pr19307.mir
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# RUN: llc -o - %s -start-after=patchable-function -O0 | FileCheck %s
# Generated from the source file pr19307.cc:
# #include <string>
# void parse_range(unsigned long long &offset, unsigned long long &limit,
# std::string range) {
# if (range.compare(0, 6, "items=") != 0 || range[6] == '-')
# offset = 1;
# range.erase(0, 6);
# limit = 2;
# }
# with "clang++ -S -emit-llvm -O0 -g pr19307.cc"
#
# Location of "range" string is spilled from %rdx to stack and is
# addressed via %rbp.
# CHECK: movq %rdx, {{[-0-9]+}}(%rbp)
# CHECK-NEXT: [[START_LABEL:.Ltmp[0-9]+]]:
# This location should be valid until the end of the function.
#
# Verify that we have proper range in debug_loc section:
# CHECK: .Ldebug_loc{{[0-9]+}}:
# CHECK: DW_OP_breg1
# CHECK: .quad [[START_LABEL]]-.Lfunc_begin0
# CHECK-NEXT: .quad .Lfunc_end0-.Lfunc_begin0
# CHECK: DW_OP_breg6
# CHECK: DW_OP_deref
--- |
target triple = "x86_64-unknown-linux-gnu"
%"class.std::basic_string" = type { %"struct.std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider" }
%"struct.std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider" = type { i8* }
@.str = private unnamed_addr constant [7 x i8] c"items=\00", align 1
; Function Attrs: uwtable
define void @_Z11parse_rangeRyS_Ss(i64* %offset, i64* %limit, %"class.std::basic_string"* %range) #0 !dbg !34 {
entry:
%offset.addr = alloca i64*, align 8
%limit.addr = alloca i64*, align 8
store i64* %offset, i64** %offset.addr, align 8
call void @llvm.dbg.declare(metadata i64** %offset.addr, metadata !41, metadata !DIExpression()), !dbg !42
store i64* %limit, i64** %limit.addr, align 8
call void @llvm.dbg.declare(metadata i64** %limit.addr, metadata !43, metadata !DIExpression()), !dbg !42
call void @llvm.dbg.declare(metadata %"class.std::basic_string"* %range, metadata !44, metadata !DIExpression(DW_OP_deref)), !dbg !45
%call = call i32 @_ZNKSs7compareEmmPKc(%"class.std::basic_string"* %range, i64 0, i64 6, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i32 0, i32 0)), !dbg !46
%cmp = icmp ne i32 %call, 0, !dbg !46
br i1 %cmp, label %if.then, label %lor.lhs.false, !dbg !46
lor.lhs.false: ; preds = %entry
%call1 = call i8* @_ZNSsixEm(%"class.std::basic_string"* %range, i64 6), !dbg !48
%0 = load i8, i8* %call1, !dbg !48
%conv = sext i8 %0 to i32, !dbg !48
%cmp2 = icmp eq i32 %conv, 45, !dbg !48
br i1 %cmp2, label %if.then, label %if.end, !dbg !48
if.then: ; preds = %lor.lhs.false, %entry
%1 = load i64*, i64** %offset.addr, align 8, !dbg !50
store i64 1, i64* %1, align 8, !dbg !50
br label %if.end, !dbg !50
if.end: ; preds = %if.then, %lor.lhs.false
%call3 = call %"class.std::basic_string"* @_ZNSs5eraseEmm(%"class.std::basic_string"* %range, i64 0, i64 6), !dbg !51
%2 = load i64*, i64** %limit.addr, align 8, !dbg !52
store i64 2, i64* %2, align 8, !dbg !52
ret void, !dbg !53
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare i32 @_ZNKSs7compareEmmPKc(%"class.std::basic_string"*, i64, i64, i8*) #2
declare i8* @_ZNSsixEm(%"class.std::basic_string"*, i64) #2
declare %"class.std::basic_string"* @_ZNSs5eraseEmm(%"class.std::basic_string"*, i64, i64) #2
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #3
attributes #0 = { uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone speculatable }
attributes #2 = { "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #3 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!31, !32}
!llvm.ident = !{!33}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.5.0 (209308)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, globals: !2, imports: !11)
!1 = !DIFile(filename: "pr19307.cc", directory: "/llvm_cmake_gcc")
!2 = !{}
!3 = !{!4, !6, !8}
!4 = !DICompositeType(tag: DW_TAG_structure_type, file: !5, line: 83, flags: DIFlagFwdDecl, identifier: "_ZTS11__mbstate_t")
!5 = !DIFile(filename: "/usr/include/wchar.h", directory: "/llvm_cmake_gcc")
