llvm/test/Transforms/SampleProfile/remarks.ll - llvm-project - Git at Google


            
            ; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/remarks.prof -S -pass-remarks=sample-profile -pass-remarks-output=%t.opt.yaml 2>&1 | FileCheck %s

            
            ; RUN: FileCheck %s -check-prefixes=YAML,YAML-NO-ANNOTATE < %t.opt.yaml


            ; RUN: opt < %s -passes=sample-profile -annotate-sample-profile-inline-phase -sample-profile-file=%S/Inputs/remarks.prof -S -pass-remarks=sample-profile -pass-remarks-output=%t.opt.yaml 2>&1 | FileCheck %s

            
            ; RUN: FileCheck %s -check-prefixes=YAML,YAML-ANNOTATE < %t.opt.yaml


            ; Original test case.

            
            ;

            
            ;     1    #include <stdlib.h>

            
            ;     2

            
            ;     3    long long foo() {

            
            ;     4      long long int sum = 0;

            
            ;     5      for (int i = 0; i < 500000000; i++)

            
            ;     6        if (i < 1000)

            
            ;     7          sum -= i;

            
            ;     8        else

            
            ;     9          sum += -i * rand();

            
            ;    10      return sum;

            
            ;    11    }

            
            ;    12

            
            ;    13    int main() { return foo() > 0; }


            ; We are expecting foo() to be inlined in main() (almost all the cycles are

            
            ; spent inside foo).

            
            ; CHECK: remark: remarks.cc:13:21: '_Z3foov' inlined into 'main' to match profiling context with (cost=130, threshold=3000) at callsite main:0:21;

            
            ; CHECK: remark: remarks.cc:9:19: 'rand' inlined into 'main' to match profiling context with (cost=always): always inline attribute at callsite _Z3foov:6:19 @ main:0:21;


            ; The back edge for the loop is the hottest edge in the loop subgraph.

            
            ; CHECK: remark: remarks.cc:6:9: most popular destination for conditional branches at remarks.cc:5:3


            ; The predicate almost always chooses the 'else' branch.

            
            ; CHECK: remark: remarks.cc:9:15: most popular destination for conditional branches at remarks.cc:6:9


            ; Checking to see if YAML file is generated and contains remarks

            
            ;YAML:       --- !Passed

            
            ;YAML-NO-ANNOTATE-NEXT:  Pass:            sample-profile-inline

            
            ;YAML-ANNOTATE-NEXT:  Pass:            main-sample-profile-inline

            
            ;YAML-NEXT:  Name:            Inlined

            
            ;YAML-NEXT:  DebugLoc:        { File: remarks.cc, Line: 13, Column: 21 }

            
            ;YAML-NEXT:  Function:        main

            
            ;YAML-NEXT:  Args:

            
            ;YAML-NEXT:    - String:          ''''

            
            ;YAML-NEXT:    - Callee:          _Z3foov

            
            ;YAML-NEXT:      DebugLoc:        { File: remarks.cc, Line: 3, Column: 0 }

            
            ;YAML-NEXT:    - String:          ''' inlined into '

            
            ;YAML-NEXT:    - Caller:          main

            
            ;YAML-NEXT:        DebugLoc:        { File: remarks.cc, Line: 13, Column: 0 }

            
            ;YAML-NEXT:    - String:          ''''

            
            ;YAML-NEXT:    - String:          ' to match profiling context'

            
            ;YAML-NEXT:    - String:          ' with '

            
            ;YAML-NEXT:    - String:          '(cost='

            
            ;YAML-NEXT:    - Cost:            '130'

            
            ;YAML-NEXT:    - String:          ', threshold='

            
            ;YAML-NEXT:    - Threshold:       '3000'

            
            ;YAML-NEXT:    - String:          ')'

            
            ;YAML-NEXT:    - String:          ' at callsite '

            
            ;YAML-NEXT:    - String:          main

            
            ;YAML-NEXT:    - String:          ':'

            
            ;YAML-NEXT:    - Line:            '0'

            
            ;YAML-NEXT:    - String:          ':'

            
            ;YAML-NEXT:    - Column:          '21'

            
            ;YAML-NEXT:    - String:          ';'

            
            ;YAML-NEXT:  ...

