ubsan: microblaze: left shift cannot be represented in type 'int'

[Alan Modra]

	* microblaze-dis.c (read_insn_microblaze): Avoid signed overflow.

diff --git a/opcodes/microblaze-dis.c b/opcodes/microblaze-dis.c
index 2b3aa8e078..5df7ae497e 100644
--- a/opcodes/microblaze-dis.c
+++ b/opcodes/microblaze-dis.c
@@ -200,9 +200,11 @@ read_insn_microblaze (bfd_vma memaddr,
     }
 
   if (info->endian == BFD_ENDIAN_BIG)
-    inst = (ibytes[0] << 24) | (ibytes[1] << 16) | (ibytes[2] << 8) | ibytes[3];
+    inst = (((unsigned) ibytes[0] << 24) | (ibytes[1] << 16)
+	    | (ibytes[2] << 8) | ibytes[3]);
   else if (info->endian == BFD_ENDIAN_LITTLE)
-    inst = (ibytes[3] << 24) | (ibytes[2] << 16) | (ibytes[1] << 8) | ibytes[0];
+    inst = (((unsigned) ibytes[3] << 24) | (ibytes[2] << 16)
+	    | (ibytes[1] << 8) | ibytes[0]);
   else
     abort ();
 

-- 
Alan Modra
Australia Development Lab, IBM