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| author | Takayuki 'January June' Suwa <jjsuwa_sys3175@yahoo.co.jp> | 2023-02-18 13:54:10 +0900 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2023-02-20 17:32:31 -0800 |
| commit | a804419c89db9e1c0b99e772dda6c95095bab0bf (patch) | |
| tree | c0e46cf88e38167dcc9ab0611050e756a5c80b6d | |
| parent | 65c64105a816a887092b954dee0340e45c9495b4 (diff) | |
| download | gcc-a804419c89db9e1c0b99e772dda6c95095bab0bf.zip gcc-a804419c89db9e1c0b99e772dda6c95095bab0bf.tar.gz gcc-a804419c89db9e1c0b99e772dda6c95095bab0bf.tar.bz2 | |
xtensa: Enforce return address saving when -Og is specified
Leaf function often omits saving its return address to the stack slot,
and this feature often makes debugging very confusing, especially for
stack dump analysis.
gcc/ChangeLog:
* config/xtensa/xtensa.cc (xtensa_call_save_reg): Change to return
true if register A0 (return address register) when -Og is specified.
| -rw-r--r-- | gcc/config/xtensa/xtensa.cc | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/gcc/config/xtensa/xtensa.cc b/gcc/config/xtensa/xtensa.cc index 3e2e22d..d0320ef 100644 --- a/gcc/config/xtensa/xtensa.cc +++ b/gcc/config/xtensa/xtensa.cc @@ -3223,8 +3223,11 @@ xtensa_call_save_reg (int regno) return false; if (regno == A0_REG) - return crtl->profile || !crtl->is_leaf || crtl->calls_eh_return || - df_regs_ever_live_p (regno); + /* Ensure the return address to be saved to the stack slot in order + to assist stack dump analysis when -Og is specified. */ + return optimize_debug + || crtl->profile || !crtl->is_leaf || crtl->calls_eh_return + || df_regs_ever_live_p (regno); if (crtl->calls_eh_return && IN_RANGE (regno, 2, 3)) return true; |