| ; $ clang++ -S -emit-llvm -o - -gdwarf-5 -o - -O1 tail2.cc |
| ; volatile int sink; |
| ; void __attribute__((noinline)) bat() { sink++; } |
| ; void __attribute__((noinline)) bar() { sink++; } |
| ; void __attribute__((noinline)) foo() { |
| ; bar(); bat(); |
| ; bar(); bat(); |
| ; } |
| ; int __attribute__((disable_tail_calls)) main() { foo(); } |
| |
| ; On Windows, we don't handle the relocations needed for AT_return_pc properly |
| ; and fail with "failed to compute relocation: IMAGE_REL_AMD64_ADDR32". |
| ; UNSUPPORTED: target={{.*-(cygwin|windows-gnu|windows-msvc)}} |
| |
| ; RUN: llc -mtriple=x86_64 < %s -o - | FileCheck %s -check-prefix=ASM |
| ; RUN: llc -mtriple=x86_64 -debugger-tune=lldb < %s -filetype=obj -o %t.o |
| ; RUN: llvm-dwarfdump %t.o -o - | FileCheck %s -check-prefix=OBJ -implicit-check-not=DW_TAG_call -implicit-check-not=DW_AT_call |
| ; RUN: llvm-dwarfdump -verify %t.o 2>&1 | FileCheck %s -check-prefix=VERIFY |
| ; RUN: llvm-dwarfdump -statistics %t.o | FileCheck %s -check-prefix=STATS |
| ; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis -o /dev/null |
| |
| ; VERIFY: No errors. |
| ; STATS: "#call site DIEs": 6, |
| |
| @sink = global i32 0, align 4, !dbg !0 |
| |
| define void @__has_no_subprogram() { |
| entry: |
| %0 = load volatile i32, ptr @sink, align 4 |
| %inc = add nsw i32 %0, 1 |
| store volatile i32 %inc, ptr @sink, align 4 |
| ret void |
| } |
| |
| ; ASM: DW_TAG_subprogram |
| ; ASM: DW_AT_call_all_calls |
| ; OBJ: [[bat_sp:.*]]: DW_TAG_subprogram |
| ; OBJ: DW_AT_call_all_calls (true) |
| ; OBJ: DW_AT_name ("bat") |
| define void @_Z3batv() !dbg !13 { |
| entry: |
| %0 = load volatile i32, ptr @sink, align 4, !dbg !16, !tbaa !17 |
| %inc = add nsw i32 %0, 1, !dbg !16 |
| store volatile i32 %inc, ptr @sink, align 4, !dbg !16, !tbaa !17 |
| ret void, !dbg !21 |
| } |
| |
| ; ASM: DW_TAG_subprogram |
| ; ASM: DW_AT_call_all_calls |
| ; OBJ: [[bar_sp:.*]]: DW_TAG_subprogram |
| ; OBJ: DW_AT_call_all_calls (true) |
| ; OBJ: DW_AT_name ("bar") |
| define void @_Z3barv() !dbg !22 { |
| entry: |
| %0 = load volatile i32, ptr @sink, align 4, !dbg !23, !tbaa !17 |
| %inc = add nsw i32 %0, 1, !dbg !23 |
| store volatile i32 %inc, ptr @sink, align 4, !dbg !23, !tbaa !17 |
| ret void, !dbg !24 |
| } |
| |
| ; ASM: DW_TAG_subprogram |
| ; ASM: DW_AT_call_all_calls |
| ; OBJ: [[foo_sp:.*]]: DW_TAG_subprogram |
| ; OBJ: DW_AT_call_all_calls (true) |
| ; OBJ: DW_AT_name ("foo") |
| ; OBJ: DW_TAG_call_site |
| ; OBJ: DW_AT_call_origin ([[bar_sp]]) |
| ; OBJ: DW_AT_call_return_pc |
| ; OBJ: DW_TAG_call_site |
| ; OBJ: DW_AT_call_origin ([[bat_sp]]) |
| ; OBJ: DW_AT_call_return_pc |
| ; OBJ: DW_TAG_call_site |
| ; OBJ: DW_AT_call_origin ([[bar_sp]]) |
| ; OBJ: DW_AT_call_return_pc |
| ; OBJ: DW_TAG_call_site |
| ; OBJ: DW_AT_call_origin ([[bat_sp]]) |
| ; OBJ: DW_AT_call_tail_call |
| ; OBJ: DW_AT_call_pc |
| define void @_Z3foov() !dbg !25 { |
| entry: |
| tail call void @__has_no_subprogram() |
| tail call void @_Z3barv(), !dbg !26 |
| tail call void @_Z3batv(), !dbg !27 |
| tail call void @_Z3barv(), !dbg !26 |
| tail call void @_Z3batv(), !dbg !27 |
