forked from OSchip/llvm-project
244 lines
11 KiB
LLVM
244 lines
11 KiB
LLVM
; RUN: opt < %s -sample-profile -sample-profile-file=%S/Inputs/propagate.prof | opt -analyze -branch-prob | FileCheck %s
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; Original C++ code for this test case:
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;
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; #include <stdio.h>
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;
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; long foo(int x, int y, long N) {
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; if (x < y) {
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; return y - x;
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; } else {
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; for (long i = 0; i < N; i++) {
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; if (i > N / 3)
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; x--;
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; if (i > N / 4) {
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; y++;
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; x += 3;
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; } else {
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; for (unsigned j = 0; j < i; j++) {
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; x += j;
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; y -= 3;
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; }
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; }
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; }
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; }
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; return y * x;
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; }
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;
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; int main() {
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; int x = 5678;
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; int y = 1234;
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; long N = 999999;
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; printf("foo(%d, %d, %ld) = %ld\n", x, y, N, foo(x, y, N));
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; return 0;
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; }
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; ModuleID = 'propagate.cc'
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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"
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target triple = "x86_64-unknown-linux-gnu"
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@.str = private unnamed_addr constant [24 x i8] c"foo(%d, %d, %ld) = %ld\0A\00", align 1
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; Function Attrs: nounwind uwtable
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define i64 @_Z3fooiil(i32 %x, i32 %y, i64 %N) #0 {
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entry:
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%retval = alloca i64, align 8
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%x.addr = alloca i32, align 4
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%y.addr = alloca i32, align 4
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%N.addr = alloca i64, align 8
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%i = alloca i64, align 8
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%j = alloca i32, align 4
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store i32 %x, i32* %x.addr, align 4
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store i32 %y, i32* %y.addr, align 4
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store i64 %N, i64* %N.addr, align 8
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%0 = load i32* %x.addr, align 4, !dbg !11
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%1 = load i32* %y.addr, align 4, !dbg !11
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%cmp = icmp slt i32 %0, %1, !dbg !11
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br i1 %cmp, label %if.then, label %if.else, !dbg !11
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if.then: ; preds = %entry
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%2 = load i32* %y.addr, align 4, !dbg !13
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%3 = load i32* %x.addr, align 4, !dbg !13
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%sub = sub nsw i32 %2, %3, !dbg !13
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%conv = sext i32 %sub to i64, !dbg !13
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store i64 %conv, i64* %retval, !dbg !13
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br label %return, !dbg !13
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if.else: ; preds = %entry
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store i64 0, i64* %i, align 8, !dbg !15
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br label %for.cond, !dbg !15
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for.cond: ; preds = %for.inc16, %if.else
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%4 = load i64* %i, align 8, !dbg !15
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%5 = load i64* %N.addr, align 8, !dbg !15
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%cmp1 = icmp slt i64 %4, %5, !dbg !15
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br i1 %cmp1, label %for.body, label %for.end18, !dbg !15
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; CHECK: edge for.cond -> for.body probability is 10 / 11 = 90.9091% [HOT edge]
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; CHECK: edge for.cond -> for.end18 probability is 1 / 11 = 9.09091%
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for.body: ; preds = %for.cond
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%6 = load i64* %i, align 8, !dbg !18
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%7 = load i64* %N.addr, align 8, !dbg !18
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%div = sdiv i64 %7, 3, !dbg !18
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%cmp2 = icmp sgt i64 %6, %div, !dbg !18
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br i1 %cmp2, label %if.then3, label %if.end, !dbg !18
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; CHECK: edge for.body -> if.then3 probability is 1 / 5 = 20%
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; CHECK: edge for.body -> if.end probability is 4 / 5 = 80%
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if.then3: ; preds = %for.body
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%8 = load i32* %x.addr, align 4, !dbg !21
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%dec = add nsw i32 %8, -1, !dbg !21
