diff --git a/test/Analysis/DSGraph/2003-07-16-ConstantExprCollapse.ll b/test/Analysis/DSGraph/2003-07-16-ConstantExprCollapse.ll
index 54e640a..aec1e99 100644
--- a/test/Analysis/DSGraph/2003-07-16-ConstantExprCollapse.ll
+++ b/test/Analysis/DSGraph/2003-07-16-ConstantExprCollapse.ll
@@ -1,5 +1,5 @@
 ; This should cause the global node to collapse!!
-;
+; XFAIL: *
 ; RUN: analyze %s -datastructure-gc --dsgc-check-flags=test:GAU
 
 %Tree = type { int, %Tree*, %Tree* }
diff --git a/test/Analysis/DSGraph/incompletenode.ll b/test/Analysis/DSGraph/incompletenode.ll
index 5dffaab..b9940db 100644
--- a/test/Analysis/DSGraph/incompletenode.ll
+++ b/test/Analysis/DSGraph/incompletenode.ll
@@ -1,6 +1,6 @@
 ; This test was failing because the globals X and Y are marked incomplete
 ; in the TD graph for %test
-
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -no-aa -ds-aa -load-vn -gcse -instcombine | llvm-dis | not grep seteq
 
 %X = internal global int 20
diff --git a/test/Analysis/DSGraph/mustalias.ll b/test/Analysis/DSGraph/mustalias.ll
index d9ff094..4425157 100644
--- a/test/Analysis/DSGraph/mustalias.ll
+++ b/test/Analysis/DSGraph/mustalias.ll
@@ -1,5 +1,5 @@
 ; Test that ds-aa is returning must-alias information when it can.
-
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -no-aa -ds-aa -load-vn -gcse | llvm-dis | not grep load
 
 %X = internal global int 20
diff --git a/test/Assembler/2002-05-02-ParseError.ll b/test/Assembler/2002-05-02-ParseError.ll
index b5809a8..9d84698 100644
--- a/test/Assembler/2002-05-02-ParseError.ll
+++ b/test/Assembler/2002-05-02-ParseError.ll
@@ -1,6 +1,6 @@
 ; This should parse correctly without an 'implementation', but our current YACC
 ; based parser doesn't have the required 2 token lookahead...
-; XFAIL 
+; XFAIL: * 
 
 	%T = type int *
 
diff --git a/test/Assembler/2002-07-08-HugePerformanceProblem.llx b/test/Assembler/2002-07-08-HugePerformanceProblem.llx
index 46caeae..9c97b5d 100644
--- a/test/Assembler/2002-07-08-HugePerformanceProblem.llx
+++ b/test/Assembler/2002-07-08-HugePerformanceProblem.llx
@@ -1,6 +1,5 @@
 ; This file takes about 48 __MINUTES__ to assemble using as.  This is WAY too
 ; long.  The type resolution code needs to be sped up a lot.	
-
 ; RUN: ulimit -t 20; llvm-as < %s
 
 	%ALL_INTERSECTIONS_METHOD = type int (%OBJECT*, %RAY*, %ISTACK*)*
diff --git a/test/C++Frontend/2003-08-28-ForwardType.cpp b/test/C++Frontend/2003-08-28-ForwardType.cpp
index 646729f..a64531c 100644
--- a/test/C++Frontend/2003-08-28-ForwardType.cpp
+++ b/test/C++Frontend/2003-08-28-ForwardType.cpp
@@ -1,4 +1,4 @@
-
+// XFAIL: darwin,sun
 // Default placement versions of operator new.
 inline void* operator new(unsigned, void* __p) throw();
 
diff --git a/test/CFrontend/2003-01-30-UnionInit.c b/test/CFrontend/2003-01-30-UnionInit.c
index 0542254..a655785 100644
--- a/test/CFrontend/2003-01-30-UnionInit.c
+++ b/test/CFrontend/2003-01-30-UnionInit.c
@@ -1,4 +1,4 @@
-
+// XFAIL: linux,sun,darwin
 
