derek.holloway
7502bf64a4
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169 lines
8.2 KiB
LLVM
169 lines
8.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -S -o - -passes=gvn %s | FileCheck %s --check-prefixes=CHECK,MDEP
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; RUN: opt -S -o - -passes='gvn<memoryssa>' %s | FileCheck %s --check-prefixes=CHECK,MSSA
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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%struct.S1 = type { i32, i32 }
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@a2 = common global ptr null, align 8
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@a = common global ptr null, align 8
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@s1 = common global %struct.S1 zeroinitializer, align 8
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; Check that GVN doesn't determine %2 is partially redundant.
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define i32 @volatile_load(i32 %n) {
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; CHECK-LABEL: define i32 @volatile_load(
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; CHECK-SAME: i32 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[CMP6:%.*]] = icmp sgt i32 [[N]], 0
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; CHECK-NEXT: br i1 [[CMP6]], label %[[FOR_BODY_LR_PH:.*]], label %[[FOR_END:.*]]
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; CHECK: [[FOR_BODY_LR_PH]]:
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; CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr @a2, align 8, !tbaa [[ANYPTR_TBAA5:![0-9]+]]
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; CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr @a, align 8, !tbaa [[ANYPTR_TBAA5]]
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; CHECK-NEXT: br label %[[FOR_BODY:.*]]
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; CHECK: [[FOR_BODY]]:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, %[[FOR_BODY_LR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[FOR_BODY]] ]
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; CHECK-NEXT: [[S_09:%.*]] = phi i32 [ 0, %[[FOR_BODY_LR_PH]] ], [ [[ADD:%.*]], %[[FOR_BODY]] ]
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; CHECK-NEXT: [[P_08:%.*]] = phi ptr [ [[TMP0]], %[[FOR_BODY_LR_PH]] ], [ [[INCDEC_PTR:%.*]], %[[FOR_BODY]] ]
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; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[P_08]], align 4, !tbaa [[INT_TBAA9:![0-9]+]]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[TMP1]], i64 [[INDVARS_IV]]
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; CHECK-NEXT: store i32 [[TMP2]], ptr [[ARRAYIDX]], align 4, !tbaa [[INT_TBAA9]]
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; CHECK-NEXT: [[TMP3:%.*]] = load volatile i32, ptr [[P_08]], align 4, !tbaa [[INT_TBAA9]]
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; CHECK-NEXT: [[ADD]] = add nsw i32 [[TMP3]], [[S_09]]
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
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; CHECK-NEXT: [[INCDEC_PTR]] = getelementptr inbounds i32, ptr [[P_08]], i64 1
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; CHECK-NEXT: [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i32 [[LFTR_WIDEIV]], [[N]]
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; CHECK-NEXT: br i1 [[EXITCOND]], label %[[FOR_BODY]], label %[[FOR_COND_FOR_END_CRIT_EDGE:.*]]
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; CHECK: [[FOR_COND_FOR_END_CRIT_EDGE]]:
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; CHECK-NEXT: br label %[[FOR_END]]
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; CHECK: [[FOR_END]]:
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; CHECK-NEXT: [[S_0_LCSSA:%.*]] = phi i32 [ [[ADD]], %[[FOR_COND_FOR_END_CRIT_EDGE]] ], [ 0, %[[ENTRY]] ]
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; CHECK-NEXT: ret i32 [[S_0_LCSSA]]
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;
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entry:
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%cmp6 = icmp sgt i32 %n, 0
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br i1 %cmp6, label %for.body.lr.ph, label %for.end
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for.body.lr.ph:
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%0 = load ptr, ptr @a2, align 8, !tbaa !1
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%1 = load ptr, ptr @a, align 8, !tbaa !1
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
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%s.09 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ]
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%p.08 = phi ptr [ %0, %for.body.lr.ph ], [ %incdec.ptr, %for.body ]
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%2 = load i32, ptr %p.08, align 4, !tbaa !5
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%arrayidx = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
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store i32 %2, ptr %arrayidx, align 4, !tbaa !5
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%3 = load volatile i32, ptr %p.08, align 4, !tbaa !5
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%add = add nsw i32 %3, %s.09
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%incdec.ptr = getelementptr inbounds i32, ptr %p.08, i64 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp ne i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.body, label %for.cond.for.end_crit_edge
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for.cond.for.end_crit_edge:
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%add.lcssa = phi i32 [ %add, %for.body ]
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br label %for.end
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for.end:
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%s.0.lcssa = phi i32 [ %add.lcssa, %for.cond.for.end_crit_edge ], [ 0, %entry ]
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ret i32 %s.0.lcssa
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}
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; %1 is partially redundant if %0 can be widened to a 64-bit load.
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; But we should not widen %0 to 64-bit load.
