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| author | Stefan Schulze Frielinghaus <stefansf@linux.ibm.com> | 2021-05-05 17:12:35 +0200 |
|---|---|---|
| committer | Stefan Schulze Frielinghaus <stefansf@linux.ibm.com> | 2021-05-05 17:12:35 +0200 |
| commit | 06d75273ff7bb7af72ae83abef858c079245b602 (patch) | |
| tree | fd968dba062400c1e776f4ca853b42593dcdbe48 | |
| parent | 1a121f0c20f490ff03f78e7f3f8a22ab9b2bbac9 (diff) | |
PR rtl-optimization/100263: Ensure register can change mode
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.
(cherry picked from commit bb283170e7a1f39bf533651418daf10ad18eccfc)
| -rw-r--r-- | gcc/postreload.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/postreload.c b/gcc/postreload.c index 184b158bb05..b97392337e7 100644 --- a/gcc/postreload.c +++ b/gcc/postreload.c @@ -1704,7 +1704,8 @@ 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 |