            
            ;YAML:       --- !Passed

            
            ;YAML-NO-ANNOTATE-NEXT:  Pass:            sample-profile-inline

            
            ;YAML-ANNOTATE-NEXT:  Pass:            main-sample-profile-inline

            
            ;YAML-NEXT:  Name:            AlwaysInline

            
            ;YAML-NEXT:  DebugLoc:        { File: remarks.cc, Line: 9, Column: 19 }

            
            ;YAML-NEXT:  Function:        main

            
            ;YAML-NEXT:  Args:

            
            ;YAML-NEXT:    - String:          ''''

            
            ;YAML-NEXT:    - Callee:          rand

            
            ;YAML-NEXT:      DebugLoc:        { File: remarks.cc, Line: 90, Column: 0 }

            
            ;YAML-NEXT:    - String:          ''' inlined into '''

            
            ;YAML-NEXT:    - Caller:          main

            
            ;YAML-NEXT:      DebugLoc:        { File: remarks.cc, Line: 13, Column: 0 }

            
            ;YAML-NEXT:    - String:          ''''

            
            ;YAML-NEXT:    - String:          ' to match profiling context'

            
            ;YAML-NEXT:    - String:          ' with '

            
            ;YAML-NEXT:    - String:          '(cost=always)'

            
            ;YAML-NEXT:    - String:          ': '

            
            ;YAML-NEXT:    - Reason:          always inline attribute

            
            ;YAML-NEXT:    - String:          ' at callsite '

            
            ;YAML-NEXT:    - String:          _Z3foov

            
            ;YAML-NEXT:    - String:          ':'

            
            ;YAML-NEXT:    - Line:            '6'

            
            ;YAML-NEXT:    - String:          ':'

            
            ;YAML-NEXT:    - Column:          '19'

            
            ;YAML-NEXT:    - String:          ' @ '

            
            ;YAML-NEXT:    - String:          main

            
            ;YAML-NEXT:    - String:          ':'

            
            ;YAML-NEXT:    - Line:            '0'

            
            ;YAML-NEXT:    - String:          ':'

            
            ;YAML-NEXT:    - Column:          '21'

            
            ;YAML-NEXT:    - String:          ';'

            
            ;YAML:  --- !Analysis

            
            ;YAML-NEXT:  Pass:            sample-profile

            
            ;YAML-NEXT:  Name:            AppliedSamples

            
            ;YAML-NEXT:  DebugLoc:        { File: remarks.cc, Line: 5, Column: 12 }

            
            ;YAML-NEXT:  Function:        main

            
            ;YAML-NEXT:  Args:

            
            ;YAML-NEXT:    - String:          'Applied '

            
            ;YAML-NEXT:    - NumSamples:      '18305'

            
            ;YAML-NEXT:    - String:          ' samples from profile (offset: '

            
            ;YAML-NEXT:    - LineOffset:      '2'

            
            ;YAML-NEXT:    - String:          ')'

            
            ;YAML-NEXT:  ...

            
            ;YAML:  --- !Passed

            
            ;YAML-NEXT:  Pass:            sample-profile

            
            ;YAML-NEXT:  Name:            PopularDest

            
            ;YAML-NEXT:  DebugLoc:        { File: remarks.cc, Line: 6, Column: 9 }

            
            ;YAML-NEXT:  Function:        main

            
            ;YAML-NEXT:  Args:

            
            ;YAML-NEXT:    - String:          'most popular destination for conditional branches at '

            
            ;YAML-NEXT:    - CondBranchesLoc: 'remarks.cc:5:3'

            
            ;YAML-NEXT:      DebugLoc:        { File: remarks.cc, Line: 5, Column: 3 }

            
            ;YAML-NEXT:  ...


