diff --git a/clang/test/CodeGen/mcount-aix.c b/clang/test/CodeGen/mcount-aix.c
new file mode 100644
--- /dev/null
+++ b/clang/test/CodeGen/mcount-aix.c
@@ -0,0 +1,25 @@
+// RUN: %clang_cc1 -pg -triple powerpc-ibm-aix7.2.0.0 -S -emit-llvm %s -o - | FileCheck %s
+// RUN: %clang_cc1 -pg -triple powerpc64-ibm-aix7.2.0.0 -S -emit-llvm %s -o - | FileCheck %s -check-prefix=CHECK64
+
+void foo() {
+}
+
+void bar() {
+    foo();
+}
+// CHECK: @[[GLOB0:[0-9]+]] = internal global i32 0
+// CHECK: @[[GLOB1:[0-9]+]] = internal global i32 0
+// CHECK64: @[[GLOB0:[0-9]+]] = internal global i64 0
+// CHECK64: @[[GLOB1:[0-9]+]] = internal global i64 0
+// CHECK-LABEL: @foo(
+// CHECK-NEXT:  entry:
+// CHECK-NEXT:    call void @__mcount(ptr @[[GLOB0]])
+// CHECK64-LABEL: @foo(
+// CHECK64-NEXT:  entry:
+// CHECK64-NEXT:    call void @__mcount(ptr @[[GLOB0]])
+// CHECK-LABEL: @bar(
+// CHECK-NEXT:  entry:
+// CHECK-NEXT:    call void @__mcount(ptr @[[GLOB1]])
+// CHECK64-LABEL: @bar(
+// CHECK64-NEXT:  entry:
+// CHECK64-NEXT:    call void @__mcount(ptr @[[GLOB1]])
diff --git a/llvm/lib/Transforms/Utils/EntryExitInstrumenter.cpp b/llvm/lib/Transforms/Utils/EntryExitInstrumenter.cpp
--- a/llvm/lib/Transforms/Utils/EntryExitInstrumenter.cpp
+++ b/llvm/lib/Transforms/Utils/EntryExitInstrumenter.cpp
@@ -34,9 +34,25 @@
       Func == "__mcount" ||
       Func == "_mcount" ||
       Func == "__cyg_profile_func_enter_bare") {
-    FunctionCallee Fn = M.getOrInsertFunction(Func, Type::getVoidTy(C));
-    CallInst *Call = CallInst::Create(Fn, "", InsertionPt);
-    Call->setDebugLoc(DL);
+    const std::string &targetTriple = M.getTargetTriple();
+    if (targetTriple.find("powerpc-ibm-aix") == std::string::npos ||
+        targetTriple.find("powerpc64-ibm-aix") == std::string::npos) {
+      Type *SizeTy = M.getDataLayout().getIntPtrType(C);
+      Type *SizePtrTy = SizeTy->getPointerTo();
+      GlobalVariable *GV = new GlobalVariable(M, SizeTy, /*isConstant=*/false,
+                                              GlobalValue::InternalLinkage,
+                                              ConstantInt::get(SizeTy, 0));
+      CallInst *Call = CallInst::Create(
+          M.getOrInsertFunction(Func,
+                                FunctionType::get(Type::getVoidTy(C), {SizePtrTy},
+                                                  /*isVarArg=*/false)),
+          {GV}, "", InsertionPt);
+      Call->setDebugLoc(DL);
+    } else {
+      FunctionCallee Fn = M.getOrInsertFunction(Func, Type::getVoidTy(C));
+      CallInst *Call = CallInst::Create(Fn, "", InsertionPt);
+      Call->setDebugLoc(DL);
+    }
     return;
   }