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08fbde827c
The debug-use flag must be set exactly for uses on DBG_VALUEs. This is so obvious that it can be trivially inferred while parsing. This will reduce noise when printing while omitting an information that has little value to the user. The parser will keep recognizing the flag for compatibility with old `.mir` files. Differential Revision: https://reviews.llvm.org/D53903 llvm-svn: 345671
85 lines
3.3 KiB
LLVM
85 lines
3.3 KiB
LLVM
; RUN: llc -O0 %s -mtriple=aarch64 -stop-after=phi-node-elimination -o - | FileCheck %s
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; Test that a DEBUG_VALUE node is create for variable c after the phi has been
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; converted to a ldr. The DEBUG_VALUE must be *after* the ldr and not before it.
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; Created from the C code, compiled with -O0 -g and then passed through opt -mem2reg:
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;
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; int func(int a)
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; {
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; int c = 1;
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; if (a < 0 ) {
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; c = 12;
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; }
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; return c;
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; }
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;
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; Function Attrs: nounwind
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; CHECK: !14 = !DILocalVariable(name: "c"
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; CHECK-LABEL: name: func
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define i32 @func(i32 %a0) #0 !dbg !8 {
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entry:
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call void @llvm.dbg.value(metadata i32 %a0, i64 0, metadata !12, metadata !13), !dbg !14
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call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !15, metadata !13), !dbg !16
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%v2 = icmp slt i32 %a0, 0, !dbg !17
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br i1 %v2, label %bb2, label %bb3, !dbg !19
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bb2:
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call void @llvm.dbg.value(metadata i32 12, i64 0, metadata !15, metadata !13), !dbg !16
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br label %bb3, !dbg !20
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; CHECK: bb.2.bb2:
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; CHECK: [[REG0:%[0-9]+]]:gpr32 = MOVi32imm 12
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; CHECK: [[PHIREG:%[0-9]+]]:gpr32 = COPY [[REG0]]
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bb3:
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; CHECK: bb.3.bb3:
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; CHECK: [[PHIDEST:%[0-9]+]]:gpr32 = COPY [[PHIREG]]
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; CHECK-NEXT: DBG_VALUE [[PHIDEST]]
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%.0 = phi i32 [ 12, %bb2 ], [ 1, %entry ]
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call void @llvm.dbg.value(metadata i32 %.0, i64 0, metadata !15, metadata !13), !dbg !16
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; CHECK: [[ADD:%[0-9]+]]:gpr32 = nsw ADDWrr [[PHIDEST]]
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; CHECK-NEXT: DBG_VALUE [[ADD]]
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%v5 = add nsw i32 %.0, %a0, !dbg !22
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call void @llvm.dbg.value(metadata i32 %v5, i64 0, metadata !15, metadata !13), !dbg !16
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ret i32 %v5, !dbg !23
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!llvm.ident = !{!7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "a.c", directory: "/tmp")
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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 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{i32 1, !"min_enum_size", i32 4}
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!7 = !{!"clang"}
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!8 = distinct !DISubprogram(name: "func", scope: !1, file: !1, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!9 = !DISubroutineType(types: !10)
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!10 = !{!11, !11}
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!11 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!12 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 1, type: !11)
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!13 = !DIExpression()
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!14 = !DILocation(line: 1, column: 14, scope: !8)
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!15 = !DILocalVariable(name: "c", scope: !8, file: !1, line: 3, type: !11)
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!16 = !DILocation(line: 3, column: 13, scope: !8)
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!17 = !DILocation(line: 4, column: 15, scope: !18)
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!18 = distinct !DILexicalBlock(scope: !8, file: !1, line: 4, column: 13)
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!19 = !DILocation(line: 4, column: 13, scope: !8)
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!20 = !DILocation(line: 6, column: 9, scope: !21)
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!21 = distinct !DILexicalBlock(scope: !18, file: !1, line: 4, column: 21)
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!22 = !DILocation(line: 7, column: 4, scope: !8)
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!23 = !DILocation(line: 8, column: 9, scope: !8)
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