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| author | Jose E. Marchesi <jose.marchesi@oracle.com> | 2023-07-14 13:54:06 +0200 |
|---|---|---|
| committer | Jose E. Marchesi <jose.marchesi@oracle.com> | 2023-07-14 14:17:38 +0200 |
| commit | 53d12ecd624ec901d8449cfa1917f6f90e910927 (patch) | |
| tree | ef3733d8bfb2cf5b2613167eff63413d5959975b /gcc | |
| parent | 9206641d0899e4bae3ad6765129661ff3bcc423a (diff) | |
| download | gcc-53d12ecd624ec901d8449cfa1917f6f90e910927.zip gcc-53d12ecd624ec901d8449cfa1917f6f90e910927.tar.gz gcc-53d12ecd624ec901d8449cfa1917f6f90e910927.tar.bz2 | |
bpf: enable instruction scheduling
This patch adds a dummy FSM to bpf.md in order to get INSN_SCHEDULING
defined. If the later is not defined, the `combine' pass generates
paradoxical subregs of mems, which seems to then be mishandled by LRA,
resulting in invalid code.
Tested in bpf-unknown-none.
gcc/ChangeLog:
2023-07-14 Jose E. Marchesi <jose.marchesi@oracle.com>
PR target/110657
* config/bpf/bpf.md: Enable instruction scheduling.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/bpf/bpf.md | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/config/bpf/bpf.md b/gcc/config/bpf/bpf.md index f6be0a2..329f62f 100644 --- a/gcc/config/bpf/bpf.md +++ b/gcc/config/bpf/bpf.md @@ -20,6 +20,17 @@ (include "predicates.md") (include "constraints.md") +;;;; Instruction Scheduler FSM + +;; This is just to get INSN_SCHEDULING defined, so that combine does +;; not make paradoxical subregs of memory. These subregs seems to +;; confuse LRA that ends generating wrong instructions. + +(define_automaton "frob") +(define_cpu_unit "frob_unit" "frob") +(define_insn_reservation "frobnicator" 814 + (const_int 0) "frob_unit") + ;;;; Unspecs (define_c_enum "unspec" [ |