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a5b2af0eae
Summary: Most DIExpressions are empty or very simple. When they are complex, they tend to be unique, so checking them inline is reasonable. This also avoids the need for CodeGen passes to append to the llvm.dbg.mir named md node. See also PR22780, for making DIExpression not be an MDNode. Reviewers: aprantl, dexonsmith, dblaikie Subscribers: qcolombet, javed.absar, eraman, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D37075 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311594 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
4.8 KiB
LLVM
84 lines
4.8 KiB
LLVM
; Checks that llvm.dbg.declare -> llvm.dbg.value conversion utility
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; (here exposed through the SROA) pass, properly inserts bit_piece expressions
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; if it only describes part of the variable.
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; RUN: opt -S -sroa %s | FileCheck %s
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; Built from:
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; struct foo { bool b; long i; };
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; void f(bool b, bool expr, foo g) {
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; }
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; And modifying the frag dbg.declare to use a fragmented DIExpression (with offset: 0, size: 4)
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; to test the dbg.declare+fragment case here.
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; Expect two fragments:
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; * first starting at bit 0, 8 bits (for the bool)
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; * second starting at bit 32, 32 bits (for the long)
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; (this happens to create/demonstrate a gap from bits [7, 32))
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; But also check that a complex expression is not used for a lone bool
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; parameter. It can reference the register it's in directly without masking off
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; high bits or anything
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; CHECK: call void @llvm.dbg.value(metadata i8 %g.coerce0, metadata ![[VAR_STRUCT:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 8))
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; CHECK: call void @llvm.dbg.value(metadata i64 %g.coerce1, metadata ![[VAR_STRUCT]], metadata !DIExpression(DW_OP_LLVM_fragment, 32, 64))
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; CHECK: call void @llvm.dbg.value(metadata i1 %b, metadata ![[VAR_BOOL:[0-9]+]], metadata !DIExpression())
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; CHECK: call void @llvm.dbg.value(metadata i1 %frag, metadata ![[VAR_FRAG:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 1))
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%struct.foo = type { i8, i64 }
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; Function Attrs: noinline nounwind uwtable
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define void @_Z1fbb3foo(i1 zeroext %b, i1 zeroext %frag, i8 %g.coerce0, i64 %g.coerce1) #0 !dbg !6 {
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entry:
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%g = alloca %struct.foo, align 8
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%b.addr = alloca i8, align 1
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%frag.addr = alloca i8, align 1
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%0 = bitcast %struct.foo* %g to { i8, i64 }*
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%1 = getelementptr inbounds { i8, i64 }, { i8, i64 }* %0, i32 0, i32 0
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store i8 %g.coerce0, i8* %1, align 8
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%2 = getelementptr inbounds { i8, i64 }, { i8, i64 }* %0, i32 0, i32 1
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store i64 %g.coerce1, i64* %2, align 8
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%frombool = zext i1 %b to i8
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store i8 %frombool, i8* %b.addr, align 1
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call void @llvm.dbg.declare(metadata i8* %b.addr, metadata !15, metadata !16), !dbg !17
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%frombool1 = zext i1 %frag to i8
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store i8 %frombool1, i8* %frag.addr, align 1
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call void @llvm.dbg.declare(metadata i8* %frag.addr, metadata !18, metadata !23), !dbg !19
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call void @llvm.dbg.declare(metadata %struct.foo* %g, metadata !20, metadata !16), !dbg !21
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ret void, !dbg !22
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}
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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attributes #0 = { noinline nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "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-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 5.0.0 (trunk 303077) (llvm/trunk 303098)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "foo.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{!"clang version 5.0.0 (trunk 303077) (llvm/trunk 303098)"}
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!6 = distinct !DISubprogram(name: "f", linkageName: "_Z1fbb3foo", scope: !1, file: !1, line: 2, type: !7, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2)
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!7 = !DISubroutineType(types: !8)
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!8 = !{null, !9, !9, !10}
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!9 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)
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!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "foo", file: !1, line: 1, size: 128, elements: !11, identifier: "_ZTS3foo")
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!11 = !{!12, !13}
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!12 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !10, file: !1, line: 1, baseType: !9, size: 8)
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!13 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !10, file: !1, line: 1, baseType: !14, size: 64, offset: 64)
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!14 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
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!15 = !DILocalVariable(name: "b", arg: 1, scope: !6, file: !1, line: 2, type: !9)
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!16 = !DIExpression()
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!17 = !DILocation(line: 2, column: 13, scope: !6)
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!18 = !DILocalVariable(name: "frag", arg: 2, scope: !6, file: !1, line: 2, type: !9)
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!19 = !DILocation(line: 2, column: 21, scope: !6)
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!20 = !DILocalVariable(name: "g", arg: 3, scope: !6, file: !1, line: 2, type: !10)
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!21 = !DILocation(line: 2, column: 31, scope: !6)
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!22 = !DILocation(line: 3, column: 1, scope: !6)
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!23 = !DIExpression(DW_OP_LLVM_fragment, 0, 4)
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