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| author | Vladimir N. Makarov <vmakarov@redhat.com> | 2022-12-02 08:18:04 -0500 |
|---|---|---|
| committer | Vladimir N. Makarov <vmakarov@redhat.com> | 2022-12-02 08:24:03 -0500 |
| commit | 70596a0fb2a2ec072e1e97e37616e05041dfa4e5 (patch) | |
| tree | 9adb3b92b62708d863ef3dd5f0ac716dafa2a500 | |
| parent | e55251f3d3598ca6e001c4afa51b2ec913b4cac1 (diff) | |
| download | gcc-70596a0fb2a2ec072e1e97e37616e05041dfa4e5.zip gcc-70596a0fb2a2ec072e1e97e37616e05041dfa4e5.tar.gz gcc-70596a0fb2a2ec072e1e97e37616e05041dfa4e5.tar.bz2 | |
LRA: Check hard reg availability of pseudo and its subreg for pseudo reload
Do not reload subreg pseudo if there are hard regs for subreg mode
but there are no hard regs for pseudo mode.
PR target/106462
gcc/ChangeLog:
* lra-constraints.cc (curr_insn_transform): Check available hard
regs for pseudo and its subreg to decide what to reload.
gcc/testsuite/ChangeLog:
* gcc.target/mips/pr106462.c: New test.
| -rw-r--r-- | gcc/lra-constraints.cc | 13 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/mips/pr106462.c | 12 |
2 files changed, 24 insertions, 1 deletions
diff --git a/gcc/lra-constraints.cc b/gcc/lra-constraints.cc index d92ab76..02b5ab4 100644 --- a/gcc/lra-constraints.cc +++ b/gcc/lra-constraints.cc @@ -4582,7 +4582,18 @@ curr_insn_transform (bool check_only_p) || (partial_subreg_p (mode, GET_MODE (reg)) && known_le (GET_MODE_SIZE (GET_MODE (reg)), UNITS_PER_WORD) - && WORD_REGISTER_OPERATIONS))) + && WORD_REGISTER_OPERATIONS)) + /* Avoid the situation when there are no available hard regs + for the pseudo mode but there are ones for the subreg + mode: */ + && !(goal_alt[i] != NO_REGS + && REGNO (reg) >= FIRST_PSEUDO_REGISTER + && (prohibited_class_reg_set_mode_p + (goal_alt[i], reg_class_contents[goal_alt[i]], + GET_MODE (reg))) + && !(prohibited_class_reg_set_mode_p + (goal_alt[i], reg_class_contents[goal_alt[i]], + mode)))) { /* An OP_INOUT is required when reloading a subreg of a mode wider than a word to ensure that data beyond the diff --git a/gcc/testsuite/gcc.target/mips/pr106462.c b/gcc/testsuite/gcc.target/mips/pr106462.c new file mode 100644 index 0000000..c910540 --- /dev/null +++ b/gcc/testsuite/gcc.target/mips/pr106462.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-mabi=64 -msingle-float" } */ + +extern void bar (float x, short y); + +void foo (int argc) +{ + short c = argc * 2; + float a = (float)(short)c, b = 9.5; + + bar (b/a, c); +} |