            ; Function Attrs: nounwind uwtable

            
            define i64 @_Z3foov() #0 !dbg !4 {

            
            entry:

            
              %sum = alloca i64, align 8

            
              %i = alloca i32, align 4

            
              call void @llvm.lifetime.start.p0(ptr %sum) #4, !dbg !19

            
              call void @llvm.dbg.declare(metadata ptr %sum, metadata !9, metadata !20), !dbg !21

            
              store i64 0, ptr %sum, align 8, !dbg !21, !tbaa !22

            
              call void @llvm.lifetime.start.p0(ptr %i) #4, !dbg !26

            
              call void @llvm.dbg.declare(metadata ptr %i, metadata !10, metadata !20), !dbg !27

            
              store i32 0, ptr %i, align 4, !dbg !27, !tbaa !28

            
              br label %for.cond, !dbg !26


            for.cond:                                         ; preds = %for.inc, %entry

            
              %0 = load i32, ptr %i, align 4, !dbg !30, !tbaa !28

            
              %cmp = icmp slt i32 %0, 500000000, !dbg !34

            
              br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !35


            for.cond.cleanup:                                 ; preds = %for.cond

            
              call void @llvm.lifetime.end.p0(ptr %i) #4, !dbg !36

            
              br label %for.end


            for.body:                                         ; preds = %for.cond

            
              %1 = load i32, ptr %i, align 4, !dbg !38, !tbaa !28

            
              %cmp1 = icmp slt i32 %1, 1000, !dbg !40

            
              br i1 %cmp1, label %if.then, label %if.else, !dbg !41


            if.then:                                          ; preds = %for.body

            
              %2 = load i32, ptr %i, align 4, !dbg !42, !tbaa !28

            
              %conv = sext i32 %2 to i64, !dbg !42

            
              %3 = load i64, ptr %sum, align 8, !dbg !43, !tbaa !22

            
              %sub = sub nsw i64 %3, %conv, !dbg !43

            
              store i64 %sub, ptr %sum, align 8, !dbg !43, !tbaa !22

            
              br label %if.end, !dbg !44


            if.else:                                          ; preds = %for.body

            
              %4 = load i32, ptr %i, align 4, !dbg !45, !tbaa !28

            
              %sub2 = sub nsw i32 0, %4, !dbg !46

            
              %call = call i32 @rand() #4, !dbg !47

            
              %mul = mul nsw i32 %sub2, %call, !dbg !48

            
              %conv3 = sext i32 %mul to i64, !dbg !46

            
              %5 = load i64, ptr %sum, align 8, !dbg !49, !tbaa !22

            
              %add = add nsw i64 %5, %conv3, !dbg !49

            
              store i64 %add, ptr %sum, align 8, !dbg !49, !tbaa !22

            
              br label %if.end


            if.end:                                           ; preds = %if.else, %if.then

            
              br label %for.inc, !dbg !50


            for.inc:                                          ; preds = %if.end

            
              %6 = load i32, ptr %i, align 4, !dbg !51, !tbaa !28

            
              %inc = add nsw i32 %6, 1, !dbg !51

            
              store i32 %inc, ptr %i, align 4, !dbg !51, !tbaa !28

            
              br label %for.cond, !dbg !52


            for.end:                                          ; preds = %for.cond.cleanup

            
              %7 = load i64, ptr %sum, align 8, !dbg !53, !tbaa !22

            
              call void @llvm.lifetime.end.p0(ptr %sum) #4, !dbg !54

            
              ret i64 %7, !dbg !55

            
            }


            ; Function Attrs: nounwind argmemonly

            
            declare void @llvm.lifetime.start.p0(ptr nocapture) #1


            ; Function Attrs: nounwind readnone

            
            declare void @llvm.dbg.declare(metadata, metadata, metadata) #2


            ; Function Attrs: nounwind

            
            define i32 @rand() #3 !dbg !59 {

            
              ret i32 1

            
            }


            ; Function Attrs: nounwind argmemonly

            
            declare void @llvm.lifetime.end.p0(ptr nocapture) #1


            ; Function Attrs: nounwind uwtable

            
            define i32 @main() #0 !dbg !13 {

            
            entry:

            
              %retval = alloca i32, align 4

            
              store i32 0, ptr %retval, align 4

            
              %call = call i64 @_Z3foov(), !dbg !56

            
              %cmp = icmp sgt i64 %call, 0, !dbg !57

            
              %conv = zext i1 %cmp to i32, !dbg !56

            
              ret i32 %conv, !dbg !58

            
            }


            attributes #0 = { nounwind uwtable "use-sample-profile" }

            
            attributes #1 = { nounwind argmemonly }

            
            attributes #2 = { nounwind readnone }

            
            attributes #3 = { nounwind alwaysinline }

            
            attributes #4 = { nounwind }


            !llvm.dbg.cu = !{!0}

            
            !llvm.module.flags = !{!16, !17}

            
            !llvm.ident = !{!18}


            !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 251041) (llvm/trunk 251053)", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)

            
            !1 = !DIFile(filename: "remarks.cc", directory: ".")

            
            !2 = !{}

            
            !4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)

            
            !5 = !DISubroutineType(types: !6)

            
            !6 = !{!7}

            
            !7 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed)

            
            !8 = !{!9, !10}

            
            !9 = !DILocalVariable(name: "sum", scope: !4, file: !1, line: 4, type: !7)

            
            !10 = !DILocalVariable(name: "i", scope: !11, file: !1, line: 5, type: !12)

            
            !11 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 3)

            
            !12 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)

            
            !13 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 13, type: !14, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)

            
            !14 = !DISubroutineType(types: !15)

            
            !15 = !{!12}

            
            !16 = !{i32 2, !"Dwarf Version", i32 4}

            
            !17 = !{i32 2, !"Debug Info Version", i32 3}

            
            !18 = !{!"clang version 3.8.0 (trunk 251041) (llvm/trunk 251053)"}

            
            !19 = !DILocation(line: 4, column: 3, scope: !4)

            
            !20 = !DIExpression()

            
            !21 = !DILocation(line: 4, column: 17, scope: !4)

            
            !22 = !{!23, !23, i64 0}

            
            !23 = !{!"long long", !24, i64 0}

            
            !24 = !{!"omnipotent char", !25, i64 0}

            
            !25 = !{!"Simple C/C++ TBAA"}

            
            !26 = !DILocation(line: 5, column: 8, scope: !11)

            
            !27 = !DILocation(line: 5, column: 12, scope: !11)

            
            !28 = !{!29, !29, i64 0}

            
            !29 = !{!"int", !24, i64 0}

            
            !30 = !DILocation(line: 5, column: 19, scope: !31)

            
            !31 = !DILexicalBlockFile(scope: !32, file: !1, discriminator: 3)

            
            !32 = !DILexicalBlockFile(scope: !33, file: !1, discriminator: 1)

            
            !33 = distinct !DILexicalBlock(scope: !11, file: !1, line: 5, column: 3)

            
            !34 = !DILocation(line: 5, column: 21, scope: !33)

            
            !35 = !DILocation(line: 5, column: 3, scope: !11)

            
            !36 = !DILocation(line: 5, column: 3, scope: !37)

            
            !37 = !DILexicalBlockFile(scope: !33, file: !1, discriminator: 2)

            
            !38 = !DILocation(line: 6, column: 9, scope: !39)

            
            !39 = distinct !DILexicalBlock(scope: !33, file: !1, line: 6, column: 9)

            
            !40 = !DILocation(line: 6, column: 11, scope: !39)

            
            !41 = !DILocation(line: 6, column: 9, scope: !33)

            
            !42 = !DILocation(line: 7, column: 14, scope: !39)

            
            !43 = !DILocation(line: 7, column: 11, scope: !39)

            
            !44 = !DILocation(line: 7, column: 7, scope: !39)

            
            !45 = !DILocation(line: 9, column: 15, scope: !39)

            
            !46 = !DILocation(line: 9, column: 14, scope: !39)