!6 = !DICompositeType(tag: DW_TAG_structure_type, name: "lconv", file: !7, line: 54, flags: DIFlagFwdDecl, identifier: "_ZTS5lconv")
!7 = !DIFile(filename: "/usr/include/locale.h", directory: "/llvm_cmake_gcc")
!8 = !DICompositeType(tag: DW_TAG_class_type, name: "basic_string<char, std::char_traits<char>, std::allocator<char> >", scope: !10, file: !9, line: 1134, flags: DIFlagFwdDecl, identifier: "_ZTSSs")
!9 = !DIFile(filename: "/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/bits/basic_string.tcc", directory: "/llvm_cmake_gcc")
!10 = !DINamespace(name: "std", scope: null)
!11 = !{!12, !15, !18, !22, !27, !30}
!12 = !DIImportedEntity(tag: DW_TAG_imported_module, scope: !13, entity: !14, file: !1, line: 57)
!13 = !DINamespace(name: "__gnu_debug", scope: null)
!14 = !DINamespace(name: "__debug", scope: !10)
!15 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !10, entity: !16, file: !1, line: 66)
!16 = !DIDerivedType(tag: DW_TAG_typedef, name: "mbstate_t", file: !5, line: 106, baseType: !17)
!17 = !DIDerivedType(tag: DW_TAG_typedef, name: "__mbstate_t", file: !5, line: 95, baseType: !4)
!18 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !10, entity: !19, file: !1, line: 141)
!19 = !DIDerivedType(tag: DW_TAG_typedef, name: "wint_t", file: !20, line: 141, baseType: !21)
!20 = !DIFile(filename: "/llvm_cmake_gcc/bin/../lib/clang/3.5.0/include/stddef.h", directory: "/llvm_cmake_gcc")
!21 = !DIBasicType(name: "unsigned int", size: 32, align: 32, encoding: DW_ATE_unsigned)
!22 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !23, entity: !24, file: !1, line: 42)
!23 = !DINamespace(name: "__gnu_cxx", scope: null)
!24 = !DIDerivedType(tag: DW_TAG_typedef, name: "size_t", scope: !10, file: !25, line: 155, baseType: !26)
!25 = !DIFile(filename: "/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/x86_64-linux-gnu/bits/c++config.h", directory: "/llvm_cmake_gcc")
!26 = !DIBasicType(name: "long unsigned int", size: 64, align: 64, encoding: DW_ATE_unsigned)
!27 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !23, entity: !28, file: !1, line: 43)
!28 = !DIDerivedType(tag: DW_TAG_typedef, name: "ptrdiff_t", scope: !10, file: !25, line: 156, baseType: !29)
!29 = !DIBasicType(name: "long int", size: 64, align: 64, encoding: DW_ATE_signed)
!30 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !10, entity: !6, file: !1, line: 55)
!31 = !{i32 2, !"Dwarf Version", i32 4}
!32 = !{i32 2, !"Debug Info Version", i32 3}
!33 = !{!"clang version 3.5.0 (209308)"}
!34 = distinct !DISubprogram(name: "parse_range", linkageName: "_Z11parse_rangeRyS_Ss", scope: !1, file: !1, line: 3, type: !35, isLocal: false, isDefinition: true, scopeLine: 4, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
!35 = !DISubroutineType(types: !36)
!36 = !{null, !37, !37, !39}
!37 = !DIDerivedType(tag: DW_TAG_reference_type, baseType: !38)
!38 = !DIBasicType(name: "long long unsigned int", size: 64, align: 64, encoding: DW_ATE_unsigned)
!39 = !DIDerivedType(tag: DW_TAG_typedef, name: "string", scope: !10, file: !40, line: 65, baseType: !8)
!40 = !DIFile(filename: "/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/bits/stringfwd.h", directory: "/llvm_cmake_gcc")
!41 = !DILocalVariable(name: "offset", arg: 1, scope: !34, file: !1, line: 3, type: !37)
!42 = !DILocation(line: 3, scope: !34)
!43 = !DILocalVariable(name: "limit", arg: 2, scope: !34, file: !1, line: 3, type: !37)
!44 = !DILocalVariable(name: "range", arg: 3, scope: !34, file: !1, line: 4, type: !39)
!45 = !DILocation(line: 4, scope: !34)
!46 = !DILocation(line: 5, scope: !47)
!47 = distinct !DILexicalBlock(scope: !34, file: !1, line: 5)
!48 = !DILocation(line: 5, scope: !49)
!49 = distinct !DILexicalBlock(scope: !47, file: !1, line: 5)
!50 = !DILocation(line: 6, scope: !47)
!51 = !DILocation(line: 7, scope: !34)
!52 = !DILocation(line: 8, scope: !34)
!53 = !DILocation(line: 9, scope: !34)
...
