| ; RUN: opt < %s -passes=lcssa -S | FileCheck %s |
| |
| ; This test ensures that LCSSA does not insert dbg.value intrinsics using |
| ; insertDebugValuesForPHIs() which effectively cause assignments to be |
| ; re-ordered. |
| ; See PR48206 for more information. |
| |
| define dso_local i32 @_Z5lcssab(i1 zeroext %S2) { |
| entry: |
| br label %loop.interior |
| |
| loop.interior: ; preds = %post.if, %entry |
| br i1 %S2, label %if.true, label %if.false |
| |
| if.true: ; preds = %loop.interior |
| %X1 = add i32 0, 0 |
| br label %post.if |
| |
| if.false: ; preds = %loop.interior |
| %X2 = add i32 0, 1 |
| br label %post.if |
| |
| post.if: ; preds = %if.false, %if.true |
| %X3 = phi i32 [ %X1, %if.true ], [ %X2, %if.false ], !dbg !21 |
| call void @llvm.dbg.value(metadata i32 %X3, metadata !9, metadata !DIExpression()), !dbg !21 |
| %Y1 = add i32 4, %X3, !dbg !22 |
| call void @llvm.dbg.value(metadata i32 %Y1, metadata !9, metadata !DIExpression()), !dbg !22 |
| br i1 %S2, label %loop.exit, label %loop.interior, !dbg !23 |
| |
| loop.exit: ; preds = %post.if |
| ; CHECK: loop.exit: |
| ; CHECK-NEXT: %X3.lcssa = phi i32 |
| ; CHECK-NOT: call void @llvm.dbg.value |
| %X4 = add i32 3, %X3 |
| ret i32 %X4 |
| } |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.debugify = !{!3, !4} |
| !llvm.module.flags = !{!5} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify and Author", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "./testcase.ll", directory: "/") |
| !2 = !{} |
| !3 = !{i32 11} |
| !4 = !{i32 5} |
| !5 = !{i32 2, !"Debug Info Version", i32 3} |
| !6 = distinct !DISubprogram(name: "_Z5lcssab", linkageName: "_Z5lcssab", scope: null, file: !1, line: 1, type: !7, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !{!9}) |
| !7 = !DISubroutineType(types: !2) |
| !9 = !DILocalVariable(name: "var", scope: !6, file: !1, line: 3, type: !10) |
| !10 = !DIBasicType(name: "ty32", size: 32, encoding: DW_ATE_unsigned) |
| !21 = !DILocation(line: 7, column: 1, scope: !6) |
| !22 = !DILocation(line: 8, column: 1, scope: !6) |
| !23 = !DILocation(line: 9, column: 1, scope: !6) |
| |