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llvm-project/llvm/test/DebugInfo/X86/spill-indirect-nrvo.ll

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Re-land "[DebugInfo] Insert DW_OP_deref when spilling indirect DBG_VALUEs" After r313775, it's easier to maintain a parallel BitVector of spilled locations indexed by location number. I wasn't able to build a good reduced test case for this iteration of the bug, but I added a more direct assertion that spilled values must use frame index locations. If this bug reappears, it won't only fire on the NEON vector code that we detected it on, but on medium-sized integer-only programs as well. llvm-svn: 313786
2017-09-21 02:19:08 +08:00
; RUN: llc < %s | FileCheck %s
; RUN: llc -O0 < %s | FileCheck %s
; Make sure we insert DW_OP_deref when spilling indirect DBG_VALUE instructions.
; C++ source:
; #define FORCE_SPILL() \
; __asm volatile("" : : : \
; "rax", "rbx", "rcx", "rdx", "rsi", "rdi", "rbp", "r8", \
; "r9", "r10", "r11", "r12", "r13", "r14", "r15")
; struct string {
; string();
; string(int i);
; ~string();
; int i = 0;
; };
; string get_string() {
; string result = 3;
; FORCE_SPILL();
; return result;
; }
; CHECK-LABEL: _Z10get_stringv:
[CodeGen] Print register names in lowercase in both MIR and debug output As part of the unification of the debug format and the MIR format, always print registers as lowercase. * Only debug printing is affected. It now follows MIR. Differential Revision: https://reviews.llvm.org/D40417 llvm-svn: 319187
2017-11-29 01:15:09 +08:00
; CHECK: #DEBUG_VALUE: get_string:result <- [%rdi+0]
Re-land "[DebugInfo] Insert DW_OP_deref when spilling indirect DBG_VALUEs" After r313775, it's easier to maintain a parallel BitVector of spilled locations indexed by location number. I wasn't able to build a good reduced test case for this iteration of the bug, but I added a more direct assertion that spilled values must use frame index locations. If this bug reappears, it won't only fire on the NEON vector code that we detected it on, but on medium-sized integer-only programs as well. llvm-svn: 313786
2017-09-21 02:19:08 +08:00
; CHECK: movq %rdi, [[OFFS:[0-9]+]](%rsp) # 8-byte Spill
[CodeGen] Print register names in lowercase in both MIR and debug output As part of the unification of the debug format and the MIR format, always print registers as lowercase. * Only debug printing is affected. It now follows MIR. Differential Revision: https://reviews.llvm.org/D40417 llvm-svn: 319187
2017-11-29 01:15:09 +08:00
; CHECK: #DEBUG_VALUE: get_string:result <- [DW_OP_plus_uconst [[OFFS]], DW_OP_deref] [%rsp+0]
Re-land "[DebugInfo] Insert DW_OP_deref when spilling indirect DBG_VALUEs" After r313775, it's easier to maintain a parallel BitVector of spilled locations indexed by location number. I wasn't able to build a good reduced test case for this iteration of the bug, but I added a more direct assertion that spilled values must use frame index locations. If this bug reappears, it won't only fire on the NEON vector code that we detected it on, but on medium-sized integer-only programs as well. llvm-svn: 313786
2017-09-21 02:19:08 +08:00
; CHECK: callq _ZN6stringC1Ei
; CHECK: #APP
; CHECK: #NO_APP
; ModuleID = 't.cpp'
source_filename = "t.cpp"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64--linux"
%struct.string = type { i32 }
; Function Attrs: uwtable
define void @_Z10get_stringv(%struct.string* noalias sret %agg.result) #0 !dbg !7 {
entry:
%nrvo = alloca i1, align 1
store i1 false, i1* %nrvo, align 1, !dbg !24
call void @llvm.dbg.declare(metadata %struct.string* %agg.result, metadata !23, metadata !DIExpression()), !dbg !25
call void @_ZN6stringC1Ei(%struct.string* %agg.result, i32 3), !dbg !26
call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"() #3, !dbg !27, !srcloc !28
store i1 true, i1* %nrvo, align 1, !dbg !29
%nrvo.val = load i1, i1* %nrvo, align 1, !dbg !30
br i1 %nrvo.val, label %nrvo.skipdtor, label %nrvo.unused, !dbg !30
nrvo.unused: ; preds = %entry
call void @_ZN6stringD1Ev(%struct.string* %agg.result), !dbg !30
br label %nrvo.skipdtor, !dbg !30
nrvo.skipdtor: ; preds = %nrvo.unused, %entry
ret void, !dbg !30
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare void @_ZN6stringC1Ei(%struct.string*, i32) unnamed_addr
declare void @_ZN6stringD1Ev(%struct.string*) unnamed_addr
attributes #0 = { uwtable }
attributes #1 = { nounwind readnone speculatable }
attributes #3 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5}
!llvm.ident = !{!6}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "t.cpp", directory: "C:\5Csrc\5Cllvm-project\5Cbuild")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{!"clang version 6.0.0 "}
!7 = distinct !DISubprogram(name: "get_string", linkageName: "_Z10get_stringv", scope: !1, file: !1, line: 13, type: !8, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !22)
!8 = !DISubroutineType(types: !9)
!9 = !{!10}
!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "string", file: !1, line: 7, size: 32, elements: !11, identifier: "_ZTS6string")
!11 = !{!12, !14, !18, !21}
!12 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !10, file: !1, line: 11, baseType: !13, size: 32)
!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!14 = !DISubprogram(name: "string", scope: !10, file: !1, line: 8, type: !15, isLocal: false, isDefinition: false, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: true)
!15 = !DISubroutineType(types: !16)
!16 = !{null, !17}
!17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
!18 = !DISubprogram(name: "string", scope: !10, file: !1, line: 9, type: !19, isLocal: false, isDefinition: false, scopeLine: 9, flags: DIFlagPrototyped, isOptimized: true)
!19 = !DISubroutineType(types: !20)
!20 = !{null, !17, !13}
!21 = !DISubprogram(name: "~string", scope: !10, file: !1, line: 10, type: !15, isLocal: false, isDefinition: false, scopeLine: 10, flags: DIFlagPrototyped, isOptimized: true)
!22 = !{!23}
!23 = !DILocalVariable(name: "result", scope: !7, file: !1, line: 14, type: !10)
!24 = !DILocation(line: 14, column: 3, scope: !7)
!25 = !DILocation(line: 14, column: 10, scope: !7)
!26 = !DILocation(line: 14, column: 19, scope: !7)
!27 = !DILocation(line: 15, column: 3, scope: !7)
!28 = !{i32 -2147471175}
!29 = !DILocation(line: 16, column: 3, scope: !7)
!30 = !DILocation(line: 17, column: 1, scope: !7)