diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -2232,7 +2232,10 @@
 
     // We can emit the pointer value into this slot if the slot is an
     // integer slot equal to the size of the pointer.
-    if (DL.getTypeAllocSize(Ty) == DL.getTypeAllocSize(Op->getType()))
+    //
+    // If the pointer is larger than the resultant integer, then
+    // as with Trunc just depend on the assembler to truncate it.
+    if (DL.getTypeAllocSize(Ty) <= DL.getTypeAllocSize(Op->getType()))
       return OpExpr;
 
     // Otherwise the pointer is smaller than the resultant integer, mask off
diff --git a/llvm/test/CodeGen/X86/ptrtoint-narrow.ll b/llvm/test/CodeGen/X86/ptrtoint-narrow.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/X86/ptrtoint-narrow.ll
@@ -0,0 +1,5 @@
+; RUN: llc < %s -mtriple=x86_64-- -filetype=obj
+
+%struct.MyStruct = type { i32 }
+@ptr = external global i8, align 1
+@ref = global %struct.MyStruct { i32 trunc (i64 ptrtoint (i8* @ptr to i64) to i32) }, align 8