## Test the call site encoding in DWARF5 vs GNU extensions.
## === DWARF4, tune for gdb ===
# RUN: llc -emit-call-site-info -dwarf-version 4 -debugger-tune=gdb -filetype=obj \
# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-GNU -implicit-check-not=DW_AT_call
# === DWARF5, tune for gdb ===
# RUN: llc -dwarf-version 5 -debugger-tune=gdb -emit-call-site-info -filetype=obj \
# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call
## === DWARF4, tune for lldb ===
# RUN: llc -dwarf-version 4 -debugger-tune=lldb -emit-call-site-info -filetype=obj \
# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call
## === DWARF5, tune for lldb ===
# RUN: llc -dwarf-version 5 -debugger-tune=lldb -emit-call-site-info -filetype=obj \
# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call
## === DWARF4, tune for sce ===
# RUN: llc -emit-call-site-info -dwarf-version 4 -filetype=obj -debugger-tune=sce \
# RUN: -debug-entry-values -mtriple=x86_64-unknown-unknown \
# RUN: -start-after=machineverifier -o - %s | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-GNU
## === DWARF5, tune for sce ===
# RUN: llc -emit-call-site-info -dwarf-version 5 -filetype=obj -debugger-tune=sce \
# RUN: -debug-entry-values -mtriple=x86_64-unknown-unknown \
# RUN: -start-after=machineverifier -o - %s | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5
## This is based on the following reproducer:
##
## extern void fn();
## extern void fn2(int x);
## extern int fn3();
##
## int fn1(int (*fn4) ()) {
## fn();
## fn2(5);
##
## int x = (*fn4)();
## if (!x)
## return fn3();
## else
## return -1;
## }
## Check GNU extensions:
# CHECK-GNU: DW_TAG_subprogram
# CHECK-GNU: DW_AT_GNU_all_call_sites (true)
# CHECK-GNU: DW_TAG_GNU_call_site
# CHECK-GNU-NEXT: DW_AT_abstract_origin
# CHECK-GNU-NEXT: DW_AT_low_pc
# CHECK-GNU: DW_TAG_GNU_call_site_parameter
# CHECK-GNU-NEXT: DW_AT_location
# CHECK-GNU-NEXT: DW_AT_GNU_call_site_value
# CHECK-GNU: DW_TAG_GNU_call_site
# CHECK-GNU-NEXT: DW_AT_GNU_call_site_target
# CHECK-GNU-NEXT: DW_AT_low_pc
# CHECK-GNU: DW_TAG_GNU_call_site
# CHECK-GNU-NEXT: DW_AT_abstract_origin
# CHECK-GNU-NEXT: DW_AT_GNU_tail_call
# CHECK-GNU-NEXT: DW_AT_low_pc
## Check DWARF 5:
# CHECK-DWARF5: DW_TAG_subprogram
# CHECK-DWARF5: DW_AT_call_all_calls (true)
# CHECK-DWARF5: DW_TAG_call_site
# CHECK-DWARF5-NEXT: DW_AT_call_origin
# CHECK-DWARF5-NEXT: DW_AT_call_return_pc
# CHECK-DWARF5: DW_TAG_call_site
# CHECK-DWARF5-NEXT: DW_AT_call_origin
# CHECK-DWARF5-NEXT: DW_AT_call_return_pc
# CHECK-DWARF5: DW_TAG_call_site_parameter
# CHECK-DWARF5-NEXT: DW_AT_location
# CHECK-DWARF5-NEXT: DW_AT_call_value
# CHECK-DWARF5: DW_TAG_call_site
# CHECK-DWARF5-NEXT: DW_AT_call_target
# CHECK-DWARF5-NEXT: DW_AT_call_return_pc
# CHECK-DWARF5: DW_TAG_call_site
# CHECK-DWARF5-NEXT: DW_AT_call_origin
# CHECK-DWARF5-NEXT: DW_AT_call_tail_call
# CHECK-DWARF5-NEXT: DW_AT_call_pc
--- |
; ModuleID = 'call-site-attrs.c'
source_filename = "call-site-attrs.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: nounwind uwtable
define dso_local i32 @fn1(ptr nocapture %fn4) local_unnamed_addr !dbg !18 {
entry:
call void @llvm.dbg.value(metadata ptr %fn4, metadata !23, metadata !DIExpression()), !dbg !25
tail call void (...) @fn(), !dbg !26
tail call void @fn2(i32 5), !dbg !27
%call = tail call i32 (...) %fn4(), !dbg !28
call void @llvm.dbg.value(metadata i32 %call, metadata !24, metadata !DIExpression()), !dbg !25
%tobool = icmp eq i32 %call, 0, !dbg !29
br i1 %tobool, label %if.then, label %cleanup, !dbg !31
if.then: ; preds = %entry
%call1 = tail call i32 (...) @fn3(), !dbg !32
ret i32 %call1, !dbg !33
cleanup: ; preds = %entry
ret i32 -1, !dbg !33
}
declare !dbg !4 dso_local void @fn(...) local_unnamed_addr
declare !dbg !7 dso_local void @fn2(i32) local_unnamed_addr
