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| author | Jin Ma <jinma@linux.alibaba.com> | 2023-02-03 17:42:59 +0800 |
|---|---|---|
| committer | Kito Cheng <kito.cheng@sifive.com> | 2023-02-12 19:31:25 +0800 |
| commit | 52009fa79cdb497b9e410bb4a5b54960a4a44463 (patch) | |
| tree | 2f1034bdeb7b2bc5c3285bea655a772b416cf16f /gcc | |
| parent | 2cd7cbaf51f0057d570406b2540796161af756a6 (diff) | |
| download | gcc-52009fa79cdb497b9e410bb4a5b54960a4a44463.zip gcc-52009fa79cdb497b9e410bb4a5b54960a4a44463.tar.gz gcc-52009fa79cdb497b9e410bb4a5b54960a4a44463.tar.bz2 | |
RISC-V: Change the generation mode of ADJUST_SP_RTX from gen_insn to gen_SET.
The gen_insn method is used to generate ADJUST_SP_RTX here, which has certain
potential risks:
When the architecture adds pre-processing to `define_insn "adddi3"`, such as
`define_expend "adddi3"`, the gen_expand will be automatically called here,
causing the patern to emit directly, which will cause insn to enter REG_NOTE
for `DWARF` instead of patern.
The following error REG_NOTE occurred:
error: invalid rtl sharing found in the insn:
(insn 19 3 20 2 (parallel [
...
])
(expr_list:REG_CFA_ADJUST_CFA
(insn 18 0 0 (set (reg/f:DI 2 sp)
(plus:DI (reg/f:DI 2 sp)
(const_int -16 [0xfffffffffffffff0]))) -1
(nil))))
In fact, the correct one should be the following:
(insn 19 3 20 2 (parallel [
...
])
(expr_list:REG_CFA_ADJUST_CFA
(set (reg/f:DI 2 sp)
(plus:DI (reg/f:DI 2 sp)
(const_int -16 [0xfffffffffffffff0])))))
Following the treatment of arm or other architectures, it is more reasonable to
use gen_SET here.
gcc/ChangeLog:
* config/riscv/riscv.cc (riscv_adjust_libcall_cfi_prologue): Change
gen_add3_insn to gen_rtx_SET.
(riscv_adjust_libcall_cfi_epilogue): Likewise.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/riscv/riscv.cc | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc index a282c7c..de3e1f9 100644 --- a/gcc/config/riscv/riscv.cc +++ b/gcc/config/riscv/riscv.cc @@ -5082,8 +5082,9 @@ riscv_adjust_libcall_cfi_prologue () } /* Debug info for adjust sp. */ - adjust_sp_rtx = gen_add3_insn (stack_pointer_rtx, - stack_pointer_rtx, GEN_INT (-saved_size)); + adjust_sp_rtx = + gen_rtx_SET (stack_pointer_rtx, + gen_rtx_PLUS (GET_MODE(stack_pointer_rtx), stack_pointer_rtx, GEN_INT (-saved_size))); dwarf = alloc_reg_note (REG_CFA_ADJUST_CFA, adjust_sp_rtx, dwarf); return dwarf; @@ -5204,8 +5205,9 @@ riscv_adjust_libcall_cfi_epilogue () int saved_size = cfun->machine->frame.save_libcall_adjustment; /* Debug info for adjust sp. */ - adjust_sp_rtx = gen_add3_insn (stack_pointer_rtx, - stack_pointer_rtx, GEN_INT (saved_size)); + adjust_sp_rtx = + gen_rtx_SET (stack_pointer_rtx, + gen_rtx_PLUS (GET_MODE(stack_pointer_rtx), stack_pointer_rtx, GEN_INT (saved_size))); dwarf = alloc_reg_note (REG_CFA_ADJUST_CFA, adjust_sp_rtx, dwarf); |