mn10300: ubsan: shift exponent too large

[Alan Modra]

	* elf-m10300.c (mn10300_elf_relax_delete_bytes): Calculate
	alignment from reloc addend after reloc type R_MN10300_ALIGN is
	found.

diff --git a/bfd/elf-m10300.c b/bfd/elf-m10300.c
index 7c63ce4cd1..7a2b67569b 100644
--- a/bfd/elf-m10300.c
+++ b/bfd/elf-m10300.c
@@ -2418,13 +2418,14 @@ mn10300_elf_relax_delete_bytes (bfd *abfd,
 	 are deleting.  */
       for (; irel < irelend; irel++)
 	{
-	  int alignment = 1 << irel->r_addend;
-
 	  if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_ALIGN
 	      && irel->r_offset > addr
-	      && irel->r_offset < toaddr
-	      && (count < alignment
-		  || alignment % count != 0))
+	      && irel->r_offset < toaddr)
+	    {
+	      int alignment = 1 << irel->r_addend;
+
+	      if (count < alignment
+		  || alignment % count != 0)
 		{
 		  irelalign = irel;
 		  toaddr = irel->r_offset;
@@ -2432,6 +2433,7 @@ mn10300_elf_relax_delete_bytes (bfd *abfd,
 		}
 	    }
 	}
+    }
 
   /* Actually delete the bytes.  */
   memmove (contents + addr, contents + addr + count,