| ; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/propagate.prof | opt -analyze -branch-prob | FileCheck %s |
| |
| ; Original C++ code for this test case: |
| ; |
| ; #include <stdio.h> |
| ; |
| ; long foo(int x, int y, long N) { |
| ; if (x < y) { |
| ; return y - x; |
| ; } else { |
| ; for (long i = 0; i < N; i++) { |
| ; if (i > N / 3) |
| ; x--; |
| ; if (i > N / 4) { |
| ; y++; |
| ; x += 3; |
| ; } else { |
| ; for (unsigned j = 0; j < i; j++) { |
| ; x += j; |
| ; y -= 3; |
| ; } |
| ; } |
| ; } |
| ; } |
| ; return y * x; |
| ; } |
| ; |
| ; int main() { |
| ; int x = 5678; |
| ; int y = 1234; |
| ; long N = 999999; |
| ; printf("foo(%d, %d, %ld) = %ld\n", x, y, N, foo(x, y, N)); |
| ; return 0; |
| ; } |
| |
| ; ModuleID = 'propagate.cc' |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @.str = private unnamed_addr constant [24 x i8] c"foo(%d, %d, %ld) = %ld\0A\00", align 1 |
| |
| ; Function Attrs: nounwind uwtable |
| define i64 @_Z3fooiil(i32 %x, i32 %y, i64 %N) #0 !dbg !4 { |
| entry: |
| %retval = alloca i64, align 8 |
| %x.addr = alloca i32, align 4 |
| %y.addr = alloca i32, align 4 |
| %N.addr = alloca i64, align 8 |
| %i = alloca i64, align 8 |
| %j = alloca i32, align 4 |
| store i32 %x, i32* %x.addr, align 4 |
| store i32 %y, i32* %y.addr, align 4 |
| store i64 %N, i64* %N.addr, align 8 |
| %0 = load i32, i32* %x.addr, align 4, !dbg !11 |
| %1 = load i32, i32* %y.addr, align 4, !dbg !11 |
| %cmp = icmp slt i32 %0, %1, !dbg !11 |
| br i1 %cmp, label %if.then, label %if.else, !dbg !11 |
| |
| if.then: ; preds = %entry |
| %2 = load i32, i32* %y.addr, align 4, !dbg !13 |
| %3 = load i32, i32* %x.addr, align 4, !dbg !13 |
| %sub = sub nsw i32 %2, %3, !dbg !13 |
| %conv = sext i32 %sub to i64, !dbg !13 |
| store i64 %conv, i64* %retval, !dbg !13 |
| br label %return, !dbg !13 |
| |
| if.else: ; preds = %entry |
| store i64 0, i64* %i, align 8, !dbg !15 |
| br label %for.cond, !dbg !15 |
| |
| for.cond: ; preds = %for.inc16, %if.else |
| %4 = load i64, i64* %i, align 8, !dbg !15 |
| %5 = load i64, i64* %N.addr, align 8, !dbg !15 |
| %cmp1 = icmp slt i64 %4, %5, !dbg !15 |
| br i1 %cmp1, label %for.body, label %for.end18, !dbg !15 |
| ; CHECK: edge for.cond -> for.body probability is 0x745d1746 / 0x80000000 = 90.91% [HOT edge] |
| ; CHECK: edge for.cond -> for.end18 probability is 0x0ba2e8ba / 0x80000000 = 9.09% |
| |
| for.body: ; preds = %for.cond |
| %6 = load i64, i64* %i, align 8, !dbg !18 |
| %7 = load i64, i64* %N.addr, align 8, !dbg !18 |
| %div = sdiv i64 %7, 3, !dbg !18 |
| %cmp2 = icmp sgt i64 %6, %div, !dbg !18 |
| br i1 %cmp2, label %if.then3, label %if.end, !dbg !18 |
| ; CHECK: edge for.body -> if.then3 probability is 0x1999999a / 0x80000000 = 20.00% |
| ; CHECK: edge for.body -> if.end probability is 0x66666666 / 0x80000000 = 80.00% |
| |
| if.then3: ; preds = %for.body |
| %8 = load i32, i32* %x.addr, align 4, !dbg !21 |
| %dec = add nsw i32 %8, -1, !dbg !21 |
| store i32 %dec, i32* %x.addr, align 4, !dbg !21 |
| br label %if.end, !dbg !21 |
| |
| if.end: ; preds = %if.then3, %for.body |
| %9 = load i64, i64* %i, align 8, !dbg !22 |
| %10 = load i64, i64* %N.addr, align 8, !dbg !22 |
