[RS6000] Fix typos

[Alan Modra]

Applying as obvious.

        * config/rs6000/rs6000.c (rs6000_init_hard_regno_mode_ok): Correct
        rs6000_vector_mem init.  Correct wI and wJ comment.

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index f132c3a27c8..03c91432bff 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -3050,7 +3050,7 @@ rs6000_init_hard_regno_mode_ok (bool global_init_p)
      below.  */
   gcc_assert ((int)VECTOR_NONE == 0);
   memset ((void *) &rs6000_vector_unit[0], '\0', sizeof (rs6000_vector_unit));
-  memset ((void *) &rs6000_vector_mem[0], '\0', sizeof (rs6000_vector_unit));
+  memset ((void *) &rs6000_vector_mem[0], '\0', sizeof (rs6000_vector_mem));
 
   gcc_assert ((int)CODE_FOR_nothing == 0);
   memset ((void *) &reg_addr[0], '\0', sizeof (reg_addr));
@@ -3204,8 +3204,8 @@ rs6000_init_hard_regno_mode_ok (bool global_init_p)
        wy - Register class to do ISA 2.07 SF operations.
        wz - Float register if we can do 32-bit unsigned int loads.
        wH - Altivec register if SImode is allowed in VSX registers.
-       wI - VSX register if SImode is allowed in VSX registers.
-       wJ - VSX register if QImode/HImode are allowed in VSX registers.
+       wI - Float register if SImode is allowed in VSX registers.
+       wJ - Float register if QImode/HImode are allowed in VSX registers.
        wK - Altivec register if QImode/HImode are allowed in VSX registers.  */
 
   if (TARGET_HARD_FLOAT)

-- 
Alan Modra
Australia Development Lab, IBM