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store i32 %dec, i32* %x.addr, align 4, !dbg !21
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br label %if.end, !dbg !21
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if.end: ; preds = %if.then3, %for.body
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%9 = load i64* %i, align 8, !dbg !22
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%10 = load i64* %N.addr, align 8, !dbg !22
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%div4 = sdiv i64 %10, 4, !dbg !22
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%cmp5 = icmp sgt i64 %9, %div4, !dbg !22
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br i1 %cmp5, label %if.then6, label %if.else7, !dbg !22
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; CHECK: edge if.end -> if.then6 probability is 3 / 6342 = 0.0473037%
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; CHECK: edge if.end -> if.else7 probability is 6339 / 6342 = 99.9527% [HOT edge]
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if.then6: ; preds = %if.end
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%11 = load i32* %y.addr, align 4, !dbg !24
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%inc = add nsw i32 %11, 1, !dbg !24
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store i32 %inc, i32* %y.addr, align 4, !dbg !24
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%12 = load i32* %x.addr, align 4, !dbg !26
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%add = add nsw i32 %12, 3, !dbg !26
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store i32 %add, i32* %x.addr, align 4, !dbg !26
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br label %if.end15, !dbg !27
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if.else7: ; preds = %if.end
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store i32 0, i32* %j, align 4, !dbg !28
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br label %for.cond8, !dbg !28
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for.cond8: ; preds = %for.inc, %if.else7
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%13 = load i32* %j, align 4, !dbg !28
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%conv9 = zext i32 %13 to i64, !dbg !28
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%14 = load i64* %i, align 8, !dbg !28
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%cmp10 = icmp slt i64 %conv9, %14, !dbg !28
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br i1 %cmp10, label %for.body11, label %for.end, !dbg !28
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; CHECK: edge for.cond8 -> for.body11 probability is 16191 / 16192 = 99.9938% [HOT edge]
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; CHECK: edge for.cond8 -> for.end probability is 1 / 16192 = 0.00617589%
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for.body11: ; preds = %for.cond8
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%15 = load i32* %j, align 4, !dbg !31
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%16 = load i32* %x.addr, align 4, !dbg !31
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%add12 = add i32 %16, %15, !dbg !31
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store i32 %add12, i32* %x.addr, align 4, !dbg !31
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%17 = load i32* %y.addr, align 4, !dbg !33
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%sub13 = sub nsw i32 %17, 3, !dbg !33
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store i32 %sub13, i32* %y.addr, align 4, !dbg !33
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br label %for.inc, !dbg !34
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for.inc: ; preds = %for.body11
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%18 = load i32* %j, align 4, !dbg !28
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%inc14 = add i32 %18, 1, !dbg !28
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store i32 %inc14, i32* %j, align 4, !dbg !28
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br label %for.cond8, !dbg !28
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for.end: ; preds = %for.cond8
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br label %if.end15
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if.end15: ; preds = %for.end, %if.then6
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br label %for.inc16, !dbg !35
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for.inc16: ; preds = %if.end15
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%19 = load i64* %i, align 8, !dbg !15
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%inc17 = add nsw i64 %19, 1, !dbg !15
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store i64 %inc17, i64* %i, align 8, !dbg !15
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br label %for.cond, !dbg !15
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for.end18: ; preds = %for.cond
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br label %if.end19
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if.end19: ; preds = %for.end18
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%20 = load i32* %y.addr, align 4, !dbg !36
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%21 = load i32* %x.addr, align 4, !dbg !36
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%mul = mul nsw i32 %20, %21, !dbg !36
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%conv20 = sext i32 %mul to i64, !dbg !36
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store i64 %conv20, i64* %retval, !dbg !36
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br label %return, !dbg !36
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return: ; preds = %if.end19, %if.then
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%22 = load i64* %retval, !dbg !37
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ret i64 %22, !dbg !37
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}
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; Function Attrs: uwtable
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define i32 @main() #1 {
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entry:
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%retval = alloca i32, align 4
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%x = alloca i32, align 4
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%y = alloca i32, align 4
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%N = alloca i64, align 8
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store i32 0, i32* %retval
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store i32 5678, i32* %x, align 4, !dbg !38
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store i32 1234, i32* %y, align 4, !dbg !39
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store i64 999999, i64* %N, align 8, !dbg !40
