Index: projects/compiler-rt/cmake/config-ix.cmake
===================================================================
--- projects/compiler-rt/cmake/config-ix.cmake
+++ projects/compiler-rt/cmake/config-ix.cmake
@@ -233,7 +233,8 @@
 filter_available_targets(PROFILE_SUPPORTED_ARCH x86_64 i386 i686 arm mips mips64
   mipsel mips64el aarch64 powerpc64 powerpc64le)
 filter_available_targets(TSAN_SUPPORTED_ARCH x86_64 mips64 mips64el)
-filter_available_targets(UBSAN_SUPPORTED_ARCH x86_64 i386 i686 arm aarch64 mips mipsel mips64 mips64el)
+filter_available_targets(UBSAN_SUPPORTED_ARCH x86_64 i386 i686 arm aarch64 mips
+  mipsel mips64 mips64el powerpc64 powerpc64le)
 
 if(ANDROID)
   set(OS_NAME "Android")
Index: projects/compiler-rt/lib/ubsan/ubsan_platform.h
===================================================================
--- projects/compiler-rt/lib/ubsan/ubsan_platform.h
+++ projects/compiler-rt/lib/ubsan/ubsan_platform.h
@@ -16,7 +16,7 @@
 // Other platforms should be easy to add, and probably work as-is.
 #if (defined(__linux__) || defined(__FreeBSD__) || defined(__APPLE__)) && \
     (defined(__x86_64__) || defined(__i386__) || defined(__arm__) || \
-     defined(__aarch64__) || defined(__mips__))
+     defined(__aarch64__) || defined(__mips__) || defined(__powerpc64__))
 # define CAN_SANITIZE_UB 1
 #else
 # define CAN_SANITIZE_UB 0
Index: projects/compiler-rt/lib/ubsan/ubsan_value.cc
===================================================================
--- projects/compiler-rt/lib/ubsan/ubsan_value.cc
+++ projects/compiler-rt/lib/ubsan/ubsan_value.cc
@@ -83,7 +83,13 @@
 #endif
       case 32: {
         float Value;
-        internal_memcpy(&Value, &Val, 4);
+#if defined(__BIG_ENDIAN__)
+       // For big endian the float value is in the second 4 bytes
+       //  instead of the first 4 bytes.
+       internal_memcpy(&Value, ((const char*)&Val)+4, 4);
+#else 
+       internal_memcpy(&Value, &Val, 4);
+#endif
         return Value;
       }
       case 64: {
Index: projects/compiler-rt/test/ubsan/TestCases/Float/cast-overflow.cpp
===================================================================
--- projects/compiler-rt/test/ubsan/TestCases/Float/cast-overflow.cpp
+++ projects/compiler-rt/test/ubsan/TestCases/Float/cast-overflow.cpp
@@ -82,11 +82,13 @@
     // FIXME: Produce a source location for these checks and test for it here.
 
     // Floating point -> integer overflow.
-  case '0':
+  case '0': {
     // Note that values between 0x7ffffe00 and 0x80000000 may or may not
     // successfully round-trip, depending on the rounding mode.
     // CHECK-0: runtime error: value 2.14748{{.*}} is outside the range of representable values of type 'int'
-    return MaxFloatRepresentableAsInt + 0x80;
+    int test_int = MaxFloatRepresentableAsInt + 0x80;
+    return 0;
+    }
   case '1':
     // CHECK-1: runtime error: value -2.14748{{.*}} is outside the range of representable values of type 'int'
     return MinFloatRepresentableAsInt - 0x100;
@@ -96,26 +98,32 @@
     volatile unsigned u = (unsigned)f;
     return 0;
   }
-  case '3':
+  case '3': {
     // CHECK-3: runtime error: value 4.2949{{.*}} is outside the range of representable values of type 'unsigned int'
-    return (unsigned)(MaxFloatRepresentableAsUInt + 0x100);
+    int test_int = (unsigned)(MaxFloatRepresentableAsUInt + 0x100);
+    return 0;
+  }
 
-  case '4':
+  case '4': {
     // CHECK-4: runtime error: value {{.*}} is outside the range of representable values of type 'int'
-    return Inf;
+    int test_int = Inf;
+    return 0;
+  }
   case '5':
     // CHECK-5: runtime error: value {{.*}} is outside the range of representable values of type 'int'
     return NaN;
 
     // Integer -> floating point overflow.
-  case '6':
+  case '6': {
     // CHECK-6: {{runtime error: value 0xffffff00000000000000000000000001 is outside the range of representable values of type 'float'|__int128 not supported}}
 #ifdef __SIZEOF_INT128__
-    return (float)(FloatMaxAsUInt128 + 1);
+    int test_int = (float)(FloatMaxAsUInt128 + 1);
+    return 0;
 #else
     puts("__int128 not supported");
     return 0;
 #endif
+  }
   // FIXME: The backend cannot lower __fp16 operations on x86 yet.
   //case '7':
   //  (__fp16)65504; // ok