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| author | Juzhe-Zhong <juzhe.zhong@rivai.ai> | 2023-09-20 22:58:49 +0800 |
|---|---|---|
| committer | Robin Dapp <rdapp@ventanamicro.com> | 2023-09-20 18:27:08 +0200 |
| commit | 27282dc0931484c31fa391772499d878afcc746a (patch) | |
| tree | 00f8ac0e91c22bb4c105172dc283def4104ef363 /libgcc/enable-execute-stack-empty.c | |
| parent | 75c4b0cde4835b45350da0a5cd82f1d1a0a7a2f1 (diff) | |
| download | gcc-27282dc0931484c31fa391772499d878afcc746a.zip gcc-27282dc0931484c31fa391772499d878afcc746a.tar.gz gcc-27282dc0931484c31fa391772499d878afcc746a.tar.bz2 | |
internal-fn: Support undefined rtx for uninitialized SSA_NAME[PR110751]
According to PR: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110751
As Richard and Richi suggested, we recognize uninitialized SSA_NAME and convert it
into SCRATCH rtx if the target predicate allows SCRATCH.
It can help to reduce redundant data move instructions of targets like RISC-V.
Bootstrap and Regression on x86 passed.
gcc/ChangeLog:
PR target/110751
* internal-fn.cc (expand_fn_using_insn): Support undefined rtx value.
* optabs.cc (maybe_legitimize_operand): Ditto.
(can_reuse_operands_p): Ditto.
* optabs.h (enum expand_operand_type): Ditto.
(create_undefined_input_operand): Ditto.
Diffstat (limited to 'libgcc/enable-execute-stack-empty.c')
0 files changed, 0 insertions, 0 deletions