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| author | Vladimir N. Makarov <vmakarov@redhat.com> | 2020-03-13 14:58:57 -0400 |
|---|---|---|
| committer | Vladimir N. Makarov <vmakarov@redhat.com> | 2020-03-13 14:58:57 -0400 |
| commit | a4504f32c056db781a2bdc104dffa1b29684c930 (patch) | |
| tree | 691e3b6f8f72dc1a0c4ced279eb087b12b8da170 | |
| parent | 45ee7a35f347e59f003d65bce0d43d5123d827cf (diff) | |
| download | gcc-a4504f32c056db781a2bdc104dffa1b29684c930.zip gcc-a4504f32c056db781a2bdc104dffa1b29684c930.tar.gz gcc-a4504f32c056db781a2bdc104dffa1b29684c930.tar.bz2 | |
PR92303: Try to simplify memory subreg.
2020-03-13 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/92303
* lra-spills.c (remove_pseudos): Try to simplify memory subreg.
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/lra-spills.c | 11 |
2 files changed, 15 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d63b831..4ea81e6 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2020-03-13 Vladimir Makarov <vmakarov@redhat.com> + + PR rtl-optimization/92303 + * lra-spills.c (remove_pseudos): Try to simplify memory subreg. + 2020-03-13 Segher Boessenkool <segher@kernel.crashing.org> PR rtl-optimization/94148 diff --git a/gcc/lra-spills.c b/gcc/lra-spills.c index 0022611..01256e7 100644 --- a/gcc/lra-spills.c +++ b/gcc/lra-spills.c @@ -421,7 +421,16 @@ remove_pseudos (rtx *loc, rtx_insn *insn) if (*loc == NULL_RTX) return res; code = GET_CODE (*loc); - if (code == REG && (i = REGNO (*loc)) >= FIRST_PSEUDO_REGISTER + if (code == SUBREG && REG_P (SUBREG_REG (*loc))) + { + /* Try to remove memory subregs to simplify LRA job + and avoid LRA cycling in case of subreg memory reload. */ + res = remove_pseudos (&SUBREG_REG (*loc), insn); + if (GET_CODE (SUBREG_REG (*loc)) == MEM) + alter_subreg (loc, false); + return res; + } + else if (code == REG && (i = REGNO (*loc)) >= FIRST_PSEUDO_REGISTER && lra_get_regno_hard_regno (i) < 0 /* We do not want to assign memory for former scratches because it might result in an address reload for some targets. In |