DILocation(line: 10, scope: !22)
!32 = !DILocation(line: 11, scope: !22)
...
---
name: test_sub_reg
tracksRegLiveness: true
callSites:
- { bb: 0, offset: 3 }
- { bb: 0, offset: 7, fwdArgRegs:
- { arg: 0, reg: '$rdi' } }
body: |
bb.0.entry:
liveins: $rbx
frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp, debug-location !29
CFI_INSTRUCTION def_cfa_offset 16
CFI_INSTRUCTION offset $rbx, -16
CALL64pcrel32 @value32, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !29
$ebx = MOV32rr $eax, debug-location !29
DBG_VALUE $ebx, $noreg, !28, !DIExpression(), debug-location !30
renamable $edi = MOV32rr $ebx, implicit-def $rdi, debug-location !31
CALL64pcrel32 @call64, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, debug-location !31
$eax = MOV32rr killed $ebx, debug-location !32
$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !32
CFI_INSTRUCTION def_cfa_offset 8, debug-location !32
RET64 killed $eax, debug-location !32
...
# Verify that a call site value is emitted for the 64-bit parameter that is
# loaded using the zero-extending MOV32rr.
# CHECK: DW_TAG_GNU_call_site_parameter
# CHECK-NEXT: DW_AT_location (DW_OP_reg5 RDI)
# CHECK-NEXT: DW_AT_GNU_call_site_value (DW_OP_breg3 RBX+0)
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