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RISC-V: Make sure stack is always aligned during adjusting stack.

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gcc/
	2018-04-20  Kito Cheng  <kito.cheng@gmail.com>
	* config/riscv/riscv.c (riscv_first_stack_step): Round up min
	step to make sure stack always aligned.

From-SVN: r259530
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Kito Cheng 2018-04-20 19:03:19 +00:00 • committed by Jim Wilson
parent b593a195f9
commit 9b922d6aaf
2 changed files with 7 additions and 1 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2018-04-20 Kito Cheng <kito.cheng@gmail.com>
* config/riscv/riscv.c (riscv_first_stack_step): Round up min
step to make sure stack always aligned.
2018-04-20 Carl Love <cel@us.ibm.com>
PR target/83402

3
gcc/config/riscv/riscv.c
View file

@ -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);