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| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/expmed.c | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 76992ee..2f3fcae 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2015-05-28 DJ Delorie <dj@redhat.com> + + * expmed.c (extract_bit_field_1): Avoid clobbering a + yet-to-be-used base/index register. + 2015-05-30 Jan Hubicka <hubicka@ucw.cz> * alias.c (alias_set_entry_d): Add is_pointer and has_pointer. diff --git a/gcc/expmed.c b/gcc/expmed.c index fa13f8c..4b2b026 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -1616,6 +1616,11 @@ extract_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize, if (target == 0 || !REG_P (target) || !valid_multiword_target_p (target)) target = gen_reg_rtx (mode); + /* In case we're about to clobber a base register or something + (see gcc.c-torture/execute/20040625-1.c). */ + if (reg_mentioned_p (target, str_rtx)) + target = gen_reg_rtx (mode); + /* Indicate for flow that the entire target reg is being set. */ emit_clobber (target); |