            
            !47 = !DILocation(line: 9, column: 19, scope: !39)

            
            !48 = !DILocation(line: 9, column: 17, scope: !39)

            
            !49 = !DILocation(line: 9, column: 11, scope: !39)

            
            !50 = !DILocation(line: 6, column: 13, scope: !39)

            
            !51 = !DILocation(line: 5, column: 35, scope: !33)

            
            !52 = !DILocation(line: 5, column: 3, scope: !33)

            
            !53 = !DILocation(line: 10, column: 10, scope: !4)

            
            !54 = !DILocation(line: 11, column: 1, scope: !4)

            
            !55 = !DILocation(line: 10, column: 3, scope: !4)

            
            !56 = !DILocation(line: 13, column: 21, scope: !13)

            
            !57 = !DILocation(line: 13, column: 27, scope: !13)

            
            !58 = !DILocation(line: 13, column: 14, scope: !13)

            
            !59 = distinct !DISubprogram(name: "rand", linkageName: "rand", scope: !1, file: !1, line: 90, type: !5, isLocal: false, isDefinition: true, scopeLine: 90, flags: DIFlagPrototyped, isOptimized: true, unit: !0)
	; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/remarks.prof -S -pass-remarks=sample-profile -pass-remarks-output=%t.opt.yaml 2>&1 \| FileCheck %s
	; RUN: FileCheck %s -check-prefixes=YAML,YAML-NO-ANNOTATE < %t.opt.yaml

	; RUN: opt < %s -passes=sample-profile -annotate-sample-profile-inline-phase -sample-profile-file=%S/Inputs/remarks.prof -S -pass-remarks=sample-profile -pass-remarks-output=%t.opt.yaml 2>&1 \| FileCheck %s
	; RUN: FileCheck %s -check-prefixes=YAML,YAML-ANNOTATE < %t.opt.yaml

	; Original test case.
	;
	; 1 #include <stdlib.h>
	; 2
	; 3 long long foo() {
	; 4 long long int sum = 0;
	; 5 for (int i = 0; i < 500000000; i++)
	; 6 if (i < 1000)
	; 7 sum -= i;
	; 8 else
	; 9 sum += -i * rand();
	; 10 return sum;
	; 11 }
	; 12
	; 13 int main() { return foo() > 0; }

	; We are expecting foo() to be inlined in main() (almost all the cycles are
	; spent inside foo).
	; CHECK: remark: remarks.cc:13:21: '_Z3foov' inlined into 'main' to match profiling context with (cost=130, threshold=3000) at callsite main:0:21;
	; CHECK: remark: remarks.cc:9:19: 'rand' inlined into 'main' to match profiling context with (cost=always): always inline attribute at callsite _Z3foov:6:19 @ main:0:21;

	; The back edge for the loop is the hottest edge in the loop subgraph.
	; CHECK: remark: remarks.cc:6:9: most popular destination for conditional branches at remarks.cc:5:3

	; The predicate almost always chooses the 'else' branch.
	; CHECK: remark: remarks.cc:9:15: most popular destination for conditional branches at remarks.cc:6:9