 union foo {
   struct { char A, B; } X;
diff --git a/test/CFrontend/2003-02-12-NonlocalGoto.c b/test/CFrontend/2003-02-12-NonlocalGoto.c
index cb84dc9..16373af 100644
--- a/test/CFrontend/2003-02-12-NonlocalGoto.c
+++ b/test/CFrontend/2003-02-12-NonlocalGoto.c
@@ -1,4 +1,4 @@
-
+// XFAIL: *
 /* It is unlikely that LLVM will ever support nested functions, but if it does,
    here is a testcase. */
 
diff --git a/test/CFrontend/2003-06-29-MultipleFunctionDefinition.c b/test/CFrontend/2003-06-29-MultipleFunctionDefinition.c
index d2e07cb..588da71 100644
--- a/test/CFrontend/2003-06-29-MultipleFunctionDefinition.c
+++ b/test/CFrontend/2003-06-29-MultipleFunctionDefinition.c
@@ -1,4 +1,5 @@
-/* This is apparently legal C.  */
+/* This is apparently legal C.  
+ */
 extern __inline__ void test() { }
 
 void test() {
diff --git a/test/CFrontend/2003-08-30-AggregateInitializer.c b/test/CFrontend/2003-08-30-AggregateInitializer.c
index 7ae173d..c7a0f80 100644
--- a/test/CFrontend/2003-08-30-AggregateInitializer.c
+++ b/test/CFrontend/2003-08-30-AggregateInitializer.c
@@ -1,4 +1,4 @@
-
+// XFAIL: linux,sun,darwin
 struct istruct {
   unsigned char C;
 };
diff --git a/test/CFrontend/2003-08-30-LargeIntegerBitfieldMember.c b/test/CFrontend/2003-08-30-LargeIntegerBitfieldMember.c
index 66d778c..fa81802 100644
--- a/test/CFrontend/2003-08-30-LargeIntegerBitfieldMember.c
+++ b/test/CFrontend/2003-08-30-LargeIntegerBitfieldMember.c
@@ -1,4 +1,3 @@
-
 struct foo {
   unsigned int I:1;
   unsigned char J[1][123];
diff --git a/test/CFrontend/2004-01-01-UnknownInitSize.c b/test/CFrontend/2004-01-01-UnknownInitSize.c
index 076c54b..f9b49cc 100644
--- a/test/CFrontend/2004-01-01-UnknownInitSize.c
+++ b/test/CFrontend/2004-01-01-UnknownInitSize.c
@@ -1,7 +1,8 @@
 /*
  * This regression test ensures that the C front end can compile initializers
  * even when it cannot determine the size (as below).
- */
+ * XFAIL: linux,darwin
+*/
 struct one
 {
   int a;
diff --git a/test/CFrontend/2004-02-13-StringInit.c.tr b/test/CFrontend/2004-02-13-StringInit.c.tr
index 6953fd5..0dfe557 100644
--- a/test/CFrontend/2004-02-13-StringInit.c.tr
+++ b/test/CFrontend/2004-02-13-StringInit.c.tr
@@ -1,3 +1,4 @@
+// XFAIL: *
 // RUN: %llvmgcc -xc %s -c -o - | llvm-dis | grep llvm.memset
 
 char test(int X) {
diff --git a/test/CFrontend/2004-02-20-StaticRedeclare.c.tr b/test/CFrontend/2004-02-20-StaticRedeclare.c.tr
index 4549300..e409fac 100644
--- a/test/CFrontend/2004-02-20-StaticRedeclare.c.tr
+++ b/test/CFrontend/2004-02-20-StaticRedeclare.c.tr
@@ -1,3 +1,4 @@
+// XFAIL: *
 // RUN: %llvmgcc -xc %s -c -o - | llvm-dis | not grep declare
 
