207 lines
9.7 KiB
Plaintext
207 lines
9.7 KiB
Plaintext
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## Test the call site encoding in DWARF5 vs GNU extensions.
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## === DWARF4, tune for gdb ===
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# RUN: llc -emit-call-site-info -dwarf-version 4 -debugger-tune=gdb -filetype=obj \
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# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
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# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-GNU -implicit-check-not=DW_AT_call
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# === DWARF5, tune for gdb ===
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# RUN: llc -dwarf-version 5 -debugger-tune=gdb -emit-call-site-info -filetype=obj \
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# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
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# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call
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## === DWARF4, tune for lldb ===
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# RUN: llc -dwarf-version 4 -debugger-tune=lldb -emit-call-site-info -filetype=obj \
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# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
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# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call
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## === DWARF5, tune for lldb ===
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# RUN: llc -dwarf-version 5 -debugger-tune=lldb -emit-call-site-info -filetype=obj \
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# RUN: -mtriple=x86_64-unknown-unknown -start-after=machineverifier -o - %s \
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# RUN: | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5 -implicit-check-not=DW_AT_call
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## === DWARF4, tune for sce ===
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# RUN: llc -emit-call-site-info -dwarf-version 4 -filetype=obj -debugger-tune=sce \
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# RUN: -debug-entry-values -mtriple=x86_64-unknown-unknown \
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# RUN: -start-after=machineverifier -o - %s | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-GNU
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## === DWARF5, tune for sce ===
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# RUN: llc -emit-call-site-info -dwarf-version 5 -filetype=obj -debugger-tune=sce \
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# RUN: -debug-entry-values -mtriple=x86_64-unknown-unknown \
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# RUN: -start-after=machineverifier -o - %s | llvm-dwarfdump - | FileCheck %s -check-prefixes=CHECK-DWARF5
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## This is based on the following reproducer:
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##
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## extern void fn();
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## extern void fn2(int x);
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## extern int fn3();
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##
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## int fn1(int (*fn4) ()) {
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## fn();
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## fn2(5);
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##
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## int x = (*fn4)();
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## if (!x)
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## return fn3();
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## else
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## return -1;
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## }
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## Check GNU extensions:
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# CHECK-GNU: DW_TAG_subprogram
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# CHECK-GNU: DW_AT_GNU_all_call_sites (true)
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# CHECK-GNU: DW_TAG_GNU_call_site
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# CHECK-GNU-NEXT: DW_AT_abstract_origin
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# CHECK-GNU-NEXT: DW_AT_low_pc
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# CHECK-GNU: DW_TAG_GNU_call_site_parameter
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# CHECK-GNU-NEXT: DW_AT_location
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# CHECK-GNU-NEXT: DW_AT_GNU_call_site_value
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# CHECK-GNU: DW_TAG_GNU_call_site
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# CHECK-GNU-NEXT: DW_AT_GNU_call_site_target
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# CHECK-GNU-NEXT: DW_AT_low_pc
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# CHECK-GNU: DW_TAG_GNU_call_site
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# CHECK-GNU-NEXT: DW_AT_abstract_origin
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# CHECK-GNU-NEXT: DW_AT_GNU_tail_call
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# CHECK-GNU-NEXT: DW_AT_low_pc
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## Check DWARF 5:
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# CHECK-DWARF5: DW_TAG_subprogram
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# CHECK-DWARF5: DW_AT_call_all_calls (true)
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# CHECK-DWARF5: DW_TAG_call_site
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# CHECK-DWARF5-NEXT: DW_AT_call_origin
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# CHECK-DWARF5-NEXT: DW_AT_call_return_pc
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# CHECK-DWARF5: DW_TAG_call_site
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# CHECK-DWARF5-NEXT: DW_AT_call_origin
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# CHECK-DWARF5-NEXT: DW_AT_call_return_pc
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# CHECK-DWARF5: DW_TAG_call_site_parameter
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# CHECK-DWARF5-NEXT: DW_AT_location
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# CHECK-DWARF5-NEXT: DW_AT_call_value
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# CHECK-DWARF5: DW_TAG_call_site
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# CHECK-DWARF5-NEXT: DW_AT_call_target
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# CHECK-DWARF5-NEXT: DW_AT_call_return_pc
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# CHECK-DWARF5: DW_TAG_call_site
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# CHECK-DWARF5-NEXT: DW_AT_call_origin
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# CHECK-DWARF5-NEXT: DW_AT_call_tail_call
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# CHECK-DWARF5-NEXT: DW_AT_call_pc
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--- |
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; ModuleID = 'call-site-attrs.c'
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source_filename = "call-site-attrs.c"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: nounwind uwtable
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define dso_local i32 @fn1(i32 (...)* nocapture %fn4) local_unnamed_addr !dbg !18 {
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entry:
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call void @llvm.dbg.value(metadata i32 (...)* %fn4, metadata !23, metadata !DIExpression()), !dbg !25
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tail call void (...) @fn(), !dbg !26
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tail call void @fn2(i32 5), !dbg !27
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%call = tail call i32 (...) %fn4(), !dbg !28
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call void @llvm.dbg.value(metadata i32 %call, metadata !24, metadata !DIExpression()), !dbg !25
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%tobool = icmp eq i32 %call, 0, !dbg !29
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br i1 %tobool, label %if.then, label %cleanup, !dbg !31
