diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/combine.c | 9 |
2 files changed, 13 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9d19693..799f4c8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -4,6 +4,10 @@ (handle_vector_size_attribute): Use it to avoid generating a new type node each time we are called. + * combine.c (subst): Avoid trying to make a vector mode subreg of + an integer constant. + (gen_lowpart_for_combine): Likewise. + 2002-04-18 Roger Sayle <roger@eyesopen.com> Jakub Jelinek <jakub@redhat.com> diff --git a/gcc/combine.c b/gcc/combine.c index e051c61..67f6290 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -3538,6 +3538,9 @@ subst (x, from, to, in_dest, unique_copy) if (GET_CODE (new) == CONST_INT && GET_CODE (x) == SUBREG) { + if (VECTOR_MODE_P (GET_MODE (x))) + return gen_rtx_CLOBBER (VOIDmode, const0_rtx); + x = simplify_subreg (GET_MODE (x), new, GET_MODE (SUBREG_REG (x)), SUBREG_BYTE (x)); @@ -9800,6 +9803,12 @@ gen_lowpart_for_combine (mode, x) || GET_MODE_SIZE (GET_MODE (x)) == GET_MODE_SIZE (mode))) return gen_rtx_CLOBBER (GET_MODE (x), const0_rtx); + /* simplify_gen_subreg does not know how to handle the case where we try + to convert an integer constant to a vector. + ??? We could try to teach it to generate CONST_VECTORs. */ + if (GET_MODE (x) == VOIDmode && VECTOR_MODE_P (mode)) + return gen_rtx_CLOBBER (GET_MODE (x), const0_rtx); + /* X might be a paradoxical (subreg (mem)). In that case, gen_lowpart won't know what to do. So we will strip off the SUBREG here and process normally. */ |