76 lines
3.1 KiB
LLVM
76 lines
3.1 KiB
LLVM
; RUN: llc -O0 %s -mtriple=aarch64 -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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define i32 @func(i32) #0 !dbg !8 {
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call void @llvm.dbg.value(metadata i32 %0, 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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%2 = icmp slt i32 %0, 0, !dbg !17
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br i1 %2, label %3, label %4, !dbg !19
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; <label>:3: ; preds = %1
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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 %4, !dbg !20
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; <label>:4: ; preds = %3, %1
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%.0 = phi i32 [ 12, %3 ], [ 1, %1 ]
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; CHECK: ldr w[[REG:[0-9]+]], [sp, #8]
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; CHECK-NEXT: .Ltmp
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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-NEXT: //DEBUG_VALUE: func:c <- $w[[REG]]
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%5 = add nsw i32 %.0, %0, !dbg !22
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call void @llvm.dbg.value(metadata i32 %5, i64 0, metadata !15, metadata !13), !dbg !16
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ret i32 %5, !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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