diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index f4e9445..b6410c3 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6962,11 +6962,13 @@ simplify_set (rtx x) /* If we have (set FOO (subreg:M (mem:N BAR) 0)) with M wider than N, this would require a paradoxical subreg. Replace the subreg with a - zero_extend to avoid the reload that would otherwise be required. */ + zero_extend to avoid the reload that would otherwise be required. + Don't do this for vector modes, as the transformation is incorrect. */ enum rtx_code extend_op; if (paradoxical_subreg_p (src) && MEM_P (SUBREG_REG (src)) + && !VECTOR_MODE_P (GET_MODE (src)) && (extend_op = load_extend_op (GET_MODE (SUBREG_REG (src)))) != UNKNOWN) { SUBST (SET_SRC (x), |