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1; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s2 3; In this test, the else clause is taken about 90% of the time. This was not4; reflected in the probability computation because the weight is larger than5; the branch weight cap (about 2 billion).6;7; CHECK: edge %for.body -> %if.then probability is 0x0cccba45 / 0x80000000 = 10.00%8; CHECK: edge %for.body -> %if.else probability is 0x733345bb / 0x80000000 = 90.00% [HOT edge]9 10@y = common global i64 0, align 811@x = common global i64 0, align 812@.str = private unnamed_addr constant [17 x i8] c"x = %lu\0Ay = %lu\0A\00", align 113 14; Function Attrs: inlinehint nounwind uwtable15define i32 @main() {16entry:17 %retval = alloca i32, align 418 %i = alloca i64, align 819 store i32 0, ptr %retval20 store i64 0, ptr @y, align 821 store i64 0, ptr @x, align 822 call void @srand(i32 422304)23 store i64 0, ptr %i, align 824 br label %for.cond25 26for.cond: ; preds = %for.inc, %entry27 %0 = load i64, ptr %i, align 828 %cmp = icmp ult i64 %0, 1300000000029 br i1 %cmp, label %for.body, label %for.end, !prof !130 31for.body: ; preds = %for.cond32 %call = call i32 @rand()33 %conv = sitofp i32 %call to double34 %mul = fmul double %conv, 1.000000e+0235 %div = fdiv double %mul, 0x41E000000000000036 %cmp1 = fcmp ogt double %div, 9.000000e+0137 br i1 %cmp1, label %if.then, label %if.else, !prof !238 39if.then: ; preds = %for.body40 %1 = load i64, ptr @x, align 841 %inc = add i64 %1, 142 store i64 %inc, ptr @x, align 843 br label %if.end44 45if.else: ; preds = %for.body46 %2 = load i64, ptr @y, align 847 %inc3 = add i64 %2, 148 store i64 %inc3, ptr @y, align 849 br label %if.end50 51if.end: ; preds = %if.else, %if.then52 br label %for.inc53 54for.inc: ; preds = %if.end55 %3 = load i64, ptr %i, align 856 %inc4 = add i64 %3, 157 store i64 %inc4, ptr %i, align 858 br label %for.cond59 60for.end: ; preds = %for.cond61 %4 = load i64, ptr @x, align 862 %5 = load i64, ptr @y, align 863 %call5 = call i32 (ptr, ...) @printf(ptr @.str, i64 %4, i64 %5)64 ret i32 065}66 67; Function Attrs: nounwind68declare void @srand(i32)69 70; Function Attrs: nounwind71declare i32 @rand()72 73declare i32 @printf(ptr, ...)74 75!llvm.ident = !{!0}76 77!0 = !{!"clang version 3.7.0 (trunk 236218) (llvm/trunk 236235)"}78!1 = !{!"branch_weights", i32 -1044967295, i32 1}79!2 = !{!"branch_weights", i32 433323762, i32 -394957723}80