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https://github.com/c64scene-ar/llvm-6502.git
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88e419d66e
Remove 'inlinedAt:' from MDLocalVariable. Besides saving some memory (variables with it seem to be single largest `Metadata` contributer to memory usage right now in -g -flto builds), this stops optimization and backend passes from having to change local variables. The 'inlinedAt:' field was used by the backend in two ways: 1. To tell the backend whether and into what a variable was inlined. 2. To create a unique id for each inlined variable. Instead, rely on the 'inlinedAt:' field of the intrinsic's `!dbg` attachment, and change the DWARF backend to use a typedef called `InlinedVariable` which is `std::pair<MDLocalVariable*, MDLocation*>`. This `DebugLoc` is already passed reliably through the backend (as verified by r234021). This commit removes the check from r234021, but I added a new check (that will survive) in r235048, and changed the `DIBuilder` API in r235041 to require a `!dbg` attachment whose 'scope:` is in the same `MDSubprogram` as the variable's. If this breaks your out-of-tree testcases, perhaps the script I used (mdlocalvariable-drop-inlinedat.sh) will help; I'll attach it to PR22778 in a moment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235050 91177308-0d34-0410-b5e6-96231b3b80d8
80 lines
3.6 KiB
LLVM
80 lines
3.6 KiB
LLVM
; REQUIRES: object-emission
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; RUN: %llc_dwarf -filetype=obj < %s > %t
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; RUN: llvm-dwarfdump %t | FileCheck %s
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; IR generated from clang -O -g with the following source
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;
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; void f1(int x, int y);
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; void f3(int line);
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; void f2() {
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; f1(1, 2);
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; }
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; void f1(int x, int y) {
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; f3(y);
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; }
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; CHECK: DW_AT_name{{.*}}"f1"
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name{{.*}}"x"
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NOT: DW_TAG
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; CHECK: DW_AT_name{{.*}}"y"
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; Function Attrs: uwtable
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define void @_Z2f2v() #0 {
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tail call void @llvm.dbg.value(metadata i32 undef, i64 0, metadata !16, metadata !MDExpression()), !dbg !18
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tail call void @llvm.dbg.value(metadata i32 2, i64 0, metadata !20, metadata !MDExpression()), !dbg !18
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tail call void @_Z2f3i(i32 2), !dbg !21
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ret void, !dbg !22
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}
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; Function Attrs: uwtable
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define void @_Z2f1ii(i32 %x, i32 %y) #0 {
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tail call void @llvm.dbg.value(metadata i32 %x, i64 0, metadata !13, metadata !MDExpression()), !dbg !23
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tail call void @llvm.dbg.value(metadata i32 %y, i64 0, metadata !14, metadata !MDExpression()), !dbg !23
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tail call void @_Z2f3i(i32 %y), !dbg !24
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ret void, !dbg !25
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}
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declare void @_Z2f3i(i32) #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
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attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #2 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!26}
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!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.4 ", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2)
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!1 = !MDFile(filename: "exp.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
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!2 = !{}
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!3 = !{!4, !8}
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!4 = !MDSubprogram(name: "f2", linkageName: "_Z2f2v", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 3, file: !1, scope: !5, type: !6, function: void ()* @_Z2f2v, variables: !2)
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!5 = !MDFile(filename: "exp.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
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!6 = !MDSubroutineType(types: !7)
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!7 = !{null}
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!8 = !MDSubprogram(name: "f1", linkageName: "_Z2f1ii", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 6, file: !1, scope: !5, type: !9, function: void (i32, i32)* @_Z2f1ii, variables: !12)
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!9 = !MDSubroutineType(types: !10)
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!10 = !{null, !11, !11}
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!11 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!12 = !{!13, !14}
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!13 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "x", line: 6, arg: 1, scope: !8, file: !5, type: !11)
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!14 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "y", line: 6, arg: 2, scope: !8, file: !5, type: !11)
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!15 = !{i32 undef}
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!16 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "x", line: 6, arg: 1, scope: !8, file: !5, type: !11)
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!17 = !MDLocation(line: 4, scope: !4)
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!18 = !MDLocation(line: 6, scope: !8, inlinedAt: !17)
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!19 = !{i32 2}
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!20 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "y", line: 6, arg: 2, scope: !8, file: !5, type: !11)
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!21 = !MDLocation(line: 7, scope: !8, inlinedAt: !17)
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!22 = !MDLocation(line: 5, scope: !4)
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!23 = !MDLocation(line: 6, scope: !8)
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!24 = !MDLocation(line: 7, scope: !8)
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!25 = !MDLocation(line: 8, scope: !8)
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!26 = !{i32 1, !"Debug Info Version", i32 3}
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