diff --git a/test/CodeGen/X86/overlap-add.ll b/test/CodeGen/X86/overlap-add.ll
index 7fd99fe93c8..0a078be710c 100644
--- a/test/CodeGen/X86/overlap-add.ll
+++ b/test/CodeGen/X86/overlap-add.ll
@@ -8,6 +8,9 @@
 
 ; RUN: llvm-as < %s | llc -march=x86 -x86-asm-syntax=intel | not grep 'mov %E.X, %E.X'
 
+; FIXME: We need live variable information about flags to do this xform safely. :(
+; XFAIL: *
+
 %G = external global int
 
 int %test1(int %X, int %Y) {
diff --git a/test/CodeGen/X86/overlap-shift.ll b/test/CodeGen/X86/overlap-shift.ll
index cf5e8976326..799768dfd73 100644
--- a/test/CodeGen/X86/overlap-shift.ll
+++ b/test/CodeGen/X86/overlap-shift.ll
@@ -8,6 +8,9 @@
 
 ; RUN: llvm-as < %s | llc -march=x86 -x86-asm-syntax=intel | not grep 'mov %E.X, %E.X'
 
+; FIXME: We need live variable information about flags to do this xform safely. :(
+; XFAIL: *
+
 %G = external global int
 
 int %test1(int %X) {