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[PATCH v2] RISC-V: Make sure stack is always aligned during adjusting
- From: Kito Cheng <kito dot cheng at gmail dot com>
- To: Jim Wilson <jimw at sifive dot com>, patches at groups dot riscv dot org, GCC Patches <gcc-patches at gcc dot gnu dot org>, Palmer Dabbelt <palmer at sifive dot com>, Andrew Waterman <andrew at sifive dot com>
- Date: Fri, 20 Apr 2018 10:48:15 +0800
- Subject: [PATCH v2] RISC-V: Make sure stack is always aligned during adjusting
It's v2 patch for fixing stack align for rv32*c target.
gcc/ChangeLog:
2018-04-18 Kito Cheng <kito.cheng@gmail.com>
* config/riscv/riscv.c (riscv_first_stack_step): Round up min
step to make sure stack always aligned.
v1: https://gcc.gnu.org/ml/gcc-patches/2018-04/msg00877.html
From 3787f36a689222dd3b0b95e9f2c54b7fbaa8c671 Mon Sep 17 00:00:00 2001
From: Kito Cheng <kito.cheng@gmail.com>
Date: Wed, 18 Apr 2018 17:51:35 +0800
Subject: [PATCH] RISC-V: Make sure stack is always aligned during adjusting
stack.
gcc/ChangeLog:
2018-04-18 Kito Cheng <kito.cheng@gmail.com>
* config/riscv/riscv.c (riscv_first_stack_step): Round up min
step to make sure stack always aligned.
---
gcc/config/riscv/riscv.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c
index 2870177fa97..2a8f87d1e94 100644
--- a/gcc/config/riscv/riscv.c
+++ b/gcc/config/riscv/riscv.c
@@ -3507,7 +3507,8 @@ riscv_first_stack_step (struct riscv_frame_info *frame)
if (SMALL_OPERAND (frame->total_size))
return frame->total_size;
- HOST_WIDE_INT min_first_step = frame->total_size - frame->fp_sp_offset;
+ HOST_WIDE_INT min_first_step =
+ RISCV_STACK_ALIGN (frame->total_size - frame->fp_sp_offset);
HOST_WIDE_INT max_first_step = IMM_REACH / 2 - PREFERRED_STACK_BOUNDARY / 8;
HOST_WIDE_INT min_second_step = frame->total_size - max_first_step;
gcc_assert (min_first_step <= max_first_step);
--
2.11.2