 int one (int a) {
diff --git a/test/CFrontend/2004-03-07-BitfieldCrash.c b/test/CFrontend/2004-03-07-BitfieldCrash.c
index 3a68d67..42b3bb3 100644
--- a/test/CFrontend/2004-03-07-BitfieldCrash.c
+++ b/test/CFrontend/2004-03-07-BitfieldCrash.c
@@ -1,4 +1,6 @@
-
+/*
+ * XFAIL: linux
+ */
 struct s {
   unsigned long long u33: 33;
   unsigned long long u40: 40;
diff --git a/test/CodeGen/Generic/2003-07-29-BadConstSbyte.ll b/test/CodeGen/Generic/2003-07-29-BadConstSbyte.ll
index 32da5cb..be7767f 100644
--- a/test/CodeGen/Generic/2003-07-29-BadConstSbyte.ll
+++ b/test/CodeGen/Generic/2003-07-29-BadConstSbyte.ll
@@ -9,6 +9,7 @@
 ;; 
 ;; Incorrect LLC Output for the array yy_ec was:
 ;; yy_ec_1094:
+;; XFAIL: darwin
 ;; 	.ascii	"\000\001\001\001\001\001\001\001\001\002\003\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\002\004\005\001\001\006\a\001\b\t\n\v\f\r\016\017\020\020\020\020\020\020\020\020\020\020\001\021\022\023\024\001\001\025\025\025\025\025\025\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\026\027\030\031\032\001\033\034\035\036\037 !\"#$%&'()*+,-./$0$1$234\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001"
 ;;
 
diff --git a/test/CodeGen/Generic/BurgBadRegAlloc.ll b/test/CodeGen/Generic/BurgBadRegAlloc.ll
index 1caee0f..323841c 100644
--- a/test/CodeGen/Generic/BurgBadRegAlloc.ll
+++ b/test/CodeGen/Generic/BurgBadRegAlloc.ll
@@ -6,6 +6,7 @@
 ;; -- outgoing args of some function calls have to be swapped, causing
 ;;    another write/read from stack to do the exchange (use -dregalloc=y).
 ;;
+;; XFAIL: darwin
 	%Arity = type %struct.arity*
 	%Binding = type %struct.binding*
 	%DeltaCost = type [4 x short]
diff --git a/test/CodeGen/X86/2003-08-03-ReservedWordFunction.llx b/test/CodeGen/X86/2003-08-03-ReservedWordFunction.llx
index 8ca27cf..2d0a0bd 100644
--- a/test/CodeGen/X86/2003-08-03-ReservedWordFunction.llx
+++ b/test/CodeGen/X86/2003-08-03-ReservedWordFunction.llx
@@ -1,6 +1,6 @@
 ; This testcase ensures the code emitter does something about the fact that
 ; we can have collisions with keywords
-
+; XFAIL: linux,sun
 ; RUN: llvm-as < %s | llc | not grep '^byte:'
 
 void %byte() {
diff --git a/test/LLC/2003-07-29-BadConstSbyte.ll b/test/LLC/2003-07-29-BadConstSbyte.ll
index 32da5cb..be7767f 100644
--- a/test/LLC/2003-07-29-BadConstSbyte.ll
+++ b/test/LLC/2003-07-29-BadConstSbyte.ll
@@ -9,6 +9,7 @@
 ;; 
 ;; Incorrect LLC Output for the array yy_ec was:
 ;; yy_ec_1094:
+;; XFAIL: darwin
 ;; 	.ascii	"\000\001\001\001\001\001\001\001\001\002\003\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\002\004\005\001\001\006\a\001\b\t\n\v\f\r\016\017\020\020\020\020\020\020\020\020\020\020\001\021\022\023\024\001\001\025\025\025\025\025\025\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\026\027\030\031\032\001\033\034\035\036\037 !\"#$%&'()*+,-./$0$1$234\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001\001"
 ;;
 
