| # RUN: llc %s -x mir -o - -mtriple=x86_64-unknown-unknown -run-pass=prologepilog | FileCheck %s |
| # |
| # Check when the DBG_VALUE on a stack slot below (for var "c") has its stack |
| # slot replaced with $rsp and a complex expression, it has DW_OP_stack_value |
| # added. A direct reference to the stack slot is considered to be the _address_ |
| # of that stack slot, wheras its contents would be an indirect DBG_VALUE. |
| # |
| # Check too that for the same DBG_VALUE inst, with an indirect reference to |
| # the stack slot, we do _not_ get DW_OP_plus_uconst added. This expression |
| # should remain indirect, referring to the contents of the stack slot. |
| # |
| # CHECK: ![[VAR:[0-9]+]] = !DILocalVariable(name: "c" |
| # CHECK: ![[VAR2:[0-9]+]] = !DILocalVariable(name: "asdf" |
| # CHECK: ![[VAR3:[0-9]+]] = !DILocalVariable(name: "bees" |
| # |
| # CHECK: LEA64r $rsp |
| # CHECK-NEXT: DBG_VALUE $rsp, $noreg, ![[VAR]], !DIExpression(DW_OP_plus_uconst, {{[0-9]+}}, DW_OP_stack_value) |
| # CHECK-NEXT: DBG_VALUE $rsp, $noreg, ![[VAR2]], !DIExpression(DW_OP_plus_uconst, {{[0-9]+}}, DW_OP_stack_value, DW_OP_LLVM_fragment, 1, 2) |
| # CHECK-NEXT: DBG_VALUE $rsp, $noreg, ![[VAR3]], !DIExpression(DW_OP_plus_uconst, {{[0-9]+}}, DW_OP_LLVM_tag_offset, 0, DW_OP_stack_value) |
| # CHECK-NEXT: DBG_VALUE 1834104526 |
| # CHECK-NEXT: MOV64mr |
| # CHECK-NEXT: DBG_VALUE $rsp, 0, ![[VAR]], !DIExpression(DW_OP_plus_uconst, {{[0-9]+}}) |
| |
| --- | |
| ; ModuleID = 'out.ll' |
| source_filename = "abc.c" |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @b = common dso_local local_unnamed_addr global i32* null, align 8, !dbg !0 |
| @a = common dso_local local_unnamed_addr global i32 0, align 4, !dbg !6 |
| |
| ; Function Attrs: nounwind uwtable |
| define dso_local i32 @main() local_unnamed_addr !dbg !14 { |
| entry: |
| %l_1081 = alloca i32, align 4 |
| %0 = bitcast i32* %l_1081 to i8*, !dbg !20 |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !20 |
| call void @llvm.dbg.value(metadata i32 1834104526, metadata !18, metadata !DIExpression()), !dbg !21 |
| call void @llvm.dbg.value(metadata i32* %l_1081, metadata !19, metadata !DIExpression()), !dbg !21 |
| store i32* %l_1081, i32** @b, align 8, !dbg !22, !tbaa !23 |
| store i32 9, i32* @a, align 4, !dbg !27, !tbaa !28 |
| store i32 9, i32* %l_1081, align 4, !dbg !30, !tbaa !28 |
| %call = call i32 (...) @optimize_me_not(), !dbg !31 |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %0), !dbg !32 |
| ret i32 0, !dbg !32 |
| } |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) |
| |
| declare dso_local i32 @optimize_me_not(...) local_unnamed_addr |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!10, !11, !12} |
| !llvm.ident = !{!13} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 2, type: !9, isLocal: false, isDefinition: true) |
| !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None) |
| !3 = !DIFile(filename: "abc.c", directory: ".") |
| !4 = !{} |
| !5 = !{!6, !0} |
| !6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression()) |
| !7 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true) |
| !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !9 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64) |
| !10 = !{i32 2, !"Dwarf Version", i32 4} |
| !11 = !{i32 2, !"Debug Info Version", i32 3} |
| !12 = !{i32 1, !"wchar_size", i32 4} |
| !13 = !{!"clang"} |
| !14 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !15, scopeLine: 3, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !17) |
| !15 = !DISubroutineType(types: !16) |
| !16 = !{!8} |
| !17 = !{!18, !19, !33, !34} |
| !18 = !DILocalVariable(name: "l_1081", scope: !14, file: !3, line: 4, type: !8) |
| !19 = !DILocalVariable(name: "c", scope: !14, file: !3, line: 5, type: !9) |
| !20 = !DILocation(line: 4, column: 3, scope: !14) |
| !21 = !DILocation(line: 0, scope: !14) |
| !22 = !DILocation(line: 6, column: 5, scope: !14) |
| !23 = !{!24, !24, i64 0} |
| !24 = !{!"any pointer", !25, i64 0} |
| !25 = !{!"omnipotent char", !26, i64 0} |
| !26 = !{!"Simple C/C++ TBAA"} |
| !27 = !DILocation(line: 7, column: 10, scope: !14) |
| !28 = !{!29, !29, i64 0} |
| !29 = !{!"int", !25, i64 0} |
| !30 = !DILocation(line: 7, column: 6, scope: !14) |
| !31 = !DILocation(line: 8, column: 3, scope: !14) |
| !32 = !DILocation(line: 9, column: 1, scope: !14) |
| !33 = !DILocalVariable(name: "asdf", scope: !14, file: !3, line: 4, type: !8) |
| !34 = !DILocalVariable(name: "bees", scope: !14, file: !3, line: 4, type: !8) |
| |
| ... |
| --- |
| name: main |
| alignment: 4 |
| tracksRegLiveness: true |
| frameInfo: |
| maxAlignment: 4 |
| hasCalls: true |
| stack: |
| - { id: 0, name: l_1081, type: default, offset: 0, size: 4, alignment: 4, |
| callee-saved-register: '', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| body: | |
| bb.0.entry: |
| renamable $rax = LEA64r %stack.0.l_1081, 1, $noreg, 0, $noreg |
| DBG_VALUE %stack.0.l_1081, $noreg, !19, !DIExpression(), debug-location !21 |
| DBG_VALUE %stack.0.l_1081, $noreg, !33, !DIExpression(DW_OP_LLVM_fragment, 1, 2), debug-location !21 |
| DBG_VALUE %stack.0.l_1081, $noreg, !34, !DIExpression(DW_OP_LLVM_tag_offset, 0), debug-location !21 |
| DBG_VALUE 1834104526, $noreg, !18, !DIExpression(), debug-location !21 |
| MOV64mr $rip, 1, $noreg, @b, $noreg, killed renamable $rax, debug-location !22 :: (store 8 into @b, !tbaa !23) |
| DBG_VALUE %stack.0.l_1081, 0, !19, !DIExpression(), debug-location !21 |
| MOV32mi $rip, 1, $noreg, @a, $noreg, 9, debug-location !27 :: (store 4 into @a, !tbaa !28) |
| MOV32mi %stack.0.l_1081, 1, $noreg, 0, $noreg, 9, debug-location !30 :: (store 4 into %ir.l_1081, !tbaa !28) |
| ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !31 |
| dead $eax = MOV32r0 implicit-def dead $eflags, implicit-def $al, debug-location !31 |
| CALL64pcrel32 @optimize_me_not, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, implicit-def dead $eax, debug-location !31 |
| ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !31 |
| $eax = MOV32r0 implicit-def dead $eflags, debug-location !32 |
| RET 0, $eax, debug-location !32 |
| |
| ... |