| ret void, !dbg !28 |
| } |
| |
| ; ASM: DW_TAG_subprogram |
| ; ASM: DW_AT_call_all_calls |
| ; OBJ: DW_TAG_subprogram |
| ; OBJ: DW_AT_call_all_calls (true) |
| ; OBJ: DW_AT_name ("main") |
| ; OBJ: DW_TAG_call_site |
| ; OBJ: DW_AT_call_origin ([[foo_sp]]) |
| ; OBJ: DW_AT_call_return_pc |
| ; OBJ: DW_TAG_call_site |
| ; OBJ: DW_AT_call_target |
| ; OBJ: DW_AT_call_return_pc |
| define i32 @main() !dbg !29 { |
| entry: |
| call void @_Z3foov(), !dbg !32 |
| |
| %indirect_target = load ptr, ptr undef |
| call void %indirect_target() |
| |
| call void asm sideeffect "", "~{dirflag},~{fpsr},~{flags}"() |
| |
| ret i32 0, !dbg !33 |
| } |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!8, !9, !10, !11} |
| !llvm.ident = !{!12} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = distinct !DIGlobalVariable(name: "sink", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true) |
| !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 7.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) |
| !3 = !DIFile(filename: "/Users/vsk/src/llvm.org-tailcall/tail2.cc", directory: "/Users/vsk/src/builds/llvm-project-tailcall-RA", checksumkind: CSK_MD5, checksum: "3b61952c21b7f657ddb7c0ad44cf5529") |
| !4 = !{} |
| !5 = !{!0} |
| !6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7) |
| !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !8 = !{i32 2, !"Dwarf Version", i32 5} |
| !9 = !{i32 2, !"Debug Info Version", i32 3} |
| !10 = !{i32 1, !"wchar_size", i32 4} |
| !11 = !{i32 7, !"PIC Level", i32 2} |
| !12 = !{!"clang version 7.0.0 "} |
| !13 = distinct !DISubprogram(name: "bat", linkageName: "_Z3batv", scope: !3, file: !3, line: 2, type: !14, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, isOptimized: true, unit: !2, retainedNodes: !4) |
| !14 = !DISubroutineType(types: !15) |
| !15 = !{null} |
| !16 = !DILocation(line: 2, column: 44, scope: !13) |
| !17 = !{!18, !18, i64 0} |
| !18 = !{!"int", !19, i64 0} |
| !19 = !{!"omnipotent char", !20, i64 0} |
| !20 = !{!"Simple C++ TBAA"} |
| !21 = !DILocation(line: 2, column: 48, scope: !13) |
| !22 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barv", scope: !3, file: !3, line: 3, type: !14, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, isOptimized: true, unit: !2, retainedNodes: !4) |
| !23 = !DILocation(line: 3, column: 44, scope: !22) |
| !24 = !DILocation(line: 3, column: 48, scope: !22) |
| !25 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !3, file: !3, line: 4, type: !14, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, isOptimized: true, unit: !2, retainedNodes: !4) |
| !26 = !DILocation(line: 5, column: 3, scope: !25) |
| !27 = !DILocation(line: 6, column: 3, scope: !25) |
| !28 = !DILocation(line: 7, column: 1, scope: !25) |
| !29 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 8, type: !30, isLocal: false, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, isOptimized: true, unit: !2, retainedNodes: !4) |
| !30 = !DISubroutineType(types: !31) |
| !31 = !{!7} |
| !32 = !DILocation(line: 8, column: 50, scope: !29) |
| !33 = !DILocation(line: 8, column: 57, scope: !29) |