declare !dbg !11 dso_local i32 @fn3(...) local_unnamed_addr
; Function Attrs: nounwind readnone speculatable willreturn
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!14, !15, !16}
!llvm.ident = !{!17}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "call-site-attrs.c", directory: "/")
!2 = !{}
!3 = !{!4, !7, !11}
!4 = !DISubprogram(name: "fn", scope: !1, file: !1, line: 1, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2)
!5 = !DISubroutineType(types: !6)
!6 = !{null, null}
!7 = !DISubprogram(name: "fn2", scope: !1, file: !1, line: 2, type: !8, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
!8 = !DISubroutineType(types: !9)
!9 = !{null, !10}
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !DISubprogram(name: "fn3", scope: !1, file: !1, line: 3, type: !12, spFlags: DISPFlagOptimized, retainedNodes: !2)
!12 = !DISubroutineType(types: !13)
!13 = !{!10, null}
!14 = !{i32 7, !"Dwarf Version", i32 4}
!15 = !{i32 2, !"Debug Info Version", i32 3}
!16 = !{i32 1, !"wchar_size", i32 4}
!17 = !{!"clang version 11.0.0"}
!18 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 5, type: !19, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !22)
!19 = !DISubroutineType(types: !20)
!20 = !{!10, !21}
!21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
!22 = !{!23, !24}
!23 = !DILocalVariable(name: "fn4", arg: 1, scope: !18, file: !1, line: 5, type: !21)
!24 = !DILocalVariable(name: "x", scope: !18, file: !1, line: 9, type: !10)
!25 = !DILocation(line: 0, scope: !18)
!26 = !DILocation(line: 6, column: 3, scope: !18)
!27 = !DILocation(line: 7, column: 3, scope: !18)
!28 = !DILocation(line: 9, column: 11, scope: !18)
!29 = !DILocation(line: 10, column: 8, scope: !30)
!30 = distinct !DILexicalBlock(scope: !18, file: !1, line: 10, column: 7)
!31 = !DILocation(line: 10, column: 7, scope: !18)
!32 = !DILocation(line: 11, column: 12, scope: !30)
!33 = !DILocation(line: 14, column: 1, scope: !18)
...
---
name: fn1
callSites:
- { bb: 0, offset: 7, fwdArgRegs: [] }
- { bb: 0, offset: 9, fwdArgRegs:
- { arg: 0, reg: '$edi' } }
- { bb: 0, offset: 11, fwdArgRegs: [] }
- { bb: 2, offset: 7, fwdArgRegs: [] }
body: |
bb.0.entry:
successors: %bb.2(0x30000000), %bb.1(0x50000000)
liveins: $rdi, $rbx
DBG_VALUE $rdi, $noreg, !23, !DIExpression(), debug-location !25
frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
CFI_INSTRUCTION offset $rbx, -16
$rbx = MOV64rr $rdi
DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !26
CALL64pcrel32 @fn, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, debug-location !26
$edi = MOV32ri 5, debug-location !27
CALL64pcrel32 @fn2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, debug-location !27
dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !28
CALL64r killed renamable $rbx, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !28
DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
TEST32rr killed renamable $eax, renamable $eax, implicit-def $eflags, debug-location !29
JCC_1 %bb.2, 4, implicit $eflags, debug-location !31
bb.1.cleanup:
DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
$eax = MOV32ri -1, debug-location !33
$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33
DBG_VALUE $rdi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !25
CFI_INSTRUCTION def_cfa_offset 8, debug-location !33
RET64 $eax, debug-location !33
bb.2.if.then:
CFI_INSTRUCTION def_cfa_offset 16, debug-location !32
DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !32
$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !32
DBG_VALUE $rdi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !25
CFI_INSTRUCTION def_cfa_offset 8, debug-location !32
TAILJMPd64 @fn3, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit $al, debug-location !32
...
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