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[SelectionDAG] Dump debug locs in SDNodes 

This helps debug issues where selection-dag assigns the wrong location
to an instruction.

Differential Revision: https://reviews.llvm.org/D45913

llvm-svn: 330618
This commit is contained in:
Vedant Kumar 2018-04-23 17:18:24 +00:00
parent e8643a0c91
commit f17720633b
2 changed files with 62 additions and 0 deletions
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4
llvm/lib/CodeGen/SelectionDAG/SelectionDAGDumper.cpp
View File

@ -834,4 +834,8 @@ void SDNode::print(raw_ostream &OS, const SelectionDAG *G) const {
if (i) OS << ", "; else OS << " ";
printOperand(OS, G, getOperand(i));
}
if (DebugLoc DL = getDebugLoc()) {
OS << ", ";
DL.print(OS);
}
}

58
llvm/test/CodeGen/X86/selectiondag-debug-loc.ll Normal file
View File

@ -0,0 +1,58 @@
; REQUIRES: asserts
; RUN: llc < %s -O1 -mtriple=x86_64-unknown-unknown -o /dev/null -debug-only=selectiondag 2>&1 | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.13.0"
define i32 @main(i32 %argc, i8** %argv) !dbg !8 {
entry:
%retval = alloca i32, align 4
%argc.addr = alloca i32, align 4
%argv.addr = alloca i8**, align 8
store i32 0, i32* %retval, align 4
store i32 %argc, i32* %argc.addr, align 4
call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !16, metadata !DIExpression()), !dbg !17
store i8** %argv, i8*** %argv.addr, align 8
call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !18, metadata !DIExpression()), !dbg !19
%0 = load i8**, i8*** %argv.addr, align 8, !dbg !20
%1 = load i32, i32* %argc.addr, align 4, !dbg !21
%idxprom = sext i32 %1 to i64, !dbg !20
%arrayidx = getelementptr inbounds i8*, i8** %0, i64 %idxprom, !dbg !20
%2 = load i8*, i8** %arrayidx, align 8, !dbg !20
%arrayidx1 = getelementptr inbounds i8, i8* %2, i64 0, !dbg !20
%3 = load i8, i8* %arrayidx1, align 1, !dbg !20
%conv = sext i8 %3 to i32, !dbg !20
; CHECK: X86ISD::RET_FLAG {{.*}}, TargetConstant:i32<0>, Register:i32 $eax, {{.*}}, <stdin>:2:3
ret i32 %conv, !dbg !22
}
declare void @llvm.dbg.declare(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!llvm.ident = !{!7}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 (trunk 330296) (llvm/trunk 330298)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
!1 = !DIFile(filename: "-", directory: "/Users/vsk/src/builds/llvm.org-master-RA")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{i32 7, !"PIC Level", i32 2}
!7 = !{!"clang version 7.0.0 (trunk 330296) (llvm/trunk 330298)"}
!8 = distinct !DISubprogram(name: "main", scope: !9, file: !9, line: 1, type: !10, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, variables: !2)
!9 = !DIFile(filename: "<stdin>", directory: "/Users/vsk/src/builds/llvm.org-master-RA")
!10 = !DISubroutineType(types: !11)
!11 = !{!12, !12, !13}
!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64)
!14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 64)
!15 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
!16 = !DILocalVariable(name: "argc", arg: 1, scope: !8, file: !9, line: 1, type: !12)
!17 = !DILocation(line: 1, column: 14, scope: !8)
!18 = !DILocalVariable(name: "argv", arg: 2, scope: !8, file: !9, line: 1, type: !13)
!19 = !DILocation(line: 1, column: 27, scope: !8)
!20 = !DILocation(line: 2, column: 10, scope: !8)
!21 = !DILocation(line: 2, column: 15, scope: !8)
!22 = !DILocation(line: 2, column: 3, scope: !8)