Index: lib/CodeGen/GlobalISel/IRTranslator.cpp
===================================================================
--- lib/CodeGen/GlobalISel/IRTranslator.cpp
+++ lib/CodeGen/GlobalISel/IRTranslator.cpp
@@ -1253,6 +1253,15 @@
 
   assert(PendingPHIs.empty() && "stale PHIs");
 
+  if (!DL->isLittleEndian()) {
+    // Currently we don't properly handle big endian code.
+    OptimizationRemarkMissed R("gisel-irtranslator", "GISelFailure",
+                               MF->getFunction()->getSubprogram(),
+                               &MF->getFunction()->getEntryBlock());
+    R << "unable to translate in big endian mode";
+    reportTranslationError(*MF, *TPC, *ORE, R);
+  }
+
   // Release the per-function state when we return, whether we succeeded or not.
   auto FinalizeOnReturn = make_scope_exit([this]() { finalizeFunction(); });
 
Index: test/CodeGen/ARM/GlobalISel/arm-irtranslator.ll
===================================================================
--- test/CodeGen/ARM/GlobalISel/arm-irtranslator.ll
+++ test/CodeGen/ARM/GlobalISel/arm-irtranslator.ll
@@ -1,5 +1,6 @@
 ; RUN: llc -mtriple arm-unknown -mattr=+vfp2,+v4t -global-isel -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=LITTLE
-; RUN: llc -mtriple armeb-unknown -mattr=+vfp2,+v4t -global-isel -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=BIG
+; RUN: llc -mtriple armeb-unknown -mattr=+vfp2,+v4t -global-isel -global-isel-abort=0 -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=BIG
+; XFAIL: armeb
 
 define void @test_void_return() {
 ; CHECK-LABEL: name: test_void_return
Index: test/CodeGen/ARM/GlobalISel/arm-param-lowering.ll
===================================================================
--- test/CodeGen/ARM/GlobalISel/arm-param-lowering.ll
+++ test/CodeGen/ARM/GlobalISel/arm-param-lowering.ll
@@ -1,5 +1,6 @@
 ; RUN: llc -mtriple arm-unknown -mattr=+vfp2,+v4t -global-isel -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=LITTLE
-; RUN: llc -mtriple armeb-unknown -mattr=+vfp2,+v4t -global-isel -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=BIG
+; RUN: llc -mtriple armeb-unknown -mattr=+vfp2,+v4t -global-isel -global-isel-abort=0 -stop-after=irtranslator -verify-machineinstrs %s -o - | FileCheck %s -check-prefix=CHECK -check-prefix=BIG
+; XFAIL: armeb
 
 declare arm_aapcscc i32* @simple_reg_params_target(i32, i32*)