diff --git a/llvm/lib/Target/X86/README-X86-64.txt b/llvm/lib/Target/X86/README-X86-64.txt
index 59cecdf4f2cc..efe3b73da5b1 100644
--- a/llvm/lib/Target/X86/README-X86-64.txt
+++ b/llvm/lib/Target/X86/README-X86-64.txt
@@ -243,8 +243,7 @@ compiles to this code:
 _a:
 	subq	$8, %rsp
 	cvttsd2siq	%xmm0, %rax
-	movl	$4294967295, %ecx
-	andq	%rcx, %rax
+	movl	%eax, %eax
 	cvtsi2sdq	%rax, %xmm0
 	addq	$8, %rsp
 	ret