derek.holloway
7502bf64a4
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230 lines
10 KiB
LLVM
230 lines
10 KiB
LLVM
; REQUIRES: x86_64-linux
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; REQUIRES: asserts
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; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/non-probe-stale-profile-matching.prof --salvage-stale-profile -S --debug-only=sample-profile,sample-profile-matcher,sample-profile-impl -profile-isfs 2>&1 | FileCheck %s
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; The profiled source code:
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; volatile int x = 1;
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; __attribute__((noinline)) int bar(int p) {
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; return p;
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; }
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; __attribute__((always_inline)) int foo(int i, int p) {
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; if (i % 10) return bar(p);
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; else return bar(p + 1);
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; }
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; int main() {
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; for (int i = 0; i < 1000 * 1000; i++) {
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; x += foo(i, x);
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; x += bar(x);
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; x += foo(i, x);
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; x += bar(x);
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; }
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; }
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; The source code for the current build:
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; volatile int x = 1;
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; __attribute__((noinline)) int bar(int p) {
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; return p;
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; }
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; __attribute__((always_inline)) int foo(int i, int p) {
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; if (i % 10) return bar(p);
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; else return bar(p + 1);
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; }
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; int main() {
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; if (x == 0) // code change
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; return 0; // code change
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; for (int i = 0; i < 1000 * 1000; i++) {
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; x += foo(i, x);
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; x += bar(x);
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; if (i < 0) // code change
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; return 0; // code change
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; x += foo(i, x);
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; x += bar(x);
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; }
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; }
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; CHECK: Run stale profile matching for main
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; CHECK: Callsite with callee:foo is matched from 4 to 2
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; CHECK: Callsite with callee:bar is matched from 5 to 3
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; CHECK: Callsite with callee:foo is matched from 8 to 4
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; CHECK: Callsite with callee:bar is matched from 9 to 5
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; CHECK: Run stale profile matching for foo
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; CHECK: Callsite with callee:bar is matched from 1.15 to 1.15
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; CHECK: Callsite with callee:bar is matched from 2 to 2
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; CHECK: Run stale profile matching for bar
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@x = dso_local global i32 1, align 4
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; Function Attrs: noinline nounwind uwtable
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define dso_local i32 @bar(i32 noundef %p) #0 !dbg !9 {
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entry:
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ret i32 %p, !dbg !13
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}
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; Function Attrs: alwaysinline nounwind uwtable
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define dso_local i32 @foo(i32 noundef %i, i32 noundef %p) #1 !dbg !14 {
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entry:
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%rem = srem i32 %i, 10, !dbg !15
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%tobool = icmp ne i32 %rem, 0, !dbg !15
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br i1 %tobool, label %if.then, label %if.else, !dbg !16
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if.then: ; preds = %entry
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%call = call i32 @bar(i32 noundef %p), !dbg !17
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br label %return, !dbg !19
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if.else: ; preds = %entry
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%add = add nsw i32 %p, 1, !dbg !20
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%call1 = call i32 @bar(i32 noundef %add), !dbg !21
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br label %return, !dbg !22
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return: ; preds = %if.else, %if.then
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%retval.0 = phi i32 [ %call, %if.then ], [ %call1, %if.else ], !dbg !23
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ret i32 %retval.0, !dbg !24
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}
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; Function Attrs: nounwind uwtable
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define dso_local i32 @main() #2 !dbg !25 {
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entry:
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%0 = load volatile i32, ptr @x, align 4, !dbg !26, !tbaa !27
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%cmp = icmp eq i32 %0, 0, !dbg !31
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br i1 %cmp, label %if.then, label %if.end, !dbg !26
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if.then: ; preds = %entry
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br label %for.end, !dbg !32
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if.end: ; preds = %entry
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br label %for.cond, !dbg !33
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for.cond: ; preds = %if.end6, %if.end
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%i.0 = phi i32 [ 0, %if.end ], [ %inc, %if.end6 ], !dbg !34
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%cmp1 = icmp slt i32 %i.0, 1000000, !dbg !35
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br i1 %cmp1, label %for.body, label %for.cond.cleanup, !dbg !37
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for.cond.cleanup: ; preds = %for.cond
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br label %cleanup, !dbg !38
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for.body: ; preds = %for.cond
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%1 = load volatile i32, ptr @x, align 4, !dbg !40, !tbaa !27
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%call = call i32 @foo(i32 noundef %i.0, i32 noundef %1), !dbg !41
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%2 = load volatile i32, ptr @x, align 4, !dbg !42, !tbaa !27
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%add = add nsw i32 %2, %call, !dbg !42
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store volatile i32 %add, ptr @x, align 4, !dbg !42, !tbaa !27
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%3 = load volatile i32, ptr @x, align 4, !dbg !43, !tbaa !27
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%call2 = call i32 @bar(i32 noundef %3), !dbg !44
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%4 = load volatile i32, ptr @x, align 4, !dbg !45, !tbaa !27
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%add3 = add nsw i32 %4, %call2, !dbg !45
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store volatile i32 %add3, ptr @x, align 4, !dbg !45, !tbaa !27
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br i1 false, label %if.then5, label %if.end6, !dbg !46
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if.then5: ; preds = %for.body
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br label %cleanup, !dbg !47
