diff --git a/llvm/lib/Analysis/InlineCost.cpp b/llvm/lib/Analysis/InlineCost.cpp
--- a/llvm/lib/Analysis/InlineCost.cpp
+++ b/llvm/lib/Analysis/InlineCost.cpp
@@ -68,7 +68,7 @@
 
 static cl::opt<int>
     ColdCallSiteThreshold("inline-cold-callsite-threshold", cl::Hidden,
-                          cl::init(45), cl::ZeroOrMore,
+                          cl::init(55), cl::ZeroOrMore,
                           cl::desc("Threshold for inlining cold callsites"));
 
 static cl::opt<bool> InlineEnableCostBenefitAnalysis(
@@ -89,7 +89,7 @@
 // PGO before we actually hook up inliner with analysis passes such as BPI and
 // BFI.
 static cl::opt<int> ColdThreshold(
-    "inlinecold-threshold", cl::Hidden, cl::init(45), cl::ZeroOrMore,
+    "inlinecold-threshold", cl::Hidden, cl::init(55), cl::ZeroOrMore,
     cl::desc("Threshold for inlining functions with cold attribute"));
 
 static cl::opt<int>
diff --git a/llvm/test/Transforms/Inline/X86/inline-cold-callsite.ll b/llvm/test/Transforms/Inline/X86/inline-cold-callsite.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/Transforms/Inline/X86/inline-cold-callsite.ll
@@ -0,0 +1,37 @@
+; RUN: opt < %s -inline -debug-only=inline-cost -print-instruction-comments -S -mtriple=x86_64-unknown-linux-gnu 2>&1 | FileCheck %s
+; RUN: opt < %s -passes='cgscc(inline)' -debug-only=inline-cost -print-instruction-comments -S -mtriple=x86_64-unknown-linux-gnu 2>&1 | FileCheck %s
+
+; REQUIRES: asserts
+
+; Check the threshold for inlining cold callsites.
+
+; CHECK: Analyzing call of cold_callee... (caller:caller)
+; CHECK-NEXT: Cold callsite
+; CHECK-NEXT: define void @cold_callee() {
+; CHECK-NEXT: ; cost before = -30, cost after = -30, threshold before = 51, threshold after = 51, cost delta = 0
+; CHECK-NEXT:   ret void
+; CHECK-NEXT: }
+
+declare void @hot_callee()
+
+define void @cold_callee() {
+  ret void
+}
+
+define void @caller(i1 %c) {
+entry:
+  br i1 %c, label %hot, label %cold, !prof !0
+
+hot:
+  call void @hot_callee()
+  br label %end
+
+cold:
+  call void @cold_callee()
+  br label %end
+
+end:
+  ret void
+}
+
+!0 = !{!"branch_weights", i32 1000000, i32 1}