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42 lines
1.5 KiB
Diff
42 lines
1.5 KiB
Diff
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From 04553281f42e5c4340d554a93d1a73006365d8fb Mon Sep 17 00:00:00 2001
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From: Richard Sandiford <richard.sandiford@arm.com>
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Date: Fri, 16 Jun 2023 17:00:51 +0100
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Subject: [PATCH 24/30] aarch64: Explicitly handle frames with no saved
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registers
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If a frame has no saved registers, it can be allocated in one go.
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There is no need to treat the areas below and above the saved
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registers as separate.
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This is a no-op as thing stand, since a leaf function will have
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no outgoing arguments, and so all the frame will be above where
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the saved registers normally go.
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gcc/
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* config/aarch64/aarch64.c (aarch64_layout_frame): Explicitly
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allocate the frame in one go if there are no saved registers.
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---
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gcc/config/aarch64/aarch64.c | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
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index 4e94be3b0b4d..bb4f6020e5df 100644
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--- a/gcc/config/aarch64/aarch64.c
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+++ b/gcc/config/aarch64/aarch64.c
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@@ -2901,8 +2901,10 @@ aarch64_layout_frame (void)
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else if (cfun->machine->frame.wb_candidate1 != INVALID_REGNUM)
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max_push_offset = 256;
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- if (cfun->machine->frame.frame_size < max_push_offset
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- && crtl->outgoing_args_size == 0)
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+ if (cfun->machine->frame.saved_regs_size == 0)
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+ cfun->machine->frame.initial_adjust = cfun->machine->frame.frame_size;
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+ else if (cfun->machine->frame.frame_size < max_push_offset
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+ && crtl->outgoing_args_size == 0)
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{
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/* Simple, small frame with no outgoing arguments:
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stp reg1, reg2, [sp, -frame_size]!
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--
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2.42.0
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