| Message ID | 20210505072000.3513197-1-stefansf@linux.ibm.com |
|---|---|
| State | New |
| Headers | show |
| Series | PR rtl-optimization/100263: Ensure register can change mode | expand |
> For move2add_valid_value_p we also have to ask the target whether a > register can be accessed in a different mode than it was set before. > > gcc/ChangeLog: > > PR rtl-optimization/100263 > * postreload.c (move2add_valid_value_p): Ensure register can > change mode. > > Bootstrapped and regtested releases/gcc-{8,9,10,11} and master on IBM Z. > Ok for those branches? Yes, OK everywhere, thanks.
diff --git a/gcc/postreload.c b/gcc/postreload.c index dc67643384d..60a622dbaf3 100644 --- a/gcc/postreload.c +++ b/gcc/postreload.c @@ -1725,7 +1725,8 @@ move2add_valid_value_p (int regno, scalar_int_mode mode) { scalar_int_mode old_mode; if (!is_a <scalar_int_mode> (reg_mode[regno], &old_mode) - || !MODES_OK_FOR_MOVE2ADD (mode, old_mode)) + || !MODES_OK_FOR_MOVE2ADD (mode, old_mode) + || !REG_CAN_CHANGE_MODE_P (regno, old_mode, mode)) return false; /* The value loaded into regno in reg_mode[regno] is also valid in mode after truncation only if (REG:mode regno) is the lowpart of
For move2add_valid_value_p we also have to ask the target whether a register can be accessed in a different mode than it was set before. gcc/ChangeLog: PR rtl-optimization/100263 * postreload.c (move2add_valid_value_p): Ensure register can change mode. Bootstrapped and regtested releases/gcc-{8,9,10,11} and master on IBM Z. Ok for those branches? --- gcc/postreload.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)