diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp | 17 | ||||
| -rw-r--r-- | llvm/test/DebugInfo/ARM/split-complex.ll | 57 |
2 files changed, 71 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp index 5febd9fb380..56856c7ee3f 100644 --- a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp +++ b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp @@ -504,9 +504,20 @@ DIE *DwarfCompileUnit::constructVariableDIEImpl(const DbgVariable &DV, addVariableAddress(DV, *VariableDie, Location); } else if (RegOp.getReg()) addVariableAddress(DV, *VariableDie, MachineLocation(RegOp.getReg())); - } else if (DVInsn->getOperand(0).isImm()) - addConstantValue(*VariableDie, DVInsn->getOperand(0), DV.getType()); - else if (DVInsn->getOperand(0).isFPImm()) + } else if (DVInsn->getOperand(0).isImm()) { + // This variable is described by a single constant. + // Check whether it has a DIExpression. + auto *Expr = DV.getSingleExpression(); + if (Expr && Expr->getNumElements()) { + DIELoc *Loc = new (DIEValueAllocator) DIELoc; + DIEDwarfExpression DwarfExpr(*Asm, *this, *Loc); + // If there is an expression, emit raw unsigned bytes. + DwarfExpr.AddUnsignedConstant(DVInsn->getOperand(0).getImm()); + DwarfExpr.AddExpression(Expr->expr_op_begin(), Expr->expr_op_end()); + addBlock(*VariableDie, dwarf::DW_AT_location, Loc); + } else + addConstantValue(*VariableDie, DVInsn->getOperand(0), DV.getType()); + } else if (DVInsn->getOperand(0).isFPImm()) addConstantFPValue(*VariableDie, DVInsn->getOperand(0)); else if (DVInsn->getOperand(0).isCImm()) addConstantValue(*VariableDie, DVInsn->getOperand(0).getCImm(), diff --git a/llvm/test/DebugInfo/ARM/split-complex.ll b/llvm/test/DebugInfo/ARM/split-complex.ll new file mode 100644 index 00000000000..a80a998cd2d --- /dev/null +++ b/llvm/test/DebugInfo/ARM/split-complex.ll @@ -0,0 +1,57 @@ +; RUN: %llc_dwarf -O0 -filetype=obj -o %t.o %s +; RUN: llvm-dwarfdump -debug-dump=info %t.o | FileCheck %s +; REQUIRES: object-emission +target datalayout = "e-m:o-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64" +target triple = "thumbv7-apple-unknown-macho" + +; generated from (-triple thumbv7-apple-unknown-macho -Os): +; void f(_Complex double c) { c = 0; } + +; Function Attrs: nounwind readnone +define arm_aapcscc void @f([2 x i64] %c.coerce) #0 !dbg !4 { +entry: + tail call void @llvm.dbg.declare(metadata { double, double }* undef, metadata !14, metadata !15), !dbg !16 + ; The target has no native double type. + ; SROA split the complex value into two i64 values. + ; CHECK: DW_TAG_formal_parameter + ; CHECK-NEXT: DW_AT_location [DW_FORM_block1] (<0x04> 10 00 93 08 ) + ; DW_AT_location ( constu 0x00000000, piece 0x00000008 ) + ; CHECK-NEXT: DW_AT_name {{.*}} "c" + tail call void @llvm.dbg.value(metadata i64 0, i64 0, metadata !14, metadata !17), !dbg !16 + ; Manually removed to disable location list emission: + ; tail call void @llvm.dbg.value(metadata i64 0, i64 0, metadata !14, metadata !18), !dbg !16 + ret void, !dbg !19 +} + +; Function Attrs: nounwind readnone +declare void @llvm.dbg.declare(metadata, metadata, metadata) #0 + +; Function Attrs: nounwind readnone +declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #0 + +attributes #0 = { nounwind readnone } + +!llvm.dbg.cu = !{!0} +!llvm.module.flags = !{!9, !10, !11, !12} +!llvm.ident = !{!13} + +!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (trunk 259998) (llvm/trunk 259999)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3) +!1 = !DIFile(filename: "<stdin>", directory: "/") +!2 = !{} +!3 = !{!4} +!4 = distinct !DISubprogram(name: "f", scope: !5, file: !5, line: 1, type: !6, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, variables: !2) +!5 = !DIFile(filename: "test.c", directory: "/") +!6 = !DISubroutineType(types: !7) +!7 = !{null, !8} +!8 = !DIBasicType(name: "complex", size: 128, align: 64, encoding: DW_ATE_complex_float) +!9 = !{i32 2, !"Dwarf Version", i32 2} +!10 = !{i32 2, !"Debug Info Version", i32 3} +!11 = !{i32 1, !"wchar_size", i32 4} +!12 = !{i32 1, !"min_enum_size", i32 4} +!13 = !{!"clang version 3.9.0 (trunk 259998) (llvm/trunk 259999)"} +!14 = !DILocalVariable(name: "c", arg: 1, scope: !4, file: !5, line: 1, type: !8) +!15 = !DIExpression() +!16 = !DILocation(line: 1, column: 24, scope: !4) +!17 = !DIExpression(DW_OP_bit_piece, 0, 64) +!18 = !DIExpression(DW_OP_bit_piece, 64, 64) +!19 = !DILocation(line: 1, column: 36, scope: !4) |