| %div4 = sdiv i64 %10, 4, !dbg !22 |
| %cmp5 = icmp sgt i64 %9, %div4, !dbg !22 |
| br i1 %cmp5, label %if.then6, label %if.else7, !dbg !22 |
| ; CHECK: edge if.end -> if.then6 probability is 0x000f801f / 0x80000000 = 0.05% |
| ; CHECK: edge if.end -> if.else7 probability is 0x7ff07fe1 / 0x80000000 = 99.95% [HOT edge] |
| |
| if.then6: ; preds = %if.end |
| %11 = load i32, i32* %y.addr, align 4, !dbg !24 |
| %inc = add nsw i32 %11, 1, !dbg !24 |
| store i32 %inc, i32* %y.addr, align 4, !dbg !24 |
| %12 = load i32, i32* %x.addr, align 4, !dbg !26 |
| %add = add nsw i32 %12, 3, !dbg !26 |
| store i32 %add, i32* %x.addr, align 4, !dbg !26 |
| br label %if.end15, !dbg !27 |
| |
| if.else7: ; preds = %if.end |
| store i32 0, i32* %j, align 4, !dbg !28 |
| br label %for.cond8, !dbg !28 |
| |
| for.cond8: ; preds = %for.inc, %if.else7 |
| %13 = load i32, i32* %j, align 4, !dbg !28 |
| %conv9 = zext i32 %13 to i64, !dbg !28 |
| %14 = load i64, i64* %i, align 8, !dbg !28 |
| %cmp10 = icmp slt i64 %conv9, %14, !dbg !28 |
| br i1 %cmp10, label %for.body11, label %for.end, !dbg !28 |
| ; CHECK: edge for.cond8 -> for.body11 probability is 0x5bfc7472 / 0x80000000 = 71.86% |
| ; CHECK: edge for.cond8 -> for.end probability is 0x24038b8e / 0x80000000 = 28.14% |
| |
| for.body11: ; preds = %for.cond8 |
| %15 = load i32, i32* %j, align 4, !dbg !31 |
| %16 = load i32, i32* %x.addr, align 4, !dbg !31 |
| %add12 = add i32 %16, %15, !dbg !31 |
| store i32 %add12, i32* %x.addr, align 4, !dbg !31 |
| %17 = load i32, i32* %y.addr, align 4, !dbg !33 |
| %sub13 = sub nsw i32 %17, 3, !dbg !33 |
| store i32 %sub13, i32* %y.addr, align 4, !dbg !33 |
| br label %for.inc, !dbg !34 |
| |
| for.inc: ; preds = %for.body11 |
| %18 = load i32, i32* %j, align 4, !dbg !28 |
| %inc14 = add i32 %18, 1, !dbg !28 |
| store i32 %inc14, i32* %j, align 4, !dbg !28 |
| br label %for.cond8, !dbg !28 |
| |
| for.end: ; preds = %for.cond8 |
| br label %if.end15 |
| |
| if.end15: ; preds = %for.end, %if.then6 |
| br label %for.inc16, !dbg !35 |
| |
| for.inc16: ; preds = %if.end15 |
| %19 = load i64, i64* %i, align 8, !dbg !15 |
| %inc17 = add nsw i64 %19, 1, !dbg !15 |
| store i64 %inc17, i64* %i, align 8, !dbg !15 |
| br label %for.cond, !dbg !15 |
| |
| for.end18: ; preds = %for.cond |
| br label %if.end19 |
| |
| if.end19: ; preds = %for.end18 |
| %20 = load i32, i32* %y.addr, align 4, !dbg !36 |
| %21 = load i32, i32* %x.addr, align 4, !dbg !36 |
| %mul = mul nsw i32 %20, %21, !dbg !36 |
| %conv20 = sext i32 %mul to i64, !dbg !36 |
| store i64 %conv20, i64* %retval, !dbg !36 |
| br label %return, !dbg !36 |
| |
| return: ; preds = %if.end19, %if.then |
| %22 = load i64, i64* %retval, !dbg !37 |
| ret i64 %22, !dbg !37 |
| } |
| |
| ; Function Attrs: uwtable |
| define i32 @main() #1 !dbg !7 { |
| entry: |
| %retval = alloca i32, align 4 |
| %x = alloca i32, align 4 |
| %y = alloca i32, align 4 |
| %N = alloca i64, align 8 |
| store i32 0, i32* %retval |
| store i32 5678, i32* %x, align 4, !dbg !38 |
| store i32 1234, i32* %y, align 4, !dbg !39 |
| store i64 999999, i64* %N, align 8, !dbg !40 |
| %0 = load i32, i32* %x, align 4, !dbg !41 |
