diff --git a/test/CodeGen/X86/constpool.ll b/test/CodeGen/X86/constpool.ll
new file mode 100644
index 00000000000..60d51e56c3b
--- /dev/null
+++ b/test/CodeGen/X86/constpool.ll
@@ -0,0 +1,16 @@
+; RUN: llvm-as < %s | llc 
+; RUN: llvm-as < %s | llc -fast-isel
+; RUN: llvm-as < %s | llc -march=x86-64
+; RUN: llvm-as < %s | llc -fast-isel -march=x86-64
+; PR4466
+
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "i386-apple-darwin9.7"
+
+define i32 @main() nounwind {
+entry:
+	%0 = fcmp oeq float undef, 0x7FF0000000000000		; <i1> [#uses=1]
+	%1 = zext i1 %0 to i32		; <i32> [#uses=1]
+	store i32 %1, i32* undef, align 4
+	ret i32 undef
+}