1; RUN: opt < %s -passes=lcssa -S | FileCheck %s 2 3; This test ensures that LCSSA does not insert dbg.value intrinsics using 4; insertDebugValuesForPHIs() which effectively cause assignments to be 5; re-ordered. 6; See PR48206 for more information. 7 8define dso_local i32 @_Z5lcssab(i1 zeroext %S2) { 9entry: 10 br label %loop.interior 11 12loop.interior: ; preds = %post.if, %entry 13 br i1 %S2, label %if.true, label %if.false 14 15if.true: ; preds = %loop.interior 16 %X1 = add i32 0, 0 17 br label %post.if 18 19if.false: ; preds = %loop.interior 20 %X2 = add i32 0, 1 21 br label %post.if 22 23post.if: ; preds = %if.false, %if.true 24 %X3 = phi i32 [ %X1, %if.true ], [ %X2, %if.false ], !dbg !21 25 call void @llvm.dbg.value(metadata i32 %X3, metadata !9, metadata !DIExpression()), !dbg !21 26 %Y1 = add i32 4, %X3, !dbg !22 27 call void @llvm.dbg.value(metadata i32 %Y1, metadata !9, metadata !DIExpression()), !dbg !22 28 br i1 %S2, label %loop.exit, label %loop.interior, !dbg !23 29 30loop.exit: ; preds = %post.if 31; CHECK: loop.exit: 32; CHECK-NEXT: %X3.lcssa = phi i32 33; CHECK-NOT: call void @llvm.dbg.value 34 %X4 = add i32 3, %X3 35 ret i32 %X4 36} 37 38declare void @llvm.dbg.value(metadata, metadata, metadata) 39 40!llvm.dbg.cu = !{!0} 41!llvm.debugify = !{!3, !4} 42!llvm.module.flags = !{!5} 43 44!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify and Author", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 45!1 = !DIFile(filename: "./testcase.ll", directory: "/") 46!2 = !{} 47!3 = !{i32 11} 48!4 = !{i32 5} 49!5 = !{i32 2, !"Debug Info Version", i32 3} 50!6 = distinct !DISubprogram(name: "_Z5lcssab", linkageName: "_Z5lcssab", scope: null, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !{!9}) 51!7 = !DISubroutineType(types: !2) 52!9 = !DILocalVariable(name: "var", scope: !6, file: !1, line: 3, type: !10) 53!10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned) 54!21 = !DILocation(line: 7, column: 1, scope: !6) 55!22 = !DILocation(line: 8, column: 1, scope: !6) 56!23 = !DILocation(line: 9, column: 1, scope: !6) 57 58