derek.holloway
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84 lines
4.0 KiB
LLVM
84 lines
4.0 KiB
LLVM
; RUN: opt < %s -passes=constraint-elimination -S | FileCheck %s
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; Check that checkAndReplaceCondition() salvages the debug value information after replacing
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; the conditions (`%c.1` and `%t.2` in this test) with the speculated constants (GitHub Issue
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; #135736).
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; In particular, the debug value record uses should not be replaced if they come before the
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; context instrtuction (e.g., `%t.2` in this example).
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declare void @llvm.assume(i1 noundef) #0
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declare void @may_unwind()
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declare void @use(i1)
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define i1 @assume_single_bb_conditions_after_assume(i8 %a, i8 %b, i1 %c) !dbg !5 {
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; CHECK-LABEL: define i1 @assume_single_bb_conditions_after_assume(
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; CHECK: [[CMP_1:%.*]] = icmp ule i8 [[ADD_1:%.*]], [[B:%.*]], !dbg [[DBG12:![0-9]+]]
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; CHECK-NEXT: [[C_1:%.*]] = icmp ule i8 [[ADD_1]], [[B]], !dbg [[DBG13:![0-9]+]]
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; CHECK-NEXT: #dbg_value(i1 [[C_1]], [[META9:![0-9]+]], !DIExpression(), [[META14:![0-9]+]])
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; CHECK-NEXT: call void @use(i1 [[C_1]]), !dbg [[DBG15:![0-9]+]]
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; CHECK-NEXT: #dbg_value(i1 [[C_1]], [[META9]], !DIExpression(), [[META14]])
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; CHECK-NEXT: call void @may_unwind(), !dbg [[DBG16:![0-9]+]]
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; CHECK-NEXT: #dbg_value(i1 [[C_1]], [[META9]], !DIExpression(), [[META14]])
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP_1]]), !dbg [[DBG17:![0-9]+]]
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; CHECK-NEXT: #dbg_value(i1 [[C_1]], [[META9]], !DIExpression(), [[META14]])
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; CHECK-NEXT: #dbg_value(i1 true, [[META9]], !DIExpression(), [[META14]])
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; CHECK-NEXT: [[RES_1:%.*]] = xor i1 true, true, !dbg [[DBG18:![0-9]+]]
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;
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%add.1 = add nuw nsw i8 %a, 1, !dbg !11
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%cmp.1 = icmp ule i8 %add.1, %b, !dbg !12
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%c.1 = icmp ule i8 %add.1, %b, !dbg !13
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#dbg_value(i1 %c.1, !9, !DIExpression(), !14)
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call void @use(i1 %c.1), !dbg !15
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#dbg_value(i1 %c.1, !9, !DIExpression(), !14)
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call void @may_unwind(), !dbg !16
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#dbg_value(i1 %c.1, !9, !DIExpression(), !14)
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call void @llvm.assume(i1 %cmp.1), !dbg !17
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#dbg_value(i1 %c.1, !9, !DIExpression(), !14)
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%t.2 = icmp ule i8 %a, %b, !dbg !14
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#dbg_value(i1 %c.1, !9, !DIExpression(), !14)
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%res.1 = xor i1 %c.1, %t.2, !dbg !18
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%add.2 = add nuw nsw i8 %a, 2, !dbg !19
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%c.2 = icmp ule i8 %add.2, %b, !dbg !20
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%res.2 = xor i1 %res.1, %c.2, !dbg !21
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ret i1 %res.2, !dbg !22
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}
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attributes #0 = { nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write) }
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!llvm.dbg.cu = !{!0}
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!llvm.debugify = !{!2, !3}
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!llvm.module.flags = !{!4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "/app/example.ll", directory: "/")
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!2 = !{i32 12}
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!3 = !{i32 8}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!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)
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!6 = !DISubroutineType(types: !7)
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!7 = !{}
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!8 = !{!9}
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!9 = !DILocalVariable(name: "4", scope: !5, file: !1, line: 7, type: !10)
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!10 = !DIBasicType(name: "ty8", size: 8, encoding: DW_ATE_unsigned)
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!11 = !DILocation(line: 1, column: 1, scope: !5)
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!12 = !DILocation(line: 2, column: 1, scope: !5)
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!13 = !DILocation(line: 3, column: 1, scope: !5)
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!14 = !DILocation(line: 7, column: 1, scope: !5)
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!15 = !DILocation(line: 4, column: 1, scope: !5)
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!16 = !DILocation(line: 5, column: 1, scope: !5)
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!17 = !DILocation(line: 6, column: 1, scope: !5)
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!18 = !DILocation(line: 8, column: 1, scope: !5)
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!19 = !DILocation(line: 9, column: 1, scope: !5)
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!20 = !DILocation(line: 10, column: 1, scope: !5)
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!21 = !DILocation(line: 11, column: 1, scope: !5)
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!22 = !DILocation(line: 12, column: 1, scope: !5)
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; CHECK: [[META9]] = !DILocalVariable(name: "4",
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; CHECK: [[DBG12]] = !DILocation(line: 2, column: 1,
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; CHECK: [[DBG13]] = !DILocation(line: 3, column: 1,
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; CHECK: [[META14]] = !DILocation(line: 7, column: 1,
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; CHECK: [[DBG18]] = !DILocation(line: 8, column: 1,
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;.
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