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| author | Lulu Cheng <chenglulu@loongson.cn> | 2023-06-29 19:30:59 +0800 |
|---|---|---|
| committer | Lulu Cheng <chenglulu@loongson.cn> | 2023-09-01 10:04:21 +0800 |
| commit | 1967f21d000e09d3d3190317af7923b578ce02b1 (patch) | |
| tree | 90c00df22eb6bfcd76b6314f7bc306e9bcd30ff0 | |
| parent | 65c36eccb89447c6d0c8e6aff7ced4092dd5d359 (diff) | |
| download | gcc-1967f21d000e09d3d3190317af7923b578ce02b1.zip gcc-1967f21d000e09d3d3190317af7923b578ce02b1.tar.gz gcc-1967f21d000e09d3d3190317af7923b578ce02b1.tar.bz2 | |
LoongArch: Fix bug in loongarch_emit_stack_tie [PR110484].
Which may result in implicit references to $fp when frame_pointer_needed is false,
causing regs_ever_live[$fp] to be true when $fp is not explicitly used,
resulting in $fp being used as the target replacement register in the rnreg pass.
The bug originates from SPEC2017 541.leela_r(-flto).
gcc/ChangeLog:
PR target/110484
* config/loongarch/loongarch.cc (loongarch_emit_stack_tie): Use the
frame_pointer_needed to determine whether to use the $fp register.
Co-authored-by: Guo Jie <guojie@loongson.cn>
| -rw-r--r-- | gcc/config/loongarch/loongarch.cc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc index 1905599..c72229c 100644 --- a/gcc/config/loongarch/loongarch.cc +++ b/gcc/config/loongarch/loongarch.cc @@ -1112,7 +1112,9 @@ loongarch_first_stack_step (struct loongarch_frame_info *frame) static void loongarch_emit_stack_tie (void) { - emit_insn (gen_stack_tie (Pmode, stack_pointer_rtx, hard_frame_pointer_rtx)); + emit_insn (gen_stack_tie (Pmode, stack_pointer_rtx, + frame_pointer_needed ? hard_frame_pointer_rtx + : stack_pointer_rtx)); } #define PROBE_INTERVAL (1 << STACK_CHECK_PROBE_INTERVAL_EXP) |