| %1 = load i32, i32* %y, align 4, !dbg !41 |
| %2 = load i64, i64* %N, align 8, !dbg !41 |
| %3 = load i32, i32* %x, align 4, !dbg !41 |
| %4 = load i32, i32* %y, align 4, !dbg !41 |
| %5 = load i64, i64* %N, align 8, !dbg !41 |
| %call = call i64 @_Z3fooiil(i32 %3, i32 %4, i64 %5), !dbg !41 |
| %call1 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i32 0, i32 0), i32 %0, i32 %1, i64 %2, i64 %call), !dbg !41 |
| ret i32 0, !dbg !42 |
| } |
| |
| declare i32 @printf(i8*, ...) #2 |
| |
| attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #1 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!8, !9} |
| !llvm.ident = !{!10} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5 ", isOptimized: false, emissionKind: 0, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) |
| !1 = !DIFile(filename: "propagate.cc", directory: ".") |
| !2 = !{} |
| !3 = !{!4, !7} |
| !4 = distinct !DISubprogram(name: "foo", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !1, scope: !5, type: !6, variables: !2) |
| !5 = !DIFile(filename: "propagate.cc", directory: ".") |
| !6 = !DISubroutineType(types: !{null}) |
| !7 = distinct !DISubprogram(name: "main", line: 24, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 24, file: !1, scope: !5, type: !6, variables: !2) |
| !8 = !{i32 2, !"Dwarf Version", i32 4} |
| !9 = !{i32 1, !"Debug Info Version", i32 3} |
| !10 = !{!"clang version 3.5 "} |
| !11 = !DILocation(line: 4, scope: !12) |
| !12 = distinct !DILexicalBlock(line: 4, column: 0, file: !1, scope: !4) |
| !13 = !DILocation(line: 5, scope: !14) |
| !14 = distinct !DILexicalBlock(line: 4, column: 0, file: !1, scope: !12) |
| !15 = !DILocation(line: 7, scope: !16) |
| !16 = distinct !DILexicalBlock(line: 7, column: 0, file: !1, scope: !17) |
| !17 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !12) |
| !18 = !DILocation(line: 8, scope: !19) |
| !19 = distinct !DILexicalBlock(line: 8, column: 0, file: !1, scope: !20) |
| !20 = distinct !DILexicalBlock(line: 7, column: 0, file: !1, scope: !16) |
| !21 = !DILocation(line: 9, scope: !19) |
| !22 = !DILocation(line: 10, scope: !23) |
| !23 = distinct !DILexicalBlock(line: 10, column: 0, file: !1, scope: !20) |
| !24 = !DILocation(line: 11, scope: !25) |
| !25 = distinct !DILexicalBlock(line: 10, column: 0, file: !1, scope: !23) |
| !26 = !DILocation(line: 12, scope: !25) |
| !27 = !DILocation(line: 13, scope: !25) |
| !28 = !DILocation(line: 14, scope: !29) |
| !29 = distinct !DILexicalBlock(line: 14, column: 0, file: !1, scope: !30) |
| !30 = distinct !DILexicalBlock(line: 13, column: 0, file: !1, scope: !23) |
| !31 = !DILocation(line: 15, scope: !32) |
| !32 = distinct !DILexicalBlock(line: 14, column: 0, file: !1, scope: !29) |
| !33 = !DILocation(line: 16, scope: !32) |
| !34 = !DILocation(line: 17, scope: !32) |
| !35 = !DILocation(line: 19, scope: !20) |
| !36 = !DILocation(line: 21, scope: !4) |
| !37 = !DILocation(line: 22, scope: !4) |
| !38 = !DILocation(line: 25, scope: !7) |
| !39 = !DILocation(line: 26, scope: !7) |
| !40 = !DILocation(line: 27, scope: !7) |
| !41 = !DILocation(line: 28, scope: !7) |
| !42 = !DILocation(line: 29, scope: !7) |