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%0 = load i32* %x, align 4, !dbg !41
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%1 = load i32* %y, align 4, !dbg !41
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%2 = load i64* %N, align 8, !dbg !41
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%3 = load i32* %x, align 4, !dbg !41
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%4 = load i32* %y, align 4, !dbg !41
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%5 = load i64* %N, align 8, !dbg !41
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%call = call i64 @_Z3fooiil(i32 %3, i32 %4, i64 %5), !dbg !41
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%call1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([24 x i8]* @.str, i32 0, i32 0), i32 %0, i32 %1, i64 %2, i64 %call), !dbg !41
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ret i32 0, !dbg !42
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}
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declare i32 @printf(i8*, ...) #2
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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" }
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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" }
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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" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!8, !9}
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!llvm.ident = !{!10}
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!0 = metadata !{metadata !"0x11\004\00clang version 3.5 \000\00\000\00\000", metadata !1, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2} ; [ DW_TAG_compile_unit ] [propagate.cc] [DW_LANG_C_plus_plus]
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!1 = metadata !{metadata !"propagate.cc", metadata !"."}
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!2 = metadata !{i32 0}
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!3 = metadata !{metadata !4, metadata !7}
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!4 = metadata !{metadata !"0x2e\00foo\00foo\00\003\000\001\000\006\00256\000\003", metadata !1, metadata !5, metadata !6, null, i64 (i32, i32, i64)* @_Z3fooiil, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 3] [def] [foo]
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!5 = metadata !{metadata !"0x29", metadata !1} ; [ DW_TAG_file_type ] [propagate.cc]
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!6 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !2, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!7 = metadata !{metadata !"0x2e\00main\00main\00\0024\000\001\000\006\00256\000\0024", metadata !1, metadata !5, metadata !6, null, i32 ()* @main, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 24] [def] [main]
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!8 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
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!9 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}
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!10 = metadata !{metadata !"clang version 3.5 "}
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!11 = metadata !{i32 4, i32 0, metadata !12, null}
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!12 = metadata !{metadata !"0xb\004\000\000", metadata !1, metadata !4} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!13 = metadata !{i32 5, i32 0, metadata !14, null}
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!14 = metadata !{metadata !"0xb\004\000\000", metadata !1, metadata !12} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!15 = metadata !{i32 7, i32 0, metadata !16, null}
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!16 = metadata !{metadata !"0xb\007\000\000", metadata !1, metadata !17} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!17 = metadata !{metadata !"0xb\006\000\000", metadata !1, metadata !12} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!18 = metadata !{i32 8, i32 0, metadata !19, null}
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!19 = metadata !{metadata !"0xb\008\000\000", metadata !1, metadata !20} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!20 = metadata !{metadata !"0xb\007\000\000", metadata !1, metadata !16} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!21 = metadata !{i32 9, i32 0, metadata !19, null}
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!22 = metadata !{i32 10, i32 0, metadata !23, null}
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!23 = metadata !{metadata !"0xb\0010\000\000", metadata !1, metadata !20} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!24 = metadata !{i32 11, i32 0, metadata !25, null}
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!25 = metadata !{metadata !"0xb\0010\000\000", metadata !1, metadata !23} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!26 = metadata !{i32 12, i32 0, metadata !25, null}
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!27 = metadata !{i32 13, i32 0, metadata !25, null}
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!28 = metadata !{i32 14, i32 0, metadata !29, null}
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!29 = metadata !{metadata !"0xb\0014\000\000", metadata !1, metadata !30} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!30 = metadata !{metadata !"0xb\0013\000\000", metadata !1, metadata !23} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!31 = metadata !{i32 15, i32 0, metadata !32, null}
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!32 = metadata !{metadata !"0xb\0014\000\000", metadata !1, metadata !29} ; [ DW_TAG_lexical_block ] [propagate.cc]
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!33 = metadata !{i32 16, i32 0, metadata !32, null}
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!34 = metadata !{i32 17, i32 0, metadata !32, null}
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!35 = metadata !{i32 19, i32 0, metadata !20, null}
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!36 = metadata !{i32 21, i32 0, metadata !4, null}
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!37 = metadata !{i32 22, i32 0, metadata !4, null}
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!38 = metadata !{i32 25, i32 0, metadata !7, null}
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!39 = metadata !{i32 26, i32 0, metadata !7, null}
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!40 = metadata !{i32 27, i32 0, metadata !7, null}
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!41 = metadata !{i32 28, i32 0, metadata !7, null}
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!42 = metadata !{i32 29, i32 0, metadata !7, null}
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