diff --git a/test/LLC/BurgBadRegAlloc.ll b/test/LLC/BurgBadRegAlloc.ll
index 1caee0f..323841c 100644
--- a/test/LLC/BurgBadRegAlloc.ll
+++ b/test/LLC/BurgBadRegAlloc.ll
@@ -6,6 +6,7 @@
 ;; -- outgoing args of some function calls have to be swapped, causing
 ;;    another write/read from stack to do the exchange (use -dregalloc=y).
 ;;
+;; XFAIL: darwin
 	%Arity = type %struct.arity*
 	%Binding = type %struct.binding*
 	%DeltaCost = type [4 x short]
diff --git a/test/Transforms/CorrelatedExprs/looptest.ll b/test/Transforms/CorrelatedExprs/looptest.ll
index 62a983a..c9895d1 100644
--- a/test/Transforms/CorrelatedExprs/looptest.ll
+++ b/test/Transforms/CorrelatedExprs/looptest.ll
@@ -11,6 +11,7 @@
 ;
 ; Note that this is a "feature" test, not a correctness test.
 ;
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -cee -simplifycfg | llvm-dis | not grep cond213
 ;
 implementation   ; Functions:
diff --git a/test/Transforms/CorrelatedExprs/nullpointer.ll b/test/Transforms/CorrelatedExprs/nullpointer.ll
index fdb561e..bec083a 100644
--- a/test/Transforms/CorrelatedExprs/nullpointer.ll
+++ b/test/Transforms/CorrelatedExprs/nullpointer.ll
@@ -1,6 +1,7 @@
 ; a load or store of a pointer indicates that the pointer is not null.
 ; Any succeeding uses of the pointer should get this info
-
+;
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -cee -instcombine -simplifycfg | llvm-dis | not grep br
 
 implementation   ; Functions:
diff --git a/test/Transforms/FunctionResolve/2002-11-09-ExternFn.ll b/test/Transforms/FunctionResolve/2002-11-09-ExternFn.ll
index be7fd30..8a1723a 100644
--- a/test/Transforms/FunctionResolve/2002-11-09-ExternFn.ll
+++ b/test/Transforms/FunctionResolve/2002-11-09-ExternFn.ll
@@ -1,3 +1,4 @@
+; XFAIL: *
 ;
 ; RUN: llvm-as < %s | opt -funcresolve -instcombine | llvm-dis | not grep '\.\.\.'
 
diff --git a/test/Transforms/FunctionResolve/2003-08-23-ArgumentWarning.ll b/test/Transforms/FunctionResolve/2003-08-23-ArgumentWarning.ll
index 8d89c7d..d6ac279 100644
--- a/test/Transforms/FunctionResolve/2003-08-23-ArgumentWarning.ll
+++ b/test/Transforms/FunctionResolve/2003-08-23-ArgumentWarning.ll
@@ -1,3 +1,4 @@
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -funcresolve -disable-output 2>&1 | not grep WARNING
 
 declare int %foo(int *%X)
diff --git a/test/Transforms/IndVarsSimplify/subtract.ll b/test/Transforms/IndVarsSimplify/subtract.ll
index 49f4089..40bbce9 100644
--- a/test/Transforms/IndVarsSimplify/subtract.ll
+++ b/test/Transforms/IndVarsSimplify/subtract.ll
@@ -1,3 +1,4 @@
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -indvars | llvm-dis | grep indvar
 
 %G = global long 0
diff --git a/test/Transforms/InstCombine/bit-tracking.ll b/test/Transforms/InstCombine/bit-tracking.ll
index 06cf65c..c979833 100644
--- a/test/Transforms/InstCombine/bit-tracking.ll
+++ b/test/Transforms/InstCombine/bit-tracking.ll
@@ -1,6 +1,6 @@
 ; This file contains various testcases that require tracking whether bits are
 ; set or cleared by various instructions.
-
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep %ELIM
 
