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1; RUN: opt < %s -passes=constraint-elimination -S | FileCheck %s2 3; Check that checkAndReplaceCondition() salvages the debug value information after replacing4; the conditions (`%c.1` and `%t.2` in this test) with the speculated constants (GitHub Issue5; #135736).6; In particular, the debug value record uses should not be replaced if they come before the7; context instrtuction (e.g., `%t.2` in this example).8 9declare void @llvm.assume(i1 noundef) #010 11declare void @may_unwind()12 13declare void @use(i1)14 15define i1 @assume_single_bb_conditions_after_assume(i8 %a, i8 %b, i1 %c) !dbg !5 {16; CHECK-LABEL: define i1 @assume_single_bb_conditions_after_assume(17; CHECK: [[CMP_1:%.*]] = icmp ule i8 [[ADD_1:%.*]], [[B:%.*]], !dbg [[DBG12:![0-9]+]]18; CHECK-NEXT: [[C_1:%.*]] = icmp ule i8 [[ADD_1]], [[B]], !dbg [[DBG13:![0-9]+]]19; CHECK-NEXT: #dbg_value(i1 [[C_1]], [[META9:![0-9]+]], !DIExpression(), [[META14:![0-9]+]])20; CHECK-NEXT: call void @use(i1 [[C_1]]), !dbg [[DBG15:![0-9]+]]21; CHECK-NEXT: #dbg_value(i1 [[C_1]], [[META9]], !DIExpression(), [[META14]])22; CHECK-NEXT: call void @may_unwind(), !dbg [[DBG16:![0-9]+]]23; CHECK-NEXT: #dbg_value(i1 [[C_1]], [[META9]], !DIExpression(), [[META14]])24; CHECK-NEXT: call void @llvm.assume(i1 [[CMP_1]]), !dbg [[DBG17:![0-9]+]]25; CHECK-NEXT: #dbg_value(i1 [[C_1]], [[META9]], !DIExpression(), [[META14]])26; CHECK-NEXT: #dbg_value(i1 true, [[META9]], !DIExpression(), [[META14]])27; CHECK-NEXT: [[RES_1:%.*]] = xor i1 true, true, !dbg [[DBG18:![0-9]+]]28;29 %add.1 = add nuw nsw i8 %a, 1, !dbg !1130 %cmp.1 = icmp ule i8 %add.1, %b, !dbg !1231 %c.1 = icmp ule i8 %add.1, %b, !dbg !1332 #dbg_value(i1 %c.1, !9, !DIExpression(), !14)33 call void @use(i1 %c.1), !dbg !1534 #dbg_value(i1 %c.1, !9, !DIExpression(), !14)35 call void @may_unwind(), !dbg !1636 #dbg_value(i1 %c.1, !9, !DIExpression(), !14)37 call void @llvm.assume(i1 %cmp.1), !dbg !1738 #dbg_value(i1 %c.1, !9, !DIExpression(), !14)39 %t.2 = icmp ule i8 %a, %b, !dbg !1440 #dbg_value(i1 %c.1, !9, !DIExpression(), !14)41 %res.1 = xor i1 %c.1, %t.2, !dbg !1842 %add.2 = add nuw nsw i8 %a, 2, !dbg !1943 %c.2 = icmp ule i8 %add.2, %b, !dbg !2044 %res.2 = xor i1 %res.1, %c.2, !dbg !2145 ret i1 %res.2, !dbg !2246}47 48attributes #0 = { nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write) }49 50!llvm.dbg.cu = !{!0}51!llvm.debugify = !{!2, !3}52!llvm.module.flags = !{!4}53 54!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)55!1 = !DIFile(filename: "/app/example.ll", directory: "/")56!2 = !{i32 12}57!3 = !{i32 8}58!4 = !{i32 2, !"Debug Info Version", i32 3}59!5 = distinct !DISubprogram(name: "assume_single_bb_conditions_after_assume", linkageName: "assume_single_bb_conditions_after_assume", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)60!6 = !DISubroutineType(types: !7)61!7 = !{}62!8 = !{!9}63!9 = !DILocalVariable(name: "4", scope: !5, file: !1, line: 7, type: !10)64!10 = !DIBasicType(name: "ty8", size: 8, encoding: DW_ATE_unsigned)65!11 = !DILocation(line: 1, column: 1, scope: !5)66!12 = !DILocation(line: 2, column: 1, scope: !5)67!13 = !DILocation(line: 3, column: 1, scope: !5)68!14 = !DILocation(line: 7, column: 1, scope: !5)69!15 = !DILocation(line: 4, column: 1, scope: !5)70!16 = !DILocation(line: 5, column: 1, scope: !5)71!17 = !DILocation(line: 6, column: 1, scope: !5)72!18 = !DILocation(line: 8, column: 1, scope: !5)73!19 = !DILocation(line: 9, column: 1, scope: !5)74!20 = !DILocation(line: 10, column: 1, scope: !5)75!21 = !DILocation(line: 11, column: 1, scope: !5)76!22 = !DILocation(line: 12, column: 1, scope: !5)77 78; CHECK: [[META9]] = !DILocalVariable(name: "4",79; CHECK: [[DBG12]] = !DILocation(line: 2, column: 1,80; CHECK: [[DBG13]] = !DILocation(line: 3, column: 1,81; CHECK: [[META14]] = !DILocation(line: 7, column: 1,82; CHECK: [[DBG18]] = !DILocation(line: 8, column: 1,83;.84