1## Test the call site encoding in DWARF5 vs GNU extensions. 2 3## === DWARF4, tune for gdb === 4# RUN: llc -emit-call-site-info -dwarf-version 4 -debugger-tune=gdb -filetype=obj \ 5# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \ 6# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-GNU -implicit-check-not=DW_AT_call 7 8# === DWARF5, tune for gdb === 9# RUN: llc -dwarf-version 5 -debugger-tune=gdb -emit-call-site-info -filetype=obj \ 10# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \ 11# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call 12 13## === DWARF4, tune for lldb === 14# RUN: llc -dwarf-version 4 -debugger-tune=lldb -emit-call-site-info -filetype=obj \ 15# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \ 16# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call 17 18## === DWARF5, tune for lldb === 19# RUN: llc -dwarf-version 5 -debugger-tune=lldb -emit-call-site-info -filetype=obj \ 20# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \ 21# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call 22 23## === DWARF4, tune for sce === 24# RUN: llc -emit-call-site-info -dwarf-version 4 -filetype=obj -debugger-tune=sce \ 25# RUN: -debug-entry-values -mtriple=x86_64-unknown-unknown \ 26# RUN: -start-after=machineverifier -o - %s | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-GNU 27 28## === DWARF5, tune for sce === 29# RUN: llc -emit-call-site-info -dwarf-version 5 -filetype=obj -debugger-tune=sce \ 30# RUN: -debug-entry-values -mtriple=x86_64-unknown-unknown \ 31# RUN: -start-after=machineverifier -o - %s | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 32 33## This is based on the following reproducer: 34## 35## extern void fn(); 36## extern void fn2(int x); 37## extern int fn3(); 38## 39## int fn1(int (*fn4) ()) { 40## fn(); 41## fn2(5); 42## 43## int x = (*fn4)(); 44## if (!x) 45## return fn3(); 46## else 47## return -1; 48## } 49 50## Check GNU extensions: 51 52# CHECK-GNU: DW_TAG_subprogram 53# CHECK-GNU: DW_AT_GNU_all_call_sites (true) 54# CHECK-GNU: DW_TAG_GNU_call_site 55# CHECK-GNU-NEXT: DW_AT_abstract_origin 56# CHECK-GNU-NEXT: DW_AT_low_pc 57# CHECK-GNU: DW_TAG_GNU_call_site_parameter 58# CHECK-GNU-NEXT: DW_AT_location 59# CHECK-GNU-NEXT: DW_AT_GNU_call_site_value 60# CHECK-GNU: DW_TAG_GNU_call_site 61# CHECK-GNU-NEXT: DW_AT_GNU_call_site_target 62# CHECK-GNU-NEXT: DW_AT_low_pc 63# CHECK-GNU: DW_TAG_GNU_call_site 64# CHECK-GNU-NEXT: DW_AT_abstract_origin 65# CHECK-GNU-NEXT: DW_AT_GNU_tail_call 66# CHECK-GNU-NEXT: DW_AT_low_pc 67 68## Check DWARF 5: 69 70# CHECK-DWARF5: DW_TAG_subprogram 71# CHECK-DWARF5: DW_AT_call_all_calls (true) 72# CHECK-DWARF5: DW_TAG_call_site 73# CHECK-DWARF5-NEXT: DW_AT_call_origin 74# CHECK-DWARF5-NEXT: DW_AT_call_return_pc 75# CHECK-DWARF5: DW_TAG_call_site 76# CHECK-DWARF5-NEXT: DW_AT_call_origin 77# CHECK-DWARF5-NEXT: DW_AT_call_return_pc 78# CHECK-DWARF5: DW_TAG_call_site_parameter 79# CHECK-DWARF5-NEXT: DW_AT_location 80# CHECK-DWARF5-NEXT: DW_AT_call_value 81# CHECK-DWARF5: DW_TAG_call_site 82# CHECK-DWARF5-NEXT: DW_AT_call_target 83# CHECK-DWARF5-NEXT: DW_AT_call_return_pc 84# CHECK-DWARF5: DW_TAG_call_site 85# CHECK-DWARF5-NEXT: DW_AT_call_origin 86# CHECK-DWARF5-NEXT: DW_AT_call_tail_call 87# CHECK-DWARF5-NEXT: DW_AT_call_pc 88 89--- | 90 ; ModuleID = 'call-site-attrs.c' 91 source_filename = "call-site-attrs.c" 92 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 93 target triple = "x86_64-unknown-linux-gnu" 94 ; Function Attrs: nounwind uwtable 95 define dso_local i32 @fn1(i32 (...)* nocapture %fn4) local_unnamed_addr !dbg !18 { 96 entry: 97 call void @llvm.dbg.value(metadata i32 (...)* %fn4, metadata !23, metadata !DIExpression()), !dbg !25 98 tail call void (...) @fn(), !dbg !26 99 tail call void @fn2(i32 5), !dbg !27 100 %call = tail call i32 (...) %fn4(), !dbg !28 101 call void @llvm.dbg.value(metadata i32 %call, metadata !24, metadata !DIExpression()), !dbg !25 102 %tobool = icmp eq i32 %call, 0, !dbg !29 103 br i1 %tobool, label %if.then, label %cleanup, !dbg !31 104 105 if.then: ; preds = %entry 106 %call1 = tail call i32 (...) @fn3(), !dbg !32 107 ret i32 %call1, !dbg !33 108 109 cleanup: ; preds = %entry 110 ret i32 -1, !dbg !33 111 } 112 declare !dbg !4 dso_local void @fn(...) local_unnamed_addr 113 declare !dbg !7 dso_local void @fn2(i32) local_unnamed_addr 114 declare !dbg !11 dso_local i32 @fn3(...) local_unnamed_addr 115 ; Function Attrs: nounwind readnone speculatable willreturn 116 declare void @llvm.dbg.value(metadata, metadata, metadata) 117 118 !llvm.dbg.cu = !