Hi.
It's quite obvious mistake, where we access an array variable before
we check index boundary.
I'll install it after bootstrap & regression tests.
Martin
gcc/ChangeLog:
2018-03-16 Martin Liska <mli...@suse.cz>
PR rtl-optimization/84635
* regrename.c (build_def_use): Use matches_mode only when
matches >= 0.
---
gcc/regrename.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/gcc/regrename.c b/gcc/regrename.c
index dcec77adf75..45754812f6c 100644
--- a/gcc/regrename.c
+++ b/gcc/regrename.c
@@ -1703,14 +1703,18 @@ build_def_use (basic_block bb)
and we must instead make sure to make the operand visible
to the machinery that tracks hard registers. */
machine_mode i_mode = recog_data.operand_mode[i];
- machine_mode matches_mode = recog_data.operand_mode[matches];
- if (matches >= 0
- && maybe_ne (GET_MODE_SIZE (i_mode),
- GET_MODE_SIZE (matches_mode))
- && !verify_reg_in_set (op, &live_in_chains))
+ if (matches >= 0)
{
- untracked_operands |= 1 << i;
- untracked_operands |= 1 << matches;
+ machine_mode matches_mode
+ = recog_data.operand_mode[matches];
+
+ if (maybe_ne (GET_MODE_SIZE (i_mode),
+ GET_MODE_SIZE (matches_mode))
+ && !verify_reg_in_set (op, &live_in_chains))
+ {
+ untracked_operands |= 1 << i;
+ untracked_operands |= 1 << matches;
+ }
}
}
#ifdef STACK_REGS
