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llvm-project/llvm/test/DebugInfo/X86/dwarf-linkage-names.ll

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Make DW_AT_[MIPS_]linkage_name optional, and off by default for SCE. Mangled "linkage" names can be huge, and if the debugger (or other tools) have no use for them, the size savings can be very impressive (on the order of 40%). Add one test for controlling behavior, and modify a number of tests to either stop using linkage names, or make llc emit them (so these tests will still run when the default triple is for PS4). Differential Revision: http://reviews.llvm.org/D11374 llvm-svn: 244678
2015-08-12 05:36:45 +08:00
; DWARF linkage name attributes are optional; verify they are missing for
; PS4 triple or when tuning for SCE.
; RUN: llc -O0 -mtriple=x86_64-unknown-unknown < %s | FileCheck %s -check-prefix LINKAGE1
; RUN: llc -O0 -mtriple=x86_64-unknown-unknown < %s | FileCheck %s -check-prefix LINKAGE2
; RUN: llc -O0 -mtriple=x86_64-scei-ps4 < %s | FileCheck %s -check-prefix NOLINKAGE
; RUN: llc -O0 -mtriple=x86_64-unknown-unknown -debugger-tune=sce < %s | FileCheck %s -check-prefix NOLINKAGE
; $ clang++ -emit-llvm -S -g dwarf-linkage-names.cpp
; namespace test {
; int global_var;
; int bar() { return global_var; }
;};
; With linkage names, we get an attribute for the declaration (first) entry
; for the global variable, and one for the function.
; This assumes the variable will appear before the function.
; LINKAGE1: .section .debug_info
; LINKAGE1: DW_TAG_variable
; LINKAGE1-NOT: DW_TAG
Minor tidying of regex in a test llvm-svn: 245486
2015-08-20 03:36:35 +08:00
; LINKAGE1: {{DW_AT_(MIPS_)?linkage_name}}
Make DW_AT_[MIPS_]linkage_name optional, and off by default for SCE. Mangled "linkage" names can be huge, and if the debugger (or other tools) have no use for them, the size savings can be very impressive (on the order of 40%). Add one test for controlling behavior, and modify a number of tests to either stop using linkage names, or make llc emit them (so these tests will still run when the default triple is for PS4). Differential Revision: http://reviews.llvm.org/D11374 llvm-svn: 244678
2015-08-12 05:36:45 +08:00
; LINKAGE1: DW_TAG_subprogram
; LINKAGE1-NOT: DW_TAG
Minor tidying of regex in a test llvm-svn: 245486
2015-08-20 03:36:35 +08:00
; LINKAGE1: {{DW_AT_(MIPS_)?linkage_name}}
Make DW_AT_[MIPS_]linkage_name optional, and off by default for SCE. Mangled "linkage" names can be huge, and if the debugger (or other tools) have no use for them, the size savings can be very impressive (on the order of 40%). Add one test for controlling behavior, and modify a number of tests to either stop using linkage names, or make llc emit them (so these tests will still run when the default triple is for PS4). Differential Revision: http://reviews.llvm.org/D11374 llvm-svn: 244678
2015-08-12 05:36:45 +08:00
; LINKAGE1: .section
; Also verify we see the mangled names. We do this as a separate pass to
; avoid depending on the order of .debug_info and .debug_str sections.
; LINKAGE2-DAG: .asciz "_ZN4test10global_varE"
; LINKAGE2-DAG: .asciz "_ZN4test3barEv"
; Without linkage names, verify there aren't any linkage-name attributes,
; and no mangled names.
Minor tidying of regex in a test llvm-svn: 245486
2015-08-20 03:36:35 +08:00
; NOLINKAGE-NOT: {{DW_AT_(MIPS_)?linkage_name}}
Make DW_AT_[MIPS_]linkage_name optional, and off by default for SCE. Mangled "linkage" names can be huge, and if the debugger (or other tools) have no use for them, the size savings can be very impressive (on the order of 40%). Add one test for controlling behavior, and modify a number of tests to either stop using linkage names, or make llc emit them (so these tests will still run when the default triple is for PS4). Differential Revision: http://reviews.llvm.org/D11374 llvm-svn: 244678
2015-08-12 05:36:45 +08:00
; NOLINKAGE-NOT: .asciz "_ZN4test10global_varE"
; NOLINKAGE-NOT: .asciz "_ZN4test3barEv"
@_ZN4test10global_varE = global i32 0, align 4
; Function Attrs: nounwind uwtable
define i32 @_ZN4test3barEv() #0 {
entry:
%0 = load i32, i32* @_ZN4test10global_varE, align 4, !dbg !14
ret i32 %0, !dbg !15
}
attributes #0 = { nounwind uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!11, !12}
!llvm.ident = !{!13}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 244662)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3, globals: !9)
!1 = !DIFile(filename: "dwarf-linkage-names.cpp", directory: "/home/probinson/projects/scratch")
!2 = !{}
!3 = !{!4}
DI: Require subprogram definitions to be distinct As a follow-up to r246098, require `DISubprogram` definitions (`isDefinition: true`) to be 'distinct'. Specifically, add an assembler check, a verifier check, and bitcode upgrading logic to combat testcase bitrot after the `DIBuilder` change. While working on the testcases, I realized that test/Linker/subprogram-linkonce-weak-odr.ll isn't relevant anymore. Its purpose was to check for a corner case in PR22792 where two subprogram definitions match exactly and share the same metadata node. The new verifier check, requiring that subprogram definitions are 'distinct', precludes that possibility. I updated almost all the IR with the following script: git grep -l -E -e '= !DISubprogram\(.* isDefinition: true' | grep -v test/Bitcode | xargs sed -i '' -e 's/= \(!DISubprogram(.*, isDefinition: true\)/= distinct \1/' Likely some variant of would work for out-of-tree testcases. llvm-svn: 246327
2015-08-29 04:26:49 +08:00
!4 = distinct !DISubprogram(name: "bar", linkageName: "_ZN4test3barEv", scope: !5, file: !1, line: 3, type: !6, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, function: i32 ()* @_ZN4test3barEv, variables: !2)
Make DW_AT_[MIPS_]linkage_name optional, and off by default for SCE. Mangled "linkage" names can be huge, and if the debugger (or other tools) have no use for them, the size savings can be very impressive (on the order of 40%). Add one test for controlling behavior, and modify a number of tests to either stop using linkage names, or make llc emit them (so these tests will still run when the default triple is for PS4). Differential Revision: http://reviews.llvm.org/D11374 llvm-svn: 244678
2015-08-12 05:36:45 +08:00
!5 = !DINamespace(name: "test", scope: null, file: !1, line: 1)
!6 = !DISubroutineType(types: !7)
!7 = !{!8}
!8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!9 = !{!10}
!10 = !DIGlobalVariable(name: "global_var", linkageName: "_ZN4test10global_varE", scope: !5, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, variable: i32* @_ZN4test10global_varE)
!11 = !{i32 2, !"Dwarf Version", i32 4}
!12 = !{i32 2, !"Debug Info Version", i32 3}
!13 = !{!"clang version 3.8.0 (trunk 244662)"}
!14 = !DILocation(line: 3, column: 21, scope: !4)
!15 = !DILocation(line: 3, column: 14, scope: !4)