diff --git a/llvm/test/Regression/Transforms/GlobalOpt/2006-07-07-InlineAsmCrash.ll b/llvm/test/Regression/Transforms/GlobalOpt/2006-07-07-InlineAsmCrash.ll
new file mode 100644
index 000000000000..52d84ca4bdf8
--- /dev/null
+++ b/llvm/test/Regression/Transforms/GlobalOpt/2006-07-07-InlineAsmCrash.ll
@@ -0,0 +1,138 @@
+; RUN: llvm-as< %s | opt -globalopt -disable-output
+; PR820
+target endian = little
+target pointersize = 32
+target triple = "i686-pc-linux-gnu"
+	%struct..0FileDescriptor = type { int }
+	"struct.FlagDescription<int32>" = type { ubyte*, int*, bool, bool, int, ubyte* }
+	"struct.FlagRegisterer<bool>" = type { ubyte }
+	%struct.MutexLock = type { %struct..0FileDescriptor* }
+	"struct.std::DisabledRangeMap" = type { "struct.std::_Rb_tree<const char*,std::pair<const char* const, FlagDescription<bool> >,std::_Select1st<std::pair<const char* const, FlagDescription<bool> > >,StringCmp,std::allocator<std::pair<const char* const, FlagDescription<bool> > > >" }
+	"struct.std::_Rb_tree<const char*,std::pair<const char* const, FlagDescription<bool> >,std::_Select1st<std::pair<const char* const, FlagDescription<bool> > >,StringCmp,std::allocator<std::pair<const char* const, FlagDescription<bool> > > >" = type { "struct.std::_Rb_tree<const char*,std::pair<const char* const, FlagDescription<bool> >,std::_Select1st<std::pair<const char* const, FlagDescription<bool> > >,StringCmp,std::allocator<std::pair<const char* const, FlagDescription<bool> > > >::_Rb_tree_impl<StringCmp,false>" }
+	"struct.std::_Rb_tree<const char*,std::pair<const char* const, FlagDescription<bool> >,std::_Select1st<std::pair<const char* const, FlagDescription<bool> > >,StringCmp,std::allocator<std::pair<const char* const, FlagDescription<bool> > > >::_Rb_tree_impl<StringCmp,false>" = type { "struct.FlagRegisterer<bool>", "struct.std::_Rb_tree_node_base", uint }
+	"struct.std::_Rb_tree_const_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >" = type { "struct.std::_Rb_tree_node_base"* }
+	"struct.std::_Rb_tree_node_base" = type { uint, "struct.std::_Rb_tree_node_base"*, "struct.std::_Rb_tree_node_base"*, "struct.std::_Rb_tree_node_base"* }
+	"struct.std::_Vector_base<int,std::allocator<int> >" = type { "struct.std::_Vector_base<int,std::allocator<int> >::_Vector_impl" }
+	"struct.std::_Vector_base<int,std::allocator<int> >::_Vector_impl" = type { int*, int*, int* }
+	"struct.std::vector<int,std::allocator<int> >" = type { "struct.std::_Vector_base<int,std::allocator<int> >" }
+%registry_lock = external global %struct..0FileDescriptor		; <%struct..0FileDescriptor*> [#uses=0]
+%_ZN61FLAG__foo_int32_44FLAGS_E = external global "struct.FlagRegisterer<bool>"		; <"struct.FlagRegisterer<bool>"*> [#uses=0]
+%llvm.global_ctors = appending global [20 x { int, void ()* }] [ { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN62FLAG__foo_string_10FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN60FLAG__foo_bool_19FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZNK5Bzh4Enum13is_contiguousEv }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN62FLAG__foo_string_17FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN61FLAG__foo_int32_21FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN7ScannerC2Ev }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__Z11StripStringPSsPKcc }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZNK9__gnu_cxx4hashI11StringPieceEclERKS1_ }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN8Hasher325ResetEj }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__Z25ACLRv }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN61FLAG__foo_int64_25FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN61FLAG__foo_int32_7FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN62FLAG__foo_string_18FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN62FLAG__foo_string_17FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN61FLAG__foo_int32_25FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I_eventbuf }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN61FLAG__foo_int32_26FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN62FLAG__foo_string_16FLAGS_E }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__ZN17InitializerC2EPKcS1_PFvvE }, { int, void ()* } { int 65535, void ()* %_GLOBAL__I__checker_bcad_variable } ]		; <[20 x { int, void ()* }]*> [#uses=0]
+
+implementation   ; Functions:
+
+declare void %_GLOBAL__I__ZN62FLAG__foo_string_10FLAGS_E()
+
+declare void %_GLOBAL__I__ZN60FLAG__foo_bool_19FLAGS_E()
+
+declare void %_GLOBAL__I__ZNK5Bzh4Enum13is_contiguousEv()
+
+declare void %_GLOBAL__I__ZN62FLAG__foo_string_17FLAGS_E()
+
+declare void %_GLOBAL__I__ZN61FLAG__foo_int32_21FLAGS_E()
+
+void %_ZN14FlagRegistererIiEC1EPKcRK15FlagDescriptionIiE() {
+entry:
+	call void %_Z12RegisterFlagIiEvPKcRK15FlagDescriptionIT_E( )
+	ret void
+}
+
+void %_Z12RegisterFlagIiEvPKcRK15FlagDescriptionIT_E() {
+entry:
+	call void %_ZN9MutexLockC1EP5Mutex( )
+	ret void
+}
+
+declare void %_GLOBAL__I__ZN7ScannerC2Ev()
+
+declare void %_GLOBAL__I__Z11StripStringPSsPKcc()
+
+void %_ZNSt6vectorIiSaIiEEC1ERKS0_() {
+entry:
+	unreachable
+}
+
+declare void %_GLOBAL__I__ZNK9__gnu_cxx4hashI11StringPieceEclERKS1_()
+
+declare void %_GLOBAL__I__ZN8Hasher325ResetEj()
+
+declare void %_GLOBAL__I__Z25ACLRv()
+
+void %_ZN9MutexLockC1EP5Mutex() {
+entry:
+	call void %_ZN5Mutex4LockEv( )
+	ret void
+}
+
+void %_ZN5Mutex4LockEv() {
+entry:
+	call void %_Z22Acquire_CASPViii( )
+	ret void
+}
+
+csretcc void %_ZNSt3mapIPKc15FlagDescriptionIiE9StringCmpSaISt4pairIKS1_S3_EEE3endEv("struct.std::_Rb_tree_const_iterator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >"* %agg.result) {
+entry:
+	unreachable
+}
+
+declare void %_GLOBAL__I__ZN61FLAG__foo_int64_25FLAGS_E()
+
+void %_Z14CASPViii() {
+entry:
+	%tmp3 = call int asm sideeffect "lock; cmpxchg $1,$2", "={ax},q,m,0,~{dirflag},~{fpsr},~{flags},~{memory}"( int 0, int* null, int 0 )		; <int> [#uses=0]
+	unreachable
+}
+
+declare void %_GLOBAL__I__ZN61FLAG__foo_int32_7FLAGS_E()
+
+declare void %_GLOBAL__I__ZN62FLAG__foo_string_18FLAGS_E()
+
+void %_Z22Acquire_CASPViii() {
+entry:
+	call void %_Z14CASPViii( )
+	unreachable
+}
+
+declare void %_GLOBAL__I__ZN61FLAG__foo_int32_25FLAGS_E()
+
+declare void %_GLOBAL__I_eventbuf()
+
+void %_GLOBAL__I__ZN61FLAG__foo_int32_26FLAGS_E() {
+entry:
+	call void %_Z41__static_initialization_and_destruction_0ii1662( int 1, int 65535 )
+	ret void
+}
+
+void %_Z41__static_initialization_and_destruction_0ii1662(int %__initialize_p, int %__priority) {
+entry:
+	%__initialize_p_addr = alloca int		; <int*> [#uses=2]
+	%__priority_addr = alloca int		; <int*> [#uses=2]
+	store int %__initialize_p, int* %__initialize_p_addr
+	store int %__priority, int* %__priority_addr
+	%tmp = load int* %__priority_addr		; <int> [#uses=1]
+	%tmp = seteq int %tmp, 65535		; <bool> [#uses=1]
+	br bool %tmp, label %cond_true, label %cond_next14
+
+cond_true:		; preds = %entry
+	%tmp8 = load int* %__initialize_p_addr		; <int> [#uses=1]
+	%tmp9 = seteq int %tmp8, 1		; <bool> [#uses=1]
+	br bool %tmp9, label %cond_true10, label %cond_next14
+
+cond_true10:		; preds = %cond_true
+	call void %_ZN14FlagRegistererIiEC1EPKcRK15FlagDescriptionIiE( )
+	ret void
+
+cond_next14:		; preds = %cond_true, %entry
+	ret void
+}
+
+declare void %_GLOBAL__I__ZN62FLAG__foo_string_16FLAGS_E()
+
+void %_ZN9__gnu_cxx13new_allocatorIPNS_15_Hashtable_nodeIjEEEC2Ev() {
+entry:
+	unreachable
+}
+
+declare void %_GLOBAL__I__ZN17InitializerC2EPKcS1_PFvvE()
+
+declare void %_GLOBAL__I__checker_bcad_variable()