{!0} 119 !llvm.module.flags = !{!14, !15, !16} 120 !llvm.ident = !{!17} 121 122 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, splitDebugInlining: false, nameTableKind: None) 123 !1 = !DIFile(filename: "call-site-attrs.c", directory: "/") 124 !2 = !{} 125 !3 = !{!4, !7, !11} 126 !4 = !DISubprogram(name: "fn", scope: !1, file: !1, line: 1, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2) 127 !5 = !DISubroutineType(types: !6) 128 !6 = !{null, null} 129 !7 = !DISubprogram(name: "fn2", scope: !1, file: !1, line: 2, type: !8, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2) 130 !8 = !DISubroutineType(types: !9) 131 !9 = !{null, !10} 132 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 133 !11 = !DISubprogram(name: "fn3", scope: !1, file: !1, line: 3, type: !12, spFlags: DISPFlagOptimized, retainedNodes: !2) 134 !12 = !DISubroutineType(types: !13) 135 !13 = !{!10, null} 136 !14 = !{i32 7, !"Dwarf Version", i32 4} 137 !15 = !{i32 2, !"Debug Info Version", i32 3} 138 !16 = !{i32 1, !"wchar_size", i32 4} 139 !17 = !{!"clang version 11.0.0"} 140 !18 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 5, type: !19, scopeLine: 5, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !22) 141 !19 = !DISubroutineType(types: !20) 142 !20 = !{!10, !21} 143 !21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64) 144 !22 = !{!23, !24} 145 !23 = !DILocalVariable(name: "fn4", arg: 1, scope: !18, file: !1, line: 5, type: !21) 146 !24 = !DILocalVariable(name: "x", scope: !18, file: !1, line: 9, type: !10) 147 !25 = !DILocation(line: 0, scope: !18) 148 !26 = !DILocation(line: 6, column: 3, scope: !18) 149 !27 = !DILocation(line: 7, column: 3, scope: !18) 150 !28 = !DILocation(line: 9, column: 11, scope: !18) 151 !29 = !DILocation(line: 10, column: 8, scope: !30) 152 !30 = distinct !DILexicalBlock(scope: !18, file: !1, line: 10, column: 7) 153 !31 = !DILocation(line: 10, column: 7, scope: !18) 154 !32 = !DILocation(line: 11, column: 12, scope: !30) 155 !33 = !DILocation(line: 14, column: 1, scope: !18) 156 157... 158--- 159name: fn1 160callSites: 161 - { bb: 0, offset: 7, fwdArgRegs: [] } 162 - { bb: 0, offset: 9, fwdArgRegs: 163 - { arg: 0, reg: '$edi' } } 164 - { bb: 0, offset: 11, fwdArgRegs: [] } 165 - { bb: 2, offset: 7, fwdArgRegs: [] } 166body: | 167 bb.0.entry: 168 successors: %bb.2(0x30000000), %bb.1(0x50000000) 169 liveins: $rdi, $rbx 170 171 DBG_VALUE $rdi, $noreg, !23, !DIExpression(), debug-location !25 172 frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp 173 CFI_INSTRUCTION def_cfa_offset 16 174 CFI_INSTRUCTION offset $rbx, -16 175 $rbx = MOV64rr $rdi 176 DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25 177 dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !26 178 CALL64pcrel32 @fn, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, debug-location !26 179 $edi = MOV32ri 5, debug-location !27 180 CALL64pcrel32 @fn2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, debug-location !27 181 dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !28 182 CALL64r killed renamable $rbx, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !28 183 DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25 184 TEST32rr killed renamable $eax, renamable $eax, implicit-def $eflags, debug-location !29 185 JCC_1 %bb.2, 4, implicit $eflags, debug-location !31 186 187 bb.1.cleanup: 188 DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25 189 DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25 190 $eax = MOV32ri -1, debug-location !33 191 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33 192 DBG_VALUE $rdi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !25 193 CFI_INSTRUCTION def_cfa_offset 8, debug-location !33 194 RETQ $eax, debug-location !33 195 196 bb.2.if.then: 197 CFI_INSTRUCTION def_cfa_offset 16, debug-location !32 198 DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25 199 DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25 200 dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !32 201 $rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !32 202 DBG_VALUE $rdi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !25 203 CFI_INSTRUCTION def_cfa_offset 8, debug-location !32 204 TAILJMPd64 @fn3, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit $al, debug-location !32 205 206... 207