	; Checking to see if YAML file is generated and contains remarks
	;YAML: --- !Passed
	;YAML-NO-ANNOTATE-NEXT: Pass: sample-profile-inline
	;YAML-ANNOTATE-NEXT: Pass: main-sample-profile-inline
	;YAML-NEXT: Name: Inlined
	;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 13, Column: 21 }
	;YAML-NEXT: Function: main
	;YAML-NEXT: Args:
	;YAML-NEXT: - String: ''''
	;YAML-NEXT: - Callee: _Z3foov
	;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 3, Column: 0 }
	;YAML-NEXT: - String: ''' inlined into '
	;YAML-NEXT: - Caller: main
	;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 13, Column: 0 }
	;YAML-NEXT: - String: ''''
	;YAML-NEXT: - String: ' to match profiling context'
	;YAML-NEXT: - String: ' with '
	;YAML-NEXT: - String: '(cost='
	;YAML-NEXT: - Cost: '130'
	;YAML-NEXT: - String: ', threshold='
	;YAML-NEXT: - Threshold: '3000'
	;YAML-NEXT: - String: ')'
	;YAML-NEXT: - String: ' at callsite '
	;YAML-NEXT: - String: main
	;YAML-NEXT: - String: ':'
	;YAML-NEXT: - Line: '0'
	;YAML-NEXT: - String: ':'
	;YAML-NEXT: - Column: '21'
	;YAML-NEXT: - String: ';'
	;YAML-NEXT: ...
	;YAML: --- !Passed
	;YAML-NO-ANNOTATE-NEXT: Pass: sample-profile-inline
	;YAML-ANNOTATE-NEXT: Pass: main-sample-profile-inline
	;YAML-NEXT: Name: AlwaysInline
	;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 9, Column: 19 }
	;YAML-NEXT: Function: main
	;YAML-NEXT: Args:
	;YAML-NEXT: - String: ''''
	;YAML-NEXT: - Callee: rand
	;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 90, Column: 0 }
	;YAML-NEXT: - String: ''' inlined into '''
	;YAML-NEXT: - Caller: main
	;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 13, Column: 0 }
	;YAML-NEXT: - String: ''''
	;YAML-NEXT: - String: ' to match profiling context'
	;YAML-NEXT: - String: ' with '
	;YAML-NEXT: - String: '(cost=always)'
	;YAML-NEXT: - String: ': '
	;YAML-NEXT: - Reason: always inline attribute
	;YAML-NEXT: - String: ' at callsite '
	;YAML-NEXT: - String: _Z3foov
	;YAML-NEXT: - String: ':'
	;YAML-NEXT: - Line: '6'
	;YAML-NEXT: - String: ':'
	;YAML-NEXT: - Column: '19'
	;YAML-NEXT: - String: ' @ '
	;YAML-NEXT: - String: main
	;YAML-NEXT: - String: ':'
	;YAML-NEXT: - Line: '0'
	;YAML-NEXT: - String: ':'
	;YAML-NEXT: - Column: '21'
	;YAML-NEXT: - String: ';'
	;YAML: --- !Analysis
	;YAML-NEXT: Pass: sample-profile
	;YAML-NEXT: Name: AppliedSamples
	;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 5, Column: 12 }
	;YAML-NEXT: Function: main
	;YAML-NEXT: Args:
	;YAML-NEXT: - String: 'Applied '
	;YAML-NEXT: - NumSamples: '18305'
	;YAML-NEXT: - String: ' samples from profile (offset: '
	;YAML-NEXT: - LineOffset: '2'
	;YAML-NEXT: - String: ')'
	;YAML-NEXT: ...
	;YAML: --- !Passed
	;YAML-NEXT: Pass: sample-profile
	;YAML-NEXT: Name: PopularDest
	;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 6, Column: 9 }
	;YAML-NEXT: Function: main
	;YAML-NEXT: Args:
	;YAML-NEXT: - String: 'most popular destination for conditional branches at '
	;YAML-NEXT: - CondBranchesLoc: 'remarks.cc:5:3'
	;YAML-NEXT: DebugLoc: { File: remarks.cc, Line: 5, Column: 3 }
	;YAML-NEXT: ...

	; Function Attrs: nounwind uwtable
	define i64 @_Z3foov() #0 !dbg !4 {
	entry:
	%sum = alloca i64, align 8
	%i = alloca i32, align 4
	call void @llvm.lifetime.start.p0(ptr %sum) #4, !dbg !19
	call void @llvm.dbg.declare(metadata ptr %sum, metadata !9, metadata !20), !dbg !21
	store i64 0, ptr %sum, align 8, !dbg !21, !tbaa !22
	call void @llvm.lifetime.start.p0(ptr %i) #4, !dbg !26
	call void @llvm.dbg.declare(metadata ptr %i, metadata !10, metadata !20), !dbg !27
	store i32 0, ptr %i, align 4, !dbg !27, !tbaa !28
	br label %for.cond, !dbg !26

