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aarch64: Extend the offset limit in "symbol + offset" from 1MB to 16MB

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This patch allows using an offset of up to 16MB in "symbol + offset",
instead of 1MB limit that was used previously.

gcc/ChangeLog:

	* config/aarch64/aarch64.cc (aarch64_load_symref_appropriately):
	Update.
This commit is contained in:
Evgeny Karpov 2024-09-12 13:19:32 +02:00 committed by Evgeny Karpov
parent 71381ecc1e
commit 55788176f1
1 changed files with 15 additions and 0 deletions
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15
gcc/config/aarch64/aarch64.cc
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@ -3030,7 +3030,22 @@ aarch64_load_symref_appropriately (rtx dest, rtx imm,
if (can_create_pseudo_p ())
tmp_reg = gen_reg_rtx (mode);
HOST_WIDE_INT mid_const = 0;
if (TARGET_PECOFF)
{
poly_int64 offset;
strip_offset (imm, &offset);
HOST_WIDE_INT const_offset;
if (offset.is_constant (&const_offset))
/* Written this way for the sake of negative offsets. */
mid_const = const_offset / (1 << 20) * (1 << 20);
}
imm = plus_constant (mode, imm, -mid_const);
emit_move_insn (tmp_reg, gen_rtx_HIGH (mode, copy_rtx (imm)));
if (mid_const)
emit_set_insn (tmp_reg, plus_constant (mode, tmp_reg, mid_const));
emit_insn (gen_add_losym (dest, tmp_reg, imm));
return;
}