2 Commits

Author SHA1 Message Date
dlav-sc
97982a8c60
[RISCV][CFI] add function epilogue cfi information (#110810)
This patch adds CFI instructions in the function epilogue.

Before patch:
addi sp, s0, -32
ld ra, 24(sp) # 8-byte Folded Reload
ld s0, 16(sp) # 8-byte Folded Reload
ld s1, 8(sp) # 8-byte Folded Reload
addi sp, sp, 32
ret

After patch:
addi sp, s0, -32
.cfi_def_cfa sp, 32
ld ra, 24(sp) # 8-byte Folded Reload
ld s0, 16(sp) # 8-byte Folded Reload
ld s1, 8(sp) # 8-byte Folded Reload
.cfi_restore ra
.cfi_restore s0
.cfi_restore s1
addi sp, sp, 32
.cfi_def_cfa_offset 0
ret

This functionality is already present in `riscv-gcc`, but it’s not in
`clang` and this slightly impairs the `lldb` debugging experience, e.g.
backtrace.
2024-11-06 00:20:21 +03:00
Sacha Coppey
776889bc1c [RISCV] Add Stackmap/Statepoint/Patchpoint support without targets
This patch adds stackmap support for RISC-V without targets (i.e. the nop patchable forms).

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D123496
2023-10-11 09:18:55 +05:30