---
name: _Z11parse_rangeRyS_Ss
alignment: 16
tracksRegLiveness: true
liveins:
- { reg: '$rdi' }
- { reg: '$rsi' }
- { reg: '$rdx' }
frameInfo:
stackSize: 40
offsetAdjustment: -32
maxAlignment: 8
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
fixedStack:
- { id: 0, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default }
stack:
- { id: 0, name: offset.addr, offset: -24, size: 8, alignment: 8, stack-id: default,
debug-info-variable: '!41', debug-info-expression: '!DIExpression()',
debug-info-location: '!42' }
- { id: 1, name: limit.addr, offset: -32, size: 8, alignment: 8, stack-id: default,
debug-info-variable: '!43', debug-info-expression: '!DIExpression()',
debug-info-location: '!42' }
- { id: 2, type: spill-slot, offset: -40, size: 8, alignment: 8, stack-id: default }
- { id: 3, type: spill-slot, offset: -48, size: 8, alignment: 8, stack-id: default }
body: |
bb.0.entry:
liveins: $rdi, $rsi, $rdx
frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
CFI_INSTRUCTION offset $rbp, -16
$rbp = frame-setup MOV64rr $rsp
CFI_INSTRUCTION def_cfa_register $rbp
$rsp = frame-setup SUB64ri8 $rsp, 32, implicit-def dead $eflags
$eax = XOR32rr undef $eax, undef $eax, implicit-def $eflags, implicit-def $rax
MOV64mr $rbp, 1, $noreg, -8, $noreg, killed renamable $rdi :: (store 8 into %ir.offset.addr)
MOV64mr $rbp, 1, $noreg, -16, $noreg, killed renamable $rsi :: (store 8 into %ir.limit.addr)
DBG_VALUE renamable $rdx, 0, !44, !DIExpression(DW_OP_deref), debug-location !45
$rdi = MOV64rr $rdx, debug-location !46
$rsi = MOV64rr killed $rax, debug-location !46
$eax = MOV32ri 6, implicit-def $rax, debug-location !46
MOV64mr $rbp, 1, $noreg, -24, $noreg, killed $rdx :: (store 8 into %stack.2)
DBG_VALUE $rbp, 0, !44, !DIExpression(DW_OP_constu, 24, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !45
$rdx = MOV64rr killed $rax, debug-location !46
renamable $rcx = MOV64ri @.str, debug-location !46
CALL64pcrel32 @_ZNKSs7compareEmmPKc, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit killed $rsi, implicit killed $rdx, implicit killed $rcx, implicit-def $eax, debug-location !46
CMP32ri8 killed renamable $eax, 0, implicit-def $eflags, debug-location !46
JCC_1 %bb.2, 5, implicit $eflags, debug-location !46
bb.1.lor.lhs.false:
DBG_VALUE $rbp, 0, !44, !DIExpression(DW_OP_constu, 24, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !45
$rdi = MOV64rm $rbp, 1, $noreg, -24, $noreg :: (load 8 from %stack.2)
$esi = MOV32ri 6, implicit-def $rsi, debug-location !48
CALL64pcrel32 @_ZNSsixEm, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit killed $rsi, implicit-def $rax, debug-location !48
renamable $ecx = MOVSX32rm8 killed renamable $rax, 1, $noreg, 0, $noreg, debug-location !48 :: (load 1 from %ir.call1)
CMP32ri8 killed renamable $ecx, 45, implicit-def $eflags, debug-location !48
JCC_1 %bb.3, 5, implicit $eflags, debug-location !48
bb.2.if.then:
DBG_VALUE $rbp, 0, !44, !DIExpression(DW_OP_constu, 24, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !45
renamable $rax = MOV64rm $rbp, 1, $noreg, -8, $noreg, debug-location !50 :: (load 8 from %ir.offset.addr)
MOV64mi32 killed renamable $rax, 1, $noreg, 0, $noreg, 1, debug-location !50 :: (store 8 into %ir.1)
bb.3.if.end:
DBG_VALUE $rbp, 0, !44, !DIExpression(DW_OP_constu, 24, DW_OP_minus, DW_OP_deref, DW_OP_deref), debug-location !45
$esi = XOR32rr undef $esi, undef $esi, implicit-def $eflags, implicit-def $rsi
$rdi = MOV64rm $rbp, 1, $noreg, -24, $noreg :: (load 8 from %stack.2)
$edx = MOV32ri 6, implicit-def $rdx, debug-location !51
CALL64pcrel32 @_ZNSs5eraseEmm, csr_64, implicit $rsp, implicit $ssp, implicit killed $rdi, implicit killed $rsi, implicit killed $rdx, implicit-def $rax, debug-location !51
renamable $rdx = MOV64rm $rbp, 1, $noreg, -16, $noreg, debug-location !52 :: (load 8 from %ir.limit.addr)
MOV64mi32 killed renamable $rdx, 1, $noreg, 0, $noreg, 2, debug-location !52 :: (store 8 into %ir.2)
MOV64mr $rbp, 1, $noreg, -32, $noreg, killed $rax :: (store 8 into %stack.3)
$rsp = frame-destroy ADD64ri8 $rsp, 32, implicit-def dead $eflags, debug-location !53
$rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !53
CFI_INSTRUCTION def_cfa $rsp, 8, debug-location !53
RETQ debug-location !53
...