 ; test1 - Eliminating the casts in this testcase (by narrowing the AND 
diff --git a/test/Transforms/InstCombine/pow.ll b/test/Transforms/InstCombine/pow.ll
index 308bf5a..2b215db 100644
--- a/test/Transforms/InstCombine/pow.ll
+++ b/test/Transforms/InstCombine/pow.ll
@@ -1,7 +1,7 @@
 ; Testcase for calls to the standard C "pow" function
 ;
 ; Equivalent to: http://gcc.gnu.org/ml/gcc-patches/2003-02/msg01786.html
-
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep 'call double %pow'
 
 declare double %pow(double, double)
diff --git a/test/Transforms/LevelRaise/2002-02-11-ArrayShape.ll b/test/Transforms/LevelRaise/2002-02-11-ArrayShape.ll
index 08d2c24..1bb63dd 100644
--- a/test/Transforms/LevelRaise/2002-02-11-ArrayShape.ll
+++ b/test/Transforms/LevelRaise/2002-02-11-ArrayShape.ll
@@ -17,6 +17,7 @@
 ; The fix is to have the -raise pass correctly convert it to the second
 ; equivelent form.
 ;
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -q -raise > Output/%s.raised.bc
 ; RUN: lli -force-interpreter -array-checks < Output/%s.raised.bc
 ;
diff --git a/test/Transforms/LevelRaise/2002-03-21-MissedRaise.ll b/test/Transforms/LevelRaise/2002-03-21-MissedRaise.ll
index 969fdfc..61c3972 100644
--- a/test/Transforms/LevelRaise/2002-03-21-MissedRaise.ll
+++ b/test/Transforms/LevelRaise/2002-03-21-MissedRaise.ll
@@ -1,7 +1,7 @@
 ; This example should be raised to return a Hash directly without casting.  To
 ; successful, all cast instructions should be eliminated from this testcase.
 ;
-
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -raise | llvm-dis | not grep cast 
 
 	%Hash = type { { uint, sbyte *, \2 } * *, int (uint) *, int } *
diff --git a/test/Transforms/LevelRaise/2002-03-21-MissedRaise2.ll b/test/Transforms/LevelRaise/2002-03-21-MissedRaise2.ll
index bae5a28..be25022 100644
--- a/test/Transforms/LevelRaise/2002-03-21-MissedRaise2.ll
+++ b/test/Transforms/LevelRaise/2002-03-21-MissedRaise2.ll
@@ -2,7 +2,7 @@
 ; instructions to change type if they were 'array' allocations.  This
 ; prevented reg115 from being able to change.
 ;
-
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -raise | llvm-dis | grep '= cast' | not grep \*
 	
 	%Hash = type { { uint, sbyte *, \2 } * *, int (uint) *, int } *
diff --git a/test/Transforms/LevelRaise/2002-03-21-MissedRaise3.ll b/test/Transforms/LevelRaise/2002-03-21-MissedRaise3.ll
index e1350cb..b3e42cc 100644
--- a/test/Transforms/LevelRaise/2002-03-21-MissedRaise3.ll
+++ b/test/Transforms/LevelRaise/2002-03-21-MissedRaise3.ll
@@ -1,3 +1,4 @@
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -raise | llvm-dis | grep '= cast' | not grep \*
 
 	%Hash = type { { uint, sbyte *, \2 } * *, int (uint) *, int } *
diff --git a/test/Transforms/LevelRaise/2002-04-16-MissedRaise.ll b/test/Transforms/LevelRaise/2002-04-16-MissedRaise.ll
index f89551d..c1a4e05 100644
--- a/test/Transforms/LevelRaise/2002-04-16-MissedRaise.ll
+++ b/test/Transforms/LevelRaise/2002-04-16-MissedRaise.ll
@@ -1,3 +1,4 @@
+; XFAIL: *
 ; this testcase is distilled from this C source:
 ; int *foo(unsigned N, unsigned M) {
 ;   unsigned i = (N+1)*sizeof(int);
diff --git a/test/Transforms/LevelRaise/2002-05-02-MissedRaise.ll b/test/Transforms/LevelRaise/2002-05-02-MissedRaise.ll
index 322e324..615217e 100644
--- a/test/Transforms/LevelRaise/2002-05-02-MissedRaise.ll
+++ b/test/Transforms/LevelRaise/2002-05-02-MissedRaise.ll
@@ -1,5 +1,5 @@
 ; This testcase is not level raised properly...
-;
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -raise | llvm-dis | grep ' cast ' | not grep '*'
 
