1 files changed, 84 insertions, 0 deletions
diff --git a/test/Analysis/BranchProbabilityInfo/pr22718.ll b/test/Analysis/BranchProbabilityInfo/pr22718.ll
new file mode 100644
index 000000000000..0de4d643c9c9
--- /dev/null
+++ b/test/Analysis/BranchProbabilityInfo/pr22718.ll
@@ -0,0 +1,84 @@
+; RUN: opt < %s -analyze -branch-prob | 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 216661881 / 2166666667 = 9.9
+; CHECK: edge for.body -> if.else probability is 1950004786 / 2166666667 = 90.0
+
+@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}