/
single-location-interrupted-scope.mir
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single-location-interrupted-scope.mir
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# RUN: llc -start-after=livedebugvalues --filetype=obj %s -o - \
# RUN: | llvm-dwarfdump -v -name=parama - | FileCheck %s
#
# Generated with -O2, llc -stop-after=livedebugvalues, with IR modified from
# this source:
#
# int globa, globb;
# void ext();
# static void set(int parama, int paramb) {
# globa = parama;
# globb = paramb;
# }
# void funone(int one, int two) {
# two = two + one;
# // 'two = ...' sunk between the inlined assignments to globa and globa.
# set(one, two);
# if (two > 0)
# return ext();
# }
# void funtwo(int one, int two) {
# two = one + two;
# // 'two = ...' sunk between the inlined assignments to globa and globa,
# // and rdi is clobbered by the sunk 'two = ...'.
# set(one, two);
# if (one < two)
# return ext();
# }
#
# Check that the 'parama' is available for the entire inlined scope in funone,
# and that it is unavailable in the second DW_AT_ranges segment of the inlined
# scope in funtwo. In both cases the inlined scope 'set' is intrerrupted by an
# instruction from the calling function.
#
# Except for 'parama', all DILocalVariable metadata has been removed.
#
# Ignore first entry (abstract), we want to look at the concrete instances.
# CHECK: DW_TAG_formal_parameter [
# CHECK: DW_TAG_formal_parameter [
# CHECK-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_reg5 RDI)
# CHECK-NEXT: DW_AT_abstract_origin {{.*}} "parama"
# CHECK: DW_TAG_formal_parameter [
# CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset]
# CHECK-NEXT: [0x{{[0-9a-b]+}}, 0x{{[0-9a-b]+}})
# CHECK-NEXT: DW_AT_abstract_origin {{.*}} "parama"
--- |
target triple = "x86_64-unknown-linux-gnu"
@globa = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0
@globb = dso_local local_unnamed_addr global i32 0, align 4, !dbg !10
declare !dbg !6 dso_local void @ext(...) local_unnamed_addr
declare void @llvm.dbg.value(metadata, metadata, metadata)
define dso_local void @funone(i32 %one, i32 %two) local_unnamed_addr !dbg !17 {
entry:
call void @llvm.dbg.value(metadata i32 %one, metadata !20, metadata !DIExpression()), !dbg !23
store i32 %one, i32* @globa, align 4, !dbg !25
%add = add nsw i32 %two, %one, !dbg !30
store i32 %add, i32* @globb, align 4, !dbg !31
%cmp = icmp sgt i32 %add, 0, !dbg !32
br i1 %cmp, label %if.then, label %if.end, !dbg !34
if.then: ; preds = %entry
tail call void (...) @ext(), !dbg !35
ret void, !dbg !36
if.end: ; preds = %entry
ret void, !dbg !36
}
define dso_local void @funtwo(i32 %one, i32 %two) local_unnamed_addr !dbg !37 {
entry:
call void @llvm.dbg.value(metadata i32 %one, metadata !20, metadata !DIExpression()), !dbg !41
store i32 %one, i32* @globa, align 4, !dbg !43
%add = add nsw i32 %two, %one, !dbg !44
store i32 %add, i32* @globb, align 4, !dbg !45
%cmp = icmp sgt i32 %two, 0, !dbg !46
br i1 %cmp, label %if.then, label %if.end, !dbg !48
if.then: ; preds = %entry
tail call void (...) @ext(), !dbg !49
ret void, !dbg !50
if.end: ; preds = %entry
ret void, !dbg !50
}
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!13, !14, !15}
!llvm.ident = !{!16}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "globa", scope: !2, file: !3, line: 16, type: !12, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !5, globals: !9, splitDebugInlining: false, nameTableKind: None)
!3 = !DIFile(filename: "test.c", directory: "/")
!4 = !{}
!5 = !{!6}
!6 = !DISubprogram(name: "ext", scope: !3, file: !3, line: 17, type: !7, spFlags: DISPFlagOptimized, retainedNodes: !4)
!7 = !DISubroutineType(types: !8)
!8 = !{null, null}
!9 = !{!0, !10}
!10 = !DIGlobalVariableExpression(var: !11, expr: !DIExpression())