	for.cond: ; preds = %for.inc, %entry
	%0 = load i32, ptr %i, align 4, !dbg !30, !tbaa !28
	%cmp = icmp slt i32 %0, 500000000, !dbg !34
	br i1 %cmp, label %for.body, label %for.cond.cleanup, !dbg !35

	for.cond.cleanup: ; preds = %for.cond
	call void @llvm.lifetime.end.p0(ptr %i) #4, !dbg !36
	br label %for.end

	for.body: ; preds = %for.cond
	%1 = load i32, ptr %i, align 4, !dbg !38, !tbaa !28
	%cmp1 = icmp slt i32 %1, 1000, !dbg !40
	br i1 %cmp1, label %if.then, label %if.else, !dbg !41

	if.then: ; preds = %for.body
	%2 = load i32, ptr %i, align 4, !dbg !42, !tbaa !28
	%conv = sext i32 %2 to i64, !dbg !42
	%3 = load i64, ptr %sum, align 8, !dbg !43, !tbaa !22
	%sub = sub nsw i64 %3, %conv, !dbg !43
	store i64 %sub, ptr %sum, align 8, !dbg !43, !tbaa !22
	br label %if.end, !dbg !44

	if.else: ; preds = %for.body
	%4 = load i32, ptr %i, align 4, !dbg !45, !tbaa !28
	%sub2 = sub nsw i32 0, %4, !dbg !46
	%call = call i32 @rand() #4, !dbg !47
	%mul = mul nsw i32 %sub2, %call, !dbg !48
	%conv3 = sext i32 %mul to i64, !dbg !46
	%5 = load i64, ptr %sum, align 8, !dbg !49, !tbaa !22
	%add = add nsw i64 %5, %conv3, !dbg !49
	store i64 %add, ptr %sum, align 8, !dbg !49, !tbaa !22
	br label %if.end

	if.end: ; preds = %if.else, %if.then
	br label %for.inc, !dbg !50

	for.inc: ; preds = %if.end
	%6 = load i32, ptr %i, align 4, !dbg !51, !tbaa !28
	%inc = add nsw i32 %6, 1, !dbg !51
	store i32 %inc, ptr %i, align 4, !dbg !51, !tbaa !28
	br label %for.cond, !dbg !52

	for.end: ; preds = %for.cond.cleanup
	%7 = load i64, ptr %sum, align 8, !dbg !53, !tbaa !22
	call void @llvm.lifetime.end.p0(ptr %sum) #4, !dbg !54
	ret i64 %7, !dbg !55
	}

	; Function Attrs: nounwind argmemonly
	declare void @llvm.lifetime.start.p0(ptr nocapture) #1

	; Function Attrs: nounwind readnone
	declare void @llvm.dbg.declare(metadata, metadata, metadata) #2

	; Function Attrs: nounwind
	define i32 @rand() #3 !dbg !59 {
	ret i32 1
	}

	; Function Attrs: nounwind argmemonly
	declare void @llvm.lifetime.end.p0(ptr nocapture) #1

	; Function Attrs: nounwind uwtable
	define i32 @main() #0 !dbg !13 {
	entry:
	%retval = alloca i32, align 4
	store i32 0, ptr %retval, align 4
	%call = call i64 @_Z3foov(), !dbg !56
	%cmp = icmp sgt i64 %call, 0, !dbg !57
	%conv = zext i1 %cmp to i32, !dbg !56
	ret i32 %conv, !dbg !58
	}

	attributes #0 = { nounwind uwtable "use-sample-profile" }
	attributes #1 = { nounwind argmemonly }
	attributes #2 = { nounwind readnone }
	attributes #3 = { nounwind alwaysinline }
	attributes #4 = { nounwind }

