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6939b086bb
Extends DWARF expression language to express locals/globals locations. (via
target-index operands atm) (possible variants are: non-virtual registers
or address spaces)
The WebAssemblyExplicitLocals can replace virtual registers to targertindex
operand type at the time when WebAssembly backend introduces
{get,set,tee}_local instead of corresponding virtual registers.
Reviewed By: aprantl, dschuff
Tags: #debug-info, #llvm
Differential Revision: https://reviews.llvm.org/D52634
71 lines
3.2 KiB
LLVM
71 lines
3.2 KiB
LLVM
; RUN: llc < %s -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s
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; Verify if dwarfdump contains DBG_VALUE associated with locals.
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; See also dgb-value-ti.ll test.
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown-wasm"
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define hidden i32 @fib(i32 %n) local_unnamed_addr #0 !dbg !7 {
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entry:
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_TAG_variable
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call void @llvm.dbg.value(metadata i32 1, metadata !16, metadata !DIExpression()), !dbg !19
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%cmp8 = icmp sgt i32 %n, 0, !dbg !21
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br i1 %cmp8, label %for.body, label %for.end, !dbg !24
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for.body: ; preds = %entry, %for.body
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%b.011 = phi i32 [ %add, %for.body ], [ 1, %entry ]
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%a.010 = phi i32 [ %b.011, %for.body ], [ 0, %entry ]
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%i.09 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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; CHECK: DW_OP_WASM_location 0x0 +[[LOCAL_1:[0-9]+]]
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call void @llvm.dbg.value(metadata i32 %b.011, metadata !16, metadata !DIExpression()), !dbg !19
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; CHECK-NOT: DW_OP_WASM_location 0x0 +[[LOCAL_1]]
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; CHECK: DW_OP_WASM_location 0x0 +[[LOCAL_2:[0-9]+]]
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%add = add nsw i32 %b.011, %a.010, !dbg !26
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%inc = add nuw nsw i32 %i.09, 1, !dbg !28
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call void @llvm.dbg.value(metadata i32 %add, metadata !16, metadata !DIExpression()), !dbg !19
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%exitcond = icmp eq i32 %inc, %n, !dbg !21
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br i1 %exitcond, label %for.end, label %for.body, !dbg !24, !llvm.loop !29
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for.end: ; preds = %for.body, %entry
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%b.0.lcssa = phi i32 [ 1, %entry ], [ %add, %for.body ], !dbg !31
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call void @llvm.dbg.value(metadata i32 %b.0.lcssa, metadata !16, metadata !DIExpression()), !dbg !19
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ret i32 %b.0.lcssa, !dbg !32
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 8.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "<unknown>", directory: "")
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!2 = !{}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!7 = distinct !DISubprogram(name: "fib", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!16}
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!16 = !DILocalVariable(name: "b", scope: !7, file: !1, line: 2, type: !10)
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!17 = !DILocation(line: 1, column: 13, scope: !7)
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!18 = !DILocation(line: 2, column: 13, scope: !7)
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!19 = !DILocation(line: 2, column: 20, scope: !7)
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!20 = !DILocation(line: 2, column: 7, scope: !7)
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!21 = !DILocation(line: 3, column: 17, scope: !22)
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!22 = distinct !DILexicalBlock(scope: !23, file: !1, line: 3, column: 3)
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!23 = distinct !DILexicalBlock(scope: !7, file: !1, line: 3, column: 3)
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!24 = !DILocation(line: 3, column: 3, scope: !23)
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!25 = !DILocation(line: 2, column: 10, scope: !7)
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!26 = !DILocation(line: 6, column: 7, scope: !27)
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!27 = distinct !DILexicalBlock(scope: !22, file: !1, line: 3, column: 27)
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!28 = !DILocation(line: 3, column: 23, scope: !22)
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!29 = distinct !{!29, !24, !30}
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!30 = !DILocation(line: 7, column: 3, scope: !23)
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!31 = !DILocation(line: 0, scope: !7)
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!32 = !DILocation(line: 8, column: 3, scope: !7)
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