 	%List = type { int, %List* }
diff --git a/test/Transforms/LevelRaise/2002-05-23-MissedRaise.ll b/test/Transforms/LevelRaise/2002-05-23-MissedRaise.ll
index 97549f4..c092e6b 100644
--- a/test/Transforms/LevelRaise/2002-05-23-MissedRaise.ll
+++ b/test/Transforms/LevelRaise/2002-05-23-MissedRaise.ll
@@ -1,3 +1,4 @@
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -raise | llvm-dis | grep '= cast' | not grep \*
 
 %FILE = type { int, ubyte*, ubyte*, ubyte, ubyte, uint, uint, uint }
diff --git a/test/Transforms/LevelRaise/2002-07-16-MissedRaise.ll b/test/Transforms/LevelRaise/2002-07-16-MissedRaise.ll
index 5d49248..c3406ba 100644
--- a/test/Transforms/LevelRaise/2002-07-16-MissedRaise.ll
+++ b/test/Transforms/LevelRaise/2002-07-16-MissedRaise.ll
@@ -4,7 +4,7 @@
 ;
 ; This could be fixed by making all stores add themselves to a list, and check
 ; their arguments are consistent AFTER all other values are propogated.
-
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -raise | llvm-dis | not grep '= cast' 
 
         %Tree = type %struct.tree*
diff --git a/test/Transforms/LevelRaise/2002-07-18-MissedAllocaRaise.ll b/test/Transforms/LevelRaise/2002-07-18-MissedAllocaRaise.ll
index e8a71be..422b977 100644
--- a/test/Transforms/LevelRaise/2002-07-18-MissedAllocaRaise.ll
+++ b/test/Transforms/LevelRaise/2002-07-18-MissedAllocaRaise.ll
@@ -1,5 +1,5 @@
 ; Looks like we don't raise alloca's like we do mallocs
-;
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -raise | llvm-dis | grep '= cast' | not grep \*
 
 implementation   ; Functions:
diff --git a/test/Transforms/Mem2Reg/DifferingTypes.ll b/test/Transforms/Mem2Reg/DifferingTypes.ll
index 91e33e0..8cf793c 100644
--- a/test/Transforms/Mem2Reg/DifferingTypes.ll
+++ b/test/Transforms/Mem2Reg/DifferingTypes.ll
@@ -1,7 +1,7 @@
 ; This is a feature test.  Hopefully one day this will be implemented.  The 
 ; generated code should perform the appropriate masking operations required 
 ; depending on the endianness of the target...
-
+; XFAIL: *
 ; RUN: llvm-as < %s | opt -mem2reg | llvm-dis | not grep 'alloca'
 
 implementation
diff --git a/test/Transforms/TailCallElim/tail_call_with_branch.ll b/test/Transforms/TailCallElim/tail_call_with_branch.ll
index de606fc..159cb4a 100644
--- a/test/Transforms/TailCallElim/tail_call_with_branch.ll
+++ b/test/Transforms/TailCallElim/tail_call_with_branch.ll
@@ -1,7 +1,7 @@
 ; This testcase is due to tail-duplication not wanting to copy the return
 ; instruction into the terminating blocks because there was other code
 ; optimized out of the function after the taildup happened.
-
+; XFAIL: linux,sun,darwin
 ; RUN: llvm-as < %s | opt -tailcallelim | llvm-dis | not grep call
 
 int %t4(int %a) {