	!llvm.dbg.cu = !{!0}
	!llvm.module.flags = !{!16, !17}
	!llvm.ident = !{!18}

	!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 251041) (llvm/trunk 251053)", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
	!1 = !DIFile(filename: "remarks.cc", directory: ".")
	!2 = !{}
	!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)
	!5 = !DISubroutineType(types: !6)
	!6 = !{!7}
	!7 = !DIBasicType(name: "long long int", size: 64, align: 64, encoding: DW_ATE_signed)
	!8 = !{!9, !10}
	!9 = !DILocalVariable(name: "sum", scope: !4, file: !1, line: 4, type: !7)
	!10 = !DILocalVariable(name: "i", scope: !11, file: !1, line: 5, type: !12)
	!11 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 3)
	!12 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
	!13 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 13, type: !14, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
	!14 = !DISubroutineType(types: !15)
	!15 = !{!12}
	!16 = !{i32 2, !"Dwarf Version", i32 4}
	!17 = !{i32 2, !"Debug Info Version", i32 3}
	!18 = !{!"clang version 3.8.0 (trunk 251041) (llvm/trunk 251053)"}
	!19 = !DILocation(line: 4, column: 3, scope: !4)
	!20 = !DIExpression()
	!21 = !DILocation(line: 4, column: 17, scope: !4)
	!22 = !{!23, !23, i64 0}
	!23 = !{!"long long", !24, i64 0}
	!24 = !{!"omnipotent char", !25, i64 0}
	!25 = !{!"Simple C/C++ TBAA"}
	!26 = !DILocation(line: 5, column: 8, scope: !11)
	!27 = !DILocation(line: 5, column: 12, scope: !11)
	!28 = !{!29, !29, i64 0}
	!29 = !{!"int", !24, i64 0}
	!30 = !DILocation(line: 5, column: 19, scope: !31)
	!31 = !DILexicalBlockFile(scope: !32, file: !1, discriminator: 3)
	!32 = !DILexicalBlockFile(scope: !33, file: !1, discriminator: 1)
	!33 = distinct !DILexicalBlock(scope: !11, file: !1, line: 5, column: 3)
	!34 = !DILocation(line: 5, column: 21, scope: !33)
	!35 = !DILocation(line: 5, column: 3, scope: !11)
	!36 = !DILocation(line: 5, column: 3, scope: !37)
	!37 = !DILexicalBlockFile(scope: !33, file: !1, discriminator: 2)
	!38 = !DILocation(line: 6, column: 9, scope: !39)
	!39 = distinct !DILexicalBlock(scope: !33, file: !1, line: 6, column: 9)
	!40 = !DILocation(line: 6, column: 11, scope: !39)
	!41 = !DILocation(line: 6, column: 9, scope: !33)
	!42 = !DILocation(line: 7, column: 14, scope: !39)
	!43 = !DILocation(line: 7, column: 11, scope: !39)
	!44 = !DILocation(line: 7, column: 7, scope: !39)
	!45 = !DILocation(line: 9, column: 15, scope: !39)
	!46 = !DILocation(line: 9, column: 14, scope: !39)
	!47 = !DILocation(line: 9, column: 19, scope: !39)
	!48 = !DILocation(line: 9, column: 17, scope: !39)
	!49 = !DILocation(line: 9, column: 11, scope: !39)
	!50 = !DILocation(line: 6, column: 13, scope: !39)
	!51 = !DILocation(line: 5, column: 35, scope: !33)
	!52 = !DILocation(line: 5, column: 3, scope: !33)
	!53 = !DILocation(line: 10, column: 10, scope: !4)
	!54 = !DILocation(line: 11, column: 1, scope: !4)
	!55 = !DILocation(line: 10, column: 3, scope: !4)
	!56 = !DILocation(line: 13, column: 21, scope: !13)
	!57 = !DILocation(line: 13, column: 27, scope: !13)
	!58 = !DILocation(line: 13, column: 14, scope: !13)
	!59 = distinct !DISubprogram(name: "rand", linkageName: "rand", scope: !1, file: !1, line: 90, type: !5, isLocal: false, isDefinition: true, scopeLine: 90, flags: DIFlagPrototyped, isOptimized: true, unit: !0)