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if.then: ; preds = %entry
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%call1 = tail call i32 (...) @fn3(), !dbg !32
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ret i32 %call1, !dbg !33
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cleanup: ; preds = %entry
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ret i32 -1, !dbg !33
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}
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declare !dbg !4 dso_local void @fn(...) local_unnamed_addr
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declare !dbg !7 dso_local void @fn2(i32) local_unnamed_addr
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declare !dbg !11 dso_local i32 @fn3(...) local_unnamed_addr
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!14, !15, !16}
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!llvm.ident = !{!17}
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!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)
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!1 = !DIFile(filename: "call-site-attrs.c", directory: "/")
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!2 = !{}
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!3 = !{!4, !7, !11}
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!4 = !DISubprogram(name: "fn", scope: !1, file: !1, line: 1, type: !5, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null, null}
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!7 = !DISubprogram(name: "fn2", scope: !1, file: !1, line: 2, type: !8, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !DISubprogram(name: "fn3", scope: !1, file: !1, line: 3, type: !12, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!12 = !DISubroutineType(types: !13)
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!13 = !{!10, null}
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!14 = !{i32 7, !"Dwarf Version", i32 4}
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!15 = !{i32 2, !"Debug Info Version", i32 3}
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!16 = !{i32 1, !"wchar_size", i32 4}
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!17 = !{!"clang version 11.0.0"}
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!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)
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!19 = !DISubroutineType(types: !20)
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!20 = !{!10, !21}
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!21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64)
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!22 = !{!23, !24}
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!23 = !DILocalVariable(name: "fn4", arg: 1, scope: !18, file: !1, line: 5, type: !21)
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!24 = !DILocalVariable(name: "x", scope: !18, file: !1, line: 9, type: !10)
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!25 = !DILocation(line: 0, scope: !18)
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!26 = !DILocation(line: 6, column: 3, scope: !18)
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!27 = !DILocation(line: 7, column: 3, scope: !18)
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!28 = !DILocation(line: 9, column: 11, scope: !18)
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!29 = !DILocation(line: 10, column: 8, scope: !30)
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!30 = distinct !DILexicalBlock(scope: !18, file: !1, line: 10, column: 7)
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!31 = !DILocation(line: 10, column: 7, scope: !18)
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!32 = !DILocation(line: 11, column: 12, scope: !30)
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!33 = !DILocation(line: 14, column: 1, scope: !18)
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...
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---
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name: fn1
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callSites:
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- { bb: 0, offset: 7, fwdArgRegs: [] }
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- { bb: 0, offset: 9, fwdArgRegs:
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- { arg: 0, reg: '$edi' } }
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- { bb: 0, offset: 11, fwdArgRegs: [] }
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- { bb: 2, offset: 7, fwdArgRegs: [] }
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body: |
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bb.0.entry:
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successors: %bb.2(0x30000000), %bb.1(0x50000000)
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liveins: $rdi, $rbx
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DBG_VALUE $rdi, $noreg, !23, !DIExpression(), debug-location !25
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frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
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CFI_INSTRUCTION def_cfa_offset 16
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CFI_INSTRUCTION offset $rbx, -16
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$rbx = MOV64rr $rdi
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DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
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dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !26
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CALL64pcrel32 @fn, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, debug-location !26
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$edi = MOV32ri 5, debug-location !27
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CALL64pcrel32 @fn2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, debug-location !27
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dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !28
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CALL64r killed renamable $rbx, csr_64, implicit $rsp, implicit $ssp, implicit $al, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !28
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DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
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TEST32rr killed renamable $eax, renamable $eax, implicit-def $eflags, debug-location !29
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JCC_1 %bb.2, 4, implicit $eflags, debug-location !31
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bb.1.cleanup:
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DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
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DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
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$eax = MOV32ri -1, debug-location !33
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$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !33
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DBG_VALUE $rdi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !25
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CFI_INSTRUCTION def_cfa_offset 8, debug-location !33
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RETQ $eax, debug-location !33
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bb.2.if.then:
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CFI_INSTRUCTION def_cfa_offset 16, debug-location !32
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DBG_VALUE $eax, $noreg, !24, !DIExpression(), debug-location !25
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DBG_VALUE $rbx, $noreg, !23, !DIExpression(), debug-location !25
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dead $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $al, debug-location !32
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$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !32
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DBG_VALUE $rdi, $noreg, !23, !DIExpression(DW_OP_LLVM_entry_value, 1), debug-location !25
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CFI_INSTRUCTION def_cfa_offset 8, debug-location !32
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TAILJMPd64 @fn3, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit $al, debug-location !32
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...
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