diff options
| author | Surya Kumari Jangala <jskumari@linux.ibm.com> | 2023-08-14 09:34:56 -0500 |
|---|---|---|
| committer | Surya Kumari Jangala <jskumari@linux.ibm.com> | 2023-08-16 12:20:56 -0500 |
| commit | 02ecc9a26324d142c5cd19d24526b9c23aabc1c3 (patch) | |
| tree | 9961d56ed8ff847d657f9177f1d418cacd33ee2f | |
| parent | 2c907d5456ad0ccbfdcb7aa3f7a37a20a59c5c1a (diff) | |
| download | gcc-02ecc9a26324d142c5cd19d24526b9c23aabc1c3.zip gcc-02ecc9a26324d142c5cd19d24526b9c23aabc1c3.tar.gz gcc-02ecc9a26324d142c5cd19d24526b9c23aabc1c3.tar.bz2 | |
ira: update allocated_hardreg_p[] in improve_allocation() [PR110254]
The improve_allocation() routine does not update the
allocated_hardreg_p[] array after an allocno is assigned a register.
If the register chosen in improve_allocation() is one that already has
been assigned to a conflicting allocno, then allocated_hardreg_p[]
already has the corresponding bit set to TRUE, so nothing needs to be
done.
But improve_allocation() can also choose a register that has not been
assigned to a conflicting allocno, and also has not been assigned to any
other allocno. In this case, allocated_hardreg_p[] has to be updated.
2023-07-21 Surya Kumari Jangala <jskumari@linux.ibm.com>
gcc/
PR rtl-optimization/110254
* ira-color.cc (improve_allocation): Update array
allocated_hard_reg_p.
| -rw-r--r-- | gcc/ira-color.cc | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/ira-color.cc b/gcc/ira-color.cc index 1fb2958..5807d6d 100644 --- a/gcc/ira-color.cc +++ b/gcc/ira-color.cc @@ -3340,6 +3340,10 @@ improve_allocation (void) } /* Assign the best chosen hard register to A. */ ALLOCNO_HARD_REGNO (a) = best; + + for (j = nregs - 1; j >= 0; j--) + allocated_hardreg_p[best + j] = true; + if (internal_flag_ira_verbose > 2 && ira_dump_file != NULL) fprintf (ira_dump_file, "Assigning %d to a%dr%d\n", best, ALLOCNO_NUM (a), ALLOCNO_REGNO (a)); |