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define i32 @overaligned_load(i32 %a, ptr nocapture %b) !dbg !13 {
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; CHECK-LABEL: define i32 @overaligned_load(
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; CHECK-SAME: i32 [[A:%.*]], ptr captures(none) [[B:%.*]]) !dbg [[DBG11:![0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[A]], 0, !dbg [[DBG14:![0-9]+]]
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; CHECK-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]], !dbg [[DBG14]]
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; CHECK: [[IF_THEN]]:
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr @s1, align 8, !dbg [[DBG15:![0-9]+]], !tbaa [[INT_TBAA9]]
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; CHECK-NEXT: br label %[[IF_END:.*]], !dbg [[DBG15]]
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; CHECK: [[IF_ELSE]]:
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 2, !dbg [[DBG16:![0-9]+]]
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; CHECK-NEXT: store i32 10, ptr [[ARRAYIDX]], align 4, !dbg [[DBG16]], !tbaa [[INT_TBAA9]]
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; CHECK-NEXT: br label %[[IF_END]], !dbg [[DBG16]]
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; CHECK: [[IF_END]]:
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; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ [[TMP0]], %[[IF_THEN]] ], [ 0, %[[IF_ELSE]] ]
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; CHECK-NEXT: [[P_0:%.*]] = phi ptr [ @s1, %[[IF_THEN]] ], [ [[B]], %[[IF_ELSE]] ]
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; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i32, ptr [[P_0]], i64 1, !dbg [[DBG17:![0-9]+]]
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; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[ADD_PTR]], align 4, !dbg [[DBG17]], !tbaa [[INT_TBAA9]]
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; CHECK-NEXT: [[ADD1:%.*]] = add nsw i32 [[TMP1]], [[I_0]], !dbg [[DBG17]]
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; CHECK-NEXT: ret i32 [[ADD1]], !dbg [[DBG17]]
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;
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entry:
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%cmp = icmp sgt i32 %a, 0, !dbg !14
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br i1 %cmp, label %if.then, label %if.else, !dbg !14
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if.then:
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%0 = load i32, ptr @s1, align 8, !tbaa !5, !dbg !15
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br label %if.end, !dbg !15
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if.else:
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%arrayidx = getelementptr inbounds i32, ptr %b, i64 2, !dbg !16
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store i32 10, ptr %arrayidx, align 4, !tbaa !5, !dbg !16
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br label %if.end, !dbg !16
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if.end:
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%i.0 = phi i32 [ %0, %if.then ], [ 0, %if.else ]
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%p.0 = phi ptr [ @s1, %if.then ], [ %b, %if.else ]
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%add.ptr = getelementptr inbounds i32, ptr %p.0, i64 1, !dbg !17
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%1 = load i32, ptr %add.ptr, align 4, !tbaa !5, !dbg !17
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%add1 = add nsw i32 %1, %i.0, !dbg !17
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ret i32 %add1, !dbg !17
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}
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!1 = !{!2, !2, i64 0}
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!2 = !{!"any pointer", !3, i64 0}
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!3 = !{!"omnipotent char", !4, i64 0}
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!4 = !{!"Simple C/C++ TBAA"}
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!5 = !{!6, !6, i64 0}
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!6 = !{!"int", !3, i64 0}
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!llvm.module.flags = !{!7, !8, !9}
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!llvm.dbg.cu = !{!18}
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{i32 1, !"PIC Level", i32 2}
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!10 = !{}
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!11 = !DISubroutineType(types: !10)
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!12 = !DIFile(filename: "test.cpp", directory: "/tmp")
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!13 = distinct !DISubprogram(name: "test", scope: !12, file: !12, line: 99, type: !11, isLocal: false, isDefinition: true, scopeLine: 100, flags: DIFlagPrototyped, isOptimized: false, unit: !18, retainedNodes: !10)
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!14 = !DILocation(line: 100, column: 1, scope: !13)
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!15 = !DILocation(line: 101, column: 1, scope: !13)
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!16 = !DILocation(line: 102, column: 1, scope: !13)
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!17 = !DILocation(line: 103, column: 1, scope: !13)
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!18 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang",
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file: !12,
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isOptimized: true, flags: "-O2",
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splitDebugFilename: "abc.debug", emissionKind: 2)
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;.
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; CHECK: [[META3:![0-9]+]] = distinct !DICompileUnit(language: DW_LANG_C99, file: [[META4:![0-9]+]], producer: "clang", isOptimized: true, flags: "-O2", runtimeVersion: 0, splitDebugFilename: "abc.debug", emissionKind: LineTablesOnly)
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; CHECK: [[META4]] = !DIFile(filename: "{{.*}}test.cpp", directory: {{.*}})
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; CHECK: [[ANYPTR_TBAA5]] = !{[[META6:![0-9]+]], [[META6]], i64 0}
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; CHECK: [[META6]] = !{!"any pointer", [[META7:![0-9]+]], i64 0}
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; CHECK: [[META7]] = !{!"omnipotent char", [[META8:![0-9]+]], i64 0}
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; CHECK: [[META8]] = !{!"Simple C/C++ TBAA"}
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; CHECK: [[INT_TBAA9]] = !{[[META10:![0-9]+]], [[META10]], i64 0}
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; CHECK: [[META10]] = !{!"int", [[META7]], i64 0}
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; CHECK: [[DBG11]] = distinct !DISubprogram(name: "test", scope: [[META4]], file: [[META4]], line: 99, type: [[META12:![0-9]+]], scopeLine: 100, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: [[META3]], retainedNodes: [[META13:![0-9]+]])
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; CHECK: [[META12]] = !DISubroutineType(types: [[META13]])
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; CHECK: [[META13]] = !{}
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; CHECK: [[DBG14]] = !DILocation(line: 100, column: 1, scope: [[DBG11]])
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; CHECK: [[DBG15]] = !DILocation(line: 101, column: 1, scope: [[DBG11]])
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; CHECK: [[DBG16]] = !DILocation(line: 102, column: 1, scope: [[DBG11]])
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; CHECK: [[DBG17]] = !DILocation(line: 103, column: 1, scope: [[DBG11]])
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;.
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;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
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; MDEP: {{.*}}
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; MSSA: {{.*}}
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