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if.end6: ; preds = %for.body
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%5 = load volatile i32, ptr @x, align 4, !dbg !48, !tbaa !27
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%call7 = call i32 @foo(i32 noundef %i.0, i32 noundef %5), !dbg !49
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%6 = load volatile i32, ptr @x, align 4, !dbg !50, !tbaa !27
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%add8 = add nsw i32 %6, %call7, !dbg !50
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store volatile i32 %add8, ptr @x, align 4, !dbg !50, !tbaa !27
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%7 = load volatile i32, ptr @x, align 4, !dbg !51, !tbaa !27
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%call9 = call i32 @bar(i32 noundef %7), !dbg !52
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%8 = load volatile i32, ptr @x, align 4, !dbg !53, !tbaa !27
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%add10 = add nsw i32 %8, %call9, !dbg !53
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store volatile i32 %add10, ptr @x, align 4, !dbg !53, !tbaa !27
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%inc = add nsw i32 %i.0, 1, !dbg !54
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br label %for.cond, !dbg !56, !llvm.loop !57
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cleanup: ; preds = %if.then5, %for.cond.cleanup
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br label %for.end
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for.end: ; preds = %cleanup, %if.then
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ret i32 0, !dbg !61
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}
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; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
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declare void @llvm.lifetime.start.p0(ptr nocapture) #3
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; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
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declare void @llvm.lifetime.end.p0(ptr nocapture) #3
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attributes #0 = { noinline nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" }
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attributes #1 = { alwaysinline nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" }
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attributes #2 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" }
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attributes #3 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5, !6, !7}
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!llvm.ident = !{!8}
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!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 19.0.0git", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, splitDebugInlining: false, debugInfoForProfiling: true, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "path")
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!2 = !{i32 7, !"Dwarf Version", i32 5}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 8, !"PIC Level", i32 2}
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!6 = !{i32 7, !"PIE Level", i32 2}
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!7 = !{i32 7, !"uwtable", i32 2}
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!8 = !{!"clang version 19.0.0git"}
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!9 = distinct !DISubprogram(name: "bar", scope: !10, file: !10, line: 2, type: !11, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
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!10 = !DIFile(filename: "test.c", directory: "path")
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!11 = !DISubroutineType(types: !12)
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!12 = !{}
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!13 = !DILocation(line: 3, column: 3, scope: !9)
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!14 = distinct !DISubprogram(name: "foo", scope: !10, file: !10, line: 6, type: !11, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
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!15 = !DILocation(line: 7, column: 9, scope: !14)
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!16 = !DILocation(line: 7, column: 7, scope: !14)
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!17 = !DILocation(line: 7, column: 23, scope: !18)
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!18 = !DILexicalBlockFile(scope: !14, file: !10, discriminator: 15)
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!19 = !DILocation(line: 7, column: 15, scope: !18)
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!20 = !DILocation(line: 8, column: 21, scope: !14)
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!21 = !DILocation(line: 8, column: 15, scope: !14)
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!22 = !DILocation(line: 8, column: 8, scope: !14)
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!23 = !DILocation(line: 0, scope: !14)
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!24 = !DILocation(line: 9, column: 1, scope: !14)
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!25 = distinct !DISubprogram(name: "main", scope: !10, file: !10, line: 11, type: !11, scopeLine: 11, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
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!26 = !DILocation(line: 12, column: 7, scope: !25)
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!27 = !{!28, !28, i64 0}
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!28 = !{!"int", !29, i64 0}
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!29 = !{!"omnipotent char", !30, i64 0}
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!30 = !{!"Simple C/C++ TBAA"}
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!31 = !DILocation(line: 12, column: 9, scope: !25)
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!32 = !DILocation(line: 13, column: 5, scope: !25)
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!33 = !DILocation(line: 14, column: 8, scope: !25)
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!34 = !DILocation(line: 14, scope: !25)
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!35 = !DILocation(line: 14, column: 21, scope: !36)
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!36 = !DILexicalBlockFile(scope: !25, file: !10, discriminator: 15)
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!37 = !DILocation(line: 14, column: 3, scope: !36)
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!38 = !DILocation(line: 14, column: 3, scope: !39)
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!39 = !DILexicalBlockFile(scope: !25, file: !10, discriminator: 4)
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!40 = !DILocation(line: 15, column: 18, scope: !25)
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!41 = !DILocation(line: 15, column: 11, scope: !25)
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!42 = !DILocation(line: 15, column: 8, scope: !25)
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!43 = !DILocation(line: 16, column: 15, scope: !25)
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!44 = !DILocation(line: 16, column: 11, scope: !25)
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!45 = !DILocation(line: 16, column: 8, scope: !25)
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!46 = !DILocation(line: 17, column: 10, scope: !25)
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!47 = !DILocation(line: 18, column: 8, scope: !25)
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!48 = !DILocation(line: 19, column: 18, scope: !25)
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!49 = !DILocation(line: 19, column: 11, scope: !25)
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!50 = !DILocation(line: 19, column: 8, scope: !25)
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!51 = !DILocation(line: 20, column: 15, scope: !25)
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!52 = !DILocation(line: 20, column: 11, scope: !25)
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!53 = !DILocation(line: 20, column: 8, scope: !25)
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!54 = !DILocation(line: 14, column: 37, scope: !55)
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!55 = !DILexicalBlockFile(scope: !25, file: !10, discriminator: 6)
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!56 = !DILocation(line: 14, column: 3, scope: !55)
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!57 = distinct !{!57, !58, !59, !60}
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!58 = !DILocation(line: 14, column: 3, scope: !25)
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!59 = !DILocation(line: 21, column: 3, scope: !25)
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!60 = !{!"llvm.loop.mustprogress"}
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!61 = !DILocation(line: 22, column: 1, scope: !25)
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