diff --git a/test/Transforms/PGOProfile/Inputs/branch1_large_count.proftext b/test/Transforms/PGOProfile/Inputs/branch1_large_count.proftext
new file mode 100644
index 00000000000..a5b1f8204e8
--- /dev/null
+++ b/test/Transforms/PGOProfile/Inputs/branch1_large_count.proftext
@@ -0,0 +1,8 @@
+# :ir is the flag to indicate this is IR level profile.
+:ir
+test_br_1
+25571299074
+2
+12884901888
+8589934592
+
diff --git a/test/Transforms/PGOProfile/branch1.ll b/test/Transforms/PGOProfile/branch1.ll
index b2c7bcc2c19..3db7566d507 100644
--- a/test/Transforms/PGOProfile/branch1.ll
+++ b/test/Transforms/PGOProfile/branch1.ll
@@ -8,8 +8,12 @@
 ; RUN: llvm-profdata merge %S/Inputs/branch1.proftext -o %t.profdata
 ; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE
 
+; RUN: llvm-profdata merge %S/Inputs/branch1_large_count.proftext -o %t.l.profdata
+; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.l.profdata -S | FileCheck %s --check-prefix=USE-LARGE
+
 ; New PM
 ; RUN: opt < %s -passes=pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE
+; RUN: opt < %s -passes=pgo-instr-use -pgo-test-profile-file=%t.l.profdata -S | FileCheck %s --check-prefix=USE-LARGE
 
 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
@@ -31,6 +35,9 @@ entry:
 ; USE: br i1 %cmp, label %if.then, label %if.end
 ; USE-SAME: !prof ![[BW_ENTRY:[0-9]+]]
 ; USE-DAG: ![[BW_ENTRY]] = !{!"branch_weights", i32 2, i32 1}
+; USE-LARGE: br i1 %cmp, label %if.then, label %if.end
+; USE-LARGE-SAME: !prof ![[BW_L_ENTRY:[0-9]+]]
+; USE-LARGE-DAG: ![[BW_L_ENTRY]] = !{!"branch_weights", i32 -1431655766, i32 1431655765}
 
 if.then:
 ; GEN: if.then: