; RUN: opt < %s -analyze -branch-prob | FileCheck %s ; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s ; In this test, the else clause is taken about 90% of the time. This was not ; reflected in the probability computation because the weight is larger than ; the branch weight cap (about 2 billion). ; ; CHECK: edge for.body -> if.then probability is 0x0cccba45 / 0x80000000 = 10.00% ; CHECK: edge for.body -> if.else probability is 0x733345bb / 0x80000000 = 90.00% [HOT edge] @y = common global i64 0, align 8 @x = common global i64 0, align 8 @.str = private unnamed_addr constant [17 x i8] c"x = %lu\0Ay = %lu\0A\00", align 1 ; Function Attrs: inlinehint nounwind uwtable define i32 @main() #0 { entry: %retval = alloca i32, align 4 %i = alloca i64, align 8 store i32 0, i32* %retval store i64 0, i64* @y, align 8 store i64 0, i64* @x, align 8 call void @srand(i32 422304) #3 store i64 0, i64* %i, align 8 br label %for.cond for.cond: ; preds = %for.inc, %entry %0 = load i64, i64* %i, align 8 %cmp = icmp ult i64 %0, 13000000000 br i1 %cmp, label %for.body, label %for.end, !prof !1 for.body: ; preds = %for.cond %call = call i32 @rand() #3 %conv = sitofp i32 %call to double %mul = fmul double %conv, 1.000000e+02 %div = fdiv double %mul, 0x41E0000000000000 %cmp1 = fcmp ogt double %div, 9.000000e+01 br i1 %cmp1, label %if.then, label %if.else, !prof !2 if.then: ; preds = %for.body %1 = load i64, i64* @x, align 8 %inc = add i64 %1, 1 store i64 %inc, i64* @x, align 8 br label %if.end if.else: ; preds = %for.body %2 = load i64, i64* @y, align 8 %inc3 = add i64 %2, 1 store i64 %inc3, i64* @y, align 8 br label %if.end if.end: ; preds = %if.else, %if.then br label %for.inc for.inc: ; preds = %if.end %3 = load i64, i64* %i, align 8 %inc4 = add i64 %3, 1 store i64 %inc4, i64* %i, align 8 br label %for.cond for.end: ; preds = %for.cond %4 = load i64, i64* @x, align 8 %5 = load i64, i64* @y, align 8 %call5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i32 0, i32 0), i64 %4, i64 %5) ret i32 0 } ; Function Attrs: nounwind declare void @srand(i32) #1 ; Function Attrs: nounwind declare i32 @rand() #1 declare i32 @printf(i8*, ...) #2 attributes #0 = { inlinehint 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" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" } attributes #1 = { nounwind "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" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "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" "target-cpu"="x86-64" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" } attributes #3 = { nounwind } !llvm.ident = !{!0} !0 = !{!"clang version 3.7.0 (trunk 236218) (llvm/trunk 236235)"} !1 = !{!"branch_weights", i32 -1044967295, i32 1} !2 = !{!"branch_weights", i32 433323762, i32 -394957723}