1; Checks that llvm.dbg.declare -> llvm.dbg.value conversion utility 2; (here exposed through the SROA) pass, properly inserts bit_piece expressions 3; if it only describes part of the variable. 4; RUN: opt -S -sroa %s | FileCheck %s 5 6; Built from: 7; struct foo { bool b; long i; }; 8; void f(bool b, bool expr, foo g) { 9; } 10; And modifying the frag dbg.declare to use a fragmented DIExpression (with offset: 0, size: 4) 11; to test the dbg.declare+fragment case here. 12 13; Expect two fragments: 14; * first starting at bit 0, 8 bits (for the bool) 15; * second starting at bit 32, 32 bits (for the long) 16; (this happens to create/demonstrate a gap from bits [7, 32)) 17 18; But also check that a complex expression is not used for a lone bool 19; parameter. It can reference the register it's in directly without masking off 20; high bits or anything 21 22; CHECK: call void @llvm.dbg.value(metadata i8 %g.coerce0, metadata ![[VAR_STRUCT:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 8)) 23; CHECK: call void @llvm.dbg.value(metadata i64 %g.coerce1, metadata ![[VAR_STRUCT]], metadata !DIExpression(DW_OP_LLVM_fragment, 32, 64)) 24; CHECK: call void @llvm.dbg.value(metadata i1 %b, metadata ![[VAR_BOOL:[0-9]+]], metadata !DIExpression()) 25; CHECK: call void @llvm.dbg.value(metadata i1 %frag, metadata ![[VAR_FRAG:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 1)) 26 27%struct.foo = type { i8, i64 } 28 29; Function Attrs: noinline nounwind uwtable 30define void @_Z1fbb3foo(i1 zeroext %b, i1 zeroext %frag, i8 %g.coerce0, i64 %g.coerce1) #0 !dbg !6 { 31entry: 32 %g = alloca %struct.foo, align 8 33 %b.addr = alloca i8, align 1 34 %frag.addr = alloca i8, align 1 35 %0 = bitcast %struct.foo* %g to { i8, i64 }* 36 %1 = getelementptr inbounds { i8, i64 }, { i8, i64 }* %0, i32 0, i32 0 37 store i8 %g.coerce0, i8* %1, align 8 38 %2 = getelementptr inbounds { i8, i64 }, { i8, i64 }* %0, i32 0, i32 1 39 store i64 %g.coerce1, i64* %2, align 8 40 %frombool = zext i1 %b to i8 41 store i8 %frombool, i8* %b.addr, align 1 42 call void @llvm.dbg.declare(metadata i8* %b.addr, metadata !15, metadata !16), !dbg !17 43 %frombool1 = zext i1 %frag to i8 44 store i8 %frombool1, i8* %frag.addr, align 1 45 call void @llvm.dbg.declare(metadata i8* %frag.addr, metadata !18, metadata !23), !dbg !19 46 call void @llvm.dbg.declare(metadata %struct.foo* %g, metadata !20, metadata !16), !dbg !21 47 ret void, !dbg !22 48} 49 50; Function Attrs: nounwind readnone speculatable 51declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 52 53attributes #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" } 54attributes #1 = { nounwind readnone speculatable } 55 56!llvm.dbg.cu = !{!0} 57!llvm.module.flags = !{!3, !4} 58!llvm.ident = !{!5} 59 60!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) 61!1 = !DIFile(filename: "foo.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch") 62!2 = !{} 63!3 = !{i32 2, !"Dwarf Version", i32 4} 64!4 = !{i32 2, !"Debug Info Version", i32 3} 65!5 = !{!"clang version 5.0.0 (trunk 303077) (llvm/trunk 303098)"} 66!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, retainedNodes: !2) 67!7 = !DISubroutineType(types: !8) 68!8 = !{null, !9, !9, !10} 69!9 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean) 70!10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "foo", file: !1, line: 1, size: 128, elements: !11, identifier: "_ZTS3foo") 71!11 = !{!12, !13} 72!12 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !10, file: !1, line: 1, baseType: !9, size: 8) 73!13 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !10, file: !1, line: 1, baseType: !14, size: 64, offset: 64) 74!14 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed) 75!15 = !DILocalVariable(name: "b", arg: 1, scope: !6, file: !1, line: 2, type: !9) 76!16 = !DIExpression() 77!17 = !DILocation(line: 2, column: 13, scope: !6) 78!18 = !DILocalVariable(name: "frag", arg: 2, scope: !6, file: !1, line: 2, type: !9) 79!19 = !DILocation(line: 2, column: 21, scope: !6) 80!20 = !DILocalVariable(name: "g", arg: 3, scope: !6, file: !1, line: 2, type: !10) 81!21 = !DILocation(line: 2, column: 31, scope: !6) 82!22 = !DILocation(line: 3, column: 1, scope: !6) 83!23 = !DIExpression(DW_OP_LLVM_fragment, 0, 4) 84