refine the regression test

Author: Apochens

llvm/test/Transforms/NewGVN/salvage-trivially-dead-inst.ll

@@ -5,54 +5,29 @@
 
 ; CHECK: #dbg_value(i8 %tmp, [[META11:![0-9]+]], !DIExpression(DW_OP_constu, 8, DW_OP_eq, DW_OP_stack_value), [[META26:![0-9]+]])
 ; CHECK: [[META11]] = !DILocalVariable(name: "2"
-; CHECK: [[META26]] = !DILocation(line: 3
+; CHECK: [[META26]] = !DILocation(line: 2
 
 define void @test13() !dbg !5 {
-bb:
-  br label %bb1
-
-bb1:
+entry:
   %tmp = load i8, ptr null, align 1
-  %tmp2 = icmp eq i8 %tmp, 8, !dbg !26
-    #dbg_value(i1 %tmp2, !11, !DIExpression(), !26)
-  br label %bb3
-
-bb3:
-  %tmp4 = phi ptr [ null, %bb1 ], [ %tmp6, %bb3 ]
-  %tmp5 = phi i32 [ undef, %bb1 ], [ %tmp9, %bb3 ]
-  %tmp6 = getelementptr i8, ptr %tmp4, i64 1
-  %tmp7 = load i8, ptr %tmp4, align 1
-  %tmp8 = sext i8 %tmp7 to i32
-  %tmp9 = mul i32 %tmp5, %tmp8
-  %tmp10 = load i8, ptr %tmp6, align 1
-  %tmp11 = icmp eq i8 %tmp10, 0
-  br i1 %tmp11, label %bb12, label %bb3
-
-bb12:
-  %tmp13 = phi i32 [ %tmp9, %bb3 ]
-  %tmp14 = icmp eq i32 %tmp13, 0
-  br i1 %tmp14, label %bb1, label %bb15
-
-bb15:
-  call void (...) @bar()
-  br label %bb1
+  %tmp2 = icmp eq i8 %tmp, 8, !dbg !13
+    #dbg_value(i1 %tmp2, !11, !DIExpression(), !13)
+  ret void
 }
 
-declare void @bar(...)
-
 !llvm.dbg.cu = !{!0}
 !llvm.debugify = !{!2, !3}
 !llvm.module.flags = !{!4}
 
 !0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
 !1 = !DIFile(filename: "/app/example.ll", directory: "/")
-!2 = !{i32 18}
-!3 = !{i32 12}
+!2 = !{i32 3}
+!3 = !{i32 2}
 !4 = !{i32 2, !"Debug Info Version", i32 3}
 !5 = distinct !DISubprogram(name: "test13", linkageName: "test13", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
 !6 = !DISubroutineType(types: !7)
 !7 = !{}
 !8 = !{!11}
 !10 = !DIBasicType(name: "ty8", size: 8, encoding: DW_ATE_unsigned)
-!11 = !DILocalVariable(name: "2", scope: !5, file: !1, line: 3, type: !10)
-!26 = !DILocation(line: 3, column: 1, scope: !5)
+!11 = !DILocalVariable(name: "2", scope: !5, file: !1, line: 2, type: !10)
+!13 = !DILocation(line: 2, column: 1, scope: !5)