!11 = distinct !DIGlobalVariable(name: "globb", scope: !2, file: !3, line: 16, type: !12, isLocal: false, isDefinition: true)
!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!13 = !{i32 7, !"Dwarf Version", i32 4}
!14 = !{i32 2, !"Debug Info Version", i32 3}
!15 = !{i32 1, !"wchar_size", i32 4}
!16 = !{!"clang version 11.0.0"}
!17 = distinct !DISubprogram(name: "funone", scope: !3, file: !3, line: 22, type: !18, scopeLine: 22, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !4)
!18 = !DISubroutineType(types: !19)
!19 = !{null, !12, !12}
!20 = !DILocalVariable(name: "parama", arg: 1, scope: !21, file: !3, line: 18, type: !12)
!21 = distinct !DISubprogram(name: "set", scope: !3, file: !3, line: 18, type: !18, scopeLine: 18, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !22)
!22 = !{!20}
!23 = !DILocation(line: 0, scope: !21, inlinedAt: !24)
!24 = distinct !DILocation(line: 24, column: 3, scope: !17)
!25 = !DILocation(line: 19, column: 9, scope: !21, inlinedAt: !24)
!30 = !DILocation(line: 23, column: 13, scope: !17)
!31 = !DILocation(line: 20, column: 9, scope: !21, inlinedAt: !24)
!32 = !DILocation(line: 25, column: 11, scope: !33)
!33 = distinct !DILexicalBlock(scope: !17, file: !3, line: 25, column: 7)
!34 = !DILocation(line: 25, column: 7, scope: !17)
!35 = !DILocation(line: 26, column: 12, scope: !33)
!36 = !DILocation(line: 27, column: 1, scope: !17)
!37 = distinct !DISubprogram(name: "funtwo", scope: !3, file: !3, line: 28, type: !18, scopeLine: 28, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !38)
!38 = !{}
!41 = !DILocation(line: 0, scope: !21, inlinedAt: !42)
!42 = distinct !DILocation(line: 30, column: 3, scope: !37)
!43 = !DILocation(line: 19, column: 9, scope: !21, inlinedAt: !42)
!44 = !DILocation(line: 29, column: 13, scope: !37)
!45 = !DILocation(line: 20, column: 9, scope: !21, inlinedAt: !42)
!46 = !DILocation(line: 31, column: 11, scope: !47)
!47 = distinct !DILexicalBlock(scope: !37, file: !3, line: 31, column: 7)
!48 = !DILocation(line: 31, column: 7, scope: !37)
!49 = !DILocation(line: 32, column: 12, scope: !47)
!50 = !DILocation(line: 33, column: 1, scope: !37)
...
---
name: funone
body: |
bb.0.entry:
successors: %bb.2(0x50000000), %bb.1(0x30000000)
liveins: $edi, $esi
DBG_VALUE $edi, $noreg, !20, !DIExpression(), debug-location !23
MOV32mr $rip, 1, $noreg, @globa, $noreg, renamable $edi, debug-location !25 :: (store 4 into @globa)
renamable $esi = ADD32rr killed renamable $esi, killed renamable $edi, implicit-def $eflags, debug-location !32
MOV32mr $rip, 1, $noreg, @globb, $noreg, killed renamable $esi, debug-location !31 :: (store 4 into @globb)
JCC_1 %bb.1, 14, implicit $eflags, debug-location !34
bb.2.if.then:
dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !35
TAILJMPd64 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit killed $al, debug-location !35
bb.1.if.end:
RETQ debug-location !36
...
---
name: funtwo
body: |
bb.0.entry:
successors: %bb.2(0x50000000), %bb.1(0x30000000)
liveins: $edi, $esi
DBG_VALUE $edi, $noreg, !20, !DIExpression(), debug-location !41
MOV32mr $rip, 1, $noreg, @globa, $noreg, renamable $edi, debug-location !43 :: (store 4 into @globa)
renamable $edi = nsw ADD32rr killed renamable $edi, renamable $esi, implicit-def dead $eflags, debug-location !44
MOV32mr $rip, 1, $noreg, @globb, $noreg, killed renamable $edi, debug-location !45 :: (store 4 into @globb)
TEST32rr killed renamable $esi, renamable $esi, implicit-def $eflags, debug-location !46
JCC_1 %bb.1, 14, implicit $eflags, debug-location !48
bb.2.if.then:
dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !49
TAILJMPd64 @ext, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit killed $al, debug-location !49
bb.1.if.end:
RETQ debug-location !50
...